sunxi: display: Fix gpio handling to work with the driver-model

The driver-model gpio functions may return another value then -1 as error,
make the sunxi display code properly handle this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c
index 1163ecf..48dbdf5 100644 (file)
--- a/drivers/video/sunxi_display.c
+++ b/drivers/video/sunxi_display.c
@@ -600,19 +600,19 @@ static void sunxi_lcdc_panel_enable(void)
         * white while the lcd inits.
         */
        pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_EN);
-       if (pin != -1) {
+       if (pin >= 0) {
                gpio_request(pin, "lcd_backlight_enable");
                gpio_direction_output(pin, 0);
        }
 
        pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_PWM);
-       if (pin != -1) {
+       if (pin >= 0) {
                gpio_request(pin, "lcd_backlight_pwm");
                gpio_direction_output(pin, PWM_OFF);
        }
 
        reset_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_RESET);
-       if (reset_pin != -1) {
+       if (reset_pin >= 0) {
                gpio_request(reset_pin, "lcd_reset");
                gpio_direction_output(reset_pin, 0); /* Assert reset */
        }
@@ -620,12 +620,12 @@ static void sunxi_lcdc_panel_enable(void)
        /* Give the backlight some time to turn off and power up the panel. */
        mdelay(40);
        pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_POWER);
-       if (pin != -1) {
+       if (pin >= 0) {
                gpio_request(pin, "lcd_power");
                gpio_direction_output(pin, 1);
        }
 
-       if (reset_pin != -1)
+       if (reset_pin >= 0)
                gpio_direction_output(reset_pin, 1); /* De-assert reset */
 }
 
@@ -640,11 +640,11 @@ static void sunxi_lcdc_backlight_enable(void)
        mdelay(40);
 
        pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_EN);
-       if (pin != -1)
+       if (pin >= 0)
                gpio_direction_output(pin, 1);
 
        pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_PWM);
-       if (pin != -1)
+       if (pin >= 0)
                gpio_direction_output(pin, PWM_ON);
 }
 
@@ -961,7 +961,7 @@ static void sunxi_vga_external_dac_enable(void)
        int pin;
 
        pin = sunxi_name_to_gpio(CONFIG_VIDEO_VGA_EXTERNAL_DAC_EN);
-       if (pin != -1) {
+       if (pin >= 0) {
                gpio_request(pin, "vga_enable");
                gpio_direction_output(pin, 1);
        }