Re: [PATCH 1/1] arm64: dts: imx8mp: Add coresight trace components
From: Suzuki K Poulose
Date: Tue Jul 04 2023 - 11:20:26 EST
On 05/05/2023 20:51, Frank Li wrote:
Add coresight trace components (ETM, ETF, ETB and Funnel).
┌───────┐ ┌───────┐ ┌───────┐
│ CPU0 ├─►│ ETM0 ├─►│ │
└───────┘ └───────┘ │ │
│ │
┌───────┐ ┌───────┐ │ ATP │
│ CPU1 ├─►│ ETM1 ├─►│ │
└───────┘ └───────┘ │ │
│ FUNNEL│
┌───────┐ ┌───────┐ │ │
│ CPU2 ├─►│ ETM2 ├─►│ │
└───────┘ └───────┘ │ │ ┌─────┐ ┌─────┐
│ │ │ │ │ │
┌───────┐ ┌───────┐ │ │ │ M7 │ │ DSP │
│ CPU3 ├─►│ ETM3 ├─►│ │ │ │ │ │
└───────┘ └───────┘ └───┬───┘ └──┬──┘ └──┬──┘ AXI
│ │ │ ▲
▼ ▼ ▼ │
┌───────────────────────────┐ ┌─────┐ ┌─┴──┐
│ ATP FUNNEL ├──►│ETF ├─► │ETR │
└───────────────────────────┘ └─────┘ └────┘
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
arch/arm64/boot/dts/freescale/imx8mp.dtsi | 179 ++++++++++++++++++++++
1 file changed, 179 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index a19224fe1a6a..0fa74477b9e1 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -304,6 +304,185 @@ soc: soc@0 {
nvmem-cells = <&imx8mp_uid>;
nvmem-cell-names = "soc_unique_id";
+ etm0: etm@28440000 {
+ compatible = "arm,coresight-etm4x", "arm,primecell";
+ reg = <0x28440000 0x10000>;
+ arm,primecell-periphid = <0xbb95d>;
Why is this needed (and for all the ETMs) ?
Suzuki