From: Patrice Chotard patrice.chotard@st.com
Allow to get "bus-width" property from device tree
Signed-off-by: Patrice Chotard patrice.chotard@st.com ---
v2: _ remove useless return in bus_width switch case
drivers/mmc/arm_pl180_mmci.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
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 @@ 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");