leds: da903x: Add support for LEDs found on DA9030/DA9034
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index e3e4042..14bb57b 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -157,6 +157,13 @@
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 eb186c3..e8714ad 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -22,6 +22,7 @@
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..f1fddb1
--- /dev/null
+++ b/drivers/leds/leds-da903x.c
@@ -0,0 +1,175 @@
+/*
+ * LEDs driver for Dialog Semiconductor DA9030/DA9034
+ *
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.com>
+ *
+ * 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 <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/mfd/da903x.h>
+
+#define DA9030_LED1_CONTROL 0x20
+#define DA9030_LED2_CONTROL 0x21
+#define DA9030_LED3_CONTROL 0x22
+#define DA9030_LED4_CONTROL 0x23
+#define DA9030_LEDPC_CONTROL 0x24
+#define DA9030_MISC_CONTROL_A 0x26 /* 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 *master;
+ enum led_brightness new_brightness;
+ int id;
+ int flags;
+};
+
+#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
+#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)
+
+static void da903x_led_work(struct work_struct *work)
+{
+ struct da903x_led *led = container_of(work, struct da903x_led, work);
+ 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:
+ case DA9030_ID_LED_PC:
+ offset = DA9030_LED_OFFSET(led->id);
+ val = led->flags & ~0x87;
+ val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */
+ val |= (led->new_brightness >> 5) & 0x7; /* PWM<2:0> */
+ da903x_write(led->master, DA9030_LED1_CONTROL + offset, val);
+ break;
+ case DA9030_ID_VIBRA:
+ val = led->flags & ~0x80;
+ val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */
+ da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
+ break;
+ case DA9034_ID_LED_1:
+ case DA9034_ID_LED_2:
+ offset = DA9034_LED_OFFSET(led->id);
+ val = (led->new_brightness * 0x5f / LED_FULL) & 0x7f;
+ val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
+ da903x_write(led->master, DA9034_LED1_CONTROL + offset, val);
+ break;
+ case DA9034_ID_VIBRA:
+ val = led->new_brightness & 0xfe;
+ da903x_write(led->master, 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 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->master = pdev->dev.parent;
+ led->new_brightness = LED_OFF;
+
+ INIT_WORK(&led->work, da903x_led_work);
+
+ ret = led_classdev_register(led->master, &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 <eric.miao@marvell.com>"
+ "Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da903x-led");