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mtd: spi-nor: Fix the number of bytes for the dummy cycles
[ Upstream commitfdc20370d9
] The number of bytes used by spi_nor_spimem_check_readop() may be incorrect for the dummy cycles. Since nor->read_dummy is not initialized before spi_nor_spimem_adjust_hwcaps(). We use both mode and wait state clock cycles instead of nor->read_dummy. Fixes:0e30f47232
("mtd: spi-nor: add support for DTR protocol") Co-developed-by: Bayi Cheng <bayi.cheng@mediatek.com> Signed-off-by: Bayi Cheng <bayi.cheng@mediatek.com> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com> Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Tested-by: Dhruva Gole <d-gole@ti.com> Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Pratyush Yadav <pratyush@kernel.org> Link: https://lore.kernel.org/r/20221031124633.13189-1-allen-kh.cheng@mediatek.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -2155,7 +2155,8 @@ static int spi_nor_spimem_check_readop(struct spi_nor *nor,
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spi_nor_spimem_setup_op(nor, &op, read->proto);
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/* convert the dummy cycles to the number of bytes */
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op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8;
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op.dummy.nbytes = (read->num_mode_clocks + read->num_wait_states) *
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op.dummy.buswidth / 8;
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if (spi_nor_protocol_is_dtr(nor->read_proto))
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op.dummy.nbytes *= 2;
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