linux-kernel - [PATCH v4 3/8] dt-bindings: phy: qcom-ufs: Add resets property

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Date:   Wed, 13 Feb 2019 15:25:21 -0800
From:   Evan Green <evgreen@...omium.org>
To:     Andy Gross <andy.gross@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        Can Guo <cang@...eaurora.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        Asutosh Das <asutoshd@...eaurora.org>,
        Evan Green <evgreen@...omium.org>,
        Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v4 3/8] dt-bindings: phy: qcom-ufs: Add resets property

Add a resets property to the PHY that represents the PHY reset
register in the UFS controller itself. This better describes the
complete specification of the PHY, and allows the PHY to perform
its initialization in a single function, rather than relying on
back-channel sequencing of initialization through the PHY framework.

Signed-off-by: Evan Green <evgreen@...omium.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
---

Changes in v4: None
Changes in v3: None
Changes in v2:
- Added resets to example (Stephen).

 Documentation/devicetree/bindings/ufs/ufs-qcom.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/ufs/ufs-qcom.txt b/Documentation/devicetree/bindings/ufs/ufs-qcom.txt
index 21d9a93db2e9..fd59f93e9556 100644
--- a/Documentation/devicetree/bindings/ufs/ufs-qcom.txt
+++ b/Documentation/devicetree/bindings/ufs/ufs-qcom.txt
@@ -29,6 +29,7 @@ Optional properties:
 - vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply
 - vddp-ref-clk-supply   : phandle to UFS device ref_clk pad power supply
 - vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply
+- resets : specifies the PHY reset in the UFS controller
 
 Example:
 
@@ -51,9 +52,11 @@ Example:
 			<&clock_gcc clk_ufs_phy_ldo>,
 			<&clock_gcc clk_gcc_ufs_tx_cfg_clk>,
 			<&clock_gcc clk_gcc_ufs_rx_cfg_clk>;
+		resets = <&ufshc 0>;
 	};
 
-	ufshc@...98000 {
+	ufshc: ufshc@...98000 {
+		#reset-cells = <1>;
 		...
 		phys = <&ufsphy1>;
 		phy-names = "ufsphy";
-- 
2.20.1