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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>
This commit is contained in:
Dmitry Eremin-Solenikov 2013-11-26 11:09:01 +01:00 committed by Russell King
parent 22564bde0b
commit 5f72d85e28
1 changed files with 27 additions and 8 deletions
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35
arch/arm/mach-sa1100/h3100.c
View File

@ -28,15 +28,35 @@
/* /*
* helper for sa1100fb * 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) static void h3100_lcd_power(int enable)
{ {
if (!gpio_request(H3XXX_EGPIO_LCD_ON, "LCD ON")) { if (!h3100_lcd_request())
gpio_set_value(H3100_GPIO_LCD_3V_ON, enable); return;
gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
gpio_free(H3XXX_EGPIO_LCD_ON); gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
} else { gpio_set_value(H3XXX_EGPIO_LCD_ON, enable);
pr_err("%s: can't request H3XXX_EGPIO_LCD_ON\n", __func__);
}
} }
static struct sa1100fb_mach_info h3100_lcd_info = { 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_DCD, GPIO_MODE_IN, "COM DCD" },
{ H3XXX_GPIO_COM_CTS, GPIO_MODE_IN, "COM CTS" }, { H3XXX_GPIO_COM_CTS, GPIO_MODE_IN, "COM CTS" },
{ H3XXX_GPIO_COM_RTS, GPIO_MODE_OUT0, "COM RTS" }, { 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) static void __init h3100_mach_init(void)