mtd: add read_byte support to plat_nand (b4f7aa84) · Commits · 戴 / test

Lantiq SoCs have a External Bus Unit (EBU) that is used to attach MTD media. As we need to co-exist with PCI on the same bus, certain swapping settings must be applied. Similar to the NOR map driver we need to apply a fix to make NAND work. The easiest way is to use byte reads. Signed-off-by:

John Crispin <blogic@openwrt.org> Signed-off-by:

Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by:

David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/plat_nand.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -79,6 +79,7 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
		data->chip.select_chip = pdata->ctrl.select_chip;
		data->chip.write_buf = pdata->ctrl.write_buf;
		data->chip.read_buf = pdata->ctrl.read_buf;
		data->chip.read_byte = pdata->ctrl.read_byte;
		data->chip.chip_delay = pdata->chip.chip_delay;
		data->chip.options \|= pdata->chip.options;
		data->chip.bbt_options \|= pdata->chip.bbt_options;

include/linux/mtd/nand.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -654,6 +654,7 @@ struct platform_nand_ctrl {
		void (cmd_ctrl)(struct mtd_info mtd, int dat, unsigned int ctrl);
		void (write_buf)(struct mtd_info mtd, const uint8_t *buf, int len);
		void (read_buf)(struct mtd_info mtd, uint8_t *buf, int len);
		unsigned char (read_byte)(struct mtd_info mtd);
		void *priv;
		};

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