From: Patrice Chotard <patrice.chot...@st.com>
Allow to get "bus-width" property from device tree
Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
drivers/mmc/arm_pl180_mmci.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c
index 61dbbfb..6ee77b1 100644
--- a/drivers/mmc/arm_pl180_mmci.c
+++ b/drivers/mmc/arm_pl180_mmci.c
@@ -405,6 +405,7 @@ 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");
@@ -417,6 +418,22 @@ static int arm_pl180_mmc_probe(struct udevice *dev)
host->clock_min = 400000;
host->clock_max = dev_read_u32_default(dev, "max-frequency", 48000000);
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);
+ return -EINVAL;
+ }
+
ret = arm_pl180_mmci_init(host, &mmc);
if (ret) {
dev_err(dev, "arm_pl180_mmci init failed\n");
--
1.9.1
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