TI LMU LED support rework and introduction of two new drivers
with DT bindings: - leds-lm3697 - leds-lm36274 -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQUwxxKyE5l/npt8ARiEGxRG/Sl2wUCXQAatQAKCRBiEGxRG/Sl 2/2KAQDHnHR0rIITh3hH49YutOCzGK4oaut8sXfy+8PTEdKBlQEApQP1O1RJTTws /KDS8qpNdwOQOW/KYiYDX5R8GcOeZwg= =we/t -----END PGP SIGNATURE----- Merge tag 'ti-lmu-led-drivers' into for-next Merge immutable branch between LEDs, MFD and REGULATOR due to TI LMU LED support rework and introduction of two new drivers with DT bindings. * tag 'ti-lmu-led-drivers': leds: lm36274: Introduce the TI LM36274 LED driver dt-bindings: leds: Add LED bindings for the LM36274 regulator: lm363x: Add support for LM36274 mfd: ti-lmu: Add LM36274 support to the ti-lmu dt-bindings: mfd: Add lm36274 bindings to ti-lmu leds: lm3697: Introduce the lm3697 driver mfd: ti-lmu: Remove support for LM3697 dt-bindings: ti-lmu: Modify dt bindings for the LM3697 leds: TI LMU: Add common code for TI LMU devices dt-bindings: mfd: LMU: Add ti,brightness-resolution dt-bindings: mfd: LMU: Add the ramp up/down propertyalistair/sunxi64-5.4-dsi
commit
25529edef5
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@ -0,0 +1,85 @@
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* Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias
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The LM36274 is an integrated four-channel WLED driver and LCD bias supply.
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The backlight boost provides the power to bias four parallel LED strings with
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up to 29V total output voltage. The 11-bit LED current is programmable via
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the I2C bus and/or controlled via a logic level PWM input from 60 uA to 30 mA.
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Parent device properties are documented in
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Documentation/devicetree/bindings/mfd/ti_lmu.txt
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Regulator properties are documented in
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Documentation/devicetree/bindings/regulator/lm363x-regulator.txt
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Required backlight properties:
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- compatible:
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"ti,lm36274-backlight"
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- reg : 0
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- #address-cells : 1
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- #size-cells : 0
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- led-sources : Indicates which LED strings will be enabled.
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Values from 0-3, sources is 0 based so strings will be
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source value + 1.
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Optional backlight properties:
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- label : see Documentation/devicetree/bindings/leds/common.txt
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- linux,default-trigger :
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see Documentation/devicetree/bindings/leds/common.txt
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Example:
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HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is
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controlled by control bank B.
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lm36274@11 {
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compatible = "ti,lm36274";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x11>;
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enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
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regulators {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "ti,lm363x-regulator";
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enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
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<&pioC 1 GPIO_ACTIVE_HIGH>;
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vboost {
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regulator-name = "lcd_boost";
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regulator-min-microvolt = <4000000>;
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regulator-max-microvolt = <7150000>;
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regulator-always-on;
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};
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vpos {
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regulator-name = "lcd_vpos";
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regulator-min-microvolt = <4000000>;
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regulator-max-microvolt = <6500000>;
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};
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vneg {
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regulator-name = "lcd_vneg";
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regulator-min-microvolt = <4000000>;
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regulator-max-microvolt = <6500000>;
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};
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};
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backlight {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "ti,lm36274-backlight";
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led@0 {
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reg = <0>;
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led-sources = <0 2>;
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label = "white:backlight_cluster";
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linux,default-trigger = "backlight";
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};
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};
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};
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For more product information please see the link below:
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http://www.ti.com/lit/ds/symlink/lm36274.pdf
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@ -0,0 +1,73 @@
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* Texas Instruments - LM3697 Highly Efficient White LED Driver
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The LM3697 11-bit LED driver provides high-
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performance backlight dimming for 1, 2, or 3 series
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LED strings while delivering up to 90% efficiency.
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This device is suitable for display and keypad lighting
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Required properties:
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- compatible:
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"ti,lm3697"
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- reg : I2C slave address
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- #address-cells : 1
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- #size-cells : 0
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Optional properties:
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- enable-gpios : GPIO pin to enable/disable the device
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- vled-supply : LED supply
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Required child properties:
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- reg : 0 - LED is Controlled by bank A
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1 - LED is Controlled by bank B
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- led-sources : Indicates which HVLED string is associated to which
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control bank. This is a zero based property so
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HVLED1 = 0, HVLED2 = 1, HVLED3 = 2.
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Additional information is contained
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in Documentation/devicetree/bindings/leds/common.txt
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Optional child properties:
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- ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt
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- ramp-up-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
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- ramp-down-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
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- label : see Documentation/devicetree/bindings/leds/common.txt
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- linux,default-trigger :
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see Documentation/devicetree/bindings/leds/common.txt
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Example:
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HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is
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controlled by control bank B.
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led-controller@36 {
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compatible = "ti,lm3697";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x36>;
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enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
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vled-supply = <&vbatt>;
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led@0 {
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reg = <0>;
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led-sources = <0 2>;
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ti,brightness-resolution = <2047>;
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ramp-up-us = <5000>;
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ramp-down-us = <1000>;
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label = "white:first_backlight_cluster";
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linux,default-trigger = "backlight";
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};
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led@1 {
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reg = <1>;
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led-sources = <1>;
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ti,brightness-resolution = <255>;
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ramp-up-us = <500>;
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ramp-down-us = <1000>;
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label = "white:second_backlight_cluster";
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linux,default-trigger = "backlight";
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};
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}
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For more product information please see the link below:
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http://www.ti.com/lit/ds/symlink/lm3697.pdf
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@ -8,7 +8,7 @@ TI LMU driver supports lighting devices below.
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LM3632 Backlight and regulator
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LM3632 Backlight and regulator
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LM3633 Backlight, LED and fault monitor
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LM3633 Backlight, LED and fault monitor
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LM3695 Backlight
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LM3695 Backlight
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LM3697 Backlight and fault monitor
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LM36274 Backlight and regulator
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Required properties:
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Required properties:
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- compatible: Should be one of:
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- compatible: Should be one of:
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@ -16,15 +16,32 @@ Required properties:
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"ti,lm3632"
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"ti,lm3632"
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"ti,lm3633"
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"ti,lm3633"
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"ti,lm3695"
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"ti,lm3695"
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"ti,lm3697"
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"ti,lm36274"
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- reg: I2C slave address.
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- reg: I2C slave address.
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0x11 for LM3632
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0x11 for LM3632
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0x29 for LM3631
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0x29 for LM3631
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0x36 for LM3633, LM3697
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0x36 for LM3633
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0x63 for LM3695
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0x63 for LM3695
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0x11 for LM36274
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Optional property:
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Optional properties:
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- enable-gpios: A GPIO specifier for hardware enable pin.
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- enable-gpios: A GPIO specifier for hardware enable pin.
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- ramp-up-us: Current ramping from one brightness level to
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the a higher brightness level.
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Range from 2048 us - 117.44 s
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- ramp-down-us: Current ramping from one brightness level to
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the a lower brightness level.
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Range from 2048 us - 117.44 s
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- ti,brightness-resolution - This determines whether to use 8 bit brightness
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mode or 11 bit brightness mode. If this value is
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not set the device is defaulted to the preferred
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8bit brightness mode per 7.3.4.1 of the data
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sheet. This setting can either be in the parent
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node or as part of the LED child nodes. This
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is determined by the part itself if the strings
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have a common brightness register or individual
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brightness registers.
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The values are 255 (8bit) or 2047 (11bit).
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Required node:
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Required node:
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- backlight: All LMU devices have backlight child nodes.
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- backlight: All LMU devices have backlight child nodes.
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@ -35,14 +52,15 @@ Optional nodes:
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Required properties:
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Required properties:
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- compatible: Should be one of:
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- compatible: Should be one of:
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"ti,lm3633-fault-monitor"
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"ti,lm3633-fault-monitor"
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"ti,lm3697-fault-monitor"
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- leds: LED properties for LM3633. Please refer to [2].
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- leds: LED properties for LM3633. Please refer to [2].
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LED properties for LM36274. Please refer to [4].
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- regulators: Regulator properties for LM3631 and LM3632.
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- regulators: Regulator properties for LM3631 and LM3632.
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Please refer to [3].
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Please refer to [3].
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[1] ../leds/backlight/ti-lmu-backlight.txt
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[1] ../leds/backlight/ti-lmu-backlight.txt
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[2] ../leds/leds-lm3633.txt
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[2] ../leds/leds-lm3633.txt
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[3] ../regulator/lm363x-regulator.txt
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[3] ../regulator/lm363x-regulator.txt
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[4] ../leds/leds-lm36274.txt
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lm3631@29 {
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lm3631@29 {
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compatible = "ti,lm3631";
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compatible = "ti,lm3631";
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@ -90,7 +108,7 @@ lm3631@29 {
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lcd_bl {
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lcd_bl {
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led-sources = <0 1>;
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led-sources = <0 1>;
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ramp-up-msec = <300>;
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ramp-up-us = <300000>;
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};
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};
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};
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};
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};
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};
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@ -152,15 +170,15 @@ lm3633@36 {
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main {
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main {
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label = "main_lcd";
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label = "main_lcd";
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led-sources = <1 2>;
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led-sources = <1 2>;
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ramp-up-msec = <500>;
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ramp-up-us = <500000>;
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ramp-down-msec = <500>;
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ramp-down-us = <500000>;
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};
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};
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|
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front {
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front {
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label = "front_lcd";
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label = "front_lcd";
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led-sources = <0>;
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led-sources = <0>;
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ramp-up-msec = <1000>;
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ramp-up-us = <1000000>;
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ramp-down-msec = <0>;
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ramp-down-us = <0>;
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};
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};
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};
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};
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@ -201,23 +219,51 @@ lm3695@63 {
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};
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};
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};
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};
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|
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lm3697@36 {
|
lm36274@11 {
|
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compatible = "ti,lm3697";
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compatible = "ti,lm36274";
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reg = <0x36>;
|
#address-cells = <1>;
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||||||
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#size-cells = <0>;
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reg = <0x11>;
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|
|
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enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
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enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
|
||||||
|
regulators {
|
||||||
|
#address-cells = <1>;
|
||||||
|
#size-cells = <0>;
|
||||||
|
compatible = "ti,lm363x-regulator";
|
||||||
|
|
||||||
backlight {
|
enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
|
||||||
compatible = "ti,lm3697-backlight";
|
<&pioC 1 GPIO_ACTIVE_HIGH>;
|
||||||
|
|
||||||
lcd {
|
vboost {
|
||||||
led-sources = <0 1 2>;
|
regulator-name = "lcd_boost";
|
||||||
ramp-up-msec = <200>;
|
regulator-min-microvolt = <4000000>;
|
||||||
ramp-down-msec = <200>;
|
regulator-max-microvolt = <7150000>;
|
||||||
|
regulator-always-on;
|
||||||
|
};
|
||||||
|
|
||||||
|
vpos {
|
||||||
|
regulator-name = "lcd_vpos";
|
||||||
|
regulator-min-microvolt = <4000000>;
|
||||||
|
regulator-max-microvolt = <6500000>;
|
||||||
|
};
|
||||||
|
|
||||||
|
vneg {
|
||||||
|
regulator-name = "lcd_vneg";
|
||||||
|
regulator-min-microvolt = <4000000>;
|
||||||
|
regulator-max-microvolt = <6500000>;
|
||||||
};
|
};
|
||||||
};
|
};
|
||||||
|
|
||||||
fault-monitor {
|
backlight {
|
||||||
compatible = "ti,lm3697-fault-monitor";
|
#address-cells = <1>;
|
||||||
|
#size-cells = <0>;
|
||||||
|
compatible = "ti,lm36274-backlight";
|
||||||
|
|
||||||
|
led@0 {
|
||||||
|
reg = <0>;
|
||||||
|
led-sources = <0 2>;
|
||||||
|
label = "white:backlight_cluster";
|
||||||
|
linux,default-trigger = "backlight";
|
||||||
|
};
|
||||||
};
|
};
|
||||||
};
|
};
|
||||||
|
|
|
@ -793,6 +793,31 @@ config LEDS_SPI_BYTE
|
||||||
for controlling the brightness. Currently the following controller is
|
for controlling the brightness. Currently the following controller is
|
||||||
supported: Ubiquiti airCube ISP microcontroller based LED controller.
|
supported: Ubiquiti airCube ISP microcontroller based LED controller.
|
||||||
|
|
||||||
|
config LEDS_TI_LMU_COMMON
|
||||||
|
tristate "LED driver for TI LMU"
|
||||||
|
depends on LEDS_CLASS
|
||||||
|
depends on REGMAP
|
||||||
|
help
|
||||||
|
Say Y to enable the LED driver for TI LMU devices.
|
||||||
|
This supports common features between the TI LM3532, LM3631, LM3632,
|
||||||
|
LM3633, LM3695 and LM3697.
|
||||||
|
|
||||||
|
config LEDS_LM3697
|
||||||
|
tristate "LED driver for LM3697"
|
||||||
|
depends on LEDS_TI_LMU_COMMON
|
||||||
|
depends on I2C && OF
|
||||||
|
help
|
||||||
|
Say Y to enable the LM3697 LED driver for TI LMU devices.
|
||||||
|
This supports the LED device LM3697.
|
||||||
|
|
||||||
|
config LEDS_LM36274
|
||||||
|
tristate "LED driver for LM36274"
|
||||||
|
depends on LEDS_TI_LMU_COMMON
|
||||||
|
depends on MFD_TI_LMU
|
||||||
|
help
|
||||||
|
Say Y to enable the LM36274 LED driver for TI LMU devices.
|
||||||
|
This supports the LED device LM36274.
|
||||||
|
|
||||||
comment "LED Triggers"
|
comment "LED Triggers"
|
||||||
source "drivers/leds/trigger/Kconfig"
|
source "drivers/leds/trigger/Kconfig"
|
||||||
|
|
||||||
|
|
|
@ -82,6 +82,9 @@ obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o
|
||||||
obj-$(CONFIG_LEDS_LM3692X) += leds-lm3692x.o
|
obj-$(CONFIG_LEDS_LM3692X) += leds-lm3692x.o
|
||||||
obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
|
obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
|
||||||
obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o
|
obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o
|
||||||
|
obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o
|
||||||
|
obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o
|
||||||
|
obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o
|
||||||
|
|
||||||
# LED SPI Drivers
|
# LED SPI Drivers
|
||||||
obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o
|
obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o
|
||||||
|
|
|
@ -0,0 +1,172 @@
|
||||||
|
// SPDX-License-Identifier: GPL-2.0
|
||||||
|
// TI LM36274 LED chip family driver
|
||||||
|
// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
|
||||||
|
|
||||||
|
#include <linux/bitops.h>
|
||||||
|
#include <linux/device.h>
|
||||||
|
#include <linux/err.h>
|
||||||
|
#include <linux/leds.h>
|
||||||
|
#include <linux/leds-ti-lmu-common.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/of_device.h>
|
||||||
|
#include <linux/platform_device.h>
|
||||||
|
|
||||||
|
#include <linux/mfd/ti-lmu.h>
|
||||||
|
#include <linux/mfd/ti-lmu-register.h>
|
||||||
|
|
||||||
|
#include <uapi/linux/uleds.h>
|
||||||
|
|
||||||
|
#define LM36274_MAX_STRINGS 4
|
||||||
|
#define LM36274_BL_EN BIT(4)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* struct lm36274
|
||||||
|
* @pdev: platform device
|
||||||
|
* @led_dev: led class device
|
||||||
|
* @lmu_data: Register and setting values for common code
|
||||||
|
* @regmap: Devices register map
|
||||||
|
* @dev: Pointer to the devices device struct
|
||||||
|
* @led_sources - The LED strings supported in this array
|
||||||
|
* @num_leds - Number of LED strings are supported in this array
|
||||||
|
*/
|
||||||
|
struct lm36274 {
|
||||||
|
struct platform_device *pdev;
|
||||||
|
struct led_classdev led_dev;
|
||||||
|
struct ti_lmu_bank lmu_data;
|
||||||
|
struct regmap *regmap;
|
||||||
|
struct device *dev;
|
||||||
|
|
||||||
|
u32 led_sources[LM36274_MAX_STRINGS];
|
||||||
|
int num_leds;
|
||||||
|
};
|
||||||
|
|
||||||
|
static int lm36274_brightness_set(struct led_classdev *led_cdev,
|
||||||
|
enum led_brightness brt_val)
|
||||||
|
{
|
||||||
|
struct lm36274 *led = container_of(led_cdev, struct lm36274, led_dev);
|
||||||
|
|
||||||
|
return ti_lmu_common_set_brightness(&led->lmu_data, brt_val);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm36274_init(struct lm36274 *lm36274_data)
|
||||||
|
{
|
||||||
|
int enable_val = 0;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (i = 0; i < lm36274_data->num_leds; i++)
|
||||||
|
enable_val |= (1 << lm36274_data->led_sources[i]);
|
||||||
|
|
||||||
|
if (!enable_val) {
|
||||||
|
dev_err(lm36274_data->dev, "No LEDs were enabled\n");
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
enable_val |= LM36274_BL_EN;
|
||||||
|
|
||||||
|
return regmap_write(lm36274_data->regmap, LM36274_REG_BL_EN,
|
||||||
|
enable_val);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm36274_parse_dt(struct lm36274 *lm36274_data)
|
||||||
|
{
|
||||||
|
struct fwnode_handle *child = NULL;
|
||||||
|
char label[LED_MAX_NAME_SIZE];
|
||||||
|
struct device *dev = &lm36274_data->pdev->dev;
|
||||||
|
const char *name;
|
||||||
|
int child_cnt;
|
||||||
|
int ret = -EINVAL;
|
||||||
|
|
||||||
|
/* There should only be 1 node */
|
||||||
|
child_cnt = device_get_child_node_count(dev);
|
||||||
|
if (child_cnt != 1)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
device_for_each_child_node(dev, child) {
|
||||||
|
ret = fwnode_property_read_string(child, "label", &name);
|
||||||
|
if (ret)
|
||||||
|
snprintf(label, sizeof(label),
|
||||||
|
"%s::", lm36274_data->pdev->name);
|
||||||
|
else
|
||||||
|
snprintf(label, sizeof(label),
|
||||||
|
"%s:%s", lm36274_data->pdev->name, name);
|
||||||
|
|
||||||
|
lm36274_data->num_leds = fwnode_property_read_u32_array(child,
|
||||||
|
"led-sources",
|
||||||
|
NULL, 0);
|
||||||
|
if (lm36274_data->num_leds <= 0)
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
ret = fwnode_property_read_u32_array(child, "led-sources",
|
||||||
|
lm36274_data->led_sources,
|
||||||
|
lm36274_data->num_leds);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(dev, "led-sources property missing\n");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
fwnode_property_read_string(child, "linux,default-trigger",
|
||||||
|
&lm36274_data->led_dev.default_trigger);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
lm36274_data->lmu_data.regmap = lm36274_data->regmap;
|
||||||
|
lm36274_data->lmu_data.max_brightness = MAX_BRIGHTNESS_11BIT;
|
||||||
|
lm36274_data->lmu_data.msb_brightness_reg = LM36274_REG_BRT_MSB;
|
||||||
|
lm36274_data->lmu_data.lsb_brightness_reg = LM36274_REG_BRT_LSB;
|
||||||
|
|
||||||
|
lm36274_data->led_dev.name = label;
|
||||||
|
lm36274_data->led_dev.max_brightness = MAX_BRIGHTNESS_11BIT;
|
||||||
|
lm36274_data->led_dev.brightness_set_blocking = lm36274_brightness_set;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm36274_probe(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
|
||||||
|
struct lm36274 *lm36274_data;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
lm36274_data = devm_kzalloc(&pdev->dev, sizeof(*lm36274_data),
|
||||||
|
GFP_KERNEL);
|
||||||
|
if (!lm36274_data)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
lm36274_data->pdev = pdev;
|
||||||
|
lm36274_data->dev = lmu->dev;
|
||||||
|
lm36274_data->regmap = lmu->regmap;
|
||||||
|
dev_set_drvdata(&pdev->dev, lm36274_data);
|
||||||
|
|
||||||
|
ret = lm36274_parse_dt(lm36274_data);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(lm36274_data->dev, "Failed to parse DT node\n");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = lm36274_init(lm36274_data);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(lm36274_data->dev, "Failed to init the device\n");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
return devm_led_classdev_register(lm36274_data->dev,
|
||||||
|
&lm36274_data->led_dev);
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct of_device_id of_lm36274_leds_match[] = {
|
||||||
|
{ .compatible = "ti,lm36274-backlight", },
|
||||||
|
{},
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(of, of_lm36274_leds_match);
|
||||||
|
|
||||||
|
static struct platform_driver lm36274_driver = {
|
||||||
|
.probe = lm36274_probe,
|
||||||
|
.driver = {
|
||||||
|
.name = "lm36274-leds",
|
||||||
|
},
|
||||||
|
};
|
||||||
|
module_platform_driver(lm36274_driver)
|
||||||
|
|
||||||
|
MODULE_DESCRIPTION("Texas Instruments LM36274 LED driver");
|
||||||
|
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
|
@ -0,0 +1,395 @@
|
||||||
|
// SPDX-License-Identifier: GPL-2.0
|
||||||
|
// TI LM3697 LED chip family driver
|
||||||
|
// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
|
||||||
|
|
||||||
|
#include <linux/gpio/consumer.h>
|
||||||
|
#include <linux/i2c.h>
|
||||||
|
#include <linux/of.h>
|
||||||
|
#include <linux/of_gpio.h>
|
||||||
|
#include <linux/regulator/consumer.h>
|
||||||
|
#include <linux/leds-ti-lmu-common.h>
|
||||||
|
|
||||||
|
#define LM3697_REV 0x0
|
||||||
|
#define LM3697_RESET 0x1
|
||||||
|
#define LM3697_OUTPUT_CONFIG 0x10
|
||||||
|
#define LM3697_CTRL_A_RAMP 0x11
|
||||||
|
#define LM3697_CTRL_B_RAMP 0x12
|
||||||
|
#define LM3697_CTRL_A_B_RT_RAMP 0x13
|
||||||
|
#define LM3697_CTRL_A_B_RAMP_CFG 0x14
|
||||||
|
#define LM3697_CTRL_A_B_BRT_CFG 0x16
|
||||||
|
#define LM3697_CTRL_A_FS_CURR_CFG 0x17
|
||||||
|
#define LM3697_CTRL_B_FS_CURR_CFG 0x18
|
||||||
|
#define LM3697_PWM_CFG 0x1c
|
||||||
|
#define LM3697_CTRL_A_BRT_LSB 0x20
|
||||||
|
#define LM3697_CTRL_A_BRT_MSB 0x21
|
||||||
|
#define LM3697_CTRL_B_BRT_LSB 0x22
|
||||||
|
#define LM3697_CTRL_B_BRT_MSB 0x23
|
||||||
|
#define LM3697_CTRL_ENABLE 0x24
|
||||||
|
|
||||||
|
#define LM3697_SW_RESET BIT(0)
|
||||||
|
|
||||||
|
#define LM3697_CTRL_A_EN BIT(0)
|
||||||
|
#define LM3697_CTRL_B_EN BIT(1)
|
||||||
|
#define LM3697_CTRL_A_B_EN (LM3697_CTRL_A_EN | LM3697_CTRL_B_EN)
|
||||||
|
|
||||||
|
#define LM3697_MAX_LED_STRINGS 3
|
||||||
|
|
||||||
|
#define LM3697_CONTROL_A 0
|
||||||
|
#define LM3697_CONTROL_B 1
|
||||||
|
#define LM3697_MAX_CONTROL_BANKS 2
|
||||||
|
|
||||||
|
/**
|
||||||
|
* struct lm3697_led -
|
||||||
|
* @hvled_strings: Array of LED strings associated with a control bank
|
||||||
|
* @label: LED label
|
||||||
|
* @led_dev: LED class device
|
||||||
|
* @priv: Pointer to the device struct
|
||||||
|
* @lmu_data: Register and setting values for common code
|
||||||
|
* @control_bank: Control bank the LED is associated to. 0 is control bank A
|
||||||
|
* 1 is control bank B
|
||||||
|
*/
|
||||||
|
struct lm3697_led {
|
||||||
|
u32 hvled_strings[LM3697_MAX_LED_STRINGS];
|
||||||
|
char label[LED_MAX_NAME_SIZE];
|
||||||
|
struct led_classdev led_dev;
|
||||||
|
struct lm3697 *priv;
|
||||||
|
struct ti_lmu_bank lmu_data;
|
||||||
|
int control_bank;
|
||||||
|
int enabled;
|
||||||
|
int num_leds;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* struct lm3697 -
|
||||||
|
* @enable_gpio: Hardware enable gpio
|
||||||
|
* @regulator: LED supply regulator pointer
|
||||||
|
* @client: Pointer to the I2C client
|
||||||
|
* @regmap: Devices register map
|
||||||
|
* @dev: Pointer to the devices device struct
|
||||||
|
* @lock: Lock for reading/writing the device
|
||||||
|
* @leds: Array of LED strings
|
||||||
|
*/
|
||||||
|
struct lm3697 {
|
||||||
|
struct gpio_desc *enable_gpio;
|
||||||
|
struct regulator *regulator;
|
||||||
|
struct i2c_client *client;
|
||||||
|
struct regmap *regmap;
|
||||||
|
struct device *dev;
|
||||||
|
struct mutex lock;
|
||||||
|
|
||||||
|
int bank_cfg;
|
||||||
|
|
||||||
|
struct lm3697_led leds[];
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct reg_default lm3697_reg_defs[] = {
|
||||||
|
{LM3697_OUTPUT_CONFIG, 0x6},
|
||||||
|
{LM3697_CTRL_A_RAMP, 0x0},
|
||||||
|
{LM3697_CTRL_B_RAMP, 0x0},
|
||||||
|
{LM3697_CTRL_A_B_RT_RAMP, 0x0},
|
||||||
|
{LM3697_CTRL_A_B_RAMP_CFG, 0x0},
|
||||||
|
{LM3697_CTRL_A_B_BRT_CFG, 0x0},
|
||||||
|
{LM3697_CTRL_A_FS_CURR_CFG, 0x13},
|
||||||
|
{LM3697_CTRL_B_FS_CURR_CFG, 0x13},
|
||||||
|
{LM3697_PWM_CFG, 0xc},
|
||||||
|
{LM3697_CTRL_A_BRT_LSB, 0x0},
|
||||||
|
{LM3697_CTRL_A_BRT_MSB, 0x0},
|
||||||
|
{LM3697_CTRL_B_BRT_LSB, 0x0},
|
||||||
|
{LM3697_CTRL_B_BRT_MSB, 0x0},
|
||||||
|
{LM3697_CTRL_ENABLE, 0x0},
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_config lm3697_regmap_config = {
|
||||||
|
.reg_bits = 8,
|
||||||
|
.val_bits = 8,
|
||||||
|
|
||||||
|
.max_register = LM3697_CTRL_ENABLE,
|
||||||
|
.reg_defaults = lm3697_reg_defs,
|
||||||
|
.num_reg_defaults = ARRAY_SIZE(lm3697_reg_defs),
|
||||||
|
.cache_type = REGCACHE_FLAT,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int lm3697_brightness_set(struct led_classdev *led_cdev,
|
||||||
|
enum led_brightness brt_val)
|
||||||
|
{
|
||||||
|
struct lm3697_led *led = container_of(led_cdev, struct lm3697_led,
|
||||||
|
led_dev);
|
||||||
|
int ctrl_en_val = (1 << led->control_bank);
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
mutex_lock(&led->priv->lock);
|
||||||
|
|
||||||
|
if (brt_val == LED_OFF) {
|
||||||
|
ret = regmap_update_bits(led->priv->regmap, LM3697_CTRL_ENABLE,
|
||||||
|
ctrl_en_val, ~ctrl_en_val);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&led->priv->client->dev, "Cannot write ctrl register\n");
|
||||||
|
goto brightness_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
led->enabled = LED_OFF;
|
||||||
|
} else {
|
||||||
|
ret = ti_lmu_common_set_brightness(&led->lmu_data, brt_val);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&led->priv->client->dev,
|
||||||
|
"Cannot write brightness\n");
|
||||||
|
goto brightness_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!led->enabled) {
|
||||||
|
ret = regmap_update_bits(led->priv->regmap,
|
||||||
|
LM3697_CTRL_ENABLE,
|
||||||
|
ctrl_en_val, ctrl_en_val);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&led->priv->client->dev,
|
||||||
|
"Cannot enable the device\n");
|
||||||
|
goto brightness_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
led->enabled = brt_val;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
brightness_out:
|
||||||
|
mutex_unlock(&led->priv->lock);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm3697_init(struct lm3697 *priv)
|
||||||
|
{
|
||||||
|
struct lm3697_led *led;
|
||||||
|
int i, ret;
|
||||||
|
|
||||||
|
if (priv->enable_gpio) {
|
||||||
|
gpiod_direction_output(priv->enable_gpio, 1);
|
||||||
|
} else {
|
||||||
|
ret = regmap_write(priv->regmap, LM3697_RESET, LM3697_SW_RESET);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&priv->client->dev, "Cannot reset the device\n");
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = regmap_write(priv->regmap, LM3697_CTRL_ENABLE, 0x0);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&priv->client->dev, "Cannot write ctrl enable\n");
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = regmap_write(priv->regmap, LM3697_OUTPUT_CONFIG, priv->bank_cfg);
|
||||||
|
if (ret)
|
||||||
|
dev_err(&priv->client->dev, "Cannot write OUTPUT config\n");
|
||||||
|
|
||||||
|
for (i = 0; i < LM3697_MAX_CONTROL_BANKS; i++) {
|
||||||
|
led = &priv->leds[i];
|
||||||
|
ret = ti_lmu_common_set_ramp(&led->lmu_data);
|
||||||
|
if (ret)
|
||||||
|
dev_err(&priv->client->dev, "Setting the ramp rate failed\n");
|
||||||
|
}
|
||||||
|
out:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm3697_probe_dt(struct lm3697 *priv)
|
||||||
|
{
|
||||||
|
struct fwnode_handle *child = NULL;
|
||||||
|
struct lm3697_led *led;
|
||||||
|
const char *name;
|
||||||
|
int control_bank;
|
||||||
|
size_t i = 0;
|
||||||
|
int ret = -EINVAL;
|
||||||
|
int j;
|
||||||
|
|
||||||
|
priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
|
||||||
|
"enable", GPIOD_OUT_LOW);
|
||||||
|
if (IS_ERR(priv->enable_gpio)) {
|
||||||
|
ret = PTR_ERR(priv->enable_gpio);
|
||||||
|
dev_err(&priv->client->dev, "Failed to get enable gpio: %d\n",
|
||||||
|
ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
priv->regulator = devm_regulator_get(&priv->client->dev, "vled");
|
||||||
|
if (IS_ERR(priv->regulator))
|
||||||
|
priv->regulator = NULL;
|
||||||
|
|
||||||
|
device_for_each_child_node(priv->dev, child) {
|
||||||
|
ret = fwnode_property_read_u32(child, "reg", &control_bank);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&priv->client->dev, "reg property missing\n");
|
||||||
|
fwnode_handle_put(child);
|
||||||
|
goto child_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (control_bank > LM3697_CONTROL_B) {
|
||||||
|
dev_err(&priv->client->dev, "reg property is invalid\n");
|
||||||
|
ret = -EINVAL;
|
||||||
|
fwnode_handle_put(child);
|
||||||
|
goto child_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
led = &priv->leds[i];
|
||||||
|
|
||||||
|
ret = ti_lmu_common_get_brt_res(&priv->client->dev,
|
||||||
|
child, &led->lmu_data);
|
||||||
|
if (ret)
|
||||||
|
dev_warn(&priv->client->dev, "brightness resolution property missing\n");
|
||||||
|
|
||||||
|
led->control_bank = control_bank;
|
||||||
|
led->lmu_data.regmap = priv->regmap;
|
||||||
|
led->lmu_data.runtime_ramp_reg = LM3697_CTRL_A_RAMP +
|
||||||
|
control_bank;
|
||||||
|
led->lmu_data.msb_brightness_reg = LM3697_CTRL_A_BRT_MSB +
|
||||||
|
led->control_bank * 2;
|
||||||
|
led->lmu_data.lsb_brightness_reg = LM3697_CTRL_A_BRT_LSB +
|
||||||
|
led->control_bank * 2;
|
||||||
|
|
||||||
|
led->num_leds = fwnode_property_read_u32_array(child,
|
||||||
|
"led-sources",
|
||||||
|
NULL, 0);
|
||||||
|
|
||||||
|
if (led->num_leds > LM3697_MAX_LED_STRINGS) {
|
||||||
|
dev_err(&priv->client->dev, "To many LED strings defined\n");
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = fwnode_property_read_u32_array(child, "led-sources",
|
||||||
|
led->hvled_strings,
|
||||||
|
led->num_leds);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&priv->client->dev, "led-sources property missing\n");
|
||||||
|
fwnode_handle_put(child);
|
||||||
|
goto child_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (j = 0; j < led->num_leds; j++)
|
||||||
|
priv->bank_cfg |=
|
||||||
|
(led->control_bank << led->hvled_strings[j]);
|
||||||
|
|
||||||
|
ret = ti_lmu_common_get_ramp_params(&priv->client->dev,
|
||||||
|
child, &led->lmu_data);
|
||||||
|
if (ret)
|
||||||
|
dev_warn(&priv->client->dev, "runtime-ramp properties missing\n");
|
||||||
|
|
||||||
|
fwnode_property_read_string(child, "linux,default-trigger",
|
||||||
|
&led->led_dev.default_trigger);
|
||||||
|
|
||||||
|
ret = fwnode_property_read_string(child, "label", &name);
|
||||||
|
if (ret)
|
||||||
|
snprintf(led->label, sizeof(led->label),
|
||||||
|
"%s::", priv->client->name);
|
||||||
|
else
|
||||||
|
snprintf(led->label, sizeof(led->label),
|
||||||
|
"%s:%s", priv->client->name, name);
|
||||||
|
|
||||||
|
led->priv = priv;
|
||||||
|
led->led_dev.name = led->label;
|
||||||
|
led->led_dev.max_brightness = led->lmu_data.max_brightness;
|
||||||
|
led->led_dev.brightness_set_blocking = lm3697_brightness_set;
|
||||||
|
|
||||||
|
ret = devm_led_classdev_register(priv->dev, &led->led_dev);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&priv->client->dev, "led register err: %d\n",
|
||||||
|
ret);
|
||||||
|
fwnode_handle_put(child);
|
||||||
|
goto child_out;
|
||||||
|
}
|
||||||
|
|
||||||
|
i++;
|
||||||
|
}
|
||||||
|
|
||||||
|
child_out:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm3697_probe(struct i2c_client *client,
|
||||||
|
const struct i2c_device_id *id)
|
||||||
|
{
|
||||||
|
struct lm3697 *led;
|
||||||
|
int count;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
count = device_get_child_node_count(&client->dev);
|
||||||
|
if (!count) {
|
||||||
|
dev_err(&client->dev, "LEDs are not defined in device tree!");
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
|
||||||
|
GFP_KERNEL);
|
||||||
|
if (!led)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
mutex_init(&led->lock);
|
||||||
|
i2c_set_clientdata(client, led);
|
||||||
|
|
||||||
|
led->client = client;
|
||||||
|
led->dev = &client->dev;
|
||||||
|
led->regmap = devm_regmap_init_i2c(client, &lm3697_regmap_config);
|
||||||
|
if (IS_ERR(led->regmap)) {
|
||||||
|
ret = PTR_ERR(led->regmap);
|
||||||
|
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
||||||
|
ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = lm3697_probe_dt(led);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return lm3697_init(led);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int lm3697_remove(struct i2c_client *client)
|
||||||
|
{
|
||||||
|
struct lm3697 *led = i2c_get_clientdata(client);
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = regmap_update_bits(led->regmap, LM3697_CTRL_ENABLE,
|
||||||
|
LM3697_CTRL_A_B_EN, 0);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&led->client->dev, "Failed to disable the device\n");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (led->enable_gpio)
|
||||||
|
gpiod_direction_output(led->enable_gpio, 0);
|
||||||
|
|
||||||
|
if (led->regulator) {
|
||||||
|
ret = regulator_disable(led->regulator);
|
||||||
|
if (ret)
|
||||||
|
dev_err(&led->client->dev,
|
||||||
|
"Failed to disable regulator\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
mutex_destroy(&led->lock);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct i2c_device_id lm3697_id[] = {
|
||||||
|
{ "lm3697", 0 },
|
||||||
|
{ }
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(i2c, lm3697_id);
|
||||||
|
|
||||||
|
static const struct of_device_id of_lm3697_leds_match[] = {
|
||||||
|
{ .compatible = "ti,lm3697", },
|
||||||
|
{},
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(of, of_lm3697_leds_match);
|
||||||
|
|
||||||
|
static struct i2c_driver lm3697_driver = {
|
||||||
|
.driver = {
|
||||||
|
.name = "lm3697",
|
||||||
|
.of_match_table = of_lm3697_leds_match,
|
||||||
|
},
|
||||||
|
.probe = lm3697_probe,
|
||||||
|
.remove = lm3697_remove,
|
||||||
|
.id_table = lm3697_id,
|
||||||
|
};
|
||||||
|
module_i2c_driver(lm3697_driver);
|
||||||
|
|
||||||
|
MODULE_DESCRIPTION("Texas Instruments LM3697 LED driver");
|
||||||
|
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
|
@ -0,0 +1,156 @@
|
||||||
|
// SPDX-License-Identifier: GPL-2.0
|
||||||
|
// Copyright 2015 Texas Instruments
|
||||||
|
// Copyright 2018 Sebastian Reichel
|
||||||
|
// Copyright 2018 Pavel Machek <pavel@ucw.cz>
|
||||||
|
// TI LMU LED common framework, based on previous work from
|
||||||
|
// Milo Kim <milo.kim@ti.com>
|
||||||
|
|
||||||
|
#include <linux/bitops.h>
|
||||||
|
#include <linux/err.h>
|
||||||
|
#include <linux/of_device.h>
|
||||||
|
|
||||||
|
#include <linux/leds-ti-lmu-common.h>
|
||||||
|
|
||||||
|
const static int ramp_table[16] = {2048, 262000, 524000, 1049000, 2090000,
|
||||||
|
4194000, 8389000, 16780000, 33550000, 41940000,
|
||||||
|
50330000, 58720000, 67110000, 83880000,
|
||||||
|
100660000, 117440000};
|
||||||
|
|
||||||
|
static int ti_lmu_common_update_brightness(struct ti_lmu_bank *lmu_bank,
|
||||||
|
int brightness)
|
||||||
|
{
|
||||||
|
struct regmap *regmap = lmu_bank->regmap;
|
||||||
|
u8 reg, val;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Brightness register update
|
||||||
|
*
|
||||||
|
* 11 bit dimming: update LSB bits and write MSB byte.
|
||||||
|
* MSB brightness should be shifted.
|
||||||
|
* 8 bit dimming: write MSB byte.
|
||||||
|
*/
|
||||||
|
if (lmu_bank->max_brightness == MAX_BRIGHTNESS_11BIT) {
|
||||||
|
reg = lmu_bank->lsb_brightness_reg;
|
||||||
|
ret = regmap_update_bits(regmap, reg,
|
||||||
|
LMU_11BIT_LSB_MASK,
|
||||||
|
brightness);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
val = brightness >> LMU_11BIT_MSB_SHIFT;
|
||||||
|
} else {
|
||||||
|
val = brightness;
|
||||||
|
}
|
||||||
|
|
||||||
|
reg = lmu_bank->msb_brightness_reg;
|
||||||
|
|
||||||
|
return regmap_write(regmap, reg, val);
|
||||||
|
}
|
||||||
|
|
||||||
|
int ti_lmu_common_set_brightness(struct ti_lmu_bank *lmu_bank, int brightness)
|
||||||
|
{
|
||||||
|
return ti_lmu_common_update_brightness(lmu_bank, brightness);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(ti_lmu_common_set_brightness);
|
||||||
|
|
||||||
|
static int ti_lmu_common_convert_ramp_to_index(unsigned int usec)
|
||||||
|
{
|
||||||
|
int size = ARRAY_SIZE(ramp_table);
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (usec <= ramp_table[0])
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if (usec > ramp_table[size - 1])
|
||||||
|
return size - 1;
|
||||||
|
|
||||||
|
for (i = 1; i < size; i++) {
|
||||||
|
if (usec == ramp_table[i])
|
||||||
|
return i;
|
||||||
|
|
||||||
|
/* Find an approximate index by looking up the table */
|
||||||
|
if (usec > ramp_table[i - 1] && usec < ramp_table[i]) {
|
||||||
|
if (usec - ramp_table[i - 1] < ramp_table[i] - usec)
|
||||||
|
return i - 1;
|
||||||
|
else
|
||||||
|
return i;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ti_lmu_common_set_ramp(struct ti_lmu_bank *lmu_bank)
|
||||||
|
{
|
||||||
|
struct regmap *regmap = lmu_bank->regmap;
|
||||||
|
u8 ramp, ramp_up, ramp_down;
|
||||||
|
|
||||||
|
if (lmu_bank->ramp_up_usec == 0 && lmu_bank->ramp_down_usec == 0) {
|
||||||
|
ramp_up = 0;
|
||||||
|
ramp_down = 0;
|
||||||
|
} else {
|
||||||
|
ramp_up = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_up_usec);
|
||||||
|
ramp_down = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_down_usec);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ramp_up < 0 || ramp_down < 0)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
ramp = (ramp_up << 4) | ramp_down;
|
||||||
|
|
||||||
|
return regmap_write(regmap, lmu_bank->runtime_ramp_reg, ramp);
|
||||||
|
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(ti_lmu_common_set_ramp);
|
||||||
|
|
||||||
|
int ti_lmu_common_get_ramp_params(struct device *dev,
|
||||||
|
struct fwnode_handle *child,
|
||||||
|
struct ti_lmu_bank *lmu_data)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = fwnode_property_read_u32(child, "ramp-up-us",
|
||||||
|
&lmu_data->ramp_up_usec);
|
||||||
|
if (ret)
|
||||||
|
dev_warn(dev, "ramp-up-us property missing\n");
|
||||||
|
|
||||||
|
|
||||||
|
ret = fwnode_property_read_u32(child, "ramp-down-us",
|
||||||
|
&lmu_data->ramp_down_usec);
|
||||||
|
if (ret)
|
||||||
|
dev_warn(dev, "ramp-down-us property missing\n");
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(ti_lmu_common_get_ramp_params);
|
||||||
|
|
||||||
|
int ti_lmu_common_get_brt_res(struct device *dev, struct fwnode_handle *child,
|
||||||
|
struct ti_lmu_bank *lmu_data)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = device_property_read_u32(dev, "ti,brightness-resolution",
|
||||||
|
&lmu_data->max_brightness);
|
||||||
|
if (ret)
|
||||||
|
ret = fwnode_property_read_u32(child,
|
||||||
|
"ti,brightness-resolution",
|
||||||
|
&lmu_data->max_brightness);
|
||||||
|
if (lmu_data->max_brightness <= 0) {
|
||||||
|
lmu_data->max_brightness = MAX_BRIGHTNESS_8BIT;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (lmu_data->max_brightness > MAX_BRIGHTNESS_11BIT)
|
||||||
|
lmu_data->max_brightness = MAX_BRIGHTNESS_11BIT;
|
||||||
|
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(ti_lmu_common_get_brt_res);
|
||||||
|
|
||||||
|
MODULE_DESCRIPTION("TI LMU common LED framework");
|
||||||
|
MODULE_AUTHOR("Sebastian Reichel");
|
||||||
|
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
|
MODULE_ALIAS("ti-lmu-led-common");
|
|
@ -1335,9 +1335,8 @@ config MFD_TI_LMU
|
||||||
select REGMAP_I2C
|
select REGMAP_I2C
|
||||||
help
|
help
|
||||||
Say yes here to enable support for TI LMU chips.
|
Say yes here to enable support for TI LMU chips.
|
||||||
|
TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, LM3695 and
|
||||||
TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.
|
LM36274. It consists of backlight, LED and regulator driver.
|
||||||
It consists of backlight, LED and regulator driver.
|
|
||||||
It provides consistent device controls for lighting functions.
|
It provides consistent device controls for lighting functions.
|
||||||
|
|
||||||
config MFD_OMAP_USB_HOST
|
config MFD_OMAP_USB_HOST
|
||||||
|
|
|
@ -111,17 +111,14 @@ static const struct mfd_cell lm3695_devices[] = {
|
||||||
},
|
},
|
||||||
};
|
};
|
||||||
|
|
||||||
static const struct mfd_cell lm3697_devices[] = {
|
static const struct mfd_cell lm36274_devices[] = {
|
||||||
|
LM363X_REGULATOR(LM36274_BOOST),
|
||||||
|
LM363X_REGULATOR(LM36274_LDO_POS),
|
||||||
|
LM363X_REGULATOR(LM36274_LDO_NEG),
|
||||||
{
|
{
|
||||||
.name = "ti-lmu-backlight",
|
.name = "lm36274-leds",
|
||||||
.id = LM3697,
|
.id = LM36274,
|
||||||
.of_compatible = "ti,lm3697-backlight",
|
.of_compatible = "ti,lm36274-backlight",
|
||||||
},
|
|
||||||
/* Monitoring driver for open/short circuit detection */
|
|
||||||
{
|
|
||||||
.name = "ti-lmu-fault-monitor",
|
|
||||||
.id = LM3697,
|
|
||||||
.of_compatible = "ti,lm3697-fault-monitor",
|
|
||||||
},
|
},
|
||||||
};
|
};
|
||||||
|
|
||||||
|
@ -137,7 +134,7 @@ TI_LMU_DATA(lm3631, LM3631_MAX_REG);
|
||||||
TI_LMU_DATA(lm3632, LM3632_MAX_REG);
|
TI_LMU_DATA(lm3632, LM3632_MAX_REG);
|
||||||
TI_LMU_DATA(lm3633, LM3633_MAX_REG);
|
TI_LMU_DATA(lm3633, LM3633_MAX_REG);
|
||||||
TI_LMU_DATA(lm3695, LM3695_MAX_REG);
|
TI_LMU_DATA(lm3695, LM3695_MAX_REG);
|
||||||
TI_LMU_DATA(lm3697, LM3697_MAX_REG);
|
TI_LMU_DATA(lm36274, LM36274_MAX_REG);
|
||||||
|
|
||||||
static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
|
static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
|
||||||
{
|
{
|
||||||
|
@ -206,7 +203,7 @@ static const struct of_device_id ti_lmu_of_match[] = {
|
||||||
{ .compatible = "ti,lm3632", .data = &lm3632_data },
|
{ .compatible = "ti,lm3632", .data = &lm3632_data },
|
||||||
{ .compatible = "ti,lm3633", .data = &lm3633_data },
|
{ .compatible = "ti,lm3633", .data = &lm3633_data },
|
||||||
{ .compatible = "ti,lm3695", .data = &lm3695_data },
|
{ .compatible = "ti,lm3695", .data = &lm3695_data },
|
||||||
{ .compatible = "ti,lm3697", .data = &lm3697_data },
|
{ .compatible = "ti,lm36274", .data = &lm36274_data },
|
||||||
{ }
|
{ }
|
||||||
};
|
};
|
||||||
MODULE_DEVICE_TABLE(of, ti_lmu_of_match);
|
MODULE_DEVICE_TABLE(of, ti_lmu_of_match);
|
||||||
|
@ -216,7 +213,7 @@ static const struct i2c_device_id ti_lmu_ids[] = {
|
||||||
{ "lm3632", LM3632 },
|
{ "lm3632", LM3632 },
|
||||||
{ "lm3633", LM3633 },
|
{ "lm3633", LM3633 },
|
||||||
{ "lm3695", LM3695 },
|
{ "lm3695", LM3695 },
|
||||||
{ "lm3697", LM3697 },
|
{ "lm36274", LM36274 },
|
||||||
{ }
|
{ }
|
||||||
};
|
};
|
||||||
MODULE_DEVICE_TABLE(i2c, ti_lmu_ids);
|
MODULE_DEVICE_TABLE(i2c, ti_lmu_ids);
|
||||||
|
|
|
@ -363,7 +363,7 @@ config REGULATOR_LM363X
|
||||||
tristate "TI LM363X voltage regulators"
|
tristate "TI LM363X voltage regulators"
|
||||||
depends on MFD_TI_LMU
|
depends on MFD_TI_LMU
|
||||||
help
|
help
|
||||||
This driver supports LM3631 and LM3632 voltage regulators for
|
This driver supports LM3631, LM3632 and LM36274 voltage regulators for
|
||||||
the LCD bias.
|
the LCD bias.
|
||||||
One boost output voltage is configurable and always on.
|
One boost output voltage is configurable and always on.
|
||||||
Other LDOs are used for the display module.
|
Other LDOs are used for the display module.
|
||||||
|
|
|
@ -37,6 +37,11 @@
|
||||||
#define LM3632_VBOOST_MIN 4500000
|
#define LM3632_VBOOST_MIN 4500000
|
||||||
#define LM3632_VLDO_MIN 4000000
|
#define LM3632_VLDO_MIN 4000000
|
||||||
|
|
||||||
|
/* LM36274 */
|
||||||
|
#define LM36274_BOOST_VSEL_MAX 0x3f
|
||||||
|
#define LM36274_LDO_VSEL_MAX 0x34
|
||||||
|
#define LM36274_VOLTAGE_MIN 4000000
|
||||||
|
|
||||||
/* Common */
|
/* Common */
|
||||||
#define LM363X_STEP_50mV 50000
|
#define LM363X_STEP_50mV 50000
|
||||||
#define LM363X_STEP_500mV 500000
|
#define LM363X_STEP_500mV 500000
|
||||||
|
@ -217,6 +222,51 @@ static const struct regulator_desc lm363x_regulator_desc[] = {
|
||||||
.enable_reg = LM3632_REG_BIAS_CONFIG,
|
.enable_reg = LM3632_REG_BIAS_CONFIG,
|
||||||
.enable_mask = LM3632_EN_VNEG_MASK,
|
.enable_mask = LM3632_EN_VNEG_MASK,
|
||||||
},
|
},
|
||||||
|
|
||||||
|
/* LM36274 */
|
||||||
|
{
|
||||||
|
.name = "vboost",
|
||||||
|
.of_match = "vboost",
|
||||||
|
.id = LM36274_BOOST,
|
||||||
|
.ops = &lm363x_boost_voltage_table_ops,
|
||||||
|
.n_voltages = LM36274_BOOST_VSEL_MAX,
|
||||||
|
.min_uV = LM36274_VOLTAGE_MIN,
|
||||||
|
.uV_step = LM363X_STEP_50mV,
|
||||||
|
.type = REGULATOR_VOLTAGE,
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.vsel_reg = LM36274_REG_VOUT_BOOST,
|
||||||
|
.vsel_mask = LM36274_VOUT_MASK,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
.name = "ldo_vpos",
|
||||||
|
.of_match = "vpos",
|
||||||
|
.id = LM36274_LDO_POS,
|
||||||
|
.ops = &lm363x_regulator_voltage_table_ops,
|
||||||
|
.n_voltages = LM36274_LDO_VSEL_MAX,
|
||||||
|
.min_uV = LM36274_VOLTAGE_MIN,
|
||||||
|
.uV_step = LM363X_STEP_50mV,
|
||||||
|
.type = REGULATOR_VOLTAGE,
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.vsel_reg = LM36274_REG_VOUT_POS,
|
||||||
|
.vsel_mask = LM36274_VOUT_MASK,
|
||||||
|
.enable_reg = LM36274_REG_BIAS_CONFIG_1,
|
||||||
|
.enable_mask = LM36274_EN_VPOS_MASK,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
.name = "ldo_vneg",
|
||||||
|
.of_match = "vneg",
|
||||||
|
.id = LM36274_LDO_NEG,
|
||||||
|
.ops = &lm363x_regulator_voltage_table_ops,
|
||||||
|
.n_voltages = LM36274_LDO_VSEL_MAX,
|
||||||
|
.min_uV = LM36274_VOLTAGE_MIN,
|
||||||
|
.uV_step = LM363X_STEP_50mV,
|
||||||
|
.type = REGULATOR_VOLTAGE,
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.vsel_reg = LM36274_REG_VOUT_NEG,
|
||||||
|
.vsel_mask = LM36274_VOUT_MASK,
|
||||||
|
.enable_reg = LM36274_REG_BIAS_CONFIG_1,
|
||||||
|
.enable_mask = LM36274_EN_VNEG_MASK,
|
||||||
|
},
|
||||||
};
|
};
|
||||||
|
|
||||||
static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
|
static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
|
||||||
|
@ -229,9 +279,11 @@ static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev,
|
||||||
*/
|
*/
|
||||||
switch (id) {
|
switch (id) {
|
||||||
case LM3632_LDO_POS:
|
case LM3632_LDO_POS:
|
||||||
|
case LM36274_LDO_POS:
|
||||||
return gpiod_get_index_optional(dev, "enable", 0,
|
return gpiod_get_index_optional(dev, "enable", 0,
|
||||||
GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
|
GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
|
||||||
case LM3632_LDO_NEG:
|
case LM3632_LDO_NEG:
|
||||||
|
case LM36274_LDO_NEG:
|
||||||
return gpiod_get_index_optional(dev, "enable", 1,
|
return gpiod_get_index_optional(dev, "enable", 1,
|
||||||
GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
|
GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
|
||||||
default:
|
default:
|
||||||
|
@ -239,6 +291,27 @@ static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int lm363x_regulator_set_ext_en(struct regmap *regmap, int id)
|
||||||
|
{
|
||||||
|
int ext_en_mask = 0;
|
||||||
|
|
||||||
|
switch (id) {
|
||||||
|
case LM3632_LDO_POS:
|
||||||
|
case LM3632_LDO_NEG:
|
||||||
|
ext_en_mask = LM3632_EXT_EN_MASK;
|
||||||
|
break;
|
||||||
|
case LM36274_LDO_POS:
|
||||||
|
case LM36274_LDO_NEG:
|
||||||
|
ext_en_mask = LM36274_EXT_EN_MASK;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
return regmap_update_bits(regmap, lm363x_regulator_desc[id].enable_reg,
|
||||||
|
ext_en_mask, ext_en_mask);
|
||||||
|
}
|
||||||
|
|
||||||
static int lm363x_regulator_probe(struct platform_device *pdev)
|
static int lm363x_regulator_probe(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
|
struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
|
||||||
|
@ -263,10 +336,7 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
|
||||||
|
|
||||||
if (gpiod) {
|
if (gpiod) {
|
||||||
cfg.ena_gpiod = gpiod;
|
cfg.ena_gpiod = gpiod;
|
||||||
|
ret = lm363x_regulator_set_ext_en(regmap, id);
|
||||||
ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
|
|
||||||
LM3632_EXT_EN_MASK,
|
|
||||||
LM3632_EXT_EN_MASK);
|
|
||||||
if (ret) {
|
if (ret) {
|
||||||
gpiod_put(gpiod);
|
gpiod_put(gpiod);
|
||||||
dev_err(dev, "External pin err: %d\n", ret);
|
dev_err(dev, "External pin err: %d\n", ret);
|
||||||
|
|
|
@ -0,0 +1,47 @@
|
||||||
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
// TI LMU Common Core
|
||||||
|
// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
|
||||||
|
|
||||||
|
#ifndef _TI_LMU_COMMON_H_
|
||||||
|
#define _TI_LMU_COMMON_H_
|
||||||
|
|
||||||
|
#include <linux/delay.h>
|
||||||
|
#include <linux/device.h>
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/leds.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/regmap.h>
|
||||||
|
#include <linux/slab.h>
|
||||||
|
#include <uapi/linux/uleds.h>
|
||||||
|
|
||||||
|
#define LMU_11BIT_LSB_MASK (BIT(0) | BIT(1) | BIT(2))
|
||||||
|
#define LMU_11BIT_MSB_SHIFT 3
|
||||||
|
|
||||||
|
#define MAX_BRIGHTNESS_8BIT 255
|
||||||
|
#define MAX_BRIGHTNESS_11BIT 2047
|
||||||
|
|
||||||
|
struct ti_lmu_bank {
|
||||||
|
struct regmap *regmap;
|
||||||
|
|
||||||
|
int max_brightness;
|
||||||
|
|
||||||
|
u8 lsb_brightness_reg;
|
||||||
|
u8 msb_brightness_reg;
|
||||||
|
|
||||||
|
u8 runtime_ramp_reg;
|
||||||
|
u32 ramp_up_usec;
|
||||||
|
u32 ramp_down_usec;
|
||||||
|
};
|
||||||
|
|
||||||
|
int ti_lmu_common_set_brightness(struct ti_lmu_bank *lmu_bank, int brightness);
|
||||||
|
|
||||||
|
int ti_lmu_common_set_ramp(struct ti_lmu_bank *lmu_bank);
|
||||||
|
|
||||||
|
int ti_lmu_common_get_ramp_params(struct device *dev,
|
||||||
|
struct fwnode_handle *child,
|
||||||
|
struct ti_lmu_bank *lmu_data);
|
||||||
|
|
||||||
|
int ti_lmu_common_get_brt_res(struct device *dev, struct fwnode_handle *child,
|
||||||
|
struct ti_lmu_bank *lmu_data);
|
||||||
|
|
||||||
|
#endif /* _TI_LMU_COMMON_H_ */
|
|
@ -190,47 +190,26 @@
|
||||||
|
|
||||||
#define LM3695_MAX_REG 0x14
|
#define LM3695_MAX_REG 0x14
|
||||||
|
|
||||||
/* LM3697 */
|
/* LM36274 */
|
||||||
#define LM3697_REG_HVLED_OUTPUT_CFG 0x10
|
#define LM36274_REG_REV 0x01
|
||||||
#define LM3697_HVLED1_CFG_MASK BIT(0)
|
#define LM36274_REG_BL_CFG_1 0x02
|
||||||
#define LM3697_HVLED2_CFG_MASK BIT(1)
|
#define LM36274_REG_BL_CFG_2 0x03
|
||||||
#define LM3697_HVLED3_CFG_MASK BIT(2)
|
#define LM36274_REG_BRT_LSB 0x04
|
||||||
#define LM3697_HVLED1_CFG_SHIFT 0
|
#define LM36274_REG_BRT_MSB 0x05
|
||||||
#define LM3697_HVLED2_CFG_SHIFT 1
|
#define LM36274_REG_BL_EN 0x08
|
||||||
#define LM3697_HVLED3_CFG_SHIFT 2
|
|
||||||
|
|
||||||
#define LM3697_REG_BL0_RAMP 0x11
|
#define LM36274_REG_BIAS_CONFIG_1 0x09
|
||||||
#define LM3697_REG_BL1_RAMP 0x12
|
#define LM36274_EXT_EN_MASK BIT(0)
|
||||||
#define LM3697_RAMPUP_MASK 0xF0
|
#define LM36274_EN_VNEG_MASK BIT(1)
|
||||||
#define LM3697_RAMPUP_SHIFT 4
|
#define LM36274_EN_VPOS_MASK BIT(2)
|
||||||
#define LM3697_RAMPDN_MASK 0x0F
|
|
||||||
#define LM3697_RAMPDN_SHIFT 0
|
|
||||||
|
|
||||||
#define LM3697_REG_RAMP_CONF 0x14
|
#define LM36274_REG_BIAS_CONFIG_2 0x0a
|
||||||
#define LM3697_RAMP_MASK 0x0F
|
#define LM36274_REG_BIAS_CONFIG_3 0x0b
|
||||||
#define LM3697_RAMP_EACH 0x05
|
#define LM36274_REG_VOUT_BOOST 0x0c
|
||||||
|
#define LM36274_REG_VOUT_POS 0x0d
|
||||||
|
#define LM36274_REG_VOUT_NEG 0x0e
|
||||||
|
#define LM36274_VOUT_MASK 0x3F
|
||||||
|
|
||||||
#define LM3697_REG_PWM_CFG 0x1C
|
#define LM36274_MAX_REG 0x13
|
||||||
#define LM3697_PWM_A_MASK BIT(0)
|
|
||||||
#define LM3697_PWM_B_MASK BIT(1)
|
|
||||||
|
|
||||||
#define LM3697_REG_IMAX_A 0x17
|
|
||||||
#define LM3697_REG_IMAX_B 0x18
|
|
||||||
|
|
||||||
#define LM3697_REG_FEEDBACK_ENABLE 0x19
|
|
||||||
|
|
||||||
#define LM3697_REG_BRT_A_LSB 0x20
|
|
||||||
#define LM3697_REG_BRT_A_MSB 0x21
|
|
||||||
#define LM3697_REG_BRT_B_LSB 0x22
|
|
||||||
#define LM3697_REG_BRT_B_MSB 0x23
|
|
||||||
|
|
||||||
#define LM3697_REG_ENABLE 0x24
|
|
||||||
|
|
||||||
#define LM3697_REG_OPEN_FAULT_STATUS 0xB0
|
|
||||||
|
|
||||||
#define LM3697_REG_SHORT_FAULT_STATUS 0xB2
|
|
||||||
|
|
||||||
#define LM3697_REG_MONITOR_ENABLE 0xB4
|
|
||||||
|
|
||||||
#define LM3697_MAX_REG 0xB4
|
|
||||||
#endif
|
#endif
|
||||||
|
|
|
@ -26,7 +26,7 @@ enum ti_lmu_id {
|
||||||
LM3632,
|
LM3632,
|
||||||
LM3633,
|
LM3633,
|
||||||
LM3695,
|
LM3695,
|
||||||
LM3697,
|
LM36274,
|
||||||
LMU_MAX_ID,
|
LMU_MAX_ID,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
@ -68,6 +68,9 @@ enum lm363x_regulator_id {
|
||||||
LM3632_BOOST, /* Boost output */
|
LM3632_BOOST, /* Boost output */
|
||||||
LM3632_LDO_POS, /* Positive display bias output */
|
LM3632_LDO_POS, /* Positive display bias output */
|
||||||
LM3632_LDO_NEG, /* Negative display bias output */
|
LM3632_LDO_NEG, /* Negative display bias output */
|
||||||
|
LM36274_BOOST, /* Boost output */
|
||||||
|
LM36274_LDO_POS, /* Positive display bias output */
|
||||||
|
LM36274_LDO_NEG, /* Negative display bias output */
|
||||||
};
|
};
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
|
Loading…
Reference in New Issue