linux-kernel - [Patch v3 1/8] dt/bindings: firmware: Add Qualcomm SCM binding

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Message-Id: <1462402245-18295-2-git-send-email-andy.gross@linaro.org>
Date:	Wed,  4 May 2016 17:50:38 -0500
From:	Andy Gross <andy.gross@...aro.org>
To:	linux-arm-msm@...r.kernel.org
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stephen Boyd <sboyd@...eaurora.org>,
	Bjorn Andersson <bjorn.andersson@...aro.org>,
	jilai wang <jilaiw@...eaurora.org>, devicetree@...r.kernel.org,
	Andy Gross <andy.gross@...aro.org>
Subject: [Patch v3 1/8] dt/bindings: firmware: Add Qualcomm SCM binding

This patch adds the device tree support for the Qualcomm SCM firmware.

Signed-off-by: Andy Gross <andy.gross@...aro.org>
---
 .../devicetree/bindings/firmware/qcom,scm.txt      | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/firmware/qcom,scm.txt

diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.txt b/Documentation/devicetree/bindings/firmware/qcom,scm.txt
new file mode 100644
index 0000000..ee7cd12
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/qcom,scm.txt
@@ -0,0 +1,26 @@
+QCOM Secure Channel Manager (SCM)
+
+Qualcomm processors include an interface to communicate to the secure firmware.
+This interface allows for clients to request different types of actions.  These
+can include CPU power up/down, HDCP requests, loading of firmware, and other
+assorted actions.
+
+Required properties:
+- compatible: must contain one of the following:
+ * "qcom,scm-a-family" for A family Qualcomm processors (APQ8064, MSM8960, etc)
+ * "qcom,scm" for B family and later processors (MSM8916, APQ8084, MSM8974, etc)
+- clocks: One to three clocks may be required based on compatible.
+ * Only core clock required for "qcom,scm-apq8064"
+ * Core, iface, and bus clocks required for "qcom,scm"
+- clock-names: Must contain "core" for the core clock, "iface" for the interface
+  clock and "bus" for the bus clock per the requirements of the compatible.
+
+Example for MSM8916:
+
+	firmware {
+		scm {
+			compatible = "qcom,scm";
+			clocks = <&gcc GCC_CRYPTO_CLK> , <&gcc GCC_CRYPTO_AXI_CLK>, <&gcc GCC_CRYPTO_AHB_CLK>;
+			clock-names = "core", "bus", "iface";
+		};
+	};
-- 
1.9.1