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authorOlof Johansson <olof@lixom.net>2019-04-07 15:18:41 -0700
committerOlof Johansson <olof@lixom.net>2019-04-07 15:18:41 -0700
commitfbe8758f931ff5468aaeb4b304fc3edb70c908d6 (patch)
tree77ef0b2ae03e0ba048d2eb19cc5a6fe0d68a3e26
parentc983f102c6dfe2cc9e4e937a33927fa914944bbf (diff)
downloadlinux-fbe8758f931ff5468aaeb4b304fc3edb70c908d6.tar.gz
Revert "ARM: dts: nomadik: Fix polarity of SPI CS"
This reverts commit fa9463564e77067df81b0b8dec91adbbbc47bfb4.

Per Linus Walleij:

Dear ARM SoC maintainers,

can you please revert this patch. It was the wrong solution to the
wrong problem, and I must have acted in stress. Andrey fixed the
real bug in a proper way in these commits:

commit e5545c94e43b8f6599ffc01df8d1aedf18ee912a
"gpio: of: Check propname before applying "cs-gpios" quirks"
commit 7ce40277bf848391705011ba37eac2e377cbd9e6
"gpio: of: Check for "spi-cs-high" in child instead of parent node"

Signed-off-by: Olof Johansson <olof@lixom.net>
-rw-r--r--arch/arm/boot/dts/ste-nomadik-nhk15.dts9
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/arm/boot/dts/ste-nomadik-nhk15.dts b/arch/arm/boot/dts/ste-nomadik-nhk15.dts
index f2f6558a00f1..04066f9cb8a3 100644
--- a/arch/arm/boot/dts/ste-nomadik-nhk15.dts
+++ b/arch/arm/boot/dts/ste-nomadik-nhk15.dts
@@ -213,13 +213,12 @@
 		gpio-sck = <&gpio0 5 GPIO_ACTIVE_HIGH>;
 		gpio-mosi = <&gpio0 4 GPIO_ACTIVE_HIGH>;
 		/*
-		 * This chipselect is active high. Just setting the flags
-		 * to GPIO_ACTIVE_HIGH is not enough for the SPI DT bindings,
-		 * it will be ignored, only the special "spi-cs-high" flag
-		 * really counts.
+		 * It's not actually active high, but the frameworks assume
+		 * the polarity of the passed-in GPIO is "normal" (active
+		 * high) then actively drives the line low to select the
+		 * chip.
 		 */
 		cs-gpios = <&gpio0 6 GPIO_ACTIVE_HIGH>;
-		spi-cs-high;
 		num-chipselects = <1>;
 
 		/*