diff mbox series

[v2,01/10] dt-bindings: mmc: tegra: Add pad voltage control properties

Message ID 1532607560-11253-2-git-send-email-avienamo@nvidia.com (mailing list archive)
State New, archived
Headers show
Series Tegra SDHCI enable 1.8 V signaling on Tegar210 and Tegra186 | expand

Commit Message

Aapo Vienamo July 26, 2018, 12:19 p.m. UTC
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@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
---
 .../bindings/mmc/nvidia,tegra20-sdhci.txt          | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

Comments

Rob Herring (Arm) July 30, 2018, 11:22 p.m. UTC | #1
On Thu, Jul 26, 2018 at 03:19:11PM +0300, Aapo Vienamo wrote:
> 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@nvidia.com>
> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
> ---
>  .../bindings/mmc/nvidia,tegra20-sdhci.txt          | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)

Reviewed-by: Rob Herring <robh@kernel.org>
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diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
index 9bce578..90c214d 100644
--- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
@@ -38,3 +38,25 @@  sdhci@c8000200 {
 	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@700b0000 {
+	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";
+};