mmc: mv_sdhci: Fix host version read for Armada100

sdhci_readw does not work for host version read in Armada100 series
SoCs. This patch fix this issue by making a sdhci_readl call to get host
version.

Signed-off-by: Ajay Bhargav <ajay.bhargav@einfochips.com>

drivers/mmc/mv_sdhci.c

@@ -48,7 +48,10 @@ int mv_sdh_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks)
 		mv_ops.write_b = mv_sdhci_writeb;
 	host->ops = &mv_ops;
 #endif
-	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
+	if (quirks & SDHCI_QUIRK_REG32_RW)
+		host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
+	else
+		host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
 	add_sdhci(host, max_clk, min_clk);
 	return 0;
 }

include/sdhci.h

@@ -215,6 +215,7 @@
  * quirks
  */
 #define SDHCI_QUIRK_32BIT_DMA_ADDR	(1 << 0)
+#define SDHCI_QUIRK_REG32_RW		(1 << 1)
 
 /* to make gcc happy */
 struct sdhci_host;