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omap: Fix MMC gpio_wp for BeagleBoard C2 and above

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Earlier BeagleBoards were using pad AH8 muxed to GPIO29 for MMC write-protect.
However, this signal has been changed to pad AG9 in board revision C2.

Fix this by adding mux configuration for pad AG9, runtime check for board
revisions and set the gpio number and pad muxing accordingly.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Jarkko Nikula 2009-09-24 16:23:17 -07:00 committed by Tony Lindgren
parent 4f5433324d
commit 44e74840d6
3 changed files with 9 additions and 1 deletions
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7
arch/arm/mach-omap2/board-omap3beagle.c
View File

@ -139,8 +139,13 @@ static struct gpio_led gpio_leds[];
static int beagle_twl_gpio_setup(struct device *dev,
unsigned gpio, unsigned ngpio)
{
if (system_rev >= 0x20 && system_rev <= 0x34301000) {
omap_cfg_reg(AG9_34XX_GPIO23);
mmc[0].gpio_wp = 23;
} else {
omap_cfg_reg(AH8_34XX_GPIO29);
}
/* gpio + 0 is "mmc0_cd" (input/IRQ) */
omap_cfg_reg(AH8_34XX_GPIO29);
mmc[0].gpio_cd = gpio + 0;
twl4030_mmc_init(mmc);

2
arch/arm/mach-omap2/mux.c
View File

@ -460,6 +460,8 @@ MUX_CFG_34XX("AF26_34XX_GPIO0", 0x1e0,
OMAP34XX_MUX_MODE4 | OMAP34XX_PIN_INPUT)
MUX_CFG_34XX("AF22_34XX_GPIO9", 0xa18,
OMAP34XX_MUX_MODE4 | OMAP34XX_PIN_INPUT)
MUX_CFG_34XX("AG9_34XX_GPIO23", 0x5ee,
OMAP34XX_MUX_MODE4 | OMAP34XX_PIN_INPUT)
MUX_CFG_34XX("AH8_34XX_GPIO29", 0x5fa,
OMAP34XX_MUX_MODE4 | OMAP34XX_PIN_INPUT)
MUX_CFG_34XX("U8_34XX_GPIO54_OUT", 0x0b4,

1
arch/arm/plat-omap/include/mach/mux.h
View File

@ -840,6 +840,7 @@ enum omap34xx_index {
*/
AF26_34XX_GPIO0,
AF22_34XX_GPIO9,
AG9_34XX_GPIO23,
AH8_34XX_GPIO29,
U8_34XX_GPIO54_OUT,
U8_34XX_GPIO54_DOWN,