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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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