[PATCH v2 06/10] mtd: nand: omap2: obtain memory from resource

Afzal Mohammed
2012-06-13T11:49:12Z

gpmc initialization done by platform code now updates struct resource
with the address space alloted for nand. Use this interface to obtain
memory rather than relying on platform data field - phys_base.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
---
arch/arm/plat-omap/include/plat/nand.h | 1 -
drivers/mtd/nand/omap2.c | 19 +++++++++++++++----
2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/arch/arm/plat-omap/include/plat/nand.h b/arch/arm/plat-omap/include/plat/nand.h
index 86e4d9c..290cef5 100644
--- a/arch/arm/plat-omap/include/plat/nand.h
+++ b/arch/arm/plat-omap/include/plat/nand.h
@@ -26,7 +26,6 @@ struct omap_nand_platform_data {
bool dev_ready;
int gpmc_irq;
enum nand_io xfer_type;
- unsigned long phys_base;
int devsize;
enum omap_ecc ecc_opt;
struct gpmc_nand_regs reg;
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1d138fe..318ed8a 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -132,6 +132,7 @@ struct omap_nand_info {

int gpmc_cs;
unsigned long phys_base;
+ unsigned long mem_size;
struct completion comp;
int dma_ch;
int gpmc_irq;
@@ -1279,6 +1280,7 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
struct omap_nand_platform_data *pdata;
int err;
int i, offset;
+ struct resource *res;

pdata = pdev->dev.platform_data;
if (pdata == NULL) {
@@ -1298,7 +1300,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
info->pdev = pdev;

info->gpmc_cs = pdata->cs;
- info->phys_base = pdata->phys_base;
info->reg = pdata->reg;

info->mtd.priv = &info->nand;
@@ -1311,13 +1312,23 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
/* NAND write protect off */
gpmc_cs_configure(info->gpmc_cs, GPMC_CONFIG_WP, 0);

- if (!request_mem_region(info->phys_base, NAND_IO_SIZE,
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ err = -EINVAL;
+ dev_err(&pdev->dev, "error getting memory resource\n");
+ goto out_free_info;
+ }
+
+ info->phys_base = res->start;
+ info->mem_size = resource_size(res);
+
+ if (!request_mem_region(info->phys_base, info->mem_size,
pdev->dev.driver->name)) {
err = -EBUSY;
goto out_free_info;
}

- info->nand.IO_ADDR_R = ioremap(info->phys_base, NAND_IO_SIZE);
+ info->nand.IO_ADDR_R = ioremap(info->phys_base, info->mem_size);
if (!info->nand.IO_ADDR_R) {
err = -ENOMEM;
goto out_release_mem_region;
@@ -1474,7 +1485,7 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
return 0;

out_release_mem_region:
- release_mem_region(info->phys_base, NAND_IO_SIZE);
+ release_mem_region(info->phys_base, info->mem_size);
out_free_info:
kfree(info);

--
1.7.10.2