linux-kernel - [PATCH v4 3/3] arm64: dts: qcom: Specify dload address for msm8916 and msm8996

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Date:   Mon, 14 Aug 2017 15:46:19 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org
Subject: [PATCH v4 3/3] arm64: dts: qcom: Specify dload address for msm8916 and msm8996

On msm8916 and msm8996 boards a secure io-write is used to write the
magic for selecting "download mode", specify this address in the
DeviceTree.

Note that qcom_scm.download_mode=1 must be specified on the kernel
command line for the kernel to attempt selecting download mode.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---

Changes since v3:
- Added tcsr offsets
- Corrected node address of tcsr

 arch/arm64/boot/dts/qcom/msm8916.dtsi | 2 ++
 arch/arm64/boot/dts/qcom/msm8996.dtsi | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 039991f80831..ecc0775d78a9 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -241,6 +241,8 @@
 			clocks = <&gcc GCC_CRYPTO_CLK>, <&gcc GCC_CRYPTO_AXI_CLK>, <&gcc GCC_CRYPTO_AHB_CLK>;
 			clock-names = "core", "bus", "iface";
 			#reset-cells = <1>;
+
+			qcom,dload-mode = <&tcsr 0x6100>;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
index 8f085716e258..a6d1d01df670 100644
--- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
@@ -261,6 +261,8 @@
 	firmware {
 		scm {
 			compatible = "qcom,scm-msm8996";
+
+			qcom,dload-mode = <&tcsr 0x13000>;
 		};
 	};
 
@@ -287,6 +289,11 @@
 			reg = <0x740000 0x20000>;
 		};
 
+		tcsr: syscon@...000 {
+			compatible = "qcom,tcsr-msm8996", "syscon";
+			reg = <0x7a0000 0x18000>;
+		};
+
 		intc: interrupt-controller@...0000 {
 			compatible = "arm,gic-v3";
 			#interrupt-cells = <3>;
-- 
2.12.0