From 9035bb7432d33014fd131390c635e634aaacd4d0 Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Mon, 23 Oct 2017 10:57:32 +0200 Subject: [PATCH] mmc: arm_pl180_mmci: add bus_width DT property support Allow to get "bus-width" property from device tree Signed-off-by: Patrice Chotard --- 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 b3c1f0ddcb..fd57b55848 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"); -- 2.39.5