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mtd: spi-nor-core: Do not set data direction when there is no data

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Even when spi_nor_write_reg() has no data to write, like when executing
a write enable operation, it sets the data direction to
SPI_MEM_DATA_OUT. This trips up spi_mem_check_buswidth() because it
expects a data phase when there is none. Make sure the data direction is
set to SPI_MEM_NO_DATA when there is no data to write.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Pratyush Yadav 2021-06-26 00:47:15 +05:30 committed by Jagan Teki
parent 71025f013c
commit 6182d15b3e
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/spi/spi-nor-core.c
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@ -209,6 +209,9 @@ static int spi_nor_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
SPI_MEM_OP_NO_DUMMY,
SPI_MEM_OP_DATA_OUT(len, NULL, 1));
if (len == 0)
op.data.dir = SPI_MEM_NO_DATA;
return spi_nor_read_write_reg(nor, &op, buf);
}