[PATCH v2 4/6] mmc: msm_sdhci: Reset clocks before reconfiguration

[Varadarajan Narayanan]

U-Boot has to reconfigure the clocks that were set in the boot
loaders. However, in IPQ9574, the clocks have to be reset before
they can be reconfigured. Hence add code to do the relevant
resets.

Reviewed-by: Caleb Connolly <caleb.connolly at linaro.org>
Signed-off-by: Varadarajan Narayanan <quic_varada at quicinc.com>
---
 drivers/mmc/msm_sdhci.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mmc/msm_sdhci.c b/drivers/mmc/msm_sdhci.c
index 27bb7052fc..ac77fb06bf 100644
--- a/drivers/mmc/msm_sdhci.c
+++ b/drivers/mmc/msm_sdhci.c
@@ -10,6 +10,7 @@
 #include <clk.h>
 #include <dm.h>
 #include <malloc.h>
+#include <reset.h>
 #include <sdhci.h>
 #include <wait_bit.h>
 #include <asm/global_data.h>
@@ -153,9 +154,18 @@ static int msm_sdc_probe(struct udevice *dev)
 	const struct msm_sdhc_variant_info *var_info;
 	struct sdhci_host *host = &prv->host;
 	u32 core_version, core_minor, core_major;
+	struct reset_ctl bcr_rst;
 	u32 caps;
 	int ret;
 
+	ret = reset_get_by_index(dev, 0, &bcr_rst);
+	if (!ret) {
+		reset_assert(&bcr_rst);
+		udelay(200);
+		reset_deassert(&bcr_rst);
+		udelay(200);
+	}
+
 	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_BROKEN_R1B;
 
 	host->max_clk = 0;
-- 
2.34.1