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 e3e40427e00e8f9081d1a5326785c021727cb158..14bb57b16593c7f867293d263774554a76de0652 100644 (file)
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -157,6 +157,13 @@ 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 eb186c351a1c297d1c7bba0ffeb4f379f929afb7..e8714ad3ffff70604f1454f48a3f3a3d84e36c30 100644 (file)
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -22,6 +22,7 @@ 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 (file)
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");