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authorpekon gupta <pekon@ti.com>2014-05-19 13:24:39 +0530
committerBrian Norris <computersforpeace@gmail.com>2014-05-20 17:52:14 -0700
commit27c9fd607587e6c3b517590df4cd35ac85f3d0bd (patch)
tree92fbf32f4f2c3f3b986c2dd0c7a1f2a9b9383d23 /arch/arm/mach-omap2
parent4007e2d175cc83ea728b757e49155826b32fbff8 (diff)
mtd: nand: omap: add support for BCH16_ECC - GPMC driver updates
This patch add support for BCH16_ECC in GPMC (controller) driver: - extends configuration space to include BCH16 registers - extends parsing of DT binding for selecting BCH16 ecc-scheme Signed-off-by: Pekon Gupta <pekon@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'arch/arm/mach-omap2')
-rw-r--r--arch/arm/mach-omap2/gpmc.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index ab43755364f5..9b27773db040 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -68,6 +68,9 @@
#define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */
#define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */
#define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */
+#define GPMC_ECC_BCH_RESULT_4 0x300 /* not available on OMAP2 */
+#define GPMC_ECC_BCH_RESULT_5 0x304 /* not available on OMAP2 */
+#define GPMC_ECC_BCH_RESULT_6 0x308 /* not available on OMAP2 */
/* GPMC ECC control settings */
#define GPMC_ECC_CTRL_ECCCLEAR 0x100
@@ -666,6 +669,12 @@ void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
GPMC_BCH_SIZE * i;
reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 +
GPMC_BCH_SIZE * i;
+ reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 +
+ i * GPMC_BCH_SIZE;
+ reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 +
+ i * GPMC_BCH_SIZE;
+ reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 +
+ i * GPMC_BCH_SIZE;
}
}
@@ -1401,6 +1410,12 @@ static int gpmc_probe_nand_child(struct platform_device *pdev,
else
gpmc_nand_data->ecc_opt =
OMAP_ECC_BCH8_CODE_HW_DETECTION_SW;
+ else if (!strcmp(s, "bch16"))
+ if (gpmc_nand_data->elm_of_node)
+ gpmc_nand_data->ecc_opt =
+ OMAP_ECC_BCH16_CODE_HW;
+ else
+ pr_err("%s: BCH16 requires ELM support\n", __func__);
else
pr_err("%s: ti,nand-ecc-opt invalid value\n", __func__);