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mmc: am654_sdhci: Add a platform specific set_control_reg() callback

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Add a platform specific set_control_reg() callback to help switch to
UHS speed modes.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Faiz Abbas 2019-06-11 00:43:41 +05:30 committed by Tom Rini
parent d1c0a2200a
commit f605807f3d
1 changed files with 17 additions and 1 deletions
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18
drivers/mmc/am654_sdhci.c
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@ -75,6 +75,21 @@ struct am654_sdhci_plat {
bool dll_on;
};
static void am654_sdhci_set_control_reg(struct sdhci_host *host)
{
struct mmc *mmc = (struct mmc *)host->mmc;
u32 reg;
if (IS_SD(host->mmc) &&
mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
reg |= SDHCI_CTRL_VDD_180;
sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
}
sdhci_set_uhs_timing(host);
}
static int am654_sdhci_set_ios_post(struct sdhci_host *host)
{
struct udevice *dev = host->mmc->dev;
@ -143,7 +158,8 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host)
}
const struct sdhci_ops am654_sdhci_ops = {
.set_ios_post = &am654_sdhci_set_ios_post,
.set_ios_post = &am654_sdhci_set_ios_post,
.set_control_reg = &am654_sdhci_set_control_reg,
};
int am654_sdhci_init(struct am654_sdhci_plat *plat)