leds: da903x: Add support for LEDs found on DA9030/DA9034 (9e84561c) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/leds/Kconfig

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		@@ -157,6 +157,13 @@ config LEDS_PCA955X
		LED driver chips accessed via the I2C bus. Supported
		devices include PCA9550, PCA9551, PCA9552, and PCA9553.

		config LEDS_DA903X
		tristate "LED Support for DA9030/DA9034 PMIC"
		depends on LEDS_CLASS && PMIC_DA903X
		help
		This option enables support for on-chip LED drivers found
		on Dialog Semiconductor DA9030/DA9034 PMICs.

		comment "LED Triggers"

		config LEDS_TRIGGERS

drivers/leds/Makefile

+1 −0

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		@@ -22,6 +22,7 @@ obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
		obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
		obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
		obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
		obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o

		# LED Triggers
		obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o

drivers/leds/leds-da903x.c

0 → 100644

+175 −0

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		/*
		* LEDs driver for Dialog Semiconductor DA9030/DA9034
		*
		* Copyright (C) 2008 Compulab, Ltd.
		* Mike Rapoport <mike@compulab.co.il>
		*
		* Copyright (C) 2006-2008 Marvell International Ltd.
		* Eric Miao <eric.miao@marvell.com>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/init.h>
		#include <linux/platform_device.h>
		#include <linux/leds.h>
		#include <linux/mfd/da903x.h>

		#define DA9030_LED1_CONTROL 0x20
		#define DA9030_LED2_CONTROL 0x21
		#define DA9030_LED3_CONTROL 0x22
		#define DA9030_LED4_CONTROL 0x23
		#define DA9030_LEDPC_CONTROL 0x24
		#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */

		#define DA9034_LED1_CONTROL 0x35
		#define DA9034_LED2_CONTROL 0x36
		#define DA9034_VIBRA 0x40

		struct da903x_led {
		struct led_classdev cdev;
		struct work_struct work;
		struct device *master;
		enum led_brightness new_brightness;
		int id;
		int flags;
		};

		#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
		#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)

		static void da903x_led_work(struct work_struct *work)
		{
		struct da903x_led *led = container_of(work, struct da903x_led, work);
		uint8_t val;
		int offset;

		switch (led->id) {
		case DA9030_ID_LED_1:
		case DA9030_ID_LED_2:
		case DA9030_ID_LED_3:
		case DA9030_ID_LED_4:
		case DA9030_ID_LED_PC:
		offset = DA9030_LED_OFFSET(led->id);
		val = led->flags & ~0x87;
		val \|= (led->new_brightness) ? 0x80 : 0; /* EN bit */
		val \|= (led->new_brightness >> 5) & 0x7; /* PWM<2:0> */
		da903x_write(led->master, DA9030_LED1_CONTROL + offset, val);
		break;
		case DA9030_ID_VIBRA:
		val = led->flags & ~0x80;
		val \|= (led->new_brightness) ? 0x80 : 0; /* EN bit */
		da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
		break;
		case DA9034_ID_LED_1:
		case DA9034_ID_LED_2:
		offset = DA9034_LED_OFFSET(led->id);
		val = (led->new_brightness * 0x5f / LED_FULL) & 0x7f;
		val \|= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
		da903x_write(led->master, DA9034_LED1_CONTROL + offset, val);
		break;
		case DA9034_ID_VIBRA:
		val = led->new_brightness & 0xfe;
		da903x_write(led->master, DA9034_VIBRA, val);
		break;
		}
		}

		static void da903x_led_set(struct led_classdev *led_cdev,
		enum led_brightness value)
		{
		struct da903x_led *led;

		led = container_of(led_cdev, struct da903x_led, cdev);
		led->new_brightness = value;
		schedule_work(&led->work);
		}

		static int __devinit da903x_led_probe(struct platform_device *pdev)
		{
		struct led_info *pdata = pdev->dev.platform_data;
		struct da903x_led *led;
		int id, ret;

		if (pdata == NULL)
		return 0;

		id = pdev->id;

		if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) \|\|
		(id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
		dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
		return -EINVAL;
		}

		led = kzalloc(sizeof(struct da903x_led), GFP_KERNEL);
		if (led == NULL) {
		dev_err(&pdev->dev, "failed to alloc memory for LED%d\n", id);
		return -ENOMEM;
		}

		led->cdev.name = pdata->name;
		led->cdev.default_trigger = pdata->default_trigger;
		led->cdev.brightness_set = da903x_led_set;
		led->cdev.brightness = LED_OFF;

		led->id = id;
		led->flags = pdata->flags;
		led->master = pdev->dev.parent;
		led->new_brightness = LED_OFF;

		INIT_WORK(&led->work, da903x_led_work);

		ret = led_classdev_register(led->master, &led->cdev);
		if (ret) {
		dev_err(&pdev->dev, "failed to register LED %d\n", id);
		goto err;
		}

		platform_set_drvdata(pdev, led);
		return 0;

		err:
		kfree(led);
		return ret;
		}

		static int __devexit da903x_led_remove(struct platform_device *pdev)
		{
		struct da903x_led *led = platform_get_drvdata(pdev);

		led_classdev_unregister(&led->cdev);
		kfree(led);
		return 0;
		}

		static struct platform_driver da903x_led_driver = {
		.driver = {
		.name = "da903x-led",
		.owner = THIS_MODULE,
		},
		.probe = da903x_led_probe,
		.remove = __devexit_p(da903x_led_remove),
		};

		static int __init da903x_led_init(void)
		{
		return platform_driver_register(&da903x_led_driver);
		}
		module_init(da903x_led_init);

		static void __exit da903x_led_exit(void)
		{
		platform_driver_unregister(&da903x_led_driver);
		}
		module_exit(da903x_led_exit);

		MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
		MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
		"Mike Rapoport <mike@compulab.co.il>");
		MODULE_LICENSE("GPL");
		MODULE_ALIAS("platform:da903x-led");