From mboxrd@z Thu Jan 1 00:00:00 1970 From: djw@t-chip.com.cn Subject: [PATCH v0 2/2] arm64: dts: rockchip: Add sdmmc UHS support for roc-rk3328-cc Date: Tue, 8 May 2018 10:48:24 +0800 Message-ID: <1525747704-8537-3-git-send-email-djw@t-chip.com.cn> References: <1525747704-8537-1-git-send-email-djw@t-chip.com.cn> Return-path: In-Reply-To: <1525747704-8537-1-git-send-email-djw@t-chip.com.cn> Sender: linux-kernel-owner@vger.kernel.org To: linux-rockchip@lists.infradead.org Cc: Wayne Chou , Levin Du , devicetree@vger.kernel.org, David Wu , Heiko Stuebner , Liang Chen , William Wu , linux-kernel@vger.kernel.org, Rob Herring , Rocky Hao , Will Deacon , Joseph Chen , Mark Rutland , Catalin Marinas , linux-arm-kernel@lists.infradead.org, "David S. Miller" List-Id: devicetree@vger.kernel.org From: Levin Du In roc-rk3328-cc board, the signal voltage of sdmmc is supplied by the vcc_sdio regulator, which is a mux between 1.8V and 3.3V, controlled by a special output only gpio pin. However, this pin, not being a normal gpio in the rockchip pinctrl, is set by bit 1 of system register GRF_SOC_CON10. Therefore a new gpio controller using gpio-syscon driver is defined in order to use regulator-gpio. If the signal voltage changes, the io domain needs to change correspondingly. To use this feature, the following options are required in kernel config: - CONFIG_GPIO_SYSCON=y - CONFIG_POWER_AVS=y - CONFIG_ROCKCHIP_IODOMAIN=y Signed-off-by: Levin Du --- arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 36 ++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts index 246c317..792cb04 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts +++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts @@ -14,6 +14,12 @@ stdout-path = "serial2:1500000n8"; }; + gpio_syscon10: gpio-syscon10 { + compatible = "rockchip,rk3328-gpio-syscon10"; + gpio-controller; + #gpio-cells = <2>; + }; + gmac_clkin: external-gmac-clock { compatible = "fixed-clock"; clock-frequency = <125000000>; @@ -41,6 +47,19 @@ vin-supply = <&vcc_io>; }; + vcc_sdio: sdmmcio-regulator { + compatible = "regulator-gpio"; + gpios = <&gpio_syscon10 1 GPIO_ACTIVE_HIGH>; + states = <1800000 0x1 + 3300000 0x0>; + regulator-name = "vcc_sdio"; + regulator-type = "voltage"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3300000>; + regulator-always-on; + vin-supply = <&vcc_sys>; + }; + vcc_host1_5v: vcc_otg_5v: vcc-host1-5v-regulator { compatible = "regulator-fixed"; enable-active-high; @@ -208,6 +227,18 @@ }; }; +&io_domains { + status = "okay"; + + vccio1-supply = <&vcc_io>; + vccio2-supply = <&vcc18_emmc>; + vccio3-supply = <&vcc_sdio>; + vccio4-supply = <&vcc_18>; + vccio5-supply = <&vcc_io>; + vccio6-supply = <&vcc_io>; + pmuio-supply = <&vcc_io>; +}; + &pinctrl { pmic { pmic_int_l: pmic-int-l { @@ -227,10 +258,15 @@ cap-mmc-highspeed; cap-sd-highspeed; disable-wp; + sd-uhs-sdr12; + sd-uhs-sdr25; + sd-uhs-sdr50; + sd-uhs-sdr104; max-frequency = <150000000>; pinctrl-names = "default"; pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>; vmmc-supply = <&vcc_sd>; + vqmmc-supply = <&vcc_sdio>; status = "okay"; }; -- 2.7.4