linux-kernel - [PATCH 3/3] arm64: dts: qcom: sm8450-nagara: Disable empty i2c bus

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 13 Dec 2022 14:25:17 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org
Cc:     marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] arm64: dts: qcom: sm8450-nagara: Disable empty i2c bus

As much as it hurts me, there is no FM radio chips on these devices.
It seems to be present on Japanese models, but these are not available
globally and differ in a few more ways anyway (such as a super high-tech
NFC chip). Since it's the only subdevice of its I2C host bus, disable
said bus to save some power.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
index 6e100b97eaed..c7c20d374f77 100644
--- a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
@@ -604,13 +604,6 @@ &i2c9 {
 	/* NXP SN1X0 NFC @ 28 */
 };
 
-&i2c13 {
-	clock-frequency = <400000>;
-	status = "okay";
-
-	/* Richwave RTC6226 FM Radio Receiver @ 64 */
-};
-
 &i2c14 {
 	clock-frequency = <1000000>;
 	status = "okay";
-- 
2.39.0