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Commit 8ccfd3f0 authored by Vipin Bhandari's avatar Vipin Bhandari Committed by Kevin Hilman
Browse files

davinci: da830/omap-l137 evm: add support for GPIO based MMC/SD card detection 



The DA830/OMAP-L137 EVM has GPIO based card detection logic, but the current
code does not use it.

Add support for GPIO based card detection to avoid reading the card to see
if a card is present or not.

Signed-off-by: default avatarVipin Bhandari <vipin.bhandari@ti.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 21ce873d

arch/arm/mach-davinci/board-da830-evm.c

+15 −0
Original line number Diff line number Diff line
@@ -229,14 +229,21 @@ static const short da830_evm_mmc_sd_pins[] = { 
};



#define DA830_MMCSD_WP_PIN		GPIO_TO_PIN(2, 1)

#define DA830_MMCSD_CD_PIN		GPIO_TO_PIN(2, 2)



static int da830_evm_mmc_get_ro(int index)

{

	return gpio_get_value(DA830_MMCSD_WP_PIN);

}



static int da830_evm_mmc_get_cd(int index)

{

	return !gpio_get_value(DA830_MMCSD_CD_PIN);

}



static struct davinci_mmc_config da830_evm_mmc_config = {

	.get_ro			= da830_evm_mmc_get_ro,

	.get_cd			= da830_evm_mmc_get_cd,

	.wires			= 4,

	.max_freq		= 50000000,

	.caps			= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
@@ -262,6 +269,14 @@ static inline void da830_evm_init_mmc(void) 
	}

	gpio_direction_input(DA830_MMCSD_WP_PIN);



	ret = gpio_request(DA830_MMCSD_CD_PIN, "MMC CD\n");

	if (ret) {

		pr_warning("da830_evm_init: can not open GPIO %d\n",

			   DA830_MMCSD_CD_PIN);

		return;

	}

	gpio_direction_input(DA830_MMCSD_CD_PIN);



	ret = da8xx_register_mmcsd0(&da830_evm_mmc_config);

	if (ret) {

		pr_warning("da830_evm_init: mmc/sd registration failed: %d\n",