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mfd: Correct ro and cd implemantion on DM355 

This patch corrects the support for MMCSD card detection
and read only feature for SoC DM355.

EVMDM355_ECP_VA4.pdf, from Spectrum digital, suggests that
Bit 2 and 4 should be checked for card detection. However
on the EVM, bits 1 and 3 gives this status, for MMC/SD
instance 0 and 1 respectively. The pdf also suggests that
Bit 1 and 3 should be checked for write protection. However
on the EVM bits 2 and 4 gives this status.

This document can be downloaded from
http://c6000.spectrumdigital.com/evmdm355/reve/files/EVMDM355_ECP_VA4.pdf

Signed-off-by: Vipin Bhandari <vipin.bhandari@ti.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Vipin Bhandari 2009-07-30 04:19:17 -04:00 committed by Samuel Ortiz
parent 8d360d8c03
commit 89a99e76f6
1 changed files with 10 additions and 2 deletions
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12
drivers/mfd/dm355evm_msp.c
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@ -107,8 +107,16 @@ static const u8 msp_gpios[] = {
MSP_GPIO(2, SWITCH1), MSP_GPIO(3, SWITCH1),
MSP_GPIO(4, SWITCH1),
/* switches on MMC/SD sockets */
MSP_GPIO(1, SDMMC), MSP_GPIO(2, SDMMC), /* mmc0 WP, nCD */
MSP_GPIO(3, SDMMC), MSP_GPIO(4, SDMMC), /* mmc1 WP, nCD */
/*
* Note: EVMDM355_ECP_VA4.pdf suggests that Bit 2 and 4 should be
* checked for card detection. However on the EVM bit 1 and 3 gives
* this status, for 0 and 1 instance respectively. The pdf also
* suggests that Bit 1 and 3 should be checked for write protection.
* However on the EVM bit 2 and 4 gives this status,for 0 and 1
* instance respectively.
*/
MSP_GPIO(2, SDMMC), MSP_GPIO(1, SDMMC), /* mmc0 WP, nCD */
MSP_GPIO(4, SDMMC), MSP_GPIO(3, SDMMC), /* mmc1 WP, nCD */
};
#define MSP_GPIO_REG(offset) (msp_gpios[(offset)] >> 3)