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path: root/drivers/video/backlight
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-rw-r--r--drivers/video/backlight/Kconfig6
-rw-r--r--drivers/video/backlight/Makefile1
-rw-r--r--drivers/video/backlight/da9052_bl.c187
-rw-r--r--drivers/video/backlight/locomolcd.c9
4 files changed, 195 insertions, 8 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 7ed9991fa747..af16884491ed 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -245,6 +245,12 @@ 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/DA9053 WLED"
+ depends on PMIC_DA9052
+ help
+ Enable the Backlight Driver for DA9052-BC and DA9053-AA/Bx PMICs.
+
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 8071eb656147..36855ae887d6 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -29,6 +29,7 @@ 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 100644
index 000000000000..b628d68f5162
--- /dev/null
+++ b/drivers/video/backlight/da9052_bl.c
@@ -0,0 +1,187 @@
+/*
+ * Backlight Driver for Dialog DA9052 PMICs
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.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/module.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,
+};
+
+enum {
+ DA9052_TYPE_WLED1,
+ DA9052_TYPE_WLED2,
+ DA9052_TYPE_WLED3,
+};
+
+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)
+ return ret;
+
+ ret = da9052_reg_write(wleds->da9052, DA9052_LED_CONT_REG, i_sink);
+ if (ret < 0)
+ return ret;
+
+ ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], 0x0);
+ if (ret < 0)
+ return ret;
+
+ msleep(10);
+
+ if (wleds->brightness) {
+ ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg],
+ wleds->brightness);
+ if (ret < 0)
+ 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;
+ struct da9052_bl *wleds;
+
+ wleds = devm_kzalloc(&pdev->dev, sizeof(struct da9052_bl), GFP_KERNEL);
+ if (!wleds)
+ return -ENOMEM;
+
+ wleds->da9052 = dev_get_drvdata(pdev->dev.parent);
+ wleds->brightness = 0;
+ wleds->led_reg = platform_get_device_id(pdev)->driver_data;
+ wleds->state = DA9052_WLEDS_OFF;
+
+ props.type = BACKLIGHT_RAW;
+ props.max_brightness = DA9052_MAX_BRIGHTNESS;
+
+ 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");
+ devm_kfree(&pdev->dev, 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);
+ devm_kfree(&pdev->dev, wleds);
+
+ return 0;
+}
+
+static struct platform_device_id da9052_wled_ids[] = {
+ {
+ .name = "da9052-wled1",
+ .driver_data = DA9052_TYPE_WLED1,
+ },
+ {
+ .name = "da9052-wled2",
+ .driver_data = DA9052_TYPE_WLED2,
+ },
+ {
+ .name = "da9052-wled3",
+ .driver_data = DA9052_TYPE_WLED3,
+ },
+};
+
+static struct platform_driver da9052_wled_driver = {
+ .probe = da9052_backlight_probe,
+ .remove = da9052_backlight_remove,
+ .id_table = da9052_wled_ids,
+ .driver = {
+ .name = "da9052-wled",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(da9052_wled_driver);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("Backlight driver for DA9052 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9052-backlight");
diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c
index be20b5cbe26c..3a6d5419e3e3 100644
--- a/drivers/video/backlight/locomolcd.c
+++ b/drivers/video/backlight/locomolcd.c
@@ -229,14 +229,7 @@ static struct locomo_driver poodle_lcd_driver = {
static int __init locomolcd_init(void)
{
- int ret = locomo_driver_register(&poodle_lcd_driver);
- if (ret)
- return ret;
-
-#ifdef CONFIG_SA1100_COLLIE
- sa1100fb_lcd_power = locomolcd_power;
-#endif
- return 0;
+ return locomo_driver_register(&poodle_lcd_driver);
}
static void __exit locomolcd_exit(void)
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 09:47:23 +0000