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authorAllen-KH Cheng2022-10-31 20:46:33 +0800
committerTudor Ambarus2022-11-21 16:36:18 +0200
commitfdc20370d93e8c6d2f448a539d08c2c064af7694 (patch)
treed8b991033355f11f10700f2536344e71ccefe1ac /drivers/mtd
parent4dc49062a7e9c0c7261807fb855df1c611eb78c3 (diff)
mtd: spi-nor: Fix the number of bytes for the dummy cycles
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: 0e30f47232ab ("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
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/core.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 71b9bcd8991d..dd45f286bb4e 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1939,7 +1939,8 @@ static int spi_nor_spimem_check_readop(struct spi_nor *nor,
spi_nor_spimem_setup_op(nor, &op, read->proto);
/* convert the dummy cycles to the number of bytes */
- op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8;
+ op.dummy.nbytes = (read->num_mode_clocks + read->num_wait_states) *
+ op.dummy.buswidth / 8;
if (spi_nor_protocol_is_dtr(nor->read_proto))
op.dummy.nbytes *= 2;