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authorMark Jackson <mpfj-list@newflow.co.uk>2013-04-19 21:08:28 +0100
committerTony Lindgren <tony@atomide.com>2013-05-16 08:53:22 -0700
commit496c8a0bbb726c2608b3b1318d231ab04a9a2ec3 (patch)
tree2e8bea0925efe644bb64fec913329c10eb9576a1 /arch/arm/mach-omap2/gpmc.c
parent4d5843616d16eb1a5851a976ec82b8d436233ad7 (diff)
ARM: OMAP2+: Allow NAND transfer mode to be specified in DT
OMAP devices support various NAND transfer modes. Currently all device-tree definitions will use the default "prefetch polled" mode, so this patch enables the transfer mode to be specified in the device-tree. Signed-off-by: Mark Jackson <mpfj@newflow.co.uk> Acked-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/gpmc.c')
-rw-r--r--arch/arm/mach-omap2/gpmc.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 6c4da1254f53..a195468286f4 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -1345,6 +1345,13 @@ static const char * const nand_ecc_opts[] = {
[OMAP_ECC_BCH8_CODE_HW] = "bch8",
};
+static const char * const nand_xfer_types[] = {
+ [NAND_OMAP_PREFETCH_POLLED] = "prefetch-polled",
+ [NAND_OMAP_POLLED] = "polled",
+ [NAND_OMAP_PREFETCH_DMA] = "prefetch-dma",
+ [NAND_OMAP_PREFETCH_IRQ] = "prefetch-irq",
+};
+
static int gpmc_probe_nand_child(struct platform_device *pdev,
struct device_node *child)
{
@@ -1374,6 +1381,13 @@ static int gpmc_probe_nand_child(struct platform_device *pdev,
break;
}
+ if (!of_property_read_string(child, "ti,nand-xfer-type", &s))
+ for (val = 0; val < ARRAY_SIZE(nand_xfer_types); val++)
+ if (!strcasecmp(s, nand_xfer_types[val])) {
+ gpmc_nand_data->xfer_type = val;
+ break;
+ }
+
val = of_get_nand_bus_width(child);
if (val == 16)
gpmc_nand_data->devsize = NAND_BUSWIDTH_16;