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Date: Tue, 24 May 2011 18:12:15 +0530
From: Ashish Jangam <Ashish.Jangam@...tcummins.com>
To: Richard Purdie <rpurdie@...ys.net>,
Thiago Farina <tfransosi@...il.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
David Dajun Chen <Dajun.Chen@...semi.com>
Subject: [PATCHv2 9/11] BACKLIGHT: Coding Style Corrected
Hi Richard,
Coding style corrected.
Signed-off-by: David Dajun Chen <dchen@...semi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@...tcummins.com>
---
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 0c9373b..a14fb21 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -237,6 +237,12 @@ config BACKLIGHT_DA903X
If you have a LCD backlight connected to the WLED output of DA9030
or DA9034 WLED output, say Y here to enable this driver.
+config BACKLIGHT_DA9052
+ tristate "Dialog DA9052 WLED"
+ depends on PMIC_DA9052
+ help
+ Enable the DA9052 Backlight Driver
+
config BACKLIGHT_MAX8925
tristate "Backlight driver for MAX8925"
depends on MFD_MAX8925
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index b9ca849..a317e11 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o
obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o
obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o
obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o
+obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o
obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o
obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o
obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o
diff --git a/drivers/video/backlight/da9052_bl.c b/drivers/video/backlight/da9052_bl.c
new file mode 100755
index 0000000..73fe1ed
--- /dev/null
+++ b/drivers/video/backlight/da9052_bl.c
@@ -0,0 +1,218 @@
+/*
+ * Backlight Driver for Dialog DA9052 PMICs
+ *
+ * Copyright(c) 2011 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@...semi.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+
+#define DA9052_MAX_BRIGHTNESS 0xFF
+
+enum {
+ DA9052_WLEDS_OFF,
+ DA9052_WLEDS_ON,
+};
+
+static unsigned char wled_bank[] = {
+ DA9052_LED1_CONF_REG,
+ DA9052_LED2_CONF_REG,
+ DA9052_LED3_CONF_REG,
+};
+
+struct da9052_bl {
+ struct da9052 *da9052;
+ uint brightness;
+ uint state;
+ uint led_reg;
+};
+
+static int da9052_adjust_wled_brightness(struct da9052_bl *wleds)
+{
+ unsigned char boost_en;
+ unsigned char i_sink;
+ int ret;
+
+ boost_en = 0x3F;
+ i_sink = 0xFF;
+ if (wleds->state == DA9052_WLEDS_OFF) {
+ boost_en = 0x00;
+ i_sink = 0x00;
+ }
+
+ ret = da9052_reg_write(wleds->da9052, DA9052_BOOST_REG, boost_en);
+ if (ret < 0) {
+ dev_err(wleds->da9052->dev,
+ "Failed to write boost reg, %d\n", ret);
+ return ret;
+ }
+
+ ret = da9052_reg_write(wleds->da9052, DA9052_LED_CONT_REG, i_sink);
+ if (ret < 0) {
+ dev_err(wleds->da9052->dev,
+ "Failed to write led cont reg, %d\n", ret);
+ return ret;
+ }
+
+ ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], 0x0);
+ if (ret < 0) {
+ dev_err(wleds->da9052->dev,
+ "Failed to write led conf reg, %d", ret);
+ return ret;
+ }
+
+ if (wleds->brightness) {
+ msleep(10);
+ ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg],
+ wleds->brightness);
+ if (ret < 0) {
+ dev_err(wleds->da9052->dev,
+ "Failed to write led conf reg, %d",
+ ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int da9052_backlight_update_status(struct backlight_device *bl)
+{
+ int brightness = bl->props.brightness;
+ struct da9052_bl *wleds = bl_get_data(bl);
+
+ wleds->brightness = brightness;
+ wleds->state = DA9052_WLEDS_ON;
+
+ return da9052_adjust_wled_brightness(wleds);
+}
+
+static int da9052_backlight_get_brightness(struct backlight_device *bl)
+{
+ struct da9052_bl *wleds = bl_get_data(bl);
+
+ return wleds->brightness;
+}
+
+static const struct backlight_ops da9052_backlight_ops = {
+ .update_status = da9052_backlight_update_status,
+ .get_brightness = da9052_backlight_get_brightness,
+};
+
+static int da9052_backlight_probe(struct platform_device *pdev)
+{
+ struct backlight_device *bl;
+ struct backlight_properties props;
+ static int led_reg_num;
+ struct da9052_bl *wleds;
+
+ wleds = kzalloc(sizeof(struct da9052_bl), GFP_KERNEL);
+ if (!wleds)
+ return -ENOMEM;
+
+ wleds->da9052 = dev_get_drvdata(pdev->dev.parent);
+ wleds->brightness = 0;
+ wleds->led_reg = led_reg_num++;
+ wleds->state = DA9052_WLEDS_OFF;
+
+ bl = backlight_device_register(pdev->name, wleds->da9052->dev,
+ wleds, &da9052_backlight_ops,
+ &props);
+ if (IS_ERR(bl)) {
+ dev_err(&pdev->dev, "Failed to register backlight\n");
+ kfree(wleds);
+ return PTR_ERR(bl);
+ }
+
+ bl->props.max_brightness = DA9052_MAX_BRIGHTNESS;
+ bl->props.brightness = 0;
+ platform_set_drvdata(pdev, bl);
+
+ return da9052_adjust_wled_brightness(wleds);
+}
+
+static int da9052_backlight_remove(struct platform_device *pdev)
+{
+ struct backlight_device *bl = platform_get_drvdata(pdev);
+ struct da9052_bl *wleds = bl_get_data(bl);
+
+ wleds->brightness = 0;
+ wleds->state = DA9052_WLEDS_OFF;
+ da9052_adjust_wled_brightness(wleds);
+ backlight_device_unregister(bl);
+
+ return 0;
+}
+
+static struct platform_driver da9052_wled1_driver = {
+ .driver = {
+ .name = "da9052-WLED1",
+ .owner = THIS_MODULE,
+ },
+ .probe = da9052_backlight_probe,
+ .remove = da9052_backlight_remove,
+};
+
+static struct platform_driver da9052_wled2_driver = {
+ .driver = {
+ .name = "da9052-WLED2",
+ .owner = THIS_MODULE,
+ },
+ .probe = da9052_backlight_probe,
+ .remove = da9052_backlight_remove,
+};
+
+static struct platform_driver da9052_wled3_driver = {
+ .driver = {
+ .name = "da9052-WLED3",
+ .owner = THIS_MODULE,
+ },
+ .probe = da9052_backlight_probe,
+ .remove = da9052_backlight_remove,
+};
+
+static int __init da9052_backlight_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&da9052_wled1_driver);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&da9052_wled2_driver);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&da9052_wled3_driver);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+module_init(da9052_backlight_init);
+
+static void __exit da9052_backlight_exit(void)
+{
+ platform_driver_unregister(&da9052_wled1_driver);
+ platform_driver_unregister(&da9052_wled2_driver);
+ platform_driver_unregister(&da9052_wled3_driver);
+}
+module_exit(da9052_backlight_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@...semi.com>");
+MODULE_DESCRIPTION("Backlight driver for DA9052 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9052-backlight");
Regards,
Ashish
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