ARM: 7898/1: sa1100: h3100: refactor LCD GPIO handling

As GPIOs are going to move to platform device, there is no guarantee
that they will be available at init_machine time.

Request all GPIOs directly in lcd_power callback and not at init_machine
time.

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>

1 files changed, 27 insertions, 8 deletions

diff --git a/arch/arm/mach-sa1100/h3100.c b/arch/arm/mach-sa1100/h3100.c
index b8f2b151539b..5b78c9f9a11d 100644
--- a/arch/arm/mach-sa1100/h3100.c
+++ b/arch/arm/mach-sa1100/h3100.c
@@ -28,15 +28,35 @@
 /*
  * helper for sa1100fb
  */
+static struct gpio h3100_lcd_gpio[] = {
+        { H3100_GPIO_LCD_3V_ON, GPIOF_OUT_INIT_LOW, "LCD 3V" },
+        { H3XXX_EGPIO_LCD_ON, GPIOF_OUT_INIT_LOW, "LCD ON" },
+};
+
+static bool h3100_lcd_request(void)
+{
+        static bool h3100_lcd_ok;
+        int rc;
+
+        if (h3100_lcd_ok)
+                return true;
+
+        rc = gpio_request_array(h3100_lcd_gpio, ARRAY_SIZE(h3100_lcd_gpio));
+        if (rc)
+                pr_err("%s: can't request GPIOs\n", __func__);
+        else
+                h3100_lcd_ok = true;
+
+        return h3100_lcd_ok;
+}
+
 static void h3100_lcd_power(int enable)
 {
-        if (!gpio_request(H3XXX_EGPIO_LCD_ON, "LCD ON")) {
-                gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
-                gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
-                gpio_free(H3XXX_EGPIO_LCD_ON);
-        } else {
-                pr_err("%s: can't request H3XXX_EGPIO_LCD_ON\n", __func__);
-        }
+        if (!h3100_lcd_request())
+                return;
+
+        gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
+        gpio_set_value(H3XXX_EGPIO_LCD_ON, enable);
 }
 
 static struct sa1100fb_mach_info h3100_lcd_info = {
@@ -91,7 +111,6 @@ static struct gpio_default_state h3100_default_gpio[] = {
         { H3XXX_GPIO_COM_DCD,   GPIO_MODE_IN,   "COM DCD" },
         { H3XXX_GPIO_COM_CTS,   GPIO_MODE_IN,   "COM CTS" },
         { H3XXX_GPIO_COM_RTS,   GPIO_MODE_OUT0, "COM RTS" },
-        { H3100_GPIO_LCD_3V_ON, GPIO_MODE_OUT0, "LCD 3v" },
 };
 
 static void __init h3100_mach_init(void)