ARM: 7899/1: sa1100: h3600: refactor LCD GPIO handling

Use gpio_request_array to request all GPIOs at once. Also don't call
gpio_free. There is little point freeing LCD gpios once they are
requested. Instead guard them with bool variable.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-sa1100/h3600.c b/arch/arm/mach-sa1100/h3600.c
index b8dc5bd..559c2a0 100644 (file)
--- a/arch/arm/mach-sa1100/h3600.c
+++ b/arch/arm/mach-sa1100/h3600.c
@@ -28,35 +28,39 @@
 /*
  * helper for sa1100fb
  */
+static struct gpio h3600_lcd_gpio[] = {
+       { H3XXX_EGPIO_LCD_ON,   GPIOF_OUT_INIT_LOW,     "LCD power" },
+       { H3600_EGPIO_LCD_PCI,  GPIOF_OUT_INIT_LOW,     "LCD control" },
+       { H3600_EGPIO_LCD_5V_ON, GPIOF_OUT_INIT_LOW,    "LCD 5v" },
+       { H3600_EGPIO_LVDD_ON,  GPIOF_OUT_INIT_LOW,     "LCD 9v/-6.5v" },
+};
+
+static bool h3600_lcd_request(void)
+{
+       static bool h3600_lcd_ok;
+       int rc;
+
+       if (h3600_lcd_ok)
+               return true;
+
+       rc = gpio_request_array(h3600_lcd_gpio, ARRAY_SIZE(h3600_lcd_gpio));
+       if (rc)
+               pr_err("%s: can't request GPIOs\n", __func__);
+       else
+               h3600_lcd_ok = true;
+
+       return h3600_lcd_ok;
+}
+
 static void h3600_lcd_power(int enable)
 {
-       if (gpio_request(H3XXX_EGPIO_LCD_ON, "LCD power")) {
-               pr_err("%s: can't request H3XXX_EGPIO_LCD_ON\n", __func__);
-               goto err1;
-       }
-       if (gpio_request(H3600_EGPIO_LCD_PCI, "LCD control")) {
-               pr_err("%s: can't request H3XXX_EGPIO_LCD_PCI\n", __func__);
-               goto err2;
-       }
-       if (gpio_request(H3600_EGPIO_LCD_5V_ON, "LCD 5v")) {
-               pr_err("%s: can't request H3XXX_EGPIO_LCD_5V_ON\n", __func__);
-               goto err3;
-       }
-       if (gpio_request(H3600_EGPIO_LVDD_ON, "LCD 9v/-6.5v")) {
-               pr_err("%s: can't request H3600_EGPIO_LVDD_ON\n", __func__);
-               goto err4;
-       }
+       if (!h3600_lcd_request())
+               return;
 
        gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
        gpio_direction_output(H3600_EGPIO_LCD_PCI, enable);
        gpio_direction_output(H3600_EGPIO_LCD_5V_ON, enable);
        gpio_direction_output(H3600_EGPIO_LVDD_ON, enable);
-
-       gpio_free(H3600_EGPIO_LVDD_ON);
-err4:  gpio_free(H3600_EGPIO_LCD_5V_ON);
-err3:  gpio_free(H3600_EGPIO_LCD_PCI);
-err2:  gpio_free(H3XXX_EGPIO_LCD_ON);
-err1:  return;
 }
 
 static const struct sa1100fb_rgb h3600_rgb_16 = {