mmc: msm_sdhci: Reset clocks before reconfiguration

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@linaro.org>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20250226064505.1178054-7-quic_varada@quicinc.com
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

diff --git a/drivers/mmc/msm_sdhci.c b/drivers/mmc/msm_sdhci.c
index 27bb705..ac77fb0 100644 (file)
--- 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;