Messages in this thread Patch in this message | | | From | Cyrille Pitchen <> | Subject | [PATCH 1/1] mtd: spi-nor: improve macronix_quad_enable() | Date | Tue, 6 Dec 2016 17:01:41 +0100 |
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The patch checks whether the Quad Enable bit is already set in the Status Register. If so, the function exits immediately with a successful return code.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Reviewed-by: Jagan Teki <jagan@openedev.com> --- drivers/mtd/spi-nor/spi-nor.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index da7cd69d4857..1fd32b991eb7 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -1216,6 +1216,9 @@ static int macronix_quad_enable(struct spi_nor *nor) val = read_sr(nor); if (val < 0) return val; + if (val & SR_QUAD_EN_MX) + return 0; + write_enable(nor); write_sr(nor, val | SR_QUAD_EN_MX); -- 2.7.4
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