OpenWrt
/branches/18.06.1/target/linux/generic/backport-4.9/062-v4.11-0002-mtd-spi-nor-improve-macronix_quad_enable.patch |
@@ -0,0 +1,28 @@ |
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 |
@@ -1311,6 +1311,9 @@ 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); |