Re: [PATCH 2/5] LED Support for ADP5520/ADP5501 MFD PMICs

From: Samuel Ortiz
Date: Mon Oct 19 2009 - 11:31:47 EST

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Hi Richard,

On Wed, Oct 14, 2009 at 06:53:35PM +0100, Richard Purdie wrote:
> Hi Samuel,
>
> On Mon, 2009-10-12 at 18:38 +0200, Samuel Ortiz wrote:
> > On Sat, Oct 10, 2009 at 01:54:01PM -0400, Mike Frysinger wrote:
> > > From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
> > Does this driver look fine to you ?
>
> Yes, looks good to me. Do you want to take it with the others or should
> I put it through the LEDs tree? The latter would avoid conflicts over
> the Kconfig/Makefile I guess?
I agree. Please go ahead and merge it through your LED tree, thanks in
advance.

Cheers,
Samuel.

> Cheers,
>
> Richard
>
> > Cheers,
> > Samuel.
> >
> >
> > > Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
> > > Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx>
> > > Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
> > > ---
> > > drivers/leds/Kconfig | 10 ++
> > > drivers/leds/Makefile | 1 +
> > > drivers/leds/leds-adp5520.c | 230 +++++++++++++++++++++++++++++++++++++++++++
> > > 3 files changed, 241 insertions(+), 0 deletions(-)
> > > create mode 100644 drivers/leds/leds-adp5520.c
> > >
> > > diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> > > index e4f599f..33ac8dc 100644
> > > --- a/drivers/leds/Kconfig
> > > +++ b/drivers/leds/Kconfig
> > > @@ -236,6 +236,16 @@ config LEDS_BD2802
> > > This option enables support for BD2802GU RGB LED driver chips
> > > accessed via the I2C bus.
> > >
> > > +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 46d7270..f7e17f4 100644
> > > --- a/drivers/leds/Makefile
> > > +++ b/drivers/leds/Makefile
> > > @@ -29,6 +29,7 @@ obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
> > > obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
> > > obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
> > > obj-$(CONFIG_LEDS_PWM) += leds-pwm.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 0000000..a8f3159
> > > --- /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 <mike@xxxxxxxxxxxxxx>
> > > + *
> > > + * Copyright (C) 2006-2008 Marvell International Ltd.
> > > + * Eric Miao <eric.miao@xxxxxxxxxxx>
> > > + *
> > > + * Licensed under the GPL-2 or later.
> > > + */
> > > +
> > > +#include <linux/module.h>
> > > +#include <linux/kernel.h>
> > > +#include <linux/init.h>
> > > +#include <linux/platform_device.h>
> > > +#include <linux/leds.h>
> > > +#include <linux/workqueue.h>
> > > +#include <linux/mfd/adp5520.h>
> > > +
> > > +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 <hennerich@xxxxxxxxxxxxxxxxxxxx>");
> > > +MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
> > > +MODULE_LICENSE("GPL");
> > > +MODULE_ALIAS("platform:adp5520-led");
> > > --
> > > 1.6.5.rc2
> > >
> >
>

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