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From: djw@t-chip.com.cn To: linux-rockchip@lists.infradead.org Cc: Wayne Chou <zxf@t-chip.com.cn>, Levin Du <djw@t-chip.com.cn>, Heiko Stuebner <heiko@sntech.de>, devicetree@vger.kernel.org, David Wu <david.wu@rock-chips.com>, Liang Chen <cl@rock-chips.com>, William Wu <william.wu@rock-chips.com>, linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>, Joseph Chen <chenjh@rock-chips.com>, Will Deacon <will.deacon@arm.com>, Rocky Hao <rocky.hao@rock-chips.com>, Mark Rutland <mark.rutland@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 5/5] arm64: dts: rockchip: Add sdmmc UHS support for roc-rk3328-cc Date: Fri, 18 May 2018 11:52:08 +0800 [thread overview] Message-ID: <1526615528-9707-5-git-send-email-djw@t-chip.com.cn> (raw) In-Reply-To: <1526615528-9707-1-git-send-email-djw@t-chip.com.cn> From: Levin Du <djw@t-chip.com.cn> 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 labeled "gpiomut_pmuio_iout", corresponding bit 1 of the syscon GRF_SOC_CON10. This special pin can now be reference as <&gpio_mute 1>, thanks to the gpio-syscon driver, which makes writing regulator-gpio possible. 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 <djw@t-chip.com.cn> --- Changes in v2: - Rename gpio_syscon10 to gpio_mute in rk3328-roc-cc.dts Changes in v1: - Split into small patches - Sort dts properties in sdmmc node arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts index b983abd..e3162bb 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts +++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts @@ -41,6 +41,19 @@ vin-supply = <&vcc_io>; }; + vcc_sdio: sdmmcio-regulator { + compatible = "regulator-gpio"; + gpios = <&gpio_mute 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; @@ -213,7 +226,7 @@ vccio1-supply = <&vcc_io>; vccio2-supply = <&vcc18_emmc>; - vccio3-supply = <&vcc_io>; + vccio3-supply = <&vcc_sdio>; vccio4-supply = <&vcc_18>; vccio5-supply = <&vcc_io>; vccio6-supply = <&vcc_io>; @@ -242,7 +255,12 @@ max-frequency = <150000000>; pinctrl-names = "default"; pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>; + sd-uhs-sdr12; + sd-uhs-sdr25; + sd-uhs-sdr50; + sd-uhs-sdr104; vmmc-supply = <&vcc_sd>; + vqmmc-supply = <&vcc_sdio>; status = "okay"; }; -- 2.7.4
next prev parent reply other threads:[~2018-05-18 3:53 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-18 3:32 [PATCH v2 0/5] Add sdmmc UHS support to ROC-RK3328-CC board djw 2018-05-18 3:52 ` [PATCH v2 1/5] gpio: syscon: allow fetching syscon from parent node djw 2018-05-18 3:52 ` [PATCH v2 2/5] gpio: syscon: Add gpio-syscon for rockchip djw 2018-05-22 18:02 ` Rob Herring 2018-05-23 2:02 ` Levin Du 2018-05-23 14:43 ` Rob Herring 2018-05-23 15:12 ` Heiko Stübner 2018-05-23 19:53 ` Rob Herring 2018-05-24 1:59 ` Levin Du 2018-05-24 12:18 ` Heiko Stuebner 2018-05-28 3:34 ` Levin 2018-05-24 12:07 ` Heiko Stuebner 2018-05-24 13:38 ` Rob Herring 2018-05-24 8:28 ` Linus Walleij 2018-05-24 8:35 ` Heiko Stübner 2018-05-24 8:47 ` Linus Walleij 2018-05-18 3:52 ` [PATCH v2 3/5] arm64: dts: rockchip: Add gpio-mute to rk3328 djw 2018-05-18 3:52 ` [PATCH v2 4/5] arm64: dts: rockchip: Add io-domain to roc-rk3328-cc djw 2018-05-18 3:52 ` djw [this message] 2018-05-23 8:08 ` [PATCH v2 1/5] gpio: syscon: allow fetching syscon from parent node Linus Walleij
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