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Message-ID: <20180830150639.21048-3-avienamo@nvidia.com>
Date: Thu, 30 Aug 2018 18:06:03 +0300
From: Aapo Vienamo <avienamo@...dia.com>
To: Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Ulf Hansson <ulf.hansson@...aro.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Mikko Perttunen <mperttunen@...dia.com>,
Stefan Agner <stefan@...er.ch>
CC: <devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
Aapo Vienamo <avienamo@...dia.com>
Subject: [PATCH v3 02/38] dt-bindings: mmc: tegra: Add pad voltage control properties
Document the pinctrl bindings used by the SDHCI driver to reconfigure
pad voltages on controllers supporting multiple voltage levels.
Signed-off-by: Aapo Vienamo <avienamo@...dia.com>
Reviewed-by: Mikko Perttunen <mperttunen@...dia.com>
Reviewed-by: Rob Herring <robh@...nel.org>
Acked-by: Thierry Reding <treding@...dia.com>
---
.../bindings/mmc/nvidia,tegra20-sdhci.txt | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
index 9bce57862ed6..90c214dbfb16 100644
--- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
@@ -38,3 +38,25 @@ sdhci@...00200 {
power-gpios = <&gpio 155 0>; /* gpio PT3 */
bus-width = <8>;
};
+
+Optional properties for Tegra210 and Tegra186:
+- pinctrl-names, pinctrl-0, pinctrl-1 : Specify pad voltage
+ configurations. Valid pinctrl-names are "sdmmc-3v3" and "sdmmc-1v8"
+ for controllers supporting multiple voltage levels. The order of names
+ should correspond to the pin configuration states in pinctrl-0 and
+ pinctrl-1.
+
+Example:
+sdhci@...b0000 {
+ compatible = "nvidia,tegra210-sdhci", "nvidia,tegra124-sdhci";
+ reg = <0x0 0x700b0000 0x0 0x200>;
+ interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&tegra_car TEGRA210_CLK_SDMMC1>;
+ clock-names = "sdhci";
+ resets = <&tegra_car 14>;
+ reset-names = "sdhci";
+ pinctrl-names = "sdmmc-3v3", "sdmmc-1v8";
+ pinctrl-0 = <&sdmmc1_3v3>;
+ pinctrl-1 = <&sdmmc1_1v8>;
+ status = "disabled";
+};
--
2.18.0
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