mbox series

[0/4] Add a property to override the quad mode

Message ID 20230815154412.713846-1-hsinyi@chromium.org
Headers show
Series Add a property to override the quad mode | expand

Message

Hsin-Yi Wang Aug. 15, 2023, 3:31 p.m. UTC 
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(+)