mmc: arm_pl180_mmci: add bus_width DT property support
Allow to get "bus-width" property from device tree
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c
index b3c1f0d..fd57b55 100644
--- a/drivers/mmc/arm_pl180_mmci.c
+++ b/drivers/mmc/arm_pl180_mmci.c
@@ -408,6 +408,7 @@
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = &pdata->mmc;
struct pl180_mmc_host *host = mmc->priv;
+ u32 bus_width;
int ret;
strcpy(host->name, "MMC");
@@ -421,6 +422,21 @@
host->clock_max = dev_read_u32_default(dev, "max-frequency",
MMC_CLOCK_MAX);
host->version2 = dev_get_driver_data(dev);
+
+ bus_width = dev_read_u32_default(dev, "bus-width", 1);
+ switch (bus_width) {
+ case 8:
+ host->caps |= MMC_MODE_8BIT;
+ /* Hosts capable of 8-bit transfers can also do 4 bits */
+ case 4:
+ host->caps |= MMC_MODE_4BIT;
+ break;
+ case 1:
+ break;
+ default:
+ dev_err(dev, "Invalid bus-width value %u\n", bus_width);
+ }
+
ret = arm_pl180_mmci_init(host, &mmc);
if (ret) {
dev_err(dev, "arm_pl180_mmci init failed\n");