mmc: sdhci-msm: Introduce new ops to dump vendor specific registers

Introduce new sdhci ops to dump vendor specific registers in the
sdhci_dumpregs during error.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1590139950-7288-8-git-send-email-sartgarg@codeaurora.orgSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci.c

@@ -111,6 +111,9 @@ void sdhci_dumpregs(struct sdhci_host *host)
 		}
 	}
 
+	if (host->ops->dump_vendor_regs)
+		host->ops->dump_vendor_regs(host);
+
 	SDHCI_DUMP("============================================\n");
 }
 EXPORT_SYMBOL_GPL(sdhci_dumpregs);

drivers/mmc/host/sdhci.h

@@ -650,6 +650,7 @@ struct sdhci_ops {
 					 unsigned int length);
 	void	(*request_done)(struct sdhci_host *host,
 				struct mmc_request *mrq);
+	void    (*dump_vendor_regs)(struct sdhci_host *host);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS