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29 lines
892 B
Diff
29 lines
892 B
Diff
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From 1e99d0d51ec97bf48edd277658004ce030543d98 Mon Sep 17 00:00:00 2001
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From: Cyrille Pitchen <cyrille.pitchen@atmel.com>
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Date: Tue, 6 Dec 2016 17:01:41 +0100
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Subject: [PATCH] mtd: spi-nor: improve macronix_quad_enable()
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The patch checks whether the Quad Enable bit is already set in the Status
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Register. If so, the function exits immediately with a successful return
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code.
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Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
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Reviewed-by: Jagan Teki <jagan@openedev.com>
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Acked-by: Marek Vasut <marek.vasut@gmail.com>
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---
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drivers/mtd/spi-nor/spi-nor.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/drivers/mtd/spi-nor/spi-nor.c
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+++ b/drivers/mtd/spi-nor/spi-nor.c
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@@ -1305,6 +1305,9 @@ static int macronix_quad_enable(struct s
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val = read_sr(nor);
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if (val < 0)
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return val;
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+ if (val & SR_QUAD_EN_MX)
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+ return 0;
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+
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write_enable(nor);
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write_sr(nor, val | SR_QUAD_EN_MX);
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