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

10 files changed, 79 insertions, 52 deletions

diff --git a/arch/arm/mach-imx/clk-imx21.c b/arch/arm/mach-imx/clk-imx21.c
index 09fc31c58474..96a4788032d1 100644
--- a/arch/arm/mach-imx/clk-imx21.c
+++ b/arch/arm/mach-imx/clk-imx21.c
@@ -162,7 +162,7 @@ int __init mx21_clocks_init(unsigned long lref, unsigned long href)
         clk_register_clkdev(clk[lcdc_hclk_gate], "ahb", "imx-fb.0");
         clk_register_clkdev(clk[usb_gate], "per", "imx21-hcd.0");
         clk_register_clkdev(clk[usb_hclk_gate], "ahb", "imx21-hcd.0");
-        clk_register_clkdev(clk[nfc_gate], NULL, "mxc_nand.0");
+        clk_register_clkdev(clk[nfc_gate], NULL, "imx21-nand.0");
         clk_register_clkdev(clk[dma_hclk_gate], "ahb", "imx-dma");
         clk_register_clkdev(clk[dma_gate], "ipg", "imx-dma");
         clk_register_clkdev(clk[wdog_gate], NULL, "imx2-wdt.0");
diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
index f1d75e72e002..f0f82f204de7 100644
--- a/arch/arm/mach-imx/clk-imx25.c
+++ b/arch/arm/mach-imx/clk-imx25.c
@@ -198,7 +198,7 @@ int __init mx25_clocks_init(void)
         clk_register_clkdev(clk[ipg], "ipg", "fsl-usb2-udc");
         clk_register_clkdev(clk[usbotg_ahb], "ahb", "fsl-usb2-udc");
         clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
-        clk_register_clkdev(clk[nfc_ipg_per], NULL, "mxc_nand.0");
+        clk_register_clkdev(clk[nfc_ipg_per], NULL, "imx25-nand.0");
         /* i.mx25 has the i.mx35 type cspi */
         clk_register_clkdev(clk[cspi1_ipg], NULL, "imx35-cspi.0");
         clk_register_clkdev(clk[cspi2_ipg], NULL, "imx35-cspi.1");
diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
index c2f111f42ddb..100e38c48f9f 100644
--- a/arch/arm/mach-imx/clk-imx27.c
+++ b/arch/arm/mach-imx/clk-imx27.c
@@ -239,7 +239,7 @@ int __init mx27_clocks_init(unsigned long fref)
         clk_register_clkdev(clk[usb_ahb_gate], "ahb", "mxc-ehci.2");
         clk_register_clkdev(clk[ssi1_ipg_gate], NULL, "imx-ssi.0");
         clk_register_clkdev(clk[ssi2_ipg_gate], NULL, "imx-ssi.1");
-        clk_register_clkdev(clk[nfc_baud_gate], NULL, "mxc_nand.0");
+        clk_register_clkdev(clk[nfc_baud_gate], NULL, "imx27-nand.0");
         clk_register_clkdev(clk[vpu_baud_gate], "per", "coda-imx27.0");
         clk_register_clkdev(clk[vpu_ahb_gate], "ahb", "coda-imx27.0");
         clk_register_clkdev(clk[dma_ahb_gate], "ahb", "imx-dma");
diff --git a/arch/arm/mach-imx/clk-imx31.c b/arch/arm/mach-imx/clk-imx31.c
index 76e6462cf9ae..729d1a9dbf6a 100644
--- a/arch/arm/mach-imx/clk-imx31.c
+++ b/arch/arm/mach-imx/clk-imx31.c
@@ -127,7 +127,7 @@ int __init mx31_clocks_init(unsigned long fref)
         clk_register_clkdev(clk[rtc_gate], NULL, "mxc_rtc");
         clk_register_clkdev(clk[epit1_gate], "epit", NULL);
         clk_register_clkdev(clk[epit2_gate], "epit", NULL);
-        clk_register_clkdev(clk[nfc], NULL, "mxc_nand.0");
+        clk_register_clkdev(clk[nfc], NULL, "imx27-nand.0");
         clk_register_clkdev(clk[ipu_gate], NULL, "ipu-core");
         clk_register_clkdev(clk[ipu_gate], NULL, "mx3_sdc_fb");
         clk_register_clkdev(clk[kpp_gate], NULL, "imx-keypad");
diff --git a/arch/arm/mach-imx/clk-imx35.c b/arch/arm/mach-imx/clk-imx35.c
index ee2581254fbc..fec48e656efa 100644
--- a/arch/arm/mach-imx/clk-imx35.c
+++ b/arch/arm/mach-imx/clk-imx35.c
@@ -256,7 +256,7 @@ int __init mx35_clocks_init()
         clk_register_clkdev(clk[ipg], "ipg", "fsl-usb2-udc");
         clk_register_clkdev(clk[usbotg_gate], "ahb", "fsl-usb2-udc");
         clk_register_clkdev(clk[wdog_gate], NULL, "imx2-wdt.0");
-        clk_register_clkdev(clk[nfc_div], NULL, "mxc_nand.0");
+        clk_register_clkdev(clk[nfc_div], NULL, "imx25-nand.0");
         clk_register_clkdev(clk[csi_gate], NULL, "mx3-camera.0");
 
         clk_prepare_enable(clk[spba_gate]);
diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c
index 2449d8ff4a18..4836b4d39a07 100644
--- a/arch/arm/mach-imx/clk-imx51-imx53.c
+++ b/arch/arm/mach-imx/clk-imx51-imx53.c
@@ -272,7 +272,7 @@ static void __init mx5_clocks_common_init(unsigned long rate_ckil,
         clk_register_clkdev(clk[usboh3_per_gate], "per", "fsl-usb2-udc");
         clk_register_clkdev(clk[usboh3_gate], "ipg", "fsl-usb2-udc");
         clk_register_clkdev(clk[usboh3_gate], "ahb", "fsl-usb2-udc");
-        clk_register_clkdev(clk[nfc_gate], NULL, "mxc_nand");
+        clk_register_clkdev(clk[nfc_gate], NULL, "imx51-nand");
         clk_register_clkdev(clk[ssi1_ipg_gate], NULL, "imx-ssi.0");
         clk_register_clkdev(clk[ssi2_ipg_gate], NULL, "imx-ssi.1");
         clk_register_clkdev(clk[ssi3_ipg_gate], NULL, "imx-ssi.2");
diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
index 86bf34cd4865..30a842ffc553 100644
--- a/arch/arm/mach-imx/devices/devices-common.h
+++ b/arch/arm/mach-imx/devices/devices-common.h
@@ -257,6 +257,7 @@ struct platform_device *__init imx_add_mxc_mmc(
 
 #include <linux/platform_data/mtd-mxc_nand.h>
 struct imx_mxc_nand_data {
+        const char *devid;
         /*
          * id is traditionally 0, but -1 is more appropriate.  We use -1 for new
          * machines but don't change existing devices as the nand device usually
diff --git a/arch/arm/mach-imx/devices/platform-mxc_nand.c b/arch/arm/mach-imx/devices/platform-mxc_nand.c
index 54b1d02cc27b..24aaad1a58c9 100644
--- a/arch/arm/mach-imx/devices/platform-mxc_nand.c
+++ b/arch/arm/mach-imx/devices/platform-mxc_nand.c
@@ -10,15 +10,17 @@
 #include <mach/hardware.h>
 #include "devices-common.h"
 
-#define imx_mxc_nand_data_entry_single(soc, _size)                      \
+#define imx_mxc_nand_data_entry_single(soc, _devid, _size)              \
         {                                                               \
+                .devid = _devid,                                        \
                 .iobase = soc ## _NFC_BASE_ADDR,                        \
                 .iosize = _size,                                        \
                 .irq = soc ## _INT_NFC                                  \
         }
 
-#define imx_mxc_nandv3_data_entry_single(soc, _size)                    \
+#define imx_mxc_nandv3_data_entry_single(soc, _devid, _size)            \
         {                                                               \
+                .devid = _devid,                                        \
                 .id = -1,                                               \
                 .iobase = soc ## _NFC_BASE_ADDR,                        \
                 .iosize = _size,                                        \
@@ -28,32 +30,32 @@
 
 #ifdef CONFIG_SOC_IMX21
 const struct imx_mxc_nand_data imx21_mxc_nand_data __initconst =
-        imx_mxc_nand_data_entry_single(MX21, SZ_4K);
+        imx_mxc_nand_data_entry_single(MX21, "imx21-nand", SZ_4K);
 #endif /* ifdef CONFIG_SOC_IMX21 */
 
 #ifdef CONFIG_SOC_IMX25
 const struct imx_mxc_nand_data imx25_mxc_nand_data __initconst =
-        imx_mxc_nand_data_entry_single(MX25, SZ_8K);
+        imx_mxc_nand_data_entry_single(MX25, "imx25-nand", SZ_8K);
 #endif /* ifdef CONFIG_SOC_IMX25 */
 
 #ifdef CONFIG_SOC_IMX27
 const struct imx_mxc_nand_data imx27_mxc_nand_data __initconst =
-        imx_mxc_nand_data_entry_single(MX27, SZ_4K);
+        imx_mxc_nand_data_entry_single(MX27, "imx27-nand", SZ_4K);
 #endif /* ifdef CONFIG_SOC_IMX27 */
 
 #ifdef CONFIG_SOC_IMX31
 const struct imx_mxc_nand_data imx31_mxc_nand_data __initconst =
-        imx_mxc_nand_data_entry_single(MX31, SZ_4K);
+        imx_mxc_nand_data_entry_single(MX31, "imx27-nand", SZ_4K);
 #endif
 
 #ifdef CONFIG_SOC_IMX35
 const struct imx_mxc_nand_data imx35_mxc_nand_data __initconst =
-        imx_mxc_nand_data_entry_single(MX35, SZ_8K);
+        imx_mxc_nand_data_entry_single(MX35, "imx25-nand", SZ_8K);
 #endif
 
 #ifdef CONFIG_SOC_IMX51
 const struct imx_mxc_nand_data imx51_mxc_nand_data __initconst =
-        imx_mxc_nandv3_data_entry_single(MX51, SZ_16K);
+        imx_mxc_nandv3_data_entry_single(MX51, "imx51-nand", SZ_16K);
 #endif
 
 struct platform_device *__init imx_add_mxc_nand(
@@ -76,7 +78,7 @@ struct platform_device *__init imx_add_mxc_nand(
                         .flags = IORESOURCE_MEM,
                 },
         };
-        return imx_add_platform_device("mxc_nand", data->id,
+        return imx_add_platform_device(data->devid, data->id,
                         res, ARRAY_SIZE(res) - !data->axibase,
                         pdata, sizeof(*pdata));
 }
diff --git a/arch/arm/mach-imx/imx27-dt.c b/arch/arm/mach-imx/imx27-dt.c
index 43fbf8640109..a6c288e180ce 100644
--- a/arch/arm/mach-imx/imx27-dt.c
+++ b/arch/arm/mach-imx/imx27-dt.c
@@ -29,7 +29,7 @@ static const struct of_dev_auxdata imx27_auxdata_lookup[] __initconst = {
         OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI2_BASE_ADDR, "imx27-cspi.1", NULL),
         OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI3_BASE_ADDR, "imx27-cspi.2", NULL),
         OF_DEV_AUXDATA("fsl,imx27-wdt", MX27_WDOG_BASE_ADDR, "imx2-wdt.0", NULL),
-        OF_DEV_AUXDATA("fsl,imx27-nand", MX27_NFC_BASE_ADDR, "mxc_nand.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx27-nand", MX27_NFC_BASE_ADDR, "imx27-nand.0", NULL),
         { /* sentinel */ }
 };
 
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 72e31d86030d..022dcdc256fb 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),
 };