diff mbox series

[U-Boot,v6,12/15] mmc: am654_sdhci: Add a platform specific set_control_reg() callback

Message ID 20190604131700.29936-13-faiz_abbas@ti.com
State Superseded
Delegated to: Tom Rini
Headers show
Series Add Support for eMMC in Am65x-evm | expand

Commit Message

Faiz Abbas June 4, 2019, 1:16 p.m. UTC 
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>
---
 drivers/mmc/am654_sdhci.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c
index b9a7924d4e..fe633aa39a 100644
--- a/drivers/mmc/am654_sdhci.c
+++ b/drivers/mmc/am654_sdhci.c
@@ -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)