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leds: Add driver for ADP5520/ADP5501 MFD PMICs
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Michael Hennerich
Richard Purdie
parent
a8dd18feb6
commit
ed4a10b47f
3 changed files with 241 additions and 0 deletions
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@ -253,6 +253,16 @@ config LEDS_LT3593
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LT3593 controller. This controller uses a special one-wire pulse
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coding protocol to set the brightness.
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config LEDS_ADP5520
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tristate "LED Support for ADP5520/ADP5501 PMIC"
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depends on LEDS_CLASS && PMIC_ADP5520
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help
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This option enables support for on-chip LED drivers found
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on Analog Devices ADP5520/ADP5501 PMICs.
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To compile this driver as a module, choose M here: the module will
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be called leds-adp5520.
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comment "LED Triggers"
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config LEDS_TRIGGERS
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@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
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obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
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obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o
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obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o
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obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o
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# LED SPI Drivers
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obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
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230
drivers/leds/leds-adp5520.c
Normal file
230
drivers/leds/leds-adp5520.c
Normal file
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@ -0,0 +1,230 @@
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/*
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* LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
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*
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* Copyright 2009 Analog Devices Inc.
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*
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* Loosely derived from leds-da903x:
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* Copyright (C) 2008 Compulab, Ltd.
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* Mike Rapoport <mike@compulab.co.il>
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*
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* Copyright (C) 2006-2008 Marvell International Ltd.
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* Eric Miao <eric.miao@marvell.com>
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/leds.h>
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#include <linux/workqueue.h>
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#include <linux/mfd/adp5520.h>
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struct adp5520_led {
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struct led_classdev cdev;
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struct work_struct work;
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struct device *master;
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enum led_brightness new_brightness;
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int id;
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int flags;
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};
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static void adp5520_led_work(struct work_struct *work)
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{
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struct adp5520_led *led = container_of(work, struct adp5520_led, work);
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adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
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led->new_brightness >> 2);
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}
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static void adp5520_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct adp5520_led *led;
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led = container_of(led_cdev, struct adp5520_led, cdev);
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led->new_brightness = value;
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schedule_work(&led->work);
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}
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static int adp5520_led_setup(struct adp5520_led *led)
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{
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struct device *dev = led->master;
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int flags = led->flags;
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int ret = 0;
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switch (led->id) {
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case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
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ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
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(flags >> ADP5520_FLAG_OFFT_SHIFT) &
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ADP5520_FLAG_OFFT_MASK);
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ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
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ADP5520_LED1_EN);
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break;
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case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
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ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
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((flags >> ADP5520_FLAG_OFFT_SHIFT) &
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ADP5520_FLAG_OFFT_MASK) << 2);
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ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
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ADP5520_R3_MODE);
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ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
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ADP5520_LED2_EN);
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break;
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case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
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ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
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((flags >> ADP5520_FLAG_OFFT_SHIFT) &
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ADP5520_FLAG_OFFT_MASK) << 4);
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ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
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ADP5520_C3_MODE);
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ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
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ADP5520_LED3_EN);
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break;
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}
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return ret;
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}
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static int __devinit adp5520_led_prepare(struct platform_device *pdev)
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{
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struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
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struct device *dev = pdev->dev.parent;
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int ret = 0;
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ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
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ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
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ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
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ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
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ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
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pdata->fade_out));
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return ret;
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}
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static int __devinit adp5520_led_probe(struct platform_device *pdev)
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{
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struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
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struct adp5520_led *led, *led_dat;
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struct led_info *cur_led;
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int ret, i;
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if (pdata == NULL) {
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dev_err(&pdev->dev, "missing platform data\n");
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return -ENODEV;
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}
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if (pdata->num_leds > ADP5520_01_MAXLEDS) {
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dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
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ADP5520_01_MAXLEDS);
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return -EFAULT;
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}
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led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
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if (led == NULL) {
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dev_err(&pdev->dev, "failed to alloc memory\n");
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return -ENOMEM;
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}
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ret = adp5520_led_prepare(pdev);
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if (ret) {
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dev_err(&pdev->dev, "failed to write\n");
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goto err_free;
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}
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for (i = 0; i < pdata->num_leds; ++i) {
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cur_led = &pdata->leds[i];
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led_dat = &led[i];
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led_dat->cdev.name = cur_led->name;
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led_dat->cdev.default_trigger = cur_led->default_trigger;
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led_dat->cdev.brightness_set = adp5520_led_set;
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led_dat->cdev.brightness = LED_OFF;
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if (cur_led->flags & ADP5520_FLAG_LED_MASK)
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led_dat->flags = cur_led->flags;
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else
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led_dat->flags = i + 1;
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led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
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led_dat->master = pdev->dev.parent;
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led_dat->new_brightness = LED_OFF;
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INIT_WORK(&led_dat->work, adp5520_led_work);
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ret = led_classdev_register(led_dat->master, &led_dat->cdev);
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if (ret) {
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dev_err(&pdev->dev, "failed to register LED %d\n",
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led_dat->id);
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goto err;
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}
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ret = adp5520_led_setup(led_dat);
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if (ret) {
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dev_err(&pdev->dev, "failed to write\n");
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i++;
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goto err;
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}
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}
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platform_set_drvdata(pdev, led);
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return 0;
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err:
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if (i > 0) {
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for (i = i - 1; i >= 0; i--) {
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led_classdev_unregister(&led[i].cdev);
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cancel_work_sync(&led[i].work);
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}
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}
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err_free:
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kfree(led);
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return ret;
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}
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static int __devexit adp5520_led_remove(struct platform_device *pdev)
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{
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struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
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struct adp5520_led *led;
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int i;
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led = platform_get_drvdata(pdev);
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adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
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ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
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for (i = 0; i < pdata->num_leds; i++) {
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led_classdev_unregister(&led[i].cdev);
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cancel_work_sync(&led[i].work);
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}
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kfree(led);
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return 0;
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}
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static struct platform_driver adp5520_led_driver = {
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.driver = {
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.name = "adp5520-led",
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.owner = THIS_MODULE,
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},
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.probe = adp5520_led_probe,
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.remove = __devexit_p(adp5520_led_remove),
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};
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static int __init adp5520_led_init(void)
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{
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return platform_driver_register(&adp5520_led_driver);
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}
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module_init(adp5520_led_init);
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static void __exit adp5520_led_exit(void)
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{
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platform_driver_unregister(&adp5520_led_driver);
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}
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module_exit(adp5520_led_exit);
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MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
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MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:adp5520-led");
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