mmc: mxs-mmc: get rid of the use of cpu_is_xxx

The register HW_SSP_VERSION is broken for ssp version detection,
as the address of the register is different between imx23 and imx28.
Let's use platform_device_id to detect the device, so that the use
of cpu_is_xxx can be removed.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Chris Ball <cjb@laptop.org>

arch/arm/mach-mxs/devices/platform-mxs-mmc.c

@@ -17,32 +17,33 @@
 #include <mach/mx28.h>
 #include <mach/devices-common.h>
 
-#define mxs_mxs_mmc_data_entry_single(soc, _id, hwid)			\
+#define mxs_mxs_mmc_data_entry_single(soc, _devid, _id, hwid)		\
 	{								\
+		.devid = _devid,					\
 		.id = _id,						\
 		.iobase = soc ## _SSP ## hwid ## _BASE_ADDR,		\
 		.dma = soc ## _DMA_SSP ## hwid,				\
 		.irq_err = soc ## _INT_SSP ## hwid ## _ERROR,		\
 		.irq_dma = soc ## _INT_SSP ## hwid ## _DMA,		\
 	}
 
-#define mxs_mxs_mmc_data_entry(soc, _id, hwid)				\
-	[_id] = mxs_mxs_mmc_data_entry_single(soc, _id, hwid)
+#define mxs_mxs_mmc_data_entry(soc, _devid, _id, hwid)			\
+	[_id] = mxs_mxs_mmc_data_entry_single(soc, _devid, _id, hwid)
 
 
 #ifdef CONFIG_SOC_IMX23
 const struct mxs_mxs_mmc_data mx23_mxs_mmc_data[] __initconst = {
-	mxs_mxs_mmc_data_entry(MX23, 0, 1),
-	mxs_mxs_mmc_data_entry(MX23, 1, 2),
+	mxs_mxs_mmc_data_entry(MX23, "imx23-mmc", 0, 1),
+	mxs_mxs_mmc_data_entry(MX23, "imx23-mmc", 1, 2),
 };
 #endif
 
 #ifdef CONFIG_SOC_IMX28
 const struct mxs_mxs_mmc_data mx28_mxs_mmc_data[] __initconst = {
-	mxs_mxs_mmc_data_entry(MX28, 0, 0),
-	mxs_mxs_mmc_data_entry(MX28, 1, 1),
-	mxs_mxs_mmc_data_entry(MX28, 2, 2),
-	mxs_mxs_mmc_data_entry(MX28, 3, 3),
+	mxs_mxs_mmc_data_entry(MX28, "imx28-mmc", 0, 0),
+	mxs_mxs_mmc_data_entry(MX28, "imx28-mmc", 1, 1),
+	mxs_mxs_mmc_data_entry(MX28, "imx28-mmc", 2, 2),
+	mxs_mxs_mmc_data_entry(MX28, "imx28-mmc", 3, 3),
 };
 #endif
 
@@ -70,6 +71,6 @@ struct platform_device *__init mxs_add_mxs_mmc(
 		},
 	};
 
-	return mxs_add_platform_device("mxs-mmc", data->id,
+	return mxs_add_platform_device(data->devid, data->id,
 			res, ARRAY_SIZE(res), pdata, sizeof(*pdata));
 }

arch/arm/mach-mxs/include/mach/devices-common.h

@@ -89,6 +89,7 @@ struct platform_device * __init mxs_add_mxs_i2c(
 /* mmc */
 #include <mach/mmc.h>
 struct mxs_mxs_mmc_data {
+	const char *devid;
 	int id;
 	resource_size_t iobase;
 	resource_size_t dma;

drivers/clk/mxs/clk-imx23.c

@@ -93,8 +93,8 @@ static struct clk_lookup xbus_lookups[] __initdata = {
 };
 
 static struct clk_lookup ssp_lookups[] __initdata = {
-	{ .dev_id = "mxs-mmc.0", },
-	{ .dev_id = "mxs-mmc.1", },
+	{ .dev_id = "imx23-mmc.0", },
+	{ .dev_id = "imx23-mmc.1", },
 	{ .dev_id = "80010000.ssp", },
 	{ .dev_id = "80034000.ssp", },
 };

drivers/clk/mxs/clk-imx28.c

@@ -148,22 +148,22 @@ static struct clk_lookup xbus_lookups[] __initdata = {
 };
 
 static struct clk_lookup ssp0_lookups[] __initdata = {
-	{ .dev_id = "mxs-mmc.0", },
+	{ .dev_id = "imx28-mmc.0", },
 	{ .dev_id = "80010000.ssp", },
 };
 
 static struct clk_lookup ssp1_lookups[] __initdata = {
-	{ .dev_id = "mxs-mmc.1", },
+	{ .dev_id = "imx28-mmc.1", },
 	{ .dev_id = "80012000.ssp", },
 };
 
 static struct clk_lookup ssp2_lookups[] __initdata = {
-	{ .dev_id = "mxs-mmc.2", },
+	{ .dev_id = "imx28-mmc.2", },
 	{ .dev_id = "80014000.ssp", },
 };
 
 static struct clk_lookup ssp3_lookups[] __initdata = {
-	{ .dev_id = "mxs-mmc.3", },
+	{ .dev_id = "imx28-mmc.3", },
 	{ .dev_id = "80016000.ssp", },
 };
 

drivers/mmc/host/mxs-mmc.c

@@ -42,16 +42,14 @@
 #include <linux/pinctrl/consumer.h>
 #include <linux/stmp_device.h>
 
-#include <mach/mxs.h>
 #include <mach/mmc.h>
 
 #define DRIVER_NAME	"mxs-mmc"
 
 /* card detect polling timeout */
 #define MXS_MMC_DETECT_TIMEOUT			(HZ/2)
 
-#define SSP_VERSION_LATEST	4
-#define ssp_is_old(host)	((host)->version < SSP_VERSION_LATEST)
+#define ssp_is_old(host)	((host)->devid == IMX23_MMC)
 
 /* SSP registers */
 #define HW_SSP_CTRL0				0x000
@@ -123,8 +121,6 @@
 #define HW_SSP_STATUS(h)			(ssp_is_old(h) ? 0x0c0 : 0x100)
 #define  BM_SSP_STATUS_CARD_DETECT		(1 << 28)
 #define  BM_SSP_STATUS_SDIO_IRQ			(1 << 17)
-#define HW_SSP_VERSION				(cpu_is_mx23() ? 0x110 : 0x130)
-#define  BP_SSP_VERSION_MAJOR			(24)
 
 #define BF_SSP(value, field)	(((value) << BP_SSP_##field) & BM_SSP_##field)
 
@@ -139,6 +135,11 @@
 
 #define SSP_PIO_NUM	3
 
+enum mxs_mmc_id {
+	IMX23_MMC,
+	IMX28_MMC,
+};
+
 struct mxs_mmc_host {
 	struct mmc_host			*mmc;
 	struct mmc_request		*mrq;
@@ -158,7 +159,7 @@ struct mxs_mmc_host {
 	enum dma_transfer_direction	slave_dirn;
 	u32				ssp_pio_words[SSP_PIO_NUM];
 
-	unsigned int			version;
+	enum mxs_mmc_id			devid;
 	unsigned char			bus_width;
 	spinlock_t			lock;
 	int				sdio_irq_en;
@@ -678,6 +679,19 @@ static bool mxs_mmc_dma_filter(struct dma_chan *chan, void *param)
 	return true;
 }
 
+static struct platform_device_id mxs_mmc_ids[] = {
+	{
+		.name = "imx23-mmc",
+		.driver_data = IMX23_MMC,
+	}, {
+		.name = "imx28-mmc",
+		.driver_data = IMX28_MMC,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, mxs_mmc_ids);
+
 static int mxs_mmc_probe(struct platform_device *pdev)
 {
 	struct mxs_mmc_host *host;
@@ -712,10 +726,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
 		goto out_mmc_free;
 	}
 
-	/* only major verion does matter */
-	host->version = readl(host->base + HW_SSP_VERSION) >>
-			BP_SSP_VERSION_MAJOR;
-
+	host->devid = pdev->id_entry->driver_data;
 	host->mmc = mmc;
 	host->res = r;
 	host->dma_res = dmares;
@@ -866,6 +877,7 @@ static const struct dev_pm_ops mxs_mmc_pm_ops = {
 static struct platform_driver mxs_mmc_driver = {
 	.probe		= mxs_mmc_probe,
 	.remove		= mxs_mmc_remove,
+	.id_table	= mxs_mmc_ids,
 	.driver		= {
 		.name	= DRIVER_NAME,
 		.owner	= THIS_MODULE,