diff options
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/gpmc-nand.txt | 8 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/gpmc.c | 14 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt index 6a983c1d87cd..df338cb5059c 100644 --- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt @@ -29,6 +29,13 @@ Optional properties: "bch4" 4-bit BCH ecc code "bch8" 8-bit BCH ecc code + - ti,nand-xfer-type: A string setting the data transfer type. One of: + + "prefetch-polled" Prefetch polled mode (default) + "polled" Polled mode, without prefetch + "prefetch-dma" Prefetch enabled sDMA mode + "prefetch-irq" Prefetch enabled irq mode + - elm_id: Specifies elm device node. This is required to support BCH error correction using ELM module. @@ -55,6 +62,7 @@ Example for an AM33xx board: reg = <0 0 0>; /* CS0, offset 0 */ nand-bus-width = <16>; ti,nand-ecc-opt = "bch8"; + ti,nand-xfer-type = "polled"; gpmc,sync-clk-ps = <0>; gpmc,cs-on-ns = <0>; 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; |