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mmc: core: add support for eMMC Dual Data Rate

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eMMC voltage change not required for 1.8V.  3.3V and 1.8V vcc
are capable of doing DDR. vccq of 1.8v is not required.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Reviewed-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Philip Rakity
2011-05-13 11:17:18 +05:30
committed by Chris Ball
parent 261bbd463a
commit 4c4cb17105
4 changed files with 33 additions and 19 deletions
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14
drivers/mmc/core/core.c
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@@ -717,23 +717,13 @@ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
mmc_set_ios(host);
}
/*
* Change data bus width and DDR mode of a host.
*/
void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width,
unsigned int ddr)
{
host->ios.bus_width = width;
host->ios.ddr = ddr;
mmc_set_ios(host);
}
/*
* Change data bus width of a host.
*/
void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
{
mmc_set_bus_width_ddr(host, width, MMC_SDR_MODE);
host->ios.bus_width = width;
mmc_set_ios(host);
}
/**