From b7a928304e90f08f29d08656e98850aa7a721a86 Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Thu, 14 Aug 2008 16:32:41 +0800 Subject: [PATCH] leds: add support of on-chip LED drivers for DA9030/DA9034 Signed-off-by: Mike Rapoport Signed-off-by: Eric Miao --- drivers/leds/Kconfig | 7 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-da903x.c | 172 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 180 insertions(+), 0 deletions(-) create mode 100644 drivers/leds/leds-da903x.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 9556262..dd2cef2 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -163,6 +163,13 @@ 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 diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index ff7982b..88cb26d 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -23,6 +23,7 @@ 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 diff --git a/drivers/leds/leds-da903x.c b/drivers/leds/leds-da903x.c new file mode 100644 index 0000000..71095e3 --- /dev/null +++ b/drivers/leds/leds-da903x.c @@ -0,0 +1,172 @@ +/* + * LEDs driver for Dialog Semiconductor DA9030/DA9034 + * + * Copyright (C) 2008 Compulab, Ltd. + * Mike Rapoport + * + * Copyright (C) 2006-2008 Marvell International Ltd. + * Eric Miao + * + * 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 +#include +#include +#include +#include +#include + +#define DA9030_LED1_CONTROL 0x20 +#define DA9030_LED2_CONTROL 0x21 +#define DA9030_LED3_CONTROL 0x22 +#define DA9030_LED4_CONTROL 0x23 +#define DA9030_MISC_CONTROL_A 0x24 /* 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 *da903x_dev; + enum led_brightness new_brightness; + int id; + int flags; +}; + +static void da903x_led_work(struct work_struct *work) +{ + struct da903x_led *led = container_of(work, struct da903x_led, work); + struct device *da903x_dev = led->da903x_dev; + 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: + offset = led->id - DA9030_ID_LED_1; + val = led->flags & ~0x87; + val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */ + val |= (led->new_brightness >> 5) & 0x7; /* PWM<2:0> */ + da903x_write(da903x_dev, DA9030_LED1_CONTROL + offset, val); + break; + case DA9030_ID_VIBRA: + val = led->flags & ~0x80; + val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */ + da903x_write(da903x_dev, DA9030_MISC_CONTROL_A, val); + break; + case DA9034_ID_LED_1: + case DA9034_ID_LED_2: + offset = led->id - DA9034_ID_LED_1; + val = (led->new_brightness * 0x5f / LED_FULL) & 0x7f; + val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0; + da903x_write(da903x_dev, DA9034_LED1_CONTROL + offset, val); + break; + case DA9034_ID_VIBRA: + val = led->new_brightness & 0xfe; + da903x_write(da903x_dev, 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 device *da903x_dev = pdev->dev.parent; + 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->da903x_dev = da903x_dev; + led->new_brightness = LED_OFF; + + INIT_WORK(&led->work, da903x_led_work); + + ret = led_classdev_register(&pdev->dev, &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 " + "Mike Rapoport "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da903x-led"); -- 1.5.4.3