mmc: sdhci-iproc: support standard byte register accesses

Add bytewise register accesses support for newer versions of IPROC
SDHCI controllers.
Previous sdhci-iproc versions of SDIO controllers
(such as Raspberry Pi and Cygnus) only allowed for 32-bit register
accesses.

Signed-off-by: Srinath Mannam <[e-mail]>
Signed-off-by: Scott Branden <[e-mail]>
Acked-by: Adrian Hunter <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/sdhci-iproc.c

···
 }
 
 static const struct sdhci_ops sdhci_iproc_ops = {
+	.set_clock = sdhci_set_clock,
+	.get_max_clock = sdhci_pltfm_clk_get_max_clock,
+	.set_bus_width = sdhci_set_bus_width,
+	.reset = sdhci_reset,
+	.set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_ops sdhci_iproc_32only_ops = {
 	.read_l = sdhci_iproc_readl,
 	.read_w = sdhci_iproc_readw,
 	.read_b = sdhci_iproc_readb,
···
 	.set_bus_width = sdhci_set_bus_width,
 	.reset = sdhci_reset,
 	.set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_pltfm_data sdhci_iproc_cygnus_pltfm_data = {
+	.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
+	.quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN,
+	.ops = &sdhci_iproc_32only_ops,
+};
+
+static const struct sdhci_iproc_data iproc_cygnus_data = {
+	.pdata = &sdhci_iproc_cygnus_pltfm_data,
+	.caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
+			& SDHCI_MAX_BLOCK_MASK) |
+		SDHCI_CAN_VDD_330 |
+		SDHCI_CAN_VDD_180 |
+		SDHCI_CAN_DO_SUSPEND |
+		SDHCI_CAN_DO_HISPD |
+		SDHCI_CAN_DO_ADMA2 |
+		SDHCI_CAN_DO_SDMA,
+	.caps1 = SDHCI_DRIVER_TYPE_C |
+		 SDHCI_DRIVER_TYPE_D |
+		 SDHCI_SUPPORT_DDR50,
+	.mmc_caps = MMC_CAP_1_8V_DDR,
 };
 
 static const struct sdhci_pltfm_data sdhci_iproc_pltfm_data = {
···
 	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 		  SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
 		  SDHCI_QUIRK_MISSING_CAPS,
-	.ops = &sdhci_iproc_ops,
+	.ops = &sdhci_iproc_32only_ops,
 };
 
 static const struct sdhci_iproc_data bcm2835_data = {
···
 
 static const struct of_device_id sdhci_iproc_of_match[] = {
 	{ .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
-	{ .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_data },
+	{ .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data},
+	{ .compatible = "brcm,sdhci-iproc", .data = &iproc_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);