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mmc: sdhci-msm: Add dual voltage capability

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SDCC5 controller doesn't advertise 1.8v capability by default.
Dual voltage capability is required for SD3.0 support. Add this
capability for controllers that support this based on
device tree configuration.

Change-Id: Ie4cd6db2e7230bc22cd393c8e37d99f49c777cd0
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
This commit is contained in:
Venkat Gopalakrishnan 2014-08-28 18:15:45 -07:00 • committed by Subhash Jadavani
parent 9ce1e0b186
commit 9e36f69ea1
1 changed files with 11 additions and 2 deletions
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13
drivers/mmc/host/sdhci-msm.c
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@ -2746,11 +2746,20 @@ static void sdhci_set_default_hw_caps(struct sdhci_msm_host *msm_host,
/*
* Starting with SDCC 5 controller (core major version = 1)
* controller won't advertise 3.0v and 8-bit features except for
* some targets.
* controller won't advertise 3.0v, 1.8v and 8-bit features
* except for some targets.
*/
if (major >= 1 && minor != 0x11 && minor != 0x12) {
struct sdhci_msm_reg_data *vdd_io_reg;
caps = CORE_3_0V_SUPPORT;
/*
* Enable 1.8V support capability on controllers that
* support dual voltage
*/
vdd_io_reg = msm_host->pdata->vreg_data->vdd_io_data;
if (vdd_io_reg &&
(vdd_io_reg->low_vol_level != vdd_io_reg->high_vol_level))
caps |= CORE_1_8V_SUPPORT;
if (msm_host->pdata->mmc_bus_width == MMC_CAP_8_BIT_DATA)
caps |= CORE_8_BIT_SUPPORT;
writel_relaxed(