Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
Pull LED subsystem update from Bryan Wu: "We got some cleanup and driver for LP8860 as well as some patches for LED Flash Class" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: leds: lp8860: Fix module dependency leds: lp8860: Introduce TI lp8860 4 channel LED driver leds: Add support for setting brightness in a synchronous way leds: implement sysfs interface locking mechanism leds: syscon: handle multiple syscon instances leds: delete copy/paste mistake leds: regulator: Convert to devm_regulator_get_exclusivehifive-unleashed-5.1
Linus Torvalds
commit
2dbfca5a18
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@ -0,0 +1,29 @@
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* Texas Instruments - lp8860 4-Channel LED Driver
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The LP8860-Q1 is an high-efficiency LED
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driver with boost controller. It has 4 high-precision
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current sinks that can be controlled by a PWM input
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signal, a SPI/I2C master, or both.
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Required properties:
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- compatible:
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"ti,lp8860"
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- reg - I2C slave address
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- label - Used for naming LEDs
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Optional properties:
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- enable-gpio - gpio pin to enable/disable the device.
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- supply - "vled" - LED supply
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Example:
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leds: leds@6 {
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compatible = "ti,lp8860";
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reg = <0x2d>;
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label = "display_cluster";
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enable-gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>;
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vled-supply = <&vbatt>;
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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/product/lp8860-q1
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@ -250,6 +250,17 @@ config LEDS_LP8788
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help
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This option enables support for the Keyboard LEDs on the LP8788 PMIC.
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config LEDS_LP8860
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tristate "LED support for the TI LP8860 4 channel LED driver"
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depends on LEDS_CLASS && I2C
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select REGMAP_I2C
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help
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If you say yes here you get support for the TI LP8860 4 channel
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LED driver.
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This option enables support for the display cluster LEDs
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on the LP8860 4 channel LED driver using the I2C communication
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bus.
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config LEDS_CLEVO_MAIL
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tristate "Mail LED on Clevo notebook"
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depends on LEDS_CLASS
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@ -28,6 +28,7 @@ obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
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obj-$(CONFIG_LEDS_LP5562) += leds-lp5562.o
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obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o
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obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
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obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o
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obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
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obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
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obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
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@ -40,17 +40,27 @@ static ssize_t brightness_store(struct device *dev,
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{
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struct led_classdev *led_cdev = dev_get_drvdata(dev);
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unsigned long state;
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ssize_t ret = -EINVAL;
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ssize_t ret;
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mutex_lock(&led_cdev->led_access);
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if (led_sysfs_is_disabled(led_cdev)) {
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ret = -EBUSY;
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goto unlock;
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}
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ret = kstrtoul(buf, 10, &state);
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if (ret)
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return ret;
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goto unlock;
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if (state == LED_OFF)
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led_trigger_remove(led_cdev);
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__led_set_brightness(led_cdev, state);
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led_set_brightness(led_cdev, state);
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return size;
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ret = size;
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unlock:
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mutex_unlock(&led_cdev->led_access);
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return ret;
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}
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static DEVICE_ATTR_RW(brightness);
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@ -99,7 +109,7 @@ static void led_timer_function(unsigned long data)
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unsigned long delay;
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if (!led_cdev->blink_delay_on || !led_cdev->blink_delay_off) {
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__led_set_brightness(led_cdev, LED_OFF);
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led_set_brightness_async(led_cdev, LED_OFF);
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return;
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}
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@ -122,7 +132,7 @@ static void led_timer_function(unsigned long data)
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delay = led_cdev->blink_delay_off;
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}
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__led_set_brightness(led_cdev, brightness);
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led_set_brightness_async(led_cdev, brightness);
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/* Return in next iteration if led is in one-shot mode and we are in
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* the final blink state so that the led is toggled each delay_on +
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@ -148,7 +158,7 @@ static void set_brightness_delayed(struct work_struct *ws)
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led_stop_software_blink(led_cdev);
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__led_set_brightness(led_cdev, led_cdev->delayed_set_value);
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led_set_brightness_async(led_cdev, led_cdev->delayed_set_value);
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}
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/**
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@ -214,6 +224,7 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
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#ifdef CONFIG_LEDS_TRIGGERS
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init_rwsem(&led_cdev->trigger_lock);
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#endif
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mutex_init(&led_cdev->led_access);
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/* add to the list of leds */
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down_write(&leds_list_lock);
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list_add_tail(&led_cdev->node, &leds_list);
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@ -222,6 +233,8 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
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if (!led_cdev->max_brightness)
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led_cdev->max_brightness = LED_FULL;
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led_cdev->flags |= SET_BRIGHTNESS_ASYNC;
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led_update_brightness(led_cdev);
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INIT_WORK(&led_cdev->set_brightness_work, set_brightness_delayed);
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@ -267,6 +280,8 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
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down_write(&leds_list_lock);
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list_del(&led_cdev->node);
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up_write(&leds_list_lock);
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mutex_destroy(&led_cdev->led_access);
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}
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EXPORT_SYMBOL_GPL(led_classdev_unregister);
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@ -42,13 +42,13 @@ static void led_set_software_blink(struct led_classdev *led_cdev,
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/* never on - just set to off */
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if (!delay_on) {
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__led_set_brightness(led_cdev, LED_OFF);
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led_set_brightness_async(led_cdev, LED_OFF);
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return;
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}
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/* never off - just set to brightness */
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if (!delay_off) {
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__led_set_brightness(led_cdev, led_cdev->blink_brightness);
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led_set_brightness_async(led_cdev, led_cdev->blink_brightness);
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return;
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}
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@ -117,6 +117,8 @@ EXPORT_SYMBOL_GPL(led_stop_software_blink);
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void led_set_brightness(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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int ret = 0;
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/* delay brightness setting if need to stop soft-blink timer */
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if (led_cdev->blink_delay_on || led_cdev->blink_delay_off) {
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led_cdev->delayed_set_value = brightness;
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@ -124,7 +126,17 @@ void led_set_brightness(struct led_classdev *led_cdev,
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return;
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}
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__led_set_brightness(led_cdev, brightness);
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if (led_cdev->flags & SET_BRIGHTNESS_ASYNC) {
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led_set_brightness_async(led_cdev, brightness);
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return;
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} else if (led_cdev->flags & SET_BRIGHTNESS_SYNC)
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ret = led_set_brightness_sync(led_cdev, brightness);
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else
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ret = -EINVAL;
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if (ret < 0)
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dev_dbg(led_cdev->dev, "Setting LED brightness failed (%d)\n",
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ret);
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}
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EXPORT_SYMBOL(led_set_brightness);
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@ -143,3 +155,21 @@ int led_update_brightness(struct led_classdev *led_cdev)
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return ret;
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}
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EXPORT_SYMBOL(led_update_brightness);
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/* Caller must ensure led_cdev->led_access held */
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void led_sysfs_disable(struct led_classdev *led_cdev)
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{
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lockdep_assert_held(&led_cdev->led_access);
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led_cdev->flags |= LED_SYSFS_DISABLE;
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}
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EXPORT_SYMBOL_GPL(led_sysfs_disable);
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/* Caller must ensure led_cdev->led_access held */
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void led_sysfs_enable(struct led_classdev *led_cdev)
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{
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lockdep_assert_held(&led_cdev->led_access);
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led_cdev->flags &= ~LED_SYSFS_DISABLE;
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}
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EXPORT_SYMBOL_GPL(led_sysfs_enable);
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@ -37,6 +37,14 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
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char trigger_name[TRIG_NAME_MAX];
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struct led_trigger *trig;
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size_t len;
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int ret = count;
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mutex_lock(&led_cdev->led_access);
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if (led_sysfs_is_disabled(led_cdev)) {
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ret = -EBUSY;
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goto unlock;
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}
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trigger_name[sizeof(trigger_name) - 1] = '\0';
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strncpy(trigger_name, buf, sizeof(trigger_name) - 1);
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@ -47,7 +55,7 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
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if (!strcmp(trigger_name, "none")) {
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led_trigger_remove(led_cdev);
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return count;
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goto unlock;
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}
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down_read(&triggers_list_lock);
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@ -58,12 +66,14 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
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up_write(&led_cdev->trigger_lock);
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up_read(&triggers_list_lock);
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return count;
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goto unlock;
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}
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}
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up_read(&triggers_list_lock);
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return -EINVAL;
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unlock:
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mutex_unlock(&led_cdev->led_access);
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return ret;
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}
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EXPORT_SYMBOL_GPL(led_trigger_store);
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@ -0,0 +1,491 @@
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/*
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* TI LP8860 4-Channel LED Driver
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*
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* Copyright (C) 2014 Texas Instruments
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*
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* Author: Dan Murphy <dmurphy@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*/
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/slab.h>
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#define LP8860_DISP_CL1_BRT_MSB 0x00
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#define LP8860_DISP_CL1_BRT_LSB 0x01
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#define LP8860_DISP_CL1_CURR_MSB 0x02
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#define LP8860_DISP_CL1_CURR_LSB 0x03
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#define LP8860_CL2_BRT_MSB 0x04
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#define LP8860_CL2_BRT_LSB 0x05
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#define LP8860_CL2_CURRENT 0x06
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#define LP8860_CL3_BRT_MSB 0x07
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#define LP8860_CL3_BRT_LSB 0x08
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#define LP8860_CL3_CURRENT 0x09
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#define LP8860_CL4_BRT_MSB 0x0a
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#define LP8860_CL4_BRT_LSB 0x0b
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#define LP8860_CL4_CURRENT 0x0c
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#define LP8860_CONFIG 0x0d
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#define LP8860_STATUS 0x0e
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#define LP8860_FAULT 0x0f
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#define LP8860_LED_FAULT 0x10
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#define LP8860_FAULT_CLEAR 0x11
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#define LP8860_ID 0x12
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||||
#define LP8860_TEMP_MSB 0x13
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#define LP8860_TEMP_LSB 0x14
|
||||
#define LP8860_DISP_LED_CURR_MSB 0x15
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||||
#define LP8860_DISP_LED_CURR_LSB 0x16
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||||
#define LP8860_DISP_LED_PWM_MSB 0x17
|
||||
#define LP8860_DISP_LED_PWM_LSB 0x18
|
||||
#define LP8860_EEPROM_CNTRL 0x19
|
||||
#define LP8860_EEPROM_UNLOCK 0x1a
|
||||
|
||||
#define LP8860_EEPROM_REG_0 0x60
|
||||
#define LP8860_EEPROM_REG_1 0x61
|
||||
#define LP8860_EEPROM_REG_2 0x62
|
||||
#define LP8860_EEPROM_REG_3 0x63
|
||||
#define LP8860_EEPROM_REG_4 0x64
|
||||
#define LP8860_EEPROM_REG_5 0x65
|
||||
#define LP8860_EEPROM_REG_6 0x66
|
||||
#define LP8860_EEPROM_REG_7 0x67
|
||||
#define LP8860_EEPROM_REG_8 0x68
|
||||
#define LP8860_EEPROM_REG_9 0x69
|
||||
#define LP8860_EEPROM_REG_10 0x6a
|
||||
#define LP8860_EEPROM_REG_11 0x6b
|
||||
#define LP8860_EEPROM_REG_12 0x6c
|
||||
#define LP8860_EEPROM_REG_13 0x6d
|
||||
#define LP8860_EEPROM_REG_14 0x6e
|
||||
#define LP8860_EEPROM_REG_15 0x6f
|
||||
#define LP8860_EEPROM_REG_16 0x70
|
||||
#define LP8860_EEPROM_REG_17 0x71
|
||||
#define LP8860_EEPROM_REG_18 0x72
|
||||
#define LP8860_EEPROM_REG_19 0x73
|
||||
#define LP8860_EEPROM_REG_20 0x74
|
||||
#define LP8860_EEPROM_REG_21 0x75
|
||||
#define LP8860_EEPROM_REG_22 0x76
|
||||
#define LP8860_EEPROM_REG_23 0x77
|
||||
#define LP8860_EEPROM_REG_24 0x78
|
||||
|
||||
#define LP8860_LOCK_EEPROM 0x00
|
||||
#define LP8860_UNLOCK_EEPROM 0x01
|
||||
#define LP8860_PROGRAM_EEPROM 0x02
|
||||
#define LP8860_EEPROM_CODE_1 0x08
|
||||
#define LP8860_EEPROM_CODE_2 0xba
|
||||
#define LP8860_EEPROM_CODE_3 0xef
|
||||
|
||||
#define LP8860_CLEAR_FAULTS 0x01
|
||||
|
||||
#define LP8860_DISP_LED_NAME "display_cluster"
|
||||
|
||||
/**
|
||||
* struct lp8860_led -
|
||||
* @lock - Lock for reading/writing the device
|
||||
* @work - Work item used to off load the brightness register writes
|
||||
* @client - Pointer to the I2C client
|
||||
* @led_dev - led class device pointer
|
||||
* @regmap - Devices register map
|
||||
* @eeprom_regmap - EEPROM register map
|
||||
* @enable_gpio - VDDIO/EN gpio to enable communication interface
|
||||
* @regulator - LED supply regulator pointer
|
||||
* @brightness - Current brightness value requested
|
||||
* @label - LED label
|
||||
**/
|
||||
struct lp8860_led {
|
||||
struct mutex lock;
|
||||
struct work_struct work;
|
||||
struct i2c_client *client;
|
||||
struct led_classdev led_dev;
|
||||
struct regmap *regmap;
|
||||
struct regmap *eeprom_regmap;
|
||||
struct gpio_desc *enable_gpio;
|
||||
struct regulator *regulator;
|
||||
enum led_brightness brightness;
|
||||
const char *label;
|
||||
};
|
||||
|
||||
struct lp8860_eeprom_reg {
|
||||
uint8_t reg;
|
||||
uint8_t value;
|
||||
};
|
||||
|
||||
static struct lp8860_eeprom_reg lp8860_eeprom_disp_regs[] = {
|
||||
{ LP8860_EEPROM_REG_0, 0xed },
|
||||
{ LP8860_EEPROM_REG_1, 0xdf },
|
||||
{ LP8860_EEPROM_REG_2, 0xdc },
|
||||
{ LP8860_EEPROM_REG_3, 0xf0 },
|
||||
{ LP8860_EEPROM_REG_4, 0xdf },
|
||||
{ LP8860_EEPROM_REG_5, 0xe5 },
|
||||
{ LP8860_EEPROM_REG_6, 0xf2 },
|
||||
{ LP8860_EEPROM_REG_7, 0x77 },
|
||||
{ LP8860_EEPROM_REG_8, 0x77 },
|
||||
{ LP8860_EEPROM_REG_9, 0x71 },
|
||||
{ LP8860_EEPROM_REG_10, 0x3f },
|
||||
{ LP8860_EEPROM_REG_11, 0xb7 },
|
||||
{ LP8860_EEPROM_REG_12, 0x17 },
|
||||
{ LP8860_EEPROM_REG_13, 0xef },
|
||||
{ LP8860_EEPROM_REG_14, 0xb0 },
|
||||
{ LP8860_EEPROM_REG_15, 0x87 },
|
||||
{ LP8860_EEPROM_REG_16, 0xce },
|
||||
{ LP8860_EEPROM_REG_17, 0x72 },
|
||||
{ LP8860_EEPROM_REG_18, 0xe5 },
|
||||
{ LP8860_EEPROM_REG_19, 0xdf },
|
||||
{ LP8860_EEPROM_REG_20, 0x35 },
|
||||
{ LP8860_EEPROM_REG_21, 0x06 },
|
||||
{ LP8860_EEPROM_REG_22, 0xdc },
|
||||
{ LP8860_EEPROM_REG_23, 0x88 },
|
||||
{ LP8860_EEPROM_REG_24, 0x3E },
|
||||
};
|
||||
|
||||
static int lp8860_unlock_eeprom(struct lp8860_led *led, int lock)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&led->lock);
|
||||
|
||||
if (lock == LP8860_UNLOCK_EEPROM) {
|
||||
ret = regmap_write(led->regmap,
|
||||
LP8860_EEPROM_UNLOCK,
|
||||
LP8860_EEPROM_CODE_1);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "EEPROM Unlock failed\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = regmap_write(led->regmap,
|
||||
LP8860_EEPROM_UNLOCK,
|
||||
LP8860_EEPROM_CODE_2);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "EEPROM Unlock failed\n");
|
||||
goto out;
|
||||
}
|
||||
ret = regmap_write(led->regmap,
|
||||
LP8860_EEPROM_UNLOCK,
|
||||
LP8860_EEPROM_CODE_3);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "EEPROM Unlock failed\n");
|
||||
goto out;
|
||||
}
|
||||
} else {
|
||||
ret = regmap_write(led->regmap,
|
||||
LP8860_EEPROM_UNLOCK,
|
||||
LP8860_LOCK_EEPROM);
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&led->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lp8860_fault_check(struct lp8860_led *led)
|
||||
{
|
||||
int ret, fault;
|
||||
unsigned int read_buf;
|
||||
|
||||
ret = regmap_read(led->regmap, LP8860_LED_FAULT, &read_buf);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
fault = read_buf;
|
||||
|
||||
ret = regmap_read(led->regmap, LP8860_FAULT, &read_buf);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
fault |= read_buf;
|
||||
|
||||
/* Attempt to clear any faults */
|
||||
if (fault)
|
||||
ret = regmap_write(led->regmap, LP8860_FAULT_CLEAR,
|
||||
LP8860_CLEAR_FAULTS);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void lp8860_led_brightness_work(struct work_struct *work)
|
||||
{
|
||||
struct lp8860_led *led = container_of(work, struct lp8860_led, work);
|
||||
int ret;
|
||||
int disp_brightness = led->brightness * 255;
|
||||
|
||||
mutex_lock(&led->lock);
|
||||
|
||||
ret = lp8860_fault_check(led);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "Cannot read/clear faults\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_MSB,
|
||||
(disp_brightness & 0xff00) >> 8);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "Cannot write CL1 MSB\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_LSB,
|
||||
disp_brightness & 0xff);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "Cannot write CL1 LSB\n");
|
||||
goto out;
|
||||
}
|
||||
out:
|
||||
mutex_unlock(&led->lock);
|
||||
}
|
||||
|
||||
static void lp8860_brightness_set(struct led_classdev *led_cdev,
|
||||
enum led_brightness brt_val)
|
||||
{
|
||||
struct lp8860_led *led =
|
||||
container_of(led_cdev, struct lp8860_led, led_dev);
|
||||
|
||||
led->brightness = brt_val;
|
||||
schedule_work(&led->work);
|
||||
}
|
||||
|
||||
static int lp8860_init(struct lp8860_led *led)
|
||||
{
|
||||
unsigned int read_buf;
|
||||
int ret, i, reg_count;
|
||||
|
||||
if (led->enable_gpio)
|
||||
gpiod_direction_output(led->enable_gpio, 1);
|
||||
|
||||
ret = lp8860_fault_check(led);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = regmap_read(led->regmap, LP8860_STATUS, &read_buf);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = lp8860_unlock_eeprom(led, LP8860_UNLOCK_EEPROM);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "Failed unlocking EEPROM\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs) / sizeof(lp8860_eeprom_disp_regs[0]);
|
||||
for (i = 0; i < reg_count; i++) {
|
||||
ret = regmap_write(led->eeprom_regmap,
|
||||
lp8860_eeprom_disp_regs[i].reg,
|
||||
lp8860_eeprom_disp_regs[i].value);
|
||||
if (ret) {
|
||||
dev_err(&led->client->dev, "Failed writing EEPROM\n");
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
ret = lp8860_unlock_eeprom(led, LP8860_LOCK_EEPROM);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = regmap_write(led->regmap,
|
||||
LP8860_EEPROM_CNTRL,
|
||||
LP8860_PROGRAM_EEPROM);
|
||||
if (ret)
|
||||
dev_err(&led->client->dev, "Failed programming EEPROM\n");
|
||||
out:
|
||||
if (ret)
|
||||
if (led->enable_gpio)
|
||||
gpiod_direction_output(led->enable_gpio, 0);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct reg_default lp8860_reg_defs[] = {
|
||||
{ LP8860_DISP_CL1_BRT_MSB, 0x00},
|
||||
{ LP8860_DISP_CL1_BRT_LSB, 0x00},
|
||||
{ LP8860_DISP_CL1_CURR_MSB, 0x00},
|
||||
{ LP8860_DISP_CL1_CURR_LSB, 0x00},
|
||||
{ LP8860_CL2_BRT_MSB, 0x00},
|
||||
{ LP8860_CL2_BRT_LSB, 0x00},
|
||||
{ LP8860_CL2_CURRENT, 0x00},
|
||||
{ LP8860_CL3_BRT_MSB, 0x00},
|
||||
{ LP8860_CL3_BRT_LSB, 0x00},
|
||||
{ LP8860_CL3_CURRENT, 0x00},
|
||||
{ LP8860_CL4_BRT_MSB, 0x00},
|
||||
{ LP8860_CL4_BRT_LSB, 0x00},
|
||||
{ LP8860_CL4_CURRENT, 0x00},
|
||||
{ LP8860_CONFIG, 0x00},
|
||||
{ LP8860_FAULT_CLEAR, 0x00},
|
||||
{ LP8860_EEPROM_CNTRL, 0x80},
|
||||
{ LP8860_EEPROM_UNLOCK, 0x00},
|
||||
};
|
||||
|
||||
static const struct regmap_config lp8860_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
|
||||
.max_register = LP8860_EEPROM_UNLOCK,
|
||||
.reg_defaults = lp8860_reg_defs,
|
||||
.num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs),
|
||||
.cache_type = REGCACHE_NONE,
|
||||
};
|
||||
|
||||
static struct reg_default lp8860_eeprom_defs[] = {
|
||||
{ LP8860_EEPROM_REG_0, 0x00 },
|
||||
{ LP8860_EEPROM_REG_1, 0x00 },
|
||||
{ LP8860_EEPROM_REG_2, 0x00 },
|
||||
{ LP8860_EEPROM_REG_3, 0x00 },
|
||||
{ LP8860_EEPROM_REG_4, 0x00 },
|
||||
{ LP8860_EEPROM_REG_5, 0x00 },
|
||||
{ LP8860_EEPROM_REG_6, 0x00 },
|
||||
{ LP8860_EEPROM_REG_7, 0x00 },
|
||||
{ LP8860_EEPROM_REG_8, 0x00 },
|
||||
{ LP8860_EEPROM_REG_9, 0x00 },
|
||||
{ LP8860_EEPROM_REG_10, 0x00 },
|
||||
{ LP8860_EEPROM_REG_11, 0x00 },
|
||||
{ LP8860_EEPROM_REG_12, 0x00 },
|
||||
{ LP8860_EEPROM_REG_13, 0x00 },
|
||||
{ LP8860_EEPROM_REG_14, 0x00 },
|
||||
{ LP8860_EEPROM_REG_15, 0x00 },
|
||||
{ LP8860_EEPROM_REG_16, 0x00 },
|
||||
{ LP8860_EEPROM_REG_17, 0x00 },
|
||||
{ LP8860_EEPROM_REG_18, 0x00 },
|
||||
{ LP8860_EEPROM_REG_19, 0x00 },
|
||||
{ LP8860_EEPROM_REG_20, 0x00 },
|
||||
{ LP8860_EEPROM_REG_21, 0x00 },
|
||||
{ LP8860_EEPROM_REG_22, 0x00 },
|
||||
{ LP8860_EEPROM_REG_23, 0x00 },
|
||||
{ LP8860_EEPROM_REG_24, 0x00 },
|
||||
};
|
||||
|
||||
static const struct regmap_config lp8860_eeprom_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
|
||||
.max_register = LP8860_EEPROM_REG_24,
|
||||
.reg_defaults = lp8860_eeprom_defs,
|
||||
.num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs),
|
||||
.cache_type = REGCACHE_NONE,
|
||||
};
|
||||
|
||||
static int lp8860_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
int ret;
|
||||
struct lp8860_led *led;
|
||||
struct device_node *np = client->dev.of_node;
|
||||
|
||||
led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
|
||||
if (!led)
|
||||
return -ENOMEM;
|
||||
|
||||
led->label = LP8860_DISP_LED_NAME;
|
||||
|
||||
if (client->dev.of_node) {
|
||||
ret = of_property_read_string(np, "label", &led->label);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "Missing label in dt\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
led->enable_gpio = devm_gpiod_get(&client->dev, "enable");
|
||||
if (IS_ERR(led->enable_gpio))
|
||||
led->enable_gpio = NULL;
|
||||
else
|
||||
gpiod_direction_output(led->enable_gpio, 0);
|
||||
|
||||
led->regulator = devm_regulator_get(&client->dev, "vled");
|
||||
if (IS_ERR(led->regulator))
|
||||
led->regulator = NULL;
|
||||
|
||||
led->client = client;
|
||||
led->led_dev.name = led->label;
|
||||
led->led_dev.max_brightness = LED_FULL;
|
||||
led->led_dev.brightness_set = lp8860_brightness_set;
|
||||
|
||||
mutex_init(&led->lock);
|
||||
INIT_WORK(&led->work, lp8860_led_brightness_work);
|
||||
|
||||
i2c_set_clientdata(client, led);
|
||||
|
||||
led->regmap = devm_regmap_init_i2c(client, &lp8860_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;
|
||||
}
|
||||
|
||||
led->eeprom_regmap = devm_regmap_init_i2c(client, &lp8860_eeprom_regmap_config);
|
||||
if (IS_ERR(led->eeprom_regmap)) {
|
||||
ret = PTR_ERR(led->eeprom_regmap);
|
||||
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
||||
ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = lp8860_init(led);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = led_classdev_register(&client->dev, &led->led_dev);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "led register err: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int lp8860_remove(struct i2c_client *client)
|
||||
{
|
||||
struct lp8860_led *led = i2c_get_clientdata(client);
|
||||
int ret;
|
||||
|
||||
led_classdev_unregister(&led->led_dev);
|
||||
cancel_work_sync(&led->work);
|
||||
|
||||
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");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id lp8860_id[] = {
|
||||
{ "lp8860", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, lp8860_id);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id of_lp8860_leds_match[] = {
|
||||
{ .compatible = "ti,lp8860", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, of_lp8860_leds_match);
|
||||
#endif
|
||||
|
||||
static struct i2c_driver lp8860_driver = {
|
||||
.driver = {
|
||||
.name = "lp8860",
|
||||
.of_match_table = of_match_ptr(of_lp8860_leds_match),
|
||||
},
|
||||
.probe = lp8860_probe,
|
||||
.remove = lp8860_remove,
|
||||
.id_table = lp8860_id,
|
||||
};
|
||||
module_i2c_driver(lp8860_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Texas Instruments LP8860 LED drvier");
|
||||
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -153,24 +153,21 @@ static int regulator_led_probe(struct platform_device *pdev)
|
|||
return -ENODEV;
|
||||
}
|
||||
|
||||
vcc = regulator_get_exclusive(&pdev->dev, "vled");
|
||||
vcc = devm_regulator_get_exclusive(&pdev->dev, "vled");
|
||||
if (IS_ERR(vcc)) {
|
||||
dev_err(&pdev->dev, "Cannot get vcc for %s\n", pdata->name);
|
||||
return PTR_ERR(vcc);
|
||||
}
|
||||
|
||||
led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
|
||||
if (led == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto err_vcc;
|
||||
}
|
||||
if (led == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
led->cdev.max_brightness = led_regulator_get_max_brightness(vcc);
|
||||
if (pdata->brightness > led->cdev.max_brightness) {
|
||||
dev_err(&pdev->dev, "Invalid default brightness %d\n",
|
||||
pdata->brightness);
|
||||
ret = -EINVAL;
|
||||
goto err_vcc;
|
||||
return -EINVAL;
|
||||
}
|
||||
led->value = pdata->brightness;
|
||||
|
||||
|
|
@ -191,7 +188,7 @@ static int regulator_led_probe(struct platform_device *pdev)
|
|||
ret = led_classdev_register(&pdev->dev, &led->cdev);
|
||||
if (ret < 0) {
|
||||
cancel_work_sync(&led->work);
|
||||
goto err_vcc;
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* to expose the default value to userspace */
|
||||
|
|
@ -201,10 +198,6 @@ static int regulator_led_probe(struct platform_device *pdev)
|
|||
regulator_led_set_value(led);
|
||||
|
||||
return 0;
|
||||
|
||||
err_vcc:
|
||||
regulator_put(vcc);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int regulator_led_remove(struct platform_device *pdev)
|
||||
|
|
@ -214,7 +207,6 @@ static int regulator_led_remove(struct platform_device *pdev)
|
|||
led_classdev_unregister(&led->cdev);
|
||||
cancel_work_sync(&led->work);
|
||||
regulator_led_disable(led);
|
||||
regulator_put(led->vcc);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -18,10 +18,6 @@
|
|||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* This driver provides system reboot functionality for APM X-Gene SoC.
|
||||
* For system shutdown, this is board specify. If a board designer
|
||||
* implements GPIO shutdown, use the gpio-poweroff.c driver.
|
||||
*/
|
||||
#include <linux/io.h>
|
||||
#include <linux/of_device.h>
|
||||
|
|
@ -70,39 +66,13 @@ static void syscon_led_set(struct led_classdev *led_cdev,
|
|||
dev_err(sled->cdev.dev, "error updating LED status\n");
|
||||
}
|
||||
|
||||
static const struct of_device_id syscon_match[] = {
|
||||
{ .compatible = "syscon", },
|
||||
{},
|
||||
};
|
||||
|
||||
static int __init syscon_leds_init(void)
|
||||
static int __init syscon_leds_spawn(struct device_node *np,
|
||||
struct device *dev,
|
||||
struct regmap *map)
|
||||
{
|
||||
const struct of_device_id *devid;
|
||||
struct device_node *np;
|
||||
struct device_node *child;
|
||||
struct regmap *map;
|
||||
struct platform_device *pdev;
|
||||
struct device *dev;
|
||||
int ret;
|
||||
|
||||
np = of_find_matching_node_and_match(NULL, syscon_match,
|
||||
&devid);
|
||||
if (!np)
|
||||
return -ENODEV;
|
||||
|
||||
map = syscon_node_to_regmap(np);
|
||||
if (IS_ERR(map))
|
||||
return PTR_ERR(map);
|
||||
|
||||
/*
|
||||
* If the map is there, the device should be there, we allocate
|
||||
* memory on the syscon device's behalf here.
|
||||
*/
|
||||
pdev = of_find_device_by_node(np);
|
||||
if (!pdev)
|
||||
return -ENODEV;
|
||||
dev = &pdev->dev;
|
||||
|
||||
for_each_available_child_of_node(np, child) {
|
||||
struct syscon_led *sled;
|
||||
const char *state;
|
||||
|
|
@ -150,7 +120,6 @@ static int __init syscon_leds_init(void)
|
|||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
}
|
||||
sled->cdev.brightness_set = syscon_led_set;
|
||||
|
||||
|
|
@ -160,7 +129,39 @@ static int __init syscon_leds_init(void)
|
|||
|
||||
dev_info(dev, "registered LED %s\n", sled->cdev.name);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
static int __init syscon_leds_init(void)
|
||||
{
|
||||
struct device_node *np;
|
||||
|
||||
for_each_of_allnodes(np) {
|
||||
struct platform_device *pdev;
|
||||
struct regmap *map;
|
||||
int ret;
|
||||
|
||||
if (!of_device_is_compatible(np, "syscon"))
|
||||
continue;
|
||||
|
||||
map = syscon_node_to_regmap(np);
|
||||
if (IS_ERR(map)) {
|
||||
pr_err("error getting regmap for syscon LEDs\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* If the map is there, the device should be there, we allocate
|
||||
* memory on the syscon device's behalf here.
|
||||
*/
|
||||
pdev = of_find_device_by_node(np);
|
||||
if (!pdev)
|
||||
return -ENODEV;
|
||||
ret = syscon_leds_spawn(np, &pdev->dev, map);
|
||||
if (ret)
|
||||
dev_err(&pdev->dev, "could not spawn syscon LEDs\n");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
device_initcall(syscon_leds_init);
|
||||
|
|
|
|||
|
|
@ -17,16 +17,28 @@
|
|||
#include <linux/rwsem.h>
|
||||
#include <linux/leds.h>
|
||||
|
||||
static inline void __led_set_brightness(struct led_classdev *led_cdev,
|
||||
static inline void led_set_brightness_async(struct led_classdev *led_cdev,
|
||||
enum led_brightness value)
|
||||
{
|
||||
if (value > led_cdev->max_brightness)
|
||||
value = led_cdev->max_brightness;
|
||||
led_cdev->brightness = value;
|
||||
led_cdev->brightness = min(value, led_cdev->max_brightness);
|
||||
|
||||
if (!(led_cdev->flags & LED_SUSPENDED))
|
||||
led_cdev->brightness_set(led_cdev, value);
|
||||
}
|
||||
|
||||
static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
|
||||
enum led_brightness value)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
led_cdev->brightness = min(value, led_cdev->max_brightness);
|
||||
|
||||
if (!(led_cdev->flags & LED_SUSPENDED))
|
||||
ret = led_cdev->brightness_set_sync(led_cdev,
|
||||
led_cdev->brightness);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int led_get_brightness(struct led_classdev *led_cdev)
|
||||
{
|
||||
return led_cdev->brightness;
|
||||
|
|
|
|||
|
|
@ -51,9 +51,9 @@ static int fb_notifier_callback(struct notifier_block *p,
|
|||
|
||||
if ((n->old_status == UNBLANK) ^ n->invert) {
|
||||
n->brightness = led->brightness;
|
||||
__led_set_brightness(led, LED_OFF);
|
||||
led_set_brightness_async(led, LED_OFF);
|
||||
} else {
|
||||
__led_set_brightness(led, n->brightness);
|
||||
led_set_brightness_async(led, n->brightness);
|
||||
}
|
||||
|
||||
n->old_status = new_status;
|
||||
|
|
@ -89,9 +89,9 @@ static ssize_t bl_trig_invert_store(struct device *dev,
|
|||
|
||||
/* After inverting, we need to update the LED. */
|
||||
if ((n->old_status == BLANK) ^ n->invert)
|
||||
__led_set_brightness(led, LED_OFF);
|
||||
led_set_brightness_async(led, LED_OFF);
|
||||
else
|
||||
__led_set_brightness(led, n->brightness);
|
||||
led_set_brightness_async(led, n->brightness);
|
||||
|
||||
return num;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -19,7 +19,7 @@
|
|||
|
||||
static void defon_trig_activate(struct led_classdev *led_cdev)
|
||||
{
|
||||
__led_set_brightness(led_cdev, led_cdev->max_brightness);
|
||||
led_set_brightness_async(led_cdev, led_cdev->max_brightness);
|
||||
}
|
||||
|
||||
static struct led_trigger defon_led_trigger = {
|
||||
|
|
|
|||
|
|
@ -54,12 +54,12 @@ static void gpio_trig_work(struct work_struct *work)
|
|||
|
||||
if (tmp) {
|
||||
if (gpio_data->desired_brightness)
|
||||
__led_set_brightness(gpio_data->led,
|
||||
led_set_brightness_async(gpio_data->led,
|
||||
gpio_data->desired_brightness);
|
||||
else
|
||||
__led_set_brightness(gpio_data->led, LED_FULL);
|
||||
led_set_brightness_async(gpio_data->led, LED_FULL);
|
||||
} else {
|
||||
__led_set_brightness(gpio_data->led, LED_OFF);
|
||||
led_set_brightness_async(gpio_data->led, LED_OFF);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -74,7 +74,7 @@ static void led_heartbeat_function(unsigned long data)
|
|||
break;
|
||||
}
|
||||
|
||||
__led_set_brightness(led_cdev, brightness);
|
||||
led_set_brightness_async(led_cdev, brightness);
|
||||
mod_timer(&heartbeat_data->timer, jiffies + delay);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -63,9 +63,9 @@ static ssize_t led_invert_store(struct device *dev,
|
|||
oneshot_data->invert = !!state;
|
||||
|
||||
if (oneshot_data->invert)
|
||||
__led_set_brightness(led_cdev, LED_FULL);
|
||||
led_set_brightness_async(led_cdev, LED_FULL);
|
||||
else
|
||||
__led_set_brightness(led_cdev, LED_OFF);
|
||||
led_set_brightness_async(led_cdev, LED_OFF);
|
||||
|
||||
return size;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -41,7 +41,7 @@ static void transient_timer_function(unsigned long data)
|
|||
struct transient_trig_data *transient_data = led_cdev->trigger_data;
|
||||
|
||||
transient_data->activate = 0;
|
||||
__led_set_brightness(led_cdev, transient_data->restore_state);
|
||||
led_set_brightness_async(led_cdev, transient_data->restore_state);
|
||||
}
|
||||
|
||||
static ssize_t transient_activate_show(struct device *dev,
|
||||
|
|
@ -72,7 +72,8 @@ static ssize_t transient_activate_store(struct device *dev,
|
|||
if (state == 0 && transient_data->activate == 1) {
|
||||
del_timer(&transient_data->timer);
|
||||
transient_data->activate = state;
|
||||
__led_set_brightness(led_cdev, transient_data->restore_state);
|
||||
led_set_brightness_async(led_cdev,
|
||||
transient_data->restore_state);
|
||||
return size;
|
||||
}
|
||||
|
||||
|
|
@ -80,7 +81,7 @@ static ssize_t transient_activate_store(struct device *dev,
|
|||
if (state == 1 && transient_data->activate == 0 &&
|
||||
transient_data->duration != 0) {
|
||||
transient_data->activate = state;
|
||||
__led_set_brightness(led_cdev, transient_data->state);
|
||||
led_set_brightness_async(led_cdev, transient_data->state);
|
||||
transient_data->restore_state =
|
||||
(transient_data->state == LED_FULL) ? LED_OFF : LED_FULL;
|
||||
mod_timer(&transient_data->timer,
|
||||
|
|
@ -203,7 +204,8 @@ static void transient_trig_deactivate(struct led_classdev *led_cdev)
|
|||
|
||||
if (led_cdev->activated) {
|
||||
del_timer_sync(&transient_data->timer);
|
||||
__led_set_brightness(led_cdev, transient_data->restore_state);
|
||||
led_set_brightness_async(led_cdev,
|
||||
transient_data->restore_state);
|
||||
device_remove_file(led_cdev->dev, &dev_attr_activate);
|
||||
device_remove_file(led_cdev->dev, &dev_attr_duration);
|
||||
device_remove_file(led_cdev->dev, &dev_attr_state);
|
||||
|
|
|
|||
|
|
@ -13,6 +13,7 @@
|
|||
#define __LINUX_LEDS_H_INCLUDED
|
||||
|
||||
#include <linux/list.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/rwsem.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/timer.h>
|
||||
|
|
@ -42,11 +43,20 @@ struct led_classdev {
|
|||
#define LED_BLINK_ONESHOT (1 << 17)
|
||||
#define LED_BLINK_ONESHOT_STOP (1 << 18)
|
||||
#define LED_BLINK_INVERT (1 << 19)
|
||||
#define LED_SYSFS_DISABLE (1 << 20)
|
||||
#define SET_BRIGHTNESS_ASYNC (1 << 21)
|
||||
#define SET_BRIGHTNESS_SYNC (1 << 22)
|
||||
|
||||
/* Set LED brightness level */
|
||||
/* Must not sleep, use a workqueue if needed */
|
||||
void (*brightness_set)(struct led_classdev *led_cdev,
|
||||
enum led_brightness brightness);
|
||||
/*
|
||||
* Set LED brightness level immediately - it can block the caller for
|
||||
* the time required for accessing a LED device register.
|
||||
*/
|
||||
int (*brightness_set_sync)(struct led_classdev *led_cdev,
|
||||
enum led_brightness brightness);
|
||||
/* Get LED brightness level */
|
||||
enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
|
||||
|
||||
|
|
@ -85,6 +95,9 @@ struct led_classdev {
|
|||
/* true if activated - deactivate routine uses it to do cleanup */
|
||||
bool activated;
|
||||
#endif
|
||||
|
||||
/* Ensures consistent access to the LED Flash Class device */
|
||||
struct mutex led_access;
|
||||
};
|
||||
|
||||
extern int led_classdev_register(struct device *parent,
|
||||
|
|
@ -151,6 +164,33 @@ extern void led_set_brightness(struct led_classdev *led_cdev,
|
|||
*/
|
||||
extern int led_update_brightness(struct led_classdev *led_cdev);
|
||||
|
||||
/**
|
||||
* led_sysfs_disable - disable LED sysfs interface
|
||||
* @led_cdev: the LED to set
|
||||
*
|
||||
* Disable the led_cdev's sysfs interface.
|
||||
*/
|
||||
extern void led_sysfs_disable(struct led_classdev *led_cdev);
|
||||
|
||||
/**
|
||||
* led_sysfs_enable - enable LED sysfs interface
|
||||
* @led_cdev: the LED to set
|
||||
*
|
||||
* Enable the led_cdev's sysfs interface.
|
||||
*/
|
||||
extern void led_sysfs_enable(struct led_classdev *led_cdev);
|
||||
|
||||
/**
|
||||
* led_sysfs_is_disabled - check if LED sysfs interface is disabled
|
||||
* @led_cdev: the LED to query
|
||||
*
|
||||
* Returns: true if the led_cdev's sysfs interface is disabled.
|
||||
*/
|
||||
static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
|
||||
{
|
||||
return led_cdev->flags & LED_SYSFS_DISABLE;
|
||||
}
|
||||
|
||||
/*
|
||||
* LED Triggers
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in New Issue