Re: [PATCH] arm64: dts: qcom: sdm845: Add SCM DT node

From: Sibi Sankar
Date: Mon Oct 29 2018 - 10:54:49 EST


Hi Stan,
Thanks for the review!

On 2018-10-29 15:02, Stanimir Varbanov wrote:
Hi Sibi,

On 10/26/2018 03:25 PM, Sibi Sankar wrote:
Add SCM DT node to enable SCM functionality on SDM845.

Signed-off-by: Sibi Sankar <sibis@xxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/sdm845.dtsi | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index b72bdb0a31a5..fad22acfda4d 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -221,6 +221,12 @@
};
};

+ firmware {
+ scm {
+ compatible = "qcom,scm-sdm845", "qcom,scm";
+ };
+ };

What will happen if the platform is without tz firmware? I'd move this
DT node in sdm845-mtp.dts or at least make it status = disabled.

Even in the absence of tz firmware, ATF is expected to implement the necessary
handlers for the SMC calls so I don't think it is necessary to keep it disabled.

--
-- Sibi Sankar --
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.