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mtd: mxc_nand: remove cpu_is_xxx by using platform_device_id

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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
This commit is contained in:
Shawn Guo 2012-09-15 13:34:09 +08:00
parent 5bdfba29f1
commit 4d62435f06
10 changed files with 79 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-imx/clk-imx21.c
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@ -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");

2
arch/arm/mach-imx/clk-imx25.c
View File

@ -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");

2
arch/arm/mach-imx/clk-imx27.c
View File

@ -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");

2
arch/arm/mach-imx/clk-imx31.c
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@ -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");

2
arch/arm/mach-imx/clk-imx35.c
View File

@ -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]);

2
arch/arm/mach-imx/clk-imx51-imx53.c
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@ -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");

1
arch/arm/mach-imx/devices/devices-common.h
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@ -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

20
arch/arm/mach-imx/devices/platform-mxc_nand.c
View File

@ -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));
}

2
arch/arm/mach-imx/imx27-dt.c
View File

@ -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 */ }
};

96
drivers/mtd/nand/mxc_nand.c
View File

@ -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),
};