netdev - [PATCH v2 1/3] arm64: dts: imx93: add the Flex-CAN stop mode by GPR

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-next>] [day] [month] [year] [list]

Message-Id: <20230726090909.3417030-1-haibo.chen@nxp.com>
Date: Wed, 26 Jul 2023 17:09:07 +0800
From: haibo.chen@....com
To: robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	wg@...ndegger.com,
	mkl@...gutronix.de
Cc: kernel@...gutronix.de,
	linux-imx@....com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	haibo.chen@....com,
	devicetree@...r.kernel.org,
	linux-can@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH v2 1/3] arm64: dts: imx93: add the Flex-CAN stop mode by GPR

From: Haibo Chen <haibo.chen@....com>

imx93 A0 chip use the internal q-channel handshake signal in LPCG
and CCM to automatically handle the Flex-CAN stop mode. But this
method meet issue when do the system PM stress test. IC can't fix
it easily. So in the new imx93 A1 chip, IC drop this method, and
involve back the old way，use the GPR method to trigger the Flex-CAN
stop mode signal. Now NXP claim to drop imx93 A0, and only support
imx93 A1. So here add the stop mode through GPR.

Signed-off-by: Haibo Chen <haibo.chen@....com>
---
 arch/arm64/boot/dts/freescale/imx93.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi b/arch/arm64/boot/dts/freescale/imx93.dtsi
index 4ec9df78f205..d2040019e9c7 100644
--- a/arch/arm64/boot/dts/freescale/imx93.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
@@ -319,6 +319,7 @@ flexcan1: can@...a0000 {
 				assigned-clock-parents = <&clk IMX93_CLK_SYS_PLL_PFD1_DIV2>;
 				assigned-clock-rates = <40000000>;
 				fsl,clk-source = /bits/ 8 <0>;
+				fsl,stop-mode = <&anomix_ns_gpr 0x14 0>;
 				status = "disabled";
 			};
 
@@ -591,6 +592,7 @@ flexcan2: can@...b0000 {
 				assigned-clock-parents = <&clk IMX93_CLK_SYS_PLL_PFD1_DIV2>;
 				assigned-clock-rates = <40000000>;
 				fsl,clk-source = /bits/ 8 <0>;
+				fsl,stop-mode = <&wakeupmix_gpr 0x0C 2>;
 				status = "disabled";
 			};
 
-- 
2.34.1