mtd: mxc_nand: remove cpu_is_xxx by using platform_device_id

It changes the driver to use platform_device_id rather than cpu_is_xxx
to determine the controller type, and updates the platform code
accordingly.

As the result, mach/hardware.h inclusion gets removed from the driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: linux-mtd@lists.infradead.org

1 files changed, 60 insertions, 36 deletions

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 72e31d8..022dcdc 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -37,15 +37,9 @@
 
 #include <asm/mach/flash.h>
 #include <linux/platform_data/mtd-mxc_nand.h>
-#include <mach/hardware.h>
 
 #define DRIVER_NAME "mxc_nand"
 
-#define nfc_is_v21()		(cpu_is_mx25() || cpu_is_mx35())
-#define nfc_is_v1()		(cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
-#define nfc_is_v3_2a()		cpu_is_mx51()
-#define nfc_is_v3_2b()		cpu_is_mx53()
-
 /* Addresses for NFC registers */
 #define NFC_V1_V2_BUF_SIZE		(host->regs + 0x00)
 #define NFC_V1_V2_BUF_ADDR		(host->regs + 0x04)
@@ -1283,6 +1277,53 @@ static const struct mxc_nand_devtype_data imx53_nand_devtype_data = {
 	.ppb_shift = 8,
 };
 
+static inline int is_imx21_nfc(struct mxc_nand_host *host)
+{
+	return host->devtype_data == &imx21_nand_devtype_data;
+}
+
+static inline int is_imx27_nfc(struct mxc_nand_host *host)
+{
+	return host->devtype_data == &imx27_nand_devtype_data;
+}
+
+static inline int is_imx25_nfc(struct mxc_nand_host *host)
+{
+	return host->devtype_data == &imx25_nand_devtype_data;
+}
+
+static inline int is_imx51_nfc(struct mxc_nand_host *host)
+{
+	return host->devtype_data == &imx51_nand_devtype_data;
+}
+
+static inline int is_imx53_nfc(struct mxc_nand_host *host)
+{
+	return host->devtype_data == &imx53_nand_devtype_data;
+}
+
+static struct platform_device_id mxcnd_devtype[] = {
+	{
+		.name = "imx21-nand",
+		.driver_data = (kernel_ulong_t) &imx21_nand_devtype_data,
+	}, {
+		.name = "imx27-nand",
+		.driver_data = (kernel_ulong_t) &imx27_nand_devtype_data,
+	}, {
+		.name = "imx25-nand",
+		.driver_data = (kernel_ulong_t) &imx25_nand_devtype_data,
+	}, {
+		.name = "imx51-nand",
+		.driver_data = (kernel_ulong_t) &imx51_nand_devtype_data,
+	}, {
+		.name = "imx53-nand",
+		.driver_data = (kernel_ulong_t) &imx53_nand_devtype_data,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, mxcnd_devtype);
+
 #ifdef CONFIG_OF_MTD
 static const struct of_device_id mxcnd_dt_ids[] = {
 	{
@@ -1337,32 +1378,6 @@ static int __init mxcnd_probe_dt(struct mxc_nand_host *host)
 }
 #endif
 
-static int __init mxcnd_probe_pdata(struct mxc_nand_host *host)
-{
-	struct mxc_nand_platform_data *pdata = host->dev->platform_data;
-
-	if (!pdata)
-		return -ENODEV;
-
-	host->pdata = *pdata;
-
-	if (nfc_is_v1()) {
-		if (cpu_is_mx21())
-			host->devtype_data = &imx21_nand_devtype_data;
-		else
-			host->devtype_data = &imx27_nand_devtype_data;
-	} else if (nfc_is_v21()) {
-		host->devtype_data = &imx25_nand_devtype_data;
-	} else if (nfc_is_v3_2a()) {
-		host->devtype_data = &imx51_nand_devtype_data;
-	} else if (nfc_is_v3_2b()) {
-		host->devtype_data = &imx53_nand_devtype_data;
-	} else
-		BUG();
-
-	return 0;
-}
-
 static int __devinit mxcnd_probe(struct platform_device *pdev)
 {
 	struct nand_chip *this;
@@ -1404,8 +1419,16 @@ static int __devinit mxcnd_probe(struct platform_device *pdev)
 		return PTR_ERR(host->clk);
 
 	err = mxcnd_probe_dt(host);
-	if (err > 0)
-		err = mxcnd_probe_pdata(host);
+	if (err > 0) {
+		struct mxc_nand_platform_data *pdata = pdev->dev.platform_data;
+		if (pdata) {
+			host->pdata = *pdata;
+			host->devtype_data = (struct mxc_nand_devtype_data *)
+						pdev->id_entry->driver_data;
+		} else {
+			err = -ENODEV;
+		}
+	}
 	if (err < 0)
 		return err;
 
@@ -1494,7 +1517,7 @@ static int __devinit mxcnd_probe(struct platform_device *pdev)
 	}
 
 	/* first scan to find the device and get the page size */
-	if (nand_scan_ident(mtd, nfc_is_v21() ? 4 : 1, NULL)) {
+	if (nand_scan_ident(mtd, is_imx25_nfc(host) ? 4 : 1, NULL)) {
 		err = -ENXIO;
 		goto escan;
 	}
@@ -1508,7 +1531,7 @@ static int __devinit mxcnd_probe(struct platform_device *pdev)
 		this->ecc.layout = host->devtype_data->ecclayout_4k;
 
 	if (this->ecc.mode == NAND_ECC_HW) {
-		if (nfc_is_v1())
+		if (is_imx21_nfc(host) || is_imx27_nfc(host))
 			this->ecc.strength = 1;
 		else
 			this->ecc.strength = (host->eccsize == 4) ? 4 : 8;
@@ -1555,6 +1578,7 @@ static struct platform_driver mxcnd_driver = {
 		   .owner = THIS_MODULE,
 		   .of_match_table = of_match_ptr(mxcnd_dt_ids),
 	},
+	.id_table = mxcnd_devtype,
 	.probe = mxcnd_probe,
 	.remove = __devexit_p(mxcnd_remove),
 };