linux-kernel - [PATCH v2] dt-bindings: mmc: arasan,sdci: Add gate property for Xilinx platforms

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Date:   Tue, 14 Nov 2023 15:53:21 +0530
From:   Sai Krishna Potthuri <sai.krishna.potthuri@....com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Adrian Hunter <adrian.hunter@...el.com>
CC:     <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <git@....com>,
        <saikrishna12468@...il.com>
Subject: [PATCH v2] dt-bindings: mmc: arasan,sdci: Add gate property for Xilinx platforms

From: Swati Agarwal <swati.agarwal@....com>

Add gate property in example node for Xilinx platforms which will be used
to ungate the DLL clock. DLL clock is required for higher frequencies like
50MHz, 100MHz and 200MHz.
DLL clock is automatically selected by the SD controller when the SD
output clock frequency is more than 25 MHz.

Signed-off-by: Swati Agarwal <swati.agarwal@....com>
Co-developed-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
Note: This patch only updates the example nodes with the gate property for
Xilinx platforms.

Changes in v2:
- Updated subject prefix to match with the subsystem.

 Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
index 3e99801f77d2..9075add020bf 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
@@ -226,8 +226,8 @@ examples:
           interrupt-parent = <&gic>;
           interrupts = <0 48 4>;
           reg = <0xff160000 0x1000>;
-          clocks = <&clk200>, <&clk200>;
-          clock-names = "clk_xin", "clk_ahb";
+          clocks = <&clk200>, <&clk200>, <&clk1200>;
+          clock-names = "clk_xin", "clk_ahb", "gate";
           clock-output-names = "clk_out_sd0", "clk_in_sd0";
           #clock-cells = <1>;
           clk-phase-sd-hs = <63>, <72>;
@@ -239,8 +239,8 @@ examples:
           interrupt-parent = <&gic>;
           interrupts = <0 126 4>;
           reg = <0xf1040000 0x10000>;
-          clocks = <&clk200>, <&clk200>;
-          clock-names = "clk_xin", "clk_ahb";
+          clocks = <&clk200>, <&clk200>, <&clk1200>;
+          clock-names = "clk_xin", "clk_ahb", "gate";
           clock-output-names = "clk_out_sd0", "clk_in_sd0";
           #clock-cells = <1>;
           clk-phase-sd-hs = <132>, <60>;
-- 
2.25.1