diff mbox series

[1/2] arm64: dts: imx93: add the Flex-CAN stop mode by GPR

Message ID 20230726035032.3073951-1-haibo.chen@nxp.com (mailing list archive)
State Superseded
Headers show
Series [1/2] arm64: dts: imx93: add the Flex-CAN stop mode by GPR | expand

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netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 9 this patch: 9
netdev/cc_maintainers warning 3 maintainers not CCed: festevam@gmail.com peng.fan@nxp.com linux-arm-kernel@lists.infradead.org
netdev/build_clang success Errors and warnings before: 9 this patch: 9
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 9 this patch: 9
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 14 lines checked
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Commit Message

Bough Chen July 26, 2023, 3:50 a.m. UTC 
From: Haibo Chen <haibo.chen@nxp.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@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx93.dtsi | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi b/arch/arm64/boot/dts/freescale/imx93.dtsi
index 8643612ace8c..d8113a9b11f2 100644
--- a/arch/arm64/boot/dts/freescale/imx93.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
@@ -280,6 +280,7 @@  flexcan1: can@443a0000 {
 				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";
 			};
 
@@ -532,6 +533,7 @@  flexcan2: can@425b0000 {
 				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";
 			};