led: Bring in PMIC LED driver

Signed-off-by: Stepan Moskovchenko <stepanm@quicinc.com>

drivers/leds/Kconfig

@@ -307,6 +307,15 @@ config LEDS_BD2802
 	  This option enables support for BD2802GU RGB LED driver chips
 	  accessed via the I2C bus.
 
+config LEDS_MSM_PMIC
+        tristate "LED Support for Qualcomm PMIC connected LEDs"
+        default n
+        depends on ARCH_MSM
+        help
+          This option enables support for LEDs connected over PMIC
+          (Power Management IC) chip on Qualcomm reference boards,
+          for example SURF and FFAs.
+
 config LEDS_INTEL_SS4200
 	tristate "LED driver for Intel NAS SS4200 series"
 	depends on LEDS_CLASS

drivers/leds/Makefile

@@ -30,6 +30,7 @@ obj-$(CONFIG_LEDS_HP6XX)		+= leds-hp6xx.o
 obj-$(CONFIG_LEDS_OT200)		+= leds-ot200.o
 obj-$(CONFIG_LEDS_FSG)			+= leds-fsg.o
 obj-$(CONFIG_LEDS_PCA955X)		+= leds-pca955x.o
+obj-$(CONFIG_LEDS_MSM_PMIC)		+= leds-msm-pmic.o
 obj-$(CONFIG_LEDS_PCA9633)		+= leds-pca9633.o
 obj-$(CONFIG_LEDS_DA903X)		+= leds-da903x.o
 obj-$(CONFIG_LEDS_WM831X_STATUS)	+= leds-wm831x-status.o

drivers/leds/leds-msm-pmic.c

@@ -0,0 +1,105 @@
+/*
+ * leds-msm-pmic.c - MSM PMIC LEDs driver.
+ *
+ * Copyright (c) 2009, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+
+#include <mach/pmic.h>
+
+#define MAX_KEYPAD_BL_LEVEL	16
+
+static void msm_keypad_bl_led_set(struct led_classdev *led_cdev,
+	enum led_brightness value)
+{
+	int ret;
+
+	ret = pmic_set_led_intensity(LED_KEYPAD, value / MAX_KEYPAD_BL_LEVEL);
+	if (ret)
+		dev_err(led_cdev->dev, "can't set keypad backlight\n");
+}
+
+static struct led_classdev msm_kp_bl_led = {
+	.name			= "keyboard-backlight",
+	.brightness_set		= msm_keypad_bl_led_set,
+	.brightness		= LED_OFF,
+};
+
+static int msm_pmic_led_probe(struct platform_device *pdev)
+{
+	int rc;
+
+	rc = led_classdev_register(&pdev->dev, &msm_kp_bl_led);
+	if (rc) {
+		dev_err(&pdev->dev, "unable to register led class driver\n");
+		return rc;
+	}
+	msm_keypad_bl_led_set(&msm_kp_bl_led, LED_OFF);
+	return rc;
+}
+
+static int __devexit msm_pmic_led_remove(struct platform_device *pdev)
+{
+	led_classdev_unregister(&msm_kp_bl_led);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int msm_pmic_led_suspend(struct platform_device *dev,
+		pm_message_t state)
+{
+	led_classdev_suspend(&msm_kp_bl_led);
+
+	return 0;
+}
+
+static int msm_pmic_led_resume(struct platform_device *dev)
+{
+	led_classdev_resume(&msm_kp_bl_led);
+
+	return 0;
+}
+#else
+#define msm_pmic_led_suspend NULL
+#define msm_pmic_led_resume NULL
+#endif
+
+static struct platform_driver msm_pmic_led_driver = {
+	.probe		= msm_pmic_led_probe,
+	.remove		= __devexit_p(msm_pmic_led_remove),
+	.suspend	= msm_pmic_led_suspend,
+	.resume		= msm_pmic_led_resume,
+	.driver		= {
+		.name	= "pmic-leds",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init msm_pmic_led_init(void)
+{
+	return platform_driver_register(&msm_pmic_led_driver);
+}
+module_init(msm_pmic_led_init);
+
+static void __exit msm_pmic_led_exit(void)
+{
+	platform_driver_unregister(&msm_pmic_led_driver);
+}
+module_exit(msm_pmic_led_exit);
+
+MODULE_DESCRIPTION("MSM PMIC LEDs driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:pmic-leds");