From 2d4d6937720ba4cb4c8593b802d06ccb716a2002 Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Thu, 14 Jun 2018 18:45:21 +0800 Subject: [PATCH] mmc: dwmmc: socfpga: Add reset ctrl to driver Add code to reset all reset signals as in mmc DT node. A reset property is an optional feature, so only print out a warning and do not fail if a reset property is not present. If a reset property is discovered, then use it to deassert, thus bringing the IP out of reset. Signed-off-by: Ley Foon Tan Reviewed-by: Simon Glass --- drivers/mmc/socfpga_dw_mmc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c index d0a0362d7e..ed8ba10c93 100644 --- a/drivers/mmc/socfpga_dw_mmc.c +++ b/drivers/mmc/socfpga_dw_mmc.c @@ -13,6 +13,7 @@ #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; @@ -33,6 +34,20 @@ struct dwmci_socfpga_priv_data { unsigned int smplsel; }; +static void socfpga_dwmci_reset(struct udevice *dev) +{ + struct reset_ctl_bulk reset_bulk; + int ret; + + ret = reset_get_bulk(dev, &reset_bulk); + if (ret) { + dev_warn(dev, "Can't get reset: %d\n", ret); + return; + } + + reset_deassert_bulk(&reset_bulk); +} + static void socfpga_dwmci_clksel(struct dwmci_host *host) { struct dwmci_socfpga_priv_data *priv = host->priv; @@ -109,6 +124,8 @@ static int socfpga_dwmmc_probe(struct udevice *dev) struct dwmci_socfpga_priv_data *priv = dev_get_priv(dev); struct dwmci_host *host = &priv->host; + socfpga_dwmci_reset(dev); + #ifdef CONFIG_BLK dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, 400000); host->mmc = &plat->mmc; -- 2.39.5