ARM: OMAP2+: gpmc: update nand register helper

Provide helper function for updating NAND register details for
the necessary chip select. NAND drivers platform data can be
updated with this information so that NAND driver can handle
GPMC NAND operations by itself.

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

2 files changed, 38 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index b2b5759ab0fe..5cce9b00c13e 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -682,6 +682,26 @@ int gpmc_prefetch_reset(int cs)
 }
 EXPORT_SYMBOL(gpmc_prefetch_reset);
 
+void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
+{
+        reg->gpmc_status = gpmc_base + GPMC_STATUS;
+        reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET +
+                                GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
+        reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET +
+                                GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
+        reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET +
+                                GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
+        reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
+        reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2;
+        reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL;
+        reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS;
+        reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG;
+        reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL;
+        reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG;
+        reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT;
+        reg->gpmc_bch_result0 = gpmc_base + GPMC_ECC_BCH_RESULT_0;
+}
+
 static void __init gpmc_mem_init(void)
 {
         int cs;
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index f37764a36072..06198a51c4f0 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -133,6 +133,24 @@ struct gpmc_timings {
         u16 wr_data_mux_bus;    /* WRDATAONADMUXBUS */
 };
 
+struct gpmc_nand_regs {
+        void __iomem    *gpmc_status;
+        void __iomem    *gpmc_nand_command;
+        void __iomem    *gpmc_nand_address;
+        void __iomem    *gpmc_nand_data;
+        void __iomem    *gpmc_prefetch_config1;
+        void __iomem    *gpmc_prefetch_config2;
+        void __iomem    *gpmc_prefetch_control;
+        void __iomem    *gpmc_prefetch_status;
+        void __iomem    *gpmc_ecc_config;
+        void __iomem    *gpmc_ecc_control;
+        void __iomem    *gpmc_ecc_size_config;
+        void __iomem    *gpmc_ecc1_result;
+        void __iomem    *gpmc_bch_result0;
+};
+
+extern void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
+
 extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
 extern unsigned int gpmc_ps_to_ticks(unsigned int time_ps);
 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);