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authorIdo Yariv <ido@wizery.com>2011-07-28 20:49:09 +0000
committerSekhar Nori <nsekhar@ti.com>2011-09-17 15:53:23 +0530
commit4a9de8ad2cea3c952e8b1cff8aa9289cd9d66c62 (patch)
treeaeda6998868a604d0bac882206f18dab598b5cbc /drivers/mmc
parent6836989c35b285b566b932fdbb8402edf8fcc887 (diff)
downloadblackbird-op-linux-4a9de8ad2cea3c952e8b1cff8aa9289cd9d66c62.tar.gz
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mmc: davinci: Add support for set_power callback
Some devices connected to the MMC bus are power controlled by external means. For instance, an SDIO device may be powered down/up by an external gpio line. In order to avoid toggling power from within the MMC host driver, add a set_power callback function, which will be called by set_ios upon powering down/up. Signed-off-by: Ido Yariv <ido@wizery.com> CC: Chris Ball <cjb@laptop.org> Acked-by: Chris Ball <cjb@laptop.org> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/davinci_mmc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 0076c7448fe6..64a8325a4a8a 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -807,12 +807,25 @@ static void calculate_clk_divider(struct mmc_host *mmc, struct mmc_ios *ios)
static void mmc_davinci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct mmc_davinci_host *host = mmc_priv(mmc);
+ struct platform_device *pdev = to_platform_device(mmc->parent);
+ struct davinci_mmc_config *config = pdev->dev.platform_data;
dev_dbg(mmc_dev(host->mmc),
"clock %dHz busmode %d powermode %d Vdd %04x\n",
ios->clock, ios->bus_mode, ios->power_mode,
ios->vdd);
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ if (config && config->set_power)
+ config->set_power(pdev->id, false);
+ break;
+ case MMC_POWER_UP:
+ if (config && config->set_power)
+ config->set_power(pdev->id, true);
+ break;
+ }
+
switch (ios->bus_width) {
case MMC_BUS_WIDTH_8:
dev_dbg(mmc_dev(host->mmc), "Enabling 8 bit mode\n");
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