From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Tue, 14 Feb 2023 15:26:43 +0100
Subject: [PATCH] dt-bindings: mtd: jedec,spi-nor: Document CPOL/CPHA support
References: bsc#1012628
Patch-mainline: 6.2.10
Git-commit: a56cde41340ac4049fa6edac9e6cfbcd2804074e
commit a56cde41340ac4049fa6edac9e6cfbcd2804074e upstream.
SPI EEPROMs typically support both SPI Mode 0 (CPOL=CPHA=0) and Mode 3
(CPOL=CPHA=1). However, using the latter is currently flagged as an
error by "make dtbs_check", e.g.:
arch/arm/boot/dts/r8a7791-koelsch.dtb: flash@0: Unevaluated properties are not allowed ('spi-cpha', 'spi-cpol' were unexpected)
From schema: Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
Fix this by documenting support for CPOL=CPHA=1.
Fixes: 233363aba72ac638 ("spi/panel: dt-bindings: drop CPHA and CPOL from common properties")
Cc: stable@vger.kernel.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/afe470603028db9374930b0c57464b1f6d52bdd3.1676384304.git.geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
index 3fe981b1..54736362 100644
--- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
+++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
@@ -76,6 +76,13 @@ properties:
If "broken-flash-reset" is present then having this property does not
make any difference.
+ spi-cpol: true
+ spi-cpha: true
+
+dependencies:
+ spi-cpol: [ spi-cpha ]
+ spi-cpha: [ spi-cpol ]
+
unevaluatedProperties: false
examples:
--
2.35.3