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 ley.foon.tan@intel.com Reviewed-by: Simon Glass sjg@chromium.org
--- v3: - Removed #ifdef CONFIG_DM_RESET switch.
v5: - Added Simon's Reviewed-by. --- 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 d0a0362..4be4eb5 100644 --- a/drivers/mmc/socfpga_dw_mmc.c +++ b/drivers/mmc/socfpga_dw_mmc.c @@ -13,6 +13,7 @@ #include <linux/libfdt.h> #include <linux/err.h> #include <malloc.h> +#include <reset.h>
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;