linux-kernel - [PATCH v3 0/5] Add sdmmc UHS support to ROC-RK3328-CC board.

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Date:   Thu, 31 May 2018 11:27:48 +0800
From:   djw@...hip.com.cn
To:     linux-rockchip@...ts.infradead.org
Cc:     Wayne Chou <zxf@...hip.com.cn>, Levin Du <djw@...hip.com.cn>,
        Heiko Stuebner <heiko@...ech.de>,
        Arnd Bergmann <arnd@...db.de>, Liang Chen <cl@...k-chips.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Robin Murphy <robin.murphy@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        David Wu <david.wu@...k-chips.com>,
        Finley Xiao <finley.xiao@...k-chips.com>,
        William Wu <william.wu@...k-chips.com>,
        Rocky Hao <rocky.hao@...k-chips.com>,
        Will Deacon <will.deacon@....com>, devicetree@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        "David S. Miller" <davem@...emloft.net>,
        Sugar Zhang <sugar.zhang@...k-chips.com>,
        linux-kernel@...r.kernel.org, Joseph Chen <chenjh@...k-chips.com>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v3 0/5] Add sdmmc UHS support to ROC-RK3328-CC board.

From: Levin Du <djw@...hip.com.cn>


Hi all, this is an attemp to add sdmmc UHS support to the
ROC-RK3328-CC board.

This patch series adds a new compatible `rockchip,rk3328-gpio-mute` to
the gpio-syscon driver for the access of the GPIO_MUTE pin in rk3328.

A new gpio controller named `gpio_mute` is defined in
rk3328.dtsi and so that all rk3328 boards has access to it.

The ROC-RK3328-CC board use the new gpio <&gpio_mute 0> in
gpio-regulator to control the signal voltage of the sdmmc.
It is essential for UHS support which requires 1.8V signal voltage.

Many thanks to the Linux people!

Changes in v3:
- Change from general gpio-syscon to specific rk3328-gpio-mute
- Use dedicated "rockchip,rk3328-gpio-mute" driver
- Use <&gpio_mute 0> instead of <&gpio_mute 1> to refer to the GPIO_MUTE pin.

Changes in v2:
- Rename gpio_syscon10 to gpio_mute in doc
- Rename gpio_syscon10 to gpio_mute in rk3328.dtsi
- Rename gpio_syscon10 to gpio_mute in rk3328-roc-cc.dts

Changes in v1:
- New: allow fetching syscon from parent node in gpio-syscon driver
- Refactured for general gpio-syscon usage for Rockchip SoCs.
- Add doc rockchip,gpio-syscon.txt
- Split from V0 and add to rk3328.dtsi for general use.
- Split from V0.
- Split into small patches
- Sort dts properties in sdmmc node

Heiko Stuebner (1):
  gpio: syscon: allow fetching syscon from parent node

Levin Du (4):
  gpio: syscon: rockchip: add GPIO_MUTE support for rk3328
  arm64: dts: rockchip: Add GPIO_MUTE pin support to rk3328
  arm64: dts: rockchip: Add io-domain to roc-rk3328-cc
  arm64: dts: rockchip: Add sdmmc UHS support for roc-rk3328-cc

 .../bindings/gpio/rockchip,rk3328-gpio-mute.txt    | 28 ++++++++++++++++++
 arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts     | 34 ++++++++++++++++++++++
 arch/arm64/boot/dts/rockchip/rk3328.dtsi           |  7 +++++
 drivers/gpio/gpio-syscon.c                         | 33 +++++++++++++++++++++
 4 files changed, 102 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/rockchip,rk3328-gpio-mute.txt

-- 
2.7.4