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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 v3 5/5] arm64: dts: rockchip: Add sdmmc UHS support for roc-rk3328-cc
Date: Thu, 31 May 2018 13:03:21 +0800	[thread overview]
Message-ID: <1527743001-29656-1-git-send-email-djw@t-chip.com.cn> (raw)
In-Reply-To: <1527737273-8387-1-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 0>, 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 v3:
- 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 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 | 24 +++++++++++++++++++++++-
 1 file changed, 23 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..25c1111 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 0 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";
 };
 
@@ -277,3 +295,7 @@
 &usb_host0_ohci {
 	status = "okay";
 };
+
+&gpio_mute {
+	status = "okay";
+};
-- 
2.7.4

      parent reply	other threads:[~2018-05-31  5:04 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-31  3:27 [PATCH v3 0/5] Add sdmmc UHS support to ROC-RK3328-CC board djw
2018-05-31  3:27 ` [PATCH v3 1/5] gpio: syscon: allow fetching syscon from parent node djw
2018-06-08  7:54   ` Linus Walleij
2018-05-31  3:27 ` [PATCH v3 2/5] gpio: syscon: rockchip: add GPIO_MUTE support for rk3328 djw
2018-05-31 14:45   ` Rob Herring
2018-06-01  2:05     ` Levin
2018-06-01 17:03       ` Rob Herring
2018-06-02  8:40         ` Levin Du
2018-06-05 19:58           ` Rob Herring
2018-06-07  1:32             ` Levin
2018-06-28  7:22               ` djw
2018-07-06 21:10                 ` Rob Herring
2018-05-31  3:27 ` [PATCH v3 3/5] arm64: dts: rockchip: Add GPIO_MUTE pin support to rk3328 djw
2018-05-31  3:27 ` [PATCH v3 4/5] arm64: dts: rockchip: Add io-domain to roc-rk3328-cc djw
2018-05-31  5:03 ` djw [this message]

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