dt-bindings: regulator/clock/mfd: Reorganize S2MPS-family bindings
Bindings for Samsung S2M and S5M family PMICs are in mess. They are spread over different files and subdirectories in a non-consistent way. The devices and respective drivers for them share a lot in common so everything could be organized in a more readable way. Reorganize the S2MPS11/13/14/15 Device Tree bindings to match the drivers for this family of devices: - move mfd/s2mps11.txt to mfd/samsung,sec-core.txt for the main MFD driver (common for entire family), - split clock block to clock/samsung,s2mps11.txt, - split regulator block to regulator/samsung,s2mps11.txt. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>hifive-unleashed-5.1
Krzysztof Kozlowski
Lee Jones
parent
f8e3a514bf
commit
a13c7c51fd
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Binding for Samsung S2M and S5M family clock generator block
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============================================================
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This is a part of device tree bindings for S2M and S5M family multi-function
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devices.
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More information can be found in bindings/mfd/sec-core.txt file.
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The S2MPS11/13/15 and S5M8767 provide three(AP/CP/BT) buffered 32.768 kHz
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outputs. The S2MPS14 provides two (AP/BT) buffered 32.768 KHz outputs.
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To register these as clocks with common clock framework instantiate under
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main device node a sub-node named "clocks".
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It uses the common clock binding documented in:
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- Documentation/devicetree/bindings/clock/clock-bindings.txt
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Required properties of the "clocks" sub-node:
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- #clock-cells: should be 1.
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- compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps13-clk",
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"samsung,s2mps14-clk", "samsung,s5m8767-clk"
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The S2MPS15 uses the same compatible as S2MPS13, as both provides similar
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clocks.
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Each clock is assigned an identifier and client nodes use this identifier
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to specify the clock which they consume.
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Clock ID Devices
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----------------------------------------------------------
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32KhzAP 0 S2MPS11/13/14/15, S5M8767
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32KhzCP 1 S2MPS11/13/15, S5M8767
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32KhzBT 2 S2MPS11/13/14/15, S5M8767
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Include dt-bindings/clock/samsung,s2mps11.h file to use preprocessor defines
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in device tree sources.
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Example:
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s2mps11_pmic@66 {
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compatible = "samsung,s2mps11-pmic";
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reg = <0x66>;
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s2m_osc: clocks {
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compatible = "samsung,s2mps11-clk";
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#clock-cells = <1>;
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clock-output-names = "xx", "yy", "zz";
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};
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};
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@ -1,153 +0,0 @@
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* Samsung S2MPS11/13/14/15 and S2MPU02 Voltage and Current Regulator
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The Samsung S2MPS11 is a multi-function device which includes voltage and
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current regulators, RTC, charger controller and other sub-blocks. It is
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interfaced to the host controller using an I2C interface. Each sub-block is
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addressed by the host system using different I2C slave addresses.
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Required properties:
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- compatible: Should be one of the following
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- "samsung,s2mps11-pmic"
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- "samsung,s2mps13-pmic"
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- "samsung,s2mps14-pmic"
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- "samsung,s2mps15-pmic"
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- "samsung,s2mpu02-pmic".
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- reg: Specifies the I2C slave address of the pmic block. It should be 0x66.
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Optional properties:
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- interrupt-parent: Specifies the phandle of the interrupt controller to which
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the interrupts from s2mps11 are delivered to.
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- interrupts: Interrupt specifiers for interrupt sources.
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- samsung,s2mps11-wrstbi-ground: Indicates that WRSTBI pin of PMIC is pulled
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down. When the system is suspended it will always go down thus triggerring
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unwanted buck warm reset (setting buck voltages to default values).
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- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
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connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
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register to turn off the power. Usually the ACOKB is pulled up to VBATT so
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when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
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Optional nodes:
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- clocks: s2mps11, s2mps13, s2mps15 and s5m8767 provide three(AP/CP/BT) buffered 32.768
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KHz outputs, so to register these as clocks with common clock framework
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instantiate a sub-node named "clocks". It uses the common clock binding
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documented in :
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[Documentation/devicetree/bindings/clock/clock-bindings.txt]
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The s2mps14 provides two (AP/BT) buffered 32.768 KHz outputs.
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- #clock-cells: should be 1.
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- The following is the list of clocks generated by the controller. Each clock
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is assigned an identifier and client nodes use this identifier to specify
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the clock which they consume.
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Clock ID Devices
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----------------------------------------------------------
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32KhzAP 0 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
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32KhzCP 1 S2MPS11, S2MPS13, S2MPS15, S5M8767
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32KhzBT 2 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
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- compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps13-clk",
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"samsung,s2mps14-clk", "samsung,s5m8767-clk"
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The s2msp15 uses the same compatible as s2mps13, as both provides similar clocks.
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- regulators: The regulators of s2mps11 that have to be instantiated should be
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included in a sub-node named 'regulators'. Regulator nodes included in this
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sub-node should be of the format as listed below.
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regulator_name {
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[standard regulator constraints....];
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};
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regulator-ramp-delay for BUCKs = [6250/12500/25000(default)/50000] uV/us
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BUCK[2/3/4/6] supports disabling ramp delay on hardware, so explicitly
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regulator-ramp-delay = <0> can be used for them to disable ramp delay.
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In the absence of the regulator-ramp-delay property, the default ramp
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delay will be used.
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NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set
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for a particular group of BUCKs. So provide same regulator-ramp-delay<value>.
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Grouping of BUCKs sharing ramp rate setting is as follow : BUCK[1, 6],
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BUCK[3, 4], and BUCK[7, 8, 10]
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On S2MPS14 the LDO10, LDO11 and LDO12 can be configured to external control
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over GPIO. To turn this feature on this property must be added to the regulator
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sub-node:
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- samsung,ext-control-gpios: GPIO specifier for one GPIO
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controlling this regulator (enable/disable);
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Example:
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LDO12 {
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regulator-name = "V_EMMC_2.8V";
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regulator-min-microvolt = <2800000>;
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regulator-max-microvolt = <2800000>;
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samsung,ext-control-gpios = <&gpk0 2 0>;
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};
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The regulator constraints inside the regulator nodes use the standard regulator
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bindings which are documented elsewhere.
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The following are the names of the regulators that the s2mps11 pmic block
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supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
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as per the datasheet of s2mps11.
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- LDOn
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- valid values for n are:
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- S2MPS11: 1 to 38
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- S2MPS13: 1 to 40
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- S2MPS14: 1 to 25
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- S2MPS15: 1 to 27
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- S2MPU02: 1 to 28
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- Example: LDO1, LDO2, LDO28
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- BUCKn
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- valid values for n are:
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- S2MPS11: 1 to 10
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- S2MPS13: 1 to 10
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- S2MPS14: 1 to 5
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- S2MPS15: 1 to 10
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- S2MPU02: 1 to 7
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- Example: BUCK1, BUCK2, BUCK9
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Example:
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s2mps11_pmic@66 {
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compatible = "samsung,s2mps11-pmic";
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reg = <0x66>;
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s2m_osc: clocks {
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compatible = "samsung,s2mps11-clk";
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#clock-cells = <1>;
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clock-output-names = "xx", "yy", "zz";
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};
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regulators {
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ldo1_reg: LDO1 {
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regulator-name = "VDD_ABB_3.3V";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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ldo2_reg: LDO2 {
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regulator-name = "VDD_ALIVE_1.1V";
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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};
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buck2_reg: BUCK2 {
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regulator-name = "vdd_arm";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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regulator-ramp-delay = <50000>;
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};
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};
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};
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@ -0,0 +1,84 @@
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Binding for Samsung S2M and S5M family multi-function device
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============================================================
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This is a part of device tree bindings for S2M and S5M family multi-function
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devices.
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The Samsung S2MPS11/13/14/15, S2MPU02 and S5M8767 is a family
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of multi-function devices which include voltage and current regulators, RTC,
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charger controller, clock outputs and other sub-blocks. It is interfaced
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to the host controller using an I2C interface. Each sub-block is usually
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addressed by the host system using different I2C slave addresses.
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This document describes bindings for main device node. Optional sub-blocks
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must be a sub-nodes to it. Bindings for them can be found in:
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- bindings/regulator/samsung,s2mps11.txt
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- bindings/clock/samsung,s2mps11.txt
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Required properties:
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- compatible: Should be one of the following
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- "samsung,s2mps11-pmic",
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- "samsung,s2mps13-pmic",
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- "samsung,s2mps14-pmic",
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- "samsung,s2mps15-pmic",
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- "samsung,s2mpu02-pmic".
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- reg: Specifies the I2C slave address of the pmic block. It should be 0x66.
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Optional properties:
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- interrupt-parent: Specifies the phandle of the interrupt controller to which
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the interrupts from s2mps11 are delivered to.
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- interrupts: Interrupt specifiers for interrupt sources.
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- samsung,s2mps11-wrstbi-ground: Indicates that WRSTBI pin of PMIC is pulled
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down. When the system is suspended it will always go down thus triggerring
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unwanted buck warm reset (setting buck voltages to default values).
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- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
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connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
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register to turn off the power. Usually the ACOKB is pulled up to VBATT so
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when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
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Example:
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s2mps11_pmic@66 {
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compatible = "samsung,s2mps11-pmic";
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reg = <0x66>;
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s2m_osc: clocks {
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compatible = "samsung,s2mps11-clk";
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#clock-cells = <1>;
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clock-output-names = "xx", "yy", "zz";
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};
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regulators {
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ldo1_reg: LDO1 {
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regulator-name = "VDD_ABB_3.3V";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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ldo2_reg: LDO2 {
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regulator-name = "VDD_ALIVE_1.1V";
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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};
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buck2_reg: BUCK2 {
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regulator-name = "vdd_arm";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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regulator-ramp-delay = <50000>;
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};
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};
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};
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@ -0,0 +1,102 @@
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Binding for Samsung S2M family regulator block
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==============================================
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This is a part of device tree bindings for S2M family multi-function devices.
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More information can be found in bindings/mfd/sec-core.txt file.
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The S2MPS11/13/14/15 and S2MPU02 devices provide buck and LDO regulators.
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To register these with regulator framework instantiate under main device node
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a sub-node named "regulators" with more sub-nodes for each regulator using the
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common regulator binding documented in:
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- Documentation/devicetree/bindings/regulator/regulator.txt
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Names of regulators supported by different devices:
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- LDOn
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- valid values for n are:
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- S2MPS11: 1 to 38
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- S2MPS13: 1 to 40
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- S2MPS14: 1 to 25
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- S2MPS15: 1 to 27
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- S2MPU02: 1 to 28
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- Example: LDO1, LDO2, LDO28
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- BUCKn
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- valid values for n are:
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- S2MPS11: 1 to 10
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- S2MPS13: 1 to 10
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- S2MPS14: 1 to 5
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- S2MPS15: 1 to 10
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- S2MPU02: 1 to 7
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- Example: BUCK1, BUCK2, BUCK9
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Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
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as per the datasheet of device.
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Optional properties of the nodes under "regulators" sub-node:
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- regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500,
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25000 (default) or 50000.
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Additionally S2MPS11 supports disabling ramp delay for BUCK{2,3,4,6}
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by setting it to <0>.
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Note: On S2MPS11 some bucks share the ramp rate setting i.e. same ramp value
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will be set for a particular group of bucks so provide the same
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regulator-ramp-delay value for them.
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Groups sharing ramp rate:
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- buck{1,6},
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- buck{3,4},
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- buck{7,8,10}.
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- samsung,ext-control-gpios: On S2MPS14 the LDO10, LDO11 and LDO12 can be
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configured to external control over GPIO. To turn this feature on this
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property must be added to the regulator sub-node:
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- samsung,ext-control-gpios: GPIO specifier for one GPIO
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controlling this regulator (enable/disable)
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Example:
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LDO12 {
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regulator-name = "V_EMMC_2.8V";
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regulator-min-microvolt = <2800000>;
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regulator-max-microvolt = <2800000>;
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samsung,ext-control-gpios = <&gpk0 2 0>;
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};
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Example:
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s2mps11_pmic@66 {
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compatible = "samsung,s2mps11-pmic";
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reg = <0x66>;
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regulators {
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ldo1_reg: LDO1 {
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regulator-name = "VDD_ABB_3.3V";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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ldo2_reg: LDO2 {
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regulator-name = "VDD_ALIVE_1.1V";
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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};
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buck2_reg: BUCK2 {
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regulator-name = "vdd_arm";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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regulator-ramp-delay = <50000>;
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};
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};
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};
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@ -9224,7 +9224,9 @@ F: drivers/clk/clk-s2mps11.c
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F: drivers/rtc/rtc-s5m.c
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F: include/linux/mfd/samsung/
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F: Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt
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F: Documentation/devicetree/bindings/mfd/s2mp*.txt
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F: Documentation/devicetree/bindings/mfd/samsung,sec-core.txt
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F: Documentation/devicetree/bindings/regulator/samsung,s2m*.txt
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F: Documentation/devicetree/bindings/clock/samsung,s2mps11.txt
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SAMSUNG S5P/EXYNOS4 SOC SERIES CAMERA SUBSYSTEM DRIVERS
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M: Kyungmin Park <kyungmin.park@samsung.com>
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