ARM: OMAP2+: gpmc-onenand: provide memory as resource

Currently omap onenand driver invokes gpmc_cs_request, obtains address
space allocated by gpmc to onenand. Remove this, instead use resource
structure; this is now updated with address space for onenand by gpmc
initialization with the help of gpmc_cs_request. And remove usage of
gpmc_cs_request in onenand driver.

This helps in smooth migration of gpmc to driver.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 22 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index a0fa9bb2bda5..71d7c07dd350 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -23,11 +23,19 @@
 #include <plat/board.h>
 #include <plat/gpmc.h>
 
+#define ONENAND_IO_SIZE SZ_128K
+
 static struct omap_onenand_platform_data *gpmc_onenand_data;
 
+static struct resource gpmc_onenand_resource = {
+        .flags          = IORESOURCE_MEM,
+};
+
 static struct platform_device gpmc_onenand_device = {
         .name           = "omap2-onenand",
         .id             = -1,
+        .num_resources  = 1,
+        .resource       = &gpmc_onenand_resource,
 };
 
 static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base)
@@ -390,6 +398,8 @@ static int gpmc_onenand_setup(void __iomem *onenand_base, int *freq_ptr)
 
 void __init gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
 {
+        int err;
+
         gpmc_onenand_data = _onenand_data;
         gpmc_onenand_data->onenand_setup = gpmc_onenand_setup;
         gpmc_onenand_device.dev.platform_data = gpmc_onenand_data;
@@ -401,8 +411,19 @@ void __init gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
                 gpmc_onenand_data->flags |= ONENAND_SYNC_READ;
         }
 
+        err = gpmc_cs_request(gpmc_onenand_data->cs, ONENAND_IO_SIZE,
+                                (unsigned long *)&gpmc_onenand_resource.start);
+        if (err < 0) {
+                pr_err("%s: Cannot request GPMC CS\n", __func__);
+                return;
+        }
+
+        gpmc_onenand_resource.end = gpmc_onenand_resource.start +
+                                                        ONENAND_IO_SIZE - 1;
+
         if (platform_device_register(&gpmc_onenand_device) < 0) {
-                printk(KERN_ERR "Unable to register OneNAND device\n");
+                pr_err("%s: Unable to register OneNAND device\n", __func__);
+                gpmc_cs_free(gpmc_onenand_data->cs);
                 return;
         }
 }