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| author | Philip Rakity <prakity@marvell.com> | 2010-09-23 08:24:32 -0700 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-10-23 21:11:20 +0800 |
| commit | 643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3 (patch) | |
| tree | 594e014da8c4dcfc3d029bd7fe328f7e70e4b038 /drivers/mmc/host/sdhci.c | |
| parent | 3ab9c8dad6444007700b5949ec80cfdc823d31b4 (diff) | |
| download | kernel_samsung_smdk4412-643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3.zip kernel_samsung_smdk4412-643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3.tar.gz kernel_samsung_smdk4412-643a81ff3c5a89ae5c0768f89b29d3e1d08be5c3.tar.bz2 | |
mmc: sdhci: allow for eMMC 74 clock generation by controller
Snippet of code for how adaptation layer should handle the call:
/*
* eMMC spec calls for the host to send 74 clocks to the card
* during initialization, right after voltage stabilization.
* create the clocks manually right here.
*/
void generate_init_clocks_A0(struct sdhci_host *host, u8 power_mode)
{
struct sdhci_mmc_slot *slot = sdhci_priv(host);
if (slot->power_mode == MMC_POWER_UP &&
power_mode == MMC_POWER_ON) {
/* controller specific code here */
/* slot->power_mode holds previous power setting */
}
slot->power_mode = power_mode;
}
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 23358d3..9cb60ba 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1182,6 +1182,9 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) else sdhci_set_power(host, ios->vdd); + if (host->ops->platform_send_init_74_clocks) + host->ops->platform_send_init_74_clocks(host, ios->power_mode); + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); if (ios->bus_width == MMC_BUS_WIDTH_8) |