Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / leds / leds-da903x.c

diff --git a/kernel/drivers/leds/leds-da903x.c b/kernel/drivers/leds/leds-da903x.c
new file mode 100644 (file)
index 0000000..952ba96
--- /dev/null
+++ b/kernel/drivers/leds/leds-da903x.c
@@ -0,0 +1,158 @@
+/*
+ * 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/platform_device.h>
+#include <linux/leds.h>
+#include <linux/workqueue.h>
+#include <linux/mfd/da903x.h>
+#include <linux/slab.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 |= (0x7 - (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 da903x_led_probe(struct platform_device *pdev)
+{
+       struct led_info *pdata = dev_get_platdata(&pdev->dev);
+       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 = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);
+       if (!led)
+               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);
+               return ret;
+       }
+
+       platform_set_drvdata(pdev, led);
+       return 0;
+}
+
+static int da903x_led_remove(struct platform_device *pdev)
+{
+       struct da903x_led *led = platform_get_drvdata(pdev);
+
+       led_classdev_unregister(&led->cdev);
+       return 0;
+}
+
+static struct platform_driver da903x_led_driver = {
+       .driver = {
+               .name   = "da903x-led",
+       },
+       .probe          = da903x_led_probe,
+       .remove         = da903x_led_remove,
+};
+
+module_platform_driver(da903x_led_driver);
+
+MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
+MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da903x-led");