Any update on below patch? On Mon, 2012-02-06 at 18:16 +0530, Ashish Jangam wrote: > DA9052/53 PMIC has capability to supply power for upto 3 banks of 6 > white serial LEDS. It can also control intensity of independent banks > and to drive these banks boost converter will provide up to 24V and > forward current of max. 50mA. > > This patch allows to control intensity of the individual WLEDs bank > through DA9052/53 PMIC. > > This patch is functionally tested on Samsung SMDKV6410. > > Signed-off-by: David Dajun Chen <dc...@diasemi.com> > Signed-off-by: Ashish Jangam <ashish.jan...@kpitcummins.com> > --- > drivers/video/backlight/Kconfig | 6 + > drivers/video/backlight/Makefile | 1 + > drivers/video/backlight/da9052_bl.c | 187 > +++++++++++++++++++++++++++++++++++ > 3 files changed, 194 insertions(+), 0 deletions(-) > create mode 100644 drivers/video/backlight/da9052_bl.c > diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig > index 49e7d83..77a3942 100644 > --- a/drivers/video/backlight/Kconfig > +++ b/drivers/video/backlight/Kconfig > @@ -245,6 +245,12 @@ config BACKLIGHT_DA903X > If you have a LCD backlight connected to the WLED output of DA9030 > or DA9034 WLED output, say Y here to enable this driver. > > +config BACKLIGHT_DA9052 > + tristate "Dialog DA9052/DA9053 WLED" > + depends on PMIC_DA9052 > + help > + Enable the Backlight Driver for DA9052-BC and DA9053-AA/Bx PMICs. > + > config BACKLIGHT_MAX8925 > tristate "Backlight driver for MAX8925" > depends on MFD_MAX8925 > diff --git a/drivers/video/backlight/Makefile > b/drivers/video/backlight/Makefile > index 0ee06e0..6622f34 100644 > --- a/drivers/video/backlight/Makefile > +++ b/drivers/video/backlight/Makefile > @@ -28,6 +28,7 @@ obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o > obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o > obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o > obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o > +obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o > obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o > obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o > obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o > diff --git a/drivers/video/backlight/da9052_bl.c > b/drivers/video/backlight/da9052_bl.c > new file mode 100644 > index 0000000..b628d68 > --- /dev/null > +++ b/drivers/video/backlight/da9052_bl.c > @@ -0,0 +1,187 @@ > +/* > + * Backlight Driver for Dialog DA9052 PMICs > + * > + * Copyright(c) 2012 Dialog Semiconductor Ltd. > + * > + * Author: David Dajun Chen <dc...@diasemi.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + */ > + > +#include <linux/backlight.h> > +#include <linux/delay.h> > +#include <linux/fb.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > + > +#include <linux/mfd/da9052/da9052.h> > +#include <linux/mfd/da9052/reg.h> > + > +#define DA9052_MAX_BRIGHTNESS 0xFF > + > +enum { > + DA9052_WLEDS_OFF, > + DA9052_WLEDS_ON, > +}; > + > +enum { > + DA9052_TYPE_WLED1, > + DA9052_TYPE_WLED2, > + DA9052_TYPE_WLED3, > +}; > + > +static unsigned char wled_bank[] = { > + DA9052_LED1_CONF_REG, > + DA9052_LED2_CONF_REG, > + DA9052_LED3_CONF_REG, > +}; > + > +struct da9052_bl { > + struct da9052 *da9052; > + uint brightness; > + uint state; > + uint led_reg; > +}; > + > +static int da9052_adjust_wled_brightness(struct da9052_bl *wleds) > +{ > + unsigned char boost_en; > + unsigned char i_sink; > + int ret; > + > + boost_en = 0x3F; > + i_sink = 0xFF; > + if (wleds->state == DA9052_WLEDS_OFF) { > + boost_en = 0x00; > + i_sink = 0x00; > + } > + > + ret = da9052_reg_write(wleds->da9052, DA9052_BOOST_REG, boost_en); > + if (ret < 0) > + return ret; > + > + ret = da9052_reg_write(wleds->da9052, DA9052_LED_CONT_REG, i_sink); > + if (ret < 0) > + return ret; > + > + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], 0x0); > + if (ret < 0) > + return ret; > + > + msleep(10); > + > + if (wleds->brightness) { > + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], > + wleds->brightness); > + if (ret < 0) > + return ret; > + } > + > + return 0; > +} > + > +static int da9052_backlight_update_status(struct backlight_device *bl) > +{ > + int brightness = bl->props.brightness; > + struct da9052_bl *wleds = bl_get_data(bl); > + > + wleds->brightness = brightness; > + wleds->state = DA9052_WLEDS_ON; > + > + return da9052_adjust_wled_brightness(wleds); > +} > + > +static int da9052_backlight_get_brightness(struct backlight_device *bl) > +{ > + struct da9052_bl *wleds = bl_get_data(bl); > + > + return wleds->brightness; > +} > + > +static const struct backlight_ops da9052_backlight_ops = { > + .update_status = da9052_backlight_update_status, > + .get_brightness = da9052_backlight_get_brightness, > +}; > + > +static int da9052_backlight_probe(struct platform_device *pdev) > +{ > + struct backlight_device *bl; > + struct backlight_properties props; > + struct da9052_bl *wleds; > + > + wleds = devm_kzalloc(&pdev->dev, sizeof(struct da9052_bl), GFP_KERNEL); > + if (!wleds) > + return -ENOMEM; > + > + wleds->da9052 = dev_get_drvdata(pdev->dev.parent); > + wleds->brightness = 0; > + wleds->led_reg = platform_get_device_id(pdev)->driver_data; > + wleds->state = DA9052_WLEDS_OFF; > + > + props.type = BACKLIGHT_RAW; > + props.max_brightness = DA9052_MAX_BRIGHTNESS; > + > + bl = backlight_device_register(pdev->name, wleds->da9052->dev, wleds, > + &da9052_backlight_ops, &props); > + if (IS_ERR(bl)) { > + dev_err(&pdev->dev, "Failed to register backlight\n"); > + devm_kfree(&pdev->dev, wleds); > + return PTR_ERR(bl); > + } > + > + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; > + bl->props.brightness = 0; > + platform_set_drvdata(pdev, bl); > + > + return da9052_adjust_wled_brightness(wleds); > +} > + > +static int da9052_backlight_remove(struct platform_device *pdev) > +{ > + struct backlight_device *bl = platform_get_drvdata(pdev); > + struct da9052_bl *wleds = bl_get_data(bl); > + > + wleds->brightness = 0; > + wleds->state = DA9052_WLEDS_OFF; > + da9052_adjust_wled_brightness(wleds); > + backlight_device_unregister(bl); > + devm_kfree(&pdev->dev, wleds); > + > + return 0; > +} > + > +static struct platform_device_id da9052_wled_ids[] = { > + { > + .name = "da9052-wled1", > + .driver_data = DA9052_TYPE_WLED1, > + }, > + { > + .name = "da9052-wled2", > + .driver_data = DA9052_TYPE_WLED2, > + }, > + { > + .name = "da9052-wled3", > + .driver_data = DA9052_TYPE_WLED3, > + }, > +}; > + > +static struct platform_driver da9052_wled_driver = { > + .probe = da9052_backlight_probe, > + .remove = da9052_backlight_remove, > + .id_table = da9052_wled_ids, > + .driver = { > + .name = "da9052-wled", > + .owner = THIS_MODULE, > + }, > +}; > + > +module_platform_driver(da9052_wled_driver); > + > +MODULE_AUTHOR("David Dajun Chen <dc...@diasemi.com>"); > +MODULE_DESCRIPTION("Backlight driver for DA9052 PMIC"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:da9052-backlight"); >
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