linux-kernel - [PATCH 1/2] dt-bindings: clock: Introduce QCOM RPMh clock bindings

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Message-Id: <1525258277-3478-2-git-send-email-tdas@codeaurora.org>
Date:   Wed,  2 May 2018 16:21:16 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Stephen Boyd <sboyd@...eaurora.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Odelu Kukatla <okukatla@...eaurora.org>,
        Amit Nischal <anischal@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Taniya Das <tdas@...eaurora.org>
Subject: [PATCH 1/2] dt-bindings: clock: Introduce QCOM RPMh clock bindings

Add RPMh clock device bindings for Qualcomm Technology Inc's SoCs. These
devices would be used for communicating resource state requests to control
the clocks managed by RPMh.

Signed-off-by: Taniya Das <tdas@...eaurora.org>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 .../devicetree/bindings/clock/qcom,rpmh-clk.txt    | 46 ++++++++++++++++++++++
 include/dt-bindings/clock/qcom,rpmh.h              | 22 +++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/qcom,rpmh-clk.txt
 create mode 100644 include/dt-bindings/clock/qcom,rpmh.h

diff --git a/Documentation/devicetree/bindings/clock/qcom,rpmh-clk.txt b/Documentation/devicetree/bindings/clock/qcom,rpmh-clk.txt
new file mode 100644
index 0000000..2632cae
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,rpmh-clk.txt
@@ -0,0 +1,46 @@
+Qualcomm Technologies, Inc. RPMh Clocks
+-------------------------------------------------------
+
+Resource Power Manager Hardened (RPMh) manages shared resources on
+some Qualcomm Technologies Inc. SoCs. It accepts clock requests from
+other hardware subsystems via RSC to control clocks.
+
+Required properties :
+- compatible : shall contain "qcom,sdm845-rpmh-clk"
+
+- #clock-cells : must contain 1
+
+Optional properties :
+
+These below properities would be required in the cases where the parent of the
+clocks would be "xo_board_div". The default parent for the clock is "xo_board".
+
+- assigned-clocks: from the common clock binding;
+		should be: clock specifier for each output clock of this
+		provider node
+
+- assigned-clock-parents: from the common clock binding;
+		should be: phandle of input clock listed in clocks
+		property
+Example :
+
+#include <dt-bindings/clock/qcom,rpmh.h>
+
+	&apps_rsc {
+		rpmhcc: clock-controller {
+			compatible = "qcom,sdm845-rpmh-clk";
+			#clock-cells = <1>;
+			assigned-clocks = <&clock_rpmh RPMH_CXO_CLK>,
+					<&clock_rpmh RPMH_CXO_CLK_A>,
+					<&clock_rpmh RPMH_LN_BB_CLK2>,
+					<&clock_rpmh RPMH_LN_BB_CLK2_A>,
+					<&clock_rpmh RPMH_LN_BB_CLK3>,
+					<&clock_rpmh RPMH_LN_BB_CLK3_A>;
+			assigned-clock-parents = <&xo_board_div>,
+						<&xo_board_div>,
+						<&xo_board_div>,
+						<&xo_board_div>,
+						<&xo_board_div>,
+						<&xo_board_div>,
+		};
+	};
diff --git a/include/dt-bindings/clock/qcom,rpmh.h b/include/dt-bindings/clock/qcom,rpmh.h
new file mode 100644
index 0000000..f48fbd6
--- /dev/null
+++ b/include/dt-bindings/clock/qcom,rpmh.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2018, The Linux Foundation. All rights reserved. */
+
+
+#ifndef _DT_BINDINGS_CLK_MSM_RPMH_H
+#define _DT_BINDINGS_CLK_MSM_RPMH_H
+
+/* RPMh controlled clocks */
+#define RPMH_CXO_CLK				0
+#define RPMH_CXO_CLK_A				1
+#define RPMH_LN_BB_CLK2				2
+#define RPMH_LN_BB_CLK2_A			3
+#define RPMH_LN_BB_CLK3				4
+#define RPMH_LN_BB_CLK3_A			5
+#define RPMH_RF_CLK1				6
+#define RPMH_RF_CLK1_A				7
+#define RPMH_RF_CLK2				8
+#define RPMH_RF_CLK2_A				9
+#define RPMH_RF_CLK3				10
+#define RPMH_RF_CLK3_A				11
+
+#endif
--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the  Linux Foundation.