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Subject[PATCH v1 0/5] Add sdmmc UHS support to ROC-RK3328-CC board.
From: Levin Du <>

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,gpio-syscon` to
the gpio-syscon driver for general Rockchip SoC usage..

A new gpio controller named `gpio_syscon10` is defined in
rk3328.dtsi so that all rk3328 boards has access to it.

The ROC-RK3328-CC board use the new gpio <&gpio_syscon10 1> 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 Heiko's great advice!

Changes in v1:
- Refactured for general gpio-syscon usage for Rockchip SoCs.
- Add doc rockchip,gpio-syscon.txt .
- Split into small patches.
- Add gpio-syscon10 to rk3328 for general use.
- Sort dts properties in sdmmc node.

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

Levin Du (4):
gpio: syscon: Add gpio-syscon for rockchip
arm64: dts: rockchip: Add gpio-syscon10 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,gpio-syscon.txt | 41 ++++++++++++++++++++++
arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 30 ++++++++++++++++
arch/arm64/boot/dts/rockchip/rk3328.dtsi | 6 ++++
drivers/gpio/gpio-syscon.c | 32 +++++++++++++++++
4 files changed, 109 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/rockchip,gpio-syscon.txt


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