From: Levin Du <djw@xxxxxxxxxxxxx> 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-grf-gpio` to the gpio-syscon driver, which currently only support for the access of the GPIO_MUTE pin in RK3328. Support for HDMI pins can be added later on perhaps by writing a standalone driver. A new GRF GPIO controller named `grf_gpio` is defined in rk3328.dtsi so that all RK3328 boards has access to it. The ROC-RK3328-CC board use the new gpio <&grf_gpio 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 v4: - Use binding of "rockchip,rk3328-grf-gpio" - Use <&grf_gpio 0> to refer to the GPIO_MUTE pin. 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: - 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 Levin Du (4): gpio: syscon: rockchip: add GRF GPIO support for rk3328 arm64: dts: rockchip: add GRF GPIO controller 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-grf-gpio.txt | 32 ++++++++++++++++++++ arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 34 ++++++++++++++++++++++ arch/arm64/boot/dts/rockchip/rk3328.dtsi | 6 ++++ drivers/gpio/gpio-syscon.c | 31 ++++++++++++++++++++ 4 files changed, 103 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.txt -- 2.7.4 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-rockchip
