[PATCH 1/6] arm: sa1100: h3100: refactor LCD GPIO handling
Dmitry Eremin-Solenikov
dbaryshkov at gmail.com
Thu Nov 21 10:40:09 EST 2013
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 at gmail.com>
---
arch/arm/mach-sa1100/h3100.c | 35 +++++++++++++++++++++++++++--------
1 file changed, 27 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-sa1100/h3100.c b/arch/arm/mach-sa1100/h3100.c
index b8f2b15..5b78c9f 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)
--
1.8.4.2
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