From: Hsin-Yi Wang <hsinyi@chromium.org>
To: Tudor Ambarus <tudor.ambarus@linaro.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Bjorn Andersson <andersson@kernel.org>
Cc: Pratyush Yadav <pratyush@kernel.org>,
Michael Walle <michael@walle.cc>,
"Miquel Raynal )" <miquel.raynal@bootlin.com>,
"Richard Weinberger )" <richard@nod.at>,
"Vignesh Raghavendra )" <vigneshr@ti.com>,
Rob Herring <robh+dt@kernel.org>,
linux-mtd@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
cros-qcom-dts-watchers@chromium.org,
Andy Gross <agross@kernel.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>
Subject: [PATCH 0/4] Add a property to override the quad mode
Date: Tue, 15 Aug 2023 23:31:51 +0800 [thread overview]
Message-ID: <20230815154412.713846-1-hsinyi@chromium.org> (raw)
On gigadevice gd25lq64c, the quad mode is enabled after BFPT is parsed.
According to datasheet[1], Quad enable (QE) bit needs to be set to 0 to
use write protection (WP) pin. It also recommends setting default value of
QE to 0 to avoid a potential short issue.
Add a disable-quad-mode property in devicetree that platform can use it to
override the quad mode status parsed from BFPT to use write protection.
[1]
https://www.elm-tech.com/ja/products/spi-flash-memory/gd25lq64/gd25lq64.pdf
page 13
Hsin-Yi Wang (4):
dt-bindings: mtd: jedec,spi-nor: Add disable-quad-mode property
mtd: spi-nor: sfdp: read disable-quad-mode property
arm64: dts: mediatek: mt8183: disable quad mode for spi nor
arm64: dts: qcom: sc7180: disable quad mode for spi nor
Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml | 7 +++++++
arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 1 +
arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 1 +
drivers/mtd/spi-nor/core.c | 5 +++++
drivers/mtd/spi-nor/core.h | 1 +
drivers/mtd/spi-nor/debugfs.c | 1 +
6 files changed, 16 insertions(+)
--
2.41.0.694.ge786442a9b-goog
next reply other threads:[~2023-08-15 15:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-15 15:31 Hsin-Yi Wang [this message]
2023-08-15 15:31 ` [PATCH 1/4] dt-bindings: mtd: jedec,spi-nor: Add disable-quad-mode property Hsin-Yi Wang
2023-08-15 15:31 ` [PATCH 2/4] mtd: spi-nor: sfdp: read " Hsin-Yi Wang
2023-08-15 15:31 ` [PATCH 3/4] arm64: dts: mediatek: mt8183: disable quad mode for spi nor Hsin-Yi Wang
2023-08-16 11:17 ` Eugen Hristev
2023-08-15 15:31 ` [PATCH 4/4] arm64: dts: qcom: sc7180: " Hsin-Yi Wang
2023-08-15 19:32 ` Doug Anderson
2023-08-15 15:59 ` [PATCH 0/4] Add a property to override the quad mode Michael Walle
2023-08-15 17:21 ` Hsin-Yi Wang
2023-08-15 19:19 ` Krzysztof Kozlowski
2023-08-16 10:48 ` Hsin-Yi Wang
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