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- From 1e99d0d51ec97bf48edd277658004ce030543d98 Mon Sep 17 00:00:00 2001
- From: Cyrille Pitchen <cyrille.pitchen@atmel.com>
- Date: Tue, 6 Dec 2016 17:01:41 +0100
- Subject: [PATCH] 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>
- ---
- drivers/mtd/spi-nor/spi-nor.c | 3 +++
- 1 file changed, 3 insertions(+)
- --- 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 s
- 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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