linux-kernel - [PATCH 1/2] dt-bindings: mmc: sdhci-msm: Add flag for restoring dll

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Message-Id: <1537887875-29494-2-git-send-email-vbadigan@codeaurora.org>
Date:   Tue, 25 Sep 2018 20:34:34 +0530
From:   Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org, robh+dt@...nel.org
Cc:     asutoshd@...eaurora.org, riteshh@...eaurora.org,
        stummala@...eaurora.org, sayalil@...eaurora.org,
        evgreen@...omium.org, dianders@...gle.com,
        Veerabhadrarao Badiganti <vbadigan@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-mmc@...r.kernel.org (open list:MULTIMEDIA CARD (MMC), SECURE
        DIGITAL (SD) AND...),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/2] dt-bindings: mmc: sdhci-msm: Add flag for restoring dll

The dll settings of SDHC controller needs to be restored whenever
controller clocks are gated. This restoration is needed only on
few SDHCI-MSM controllers. This dt flag indicates whether dll
restoration is needed or not.

Signed-off-by: Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
---
 Documentation/devicetree/bindings/mmc/sdhci-msm.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 3720385..207ce36 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -31,6 +31,8 @@ Optional properties:
 					BUS_OFF states in power irq. Should be specified in
 					pairs (lpm, hpm), for BUS_OFF and BUS_ON respectively.
 					Units uA.
+- qcom,restore-dll-config - Flag indicates that restoration of dll config after clock gating
+			    is needed on given platform. This wouldn't be needed for every MSM.
 Example:
 
 	sdhc_1: sdhci@...24900 {
@@ -49,6 +51,8 @@ Example:
 
 		clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>;
 		clock-names = "core", "iface";
+
+		qcom,restore-dll-config;
 	};
 
 	sdhc_2: sdhci@...a4900 {
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project