[PATCH] GPMC: Limited addressing support

[PATCH] GPMC: Limited addressing support

[Raphaël Assénat]

This patch provides a way to enable the GPMC limited addressing
mode which is needed to access nonmultiplexed devices.

Signed-off-by: Raphael Assenat <raph@8d.com>

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 130034b..521944a 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -540,6 +540,15 @@ int gpmc_cs_configure(int cs, int cmd, int wval)
 		gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
 		break;
 
+	case GPMC_EN_LIMITEDADDRESS:
+		regval = gpmc_read_reg(GPMC_CONFIG);
+		if (wval)
+			regval |= GPMC_CONFIG_LIMITEDADDRESS;
+		else
+			regval &= ~GPMC_CONFIG_LIMITEDADDRESS;
+		gpmc_write_reg(GPMC_CONFIG, regval);
+		break;
+
 	default:
 		printk(KERN_ERR "gpmc_configure_cs: Not supported\n");
 		err = -EINVAL;
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index 1527929..7fdbbb8 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -42,6 +42,7 @@
 #define GPMC_NAND_DATA		0x0000000c
 
 #define GPMC_ENABLE_IRQ		0x0000000d
+#define GPMC_EN_LIMITEDADDRESS	0x0000000e
 
 /* ECC commands */
 #define GPMC_ECC_READ		0 /* Reset Hardware ECC for read */
@@ -75,6 +76,7 @@
 
 #define GPMC_DEVICETYPE_NOR		0
 #define GPMC_DEVICETYPE_NAND		2
+#define GPMC_CONFIG_LIMITEDADDRESS	0x00000002
 #define GPMC_CONFIG_WRITEPROTECT	0x00000010
 #define GPMC_STATUS_BUFF_EMPTY		0x00000001
 #define WR_RD_PIN_MONITORING		0x00600000