On 10/19/2017 11:46 PM, patrice.chotard@st.com wrote:
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
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);
Doesn't need to return -EINVAL..It can be run with 1bit BUSWIDTH. I think that it's enough to display the error message.
return -EINVAL;- }
- ret = arm_pl180_mmci_init(host, &mmc); if (ret) { dev_err(dev, "arm_pl180_mmci init failed\n");