mtd: atmel_nand: add a new dt binding item for nand dma support
This patch will set the nand dma support in dts. Since we will not use cpu_is_xxx() in nand driver. We needn't include the mach/cpu.h any more. Signed-off-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -15,6 +15,7 @@ Required properties:
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optional gpio and may be set to 0 if not present.
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Optional properties:
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- atmel,nand-has-dma : boolean to support dma transfer for nand read/write.
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- nand-ecc-mode : String, operation mode of the NAND ecc mode, soft by default.
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Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
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"soft_bch".
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@ -43,8 +43,6 @@
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#include <linux/platform_data/atmel.h>
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#include <linux/pinctrl/consumer.h>
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#include <mach/cpu.h>
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static int use_dma = 1;
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module_param(use_dma, int, 0);
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@ -128,11 +126,6 @@ struct atmel_nand_host {
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static struct nand_ecclayout atmel_pmecc_oobinfo;
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static int cpu_has_dma(void)
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{
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return cpu_is_at91sam9rl() || cpu_is_at91sam9g45();
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}
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/*
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* Enable NAND.
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*/
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@ -1336,6 +1329,8 @@ static int atmel_of_init_port(struct atmel_nand_host *host,
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board->on_flash_bbt = of_get_nand_on_flash_bbt(np);
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board->has_dma = of_property_read_bool(np, "atmel,nand-has-dma");
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if (of_get_nand_bus_width(np) == 16)
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board->bus_width_16 = 1;
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@ -1600,7 +1595,7 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
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nand_chip->bbt_options |= NAND_BBT_USE_FLASH;
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}
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if (!cpu_has_dma())
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if (!host->board.has_dma)
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use_dma = 0;
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if (use_dma) {
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@ -71,6 +71,7 @@ struct atmel_nand_data {
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u8 on_flash_bbt; /* bbt on flash */
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struct mtd_partition *parts;
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unsigned int num_parts;
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bool has_dma; /* support dma transfer */
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/* default is false, only for at32ap7000 chip is true */
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bool need_reset_workaround;
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