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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2019-07-22 15:44:17 +0200
committerSekhar Nori <nsekhar@ti.com>2019-08-26 14:23:56 +0200
commit7b5ab6437961f5e37ab9adfae18cf1671e39e7a3 (patch)
tree29c6c20d93222c61832a22fe0e6b6778baf7cc1f /arch
parentLinus 5.3-rc1 (diff)
downloadlinux-7b5ab6437961f5e37ab9adfae18cf1671e39e7a3.tar.xz
linux-7b5ab6437961f5e37ab9adfae18cf1671e39e7a3.zip
ARM: davinci: da850-evm: model the backlight GPIO as an actual device
Instead of enabling the panel backlight in a callback defined in board file using deprecated legacy GPIO API calls, model the line as a GPIO backlight device. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-davinci/board-da850-evm.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 0628e7d7dcf3..ac05d4838f1e 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -36,6 +36,7 @@
#include <linux/platform_data/ti-aemif.h>
#include <linux/platform_data/spi-davinci.h>
#include <linux/platform_data/uio_pruss.h>
+#include <linux/property.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/tps6507x.h>
#include <linux/regulator/fixed.h>
@@ -804,34 +805,49 @@ static const short da850_evm_mmcsd0_pins[] __initconst = {
static void da850_panel_power_ctrl(int val)
{
- /* lcd backlight */
- gpio_set_value(DA850_LCD_BL_PIN, val);
-
/* lcd power */
gpio_set_value(DA850_LCD_PWR_PIN, val);
}
+static struct property_entry da850_lcd_backlight_props[] = {
+ PROPERTY_ENTRY_BOOL("default-on"),
+ { }
+};
+
+static struct gpiod_lookup_table da850_lcd_backlight_gpio_table = {
+ .dev_id = "gpio-backlight",
+ .table = {
+ GPIO_LOOKUP("davinci_gpio", DA850_LCD_BL_PIN, NULL, 0),
+ { }
+ },
+};
+
+static const struct platform_device_info da850_lcd_backlight_info = {
+ .name = "gpio-backlight",
+ .id = PLATFORM_DEVID_NONE,
+ .properties = da850_lcd_backlight_props,
+};
+
static int da850_lcd_hw_init(void)
{
+ struct platform_device *backlight;
int status;
- status = gpio_request(DA850_LCD_BL_PIN, "lcd bl");
- if (status < 0)
- return status;
+ gpiod_add_lookup_table(&da850_lcd_backlight_gpio_table);
+ backlight = platform_device_register_full(&da850_lcd_backlight_info);
+ if (IS_ERR(backlight))
+ return PTR_ERR(backlight);
status = gpio_request(DA850_LCD_PWR_PIN, "lcd pwr");
- if (status < 0) {
- gpio_free(DA850_LCD_BL_PIN);
+ if (status < 0)
return status;
- }
- gpio_direction_output(DA850_LCD_BL_PIN, 0);
gpio_direction_output(DA850_LCD_PWR_PIN, 0);
- /* Switch off panel power and backlight */
+ /* Switch off panel power */
da850_panel_power_ctrl(0);
- /* Switch on panel power and backlight */
+ /* Switch on panel power */
da850_panel_power_ctrl(1);
return 0;