From ed4a10b47ff1e4059157f33248a62d9551ced786 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Thu, 8 Oct 2009 04:00:19 -0400 Subject: leds: Add driver for ADP5520/ADP5501 MFD PMICs Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu Signed-off-by: Mike Frysinger Signed-off-by: Richard Purdie --- drivers/leds/Kconfig | 10 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-adp5520.c | 230 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 241 insertions(+) create mode 100644 drivers/leds/leds-adp5520.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index e2b7a5382ae6..f12a99676628 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -253,6 +253,16 @@ config LEDS_LT3593 LT3593 controller. This controller uses a special one-wire pulse coding protocol to set the brightness. +config LEDS_ADP5520 + tristate "LED Support for ADP5520/ADP5501 PMIC" + depends on LEDS_CLASS && PMIC_ADP5520 + help + This option enables support for on-chip LED drivers found + on Analog Devices ADP5520/ADP5501 PMICs. + + To compile this driver as a module, choose M here: the module will + be called leds-adp5520. + comment "LED Triggers" config LEDS_TRIGGERS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index eb5a141d825c..176f0c674751 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o obj-$(CONFIG_LEDS_PWM) += leds-pwm.o obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o +obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o diff --git a/drivers/leds/leds-adp5520.c b/drivers/leds/leds-adp5520.c new file mode 100644 index 000000000000..a8f315902131 --- /dev/null +++ b/drivers/leds/leds-adp5520.c @@ -0,0 +1,230 @@ +/* + * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs + * + * Copyright 2009 Analog Devices Inc. + * + * Loosely derived from leds-da903x: + * Copyright (C) 2008 Compulab, Ltd. + * Mike Rapoport + * + * Copyright (C) 2006-2008 Marvell International Ltd. + * Eric Miao + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include +#include +#include +#include + +struct adp5520_led { + struct led_classdev cdev; + struct work_struct work; + struct device *master; + enum led_brightness new_brightness; + int id; + int flags; +}; + +static void adp5520_led_work(struct work_struct *work) +{ + struct adp5520_led *led = container_of(work, struct adp5520_led, work); + adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1, + led->new_brightness >> 2); +} + +static void adp5520_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct adp5520_led *led; + + led = container_of(led_cdev, struct adp5520_led, cdev); + led->new_brightness = value; + schedule_work(&led->work); +} + +static int adp5520_led_setup(struct adp5520_led *led) +{ + struct device *dev = led->master; + int flags = led->flags; + int ret = 0; + + switch (led->id) { + case FLAG_ID_ADP5520_LED1_ADP5501_LED0: + ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, + (flags >> ADP5520_FLAG_OFFT_SHIFT) & + ADP5520_FLAG_OFFT_MASK); + ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, + ADP5520_LED1_EN); + break; + case FLAG_ID_ADP5520_LED2_ADP5501_LED1: + ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, + ((flags >> ADP5520_FLAG_OFFT_SHIFT) & + ADP5520_FLAG_OFFT_MASK) << 2); + ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL, + ADP5520_R3_MODE); + ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, + ADP5520_LED2_EN); + break; + case FLAG_ID_ADP5520_LED3_ADP5501_LED2: + ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, + ((flags >> ADP5520_FLAG_OFFT_SHIFT) & + ADP5520_FLAG_OFFT_MASK) << 4); + ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL, + ADP5520_C3_MODE); + ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, + ADP5520_LED3_EN); + break; + } + + return ret; +} + +static int __devinit adp5520_led_prepare(struct platform_device *pdev) +{ + struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data; + struct device *dev = pdev->dev.parent; + int ret = 0; + + ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0); + ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0); + ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0); + ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6); + ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in, + pdata->fade_out)); + + return ret; +} + +static int __devinit adp5520_led_probe(struct platform_device *pdev) +{ + struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data; + struct adp5520_led *led, *led_dat; + struct led_info *cur_led; + int ret, i; + + if (pdata == NULL) { + dev_err(&pdev->dev, "missing platform data\n"); + return -ENODEV; + } + + if (pdata->num_leds > ADP5520_01_MAXLEDS) { + dev_err(&pdev->dev, "can't handle more than %d LEDS\n", + ADP5520_01_MAXLEDS); + return -EFAULT; + } + + led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL); + if (led == NULL) { + dev_err(&pdev->dev, "failed to alloc memory\n"); + return -ENOMEM; + } + + ret = adp5520_led_prepare(pdev); + + if (ret) { + dev_err(&pdev->dev, "failed to write\n"); + goto err_free; + } + + for (i = 0; i < pdata->num_leds; ++i) { + cur_led = &pdata->leds[i]; + led_dat = &led[i]; + + led_dat->cdev.name = cur_led->name; + led_dat->cdev.default_trigger = cur_led->default_trigger; + led_dat->cdev.brightness_set = adp5520_led_set; + led_dat->cdev.brightness = LED_OFF; + + if (cur_led->flags & ADP5520_FLAG_LED_MASK) + led_dat->flags = cur_led->flags; + else + led_dat->flags = i + 1; + + led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK; + + led_dat->master = pdev->dev.parent; + led_dat->new_brightness = LED_OFF; + + INIT_WORK(&led_dat->work, adp5520_led_work); + + ret = led_classdev_register(led_dat->master, &led_dat->cdev); + if (ret) { + dev_err(&pdev->dev, "failed to register LED %d\n", + led_dat->id); + goto err; + } + + ret = adp5520_led_setup(led_dat); + if (ret) { + dev_err(&pdev->dev, "failed to write\n"); + i++; + goto err; + } + } + + platform_set_drvdata(pdev, led); + return 0; + +err: + if (i > 0) { + for (i = i - 1; i >= 0; i--) { + led_classdev_unregister(&led[i].cdev); + cancel_work_sync(&led[i].work); + } + } + +err_free: + kfree(led); + return ret; +} + +static int __devexit adp5520_led_remove(struct platform_device *pdev) +{ + struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data; + struct adp5520_led *led; + int i; + + led = platform_get_drvdata(pdev); + + adp5520_clr_bits(led->master, ADP5520_LED_CONTROL, + ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN); + + for (i = 0; i < pdata->num_leds; i++) { + led_classdev_unregister(&led[i].cdev); + cancel_work_sync(&led[i].work); + } + + kfree(led); + return 0; +} + +static struct platform_driver adp5520_led_driver = { + .driver = { + .name = "adp5520-led", + .owner = THIS_MODULE, + }, + .probe = adp5520_led_probe, + .remove = __devexit_p(adp5520_led_remove), +}; + +static int __init adp5520_led_init(void) +{ + return platform_driver_register(&adp5520_led_driver); +} +module_init(adp5520_led_init); + +static void __exit adp5520_led_exit(void) +{ + platform_driver_unregister(&adp5520_led_driver); +} +module_exit(adp5520_led_exit); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("LEDS ADP5520(01) Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:adp5520-led"); -- cgit v1.2.3-59-g8ed1b