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 b3c1f0ddcb938351290c143c3d04e31bc0e185bb..fd57b55848b66131d5240db64ce376b1fb453ce8 100644 (file)
--- a/drivers/mmc/arm_pl180_mmci.c
+++ b/drivers/mmc/arm_pl180_mmci.c
@@ -408,6 +408,7 @@ static int arm_pl180_mmc_probe(struct udevice *dev)
        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 @@ static int arm_pl180_mmc_probe(struct udevice *dev)
        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");