mmc: sdhci: Add quirk to indicate MMC_RSP_136 has CRC

TI's implementation of sdhci controller used in DRA7 SoC's has
CRC in responses with length 136 bits. Add quirk to indicate
the controller has CRC in MMC_RSP_136. If this quirk is
set sdhci library shouldn't shift the response present in
SDHCI_RESPONSE register.

Signed-off-by: Kishon Vijay Abraham I <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>

Author: kishon

drivers/mmc/host/sdhci.c

@@ -1182,6 +1182,9 @@ static void sdhci_read_rsp_136(struct sdhci_host *host, struct mmc_command *cmd)
 		cmd->resp[i] = sdhci_readl(host, reg);
 	}
 
+	if (host->quirks2 & SDHCI_QUIRK2_RSP_136_HAS_CRC)
+		return;
+
 	/* CRC is stripped so we need to do some shifting */
 	for (i = 0; i < 4; i++) {
 		cmd->resp[i] <<= 8;

drivers/mmc/host/sdhci.h

@@ -435,6 +435,8 @@ struct sdhci_host {
 #define SDHCI_QUIRK2_ACMD23_BROKEN			(1<<14)
 /* Broken Clock divider zero in controller */
 #define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN		(1<<15)
+/* Controller has CRC in 136 bit Command Response */
+#define SDHCI_QUIRK2_RSP_136_HAS_CRC			(1<<16)
 
 	int irq;		/* Device IRQ */
 	void __iomem *ioaddr;	/* Mapped address */