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authorCyrille Pitchen <cyrille.pitchen@atmel.com>2016-12-06 17:01:41 +0100
committerCyrille Pitchen <cyrille.pitchen@atmel.com>2017-02-10 13:54:52 +0100
commit32c90f1682a01ff9e1c2fa83c18a15e35f7563ce (patch)
treeb1455a51c470b16f8fa97b8ccfaa8acf61c7a015 /drivers/mtd
parente99ca98f1d7190c16601b00d0c96212d7c00577d (diff)
downloadop-kernel-dev-32c90f1682a01ff9e1c2fa83c18a15e35f7563ce.zip
op-kernel-dev-32c90f1682a01ff9e1c2fa83c18a15e35f7563ce.tar.gz
mtd: spi-nor: improve macronix_quad_enable()
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> Acked-by: Marek Vasut <marek.vasut@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/spi-nor.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index be1d41d..4e35917 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1305,6 +1305,9 @@ 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);
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