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SubjectRe: [PATCH 3/4] arm64: dts: ti: k3-j721e-main: Add the MAIN domain watchdog instances
From
Hi Neha

On 3/26/2024 5:57 PM, Neha Malcom Francis wrote:
> There are 10 watchdog instances in the MAIN domain:
> * one each for the 2 A72 cores
> * one for the GPU core
> * one for the C7x core
> * one each for the 2 C66x cores
> * one each for the 4 R5F cores
>
> Currently, the devicetree only describes watchdog instances for the A72
> cores and enables them. Describe the remaining but reserve them as they
> will be used by their respective firmware.
>
> Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
> ---
> arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 93 +++++++++++++++++++++++
> 1 file changed, 93 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> index c7eafbc862f9..d8930b8ea8ec 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> @@ -2157,6 +2157,99 @@ watchdog1: watchdog@2210000 {
> assigned-clock-parents = <&k3_clks 253 5>;
> };
>

Looking at TRM, SPRUIJ7*3–December 2018–Revised March 2019,

Table 12-22646. RTI Instances, says There is gap in numbering

RTI0, RTI1, RTI15 and so on

IMO, labels for watchdog should be as per TRM.

eg watchdog2 to watchdog15, But I don't have strong opinion on either .

Let maintainer suggest on this



> + /*
> + * The following RTI instances are coupled with MCU R5Fs, c7x and
> + * GPU so keeping them reserved as these will be used by their
> + * respective firmware
> + */
> + watchdog2: watchdog@22f0000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x22f0000 0x00 0x100>;
> + clocks = <&k3_clks 257 1>;
> + power-domains = <&k3_pds 257 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 257 1>;
> + assigned-clock-parents = <&k3_clks 257 5>;
> + /* reserved for GPU */
> + status = "reserved";
> + };

Please help me to understand, where from you got it for GPU,

May be I am looking at wrong data, Again above TRM

Table 12-22645. RTI Hardware Requests. RTI-15 says esm0

> +
> + watchdog3: watchdog@2300000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x2300000 0x00 0x100>;
> + clocks = <&k3_clks 256 1>;
> + power-domains = <&k3_pds 256 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 256 1>;
> + assigned-clock-parents = <&k3_clks 256 5>;
> + /* reserved for C7X */
> + status = "reserved";

This I see in above table for Compute Cluster


> + };
> +
> + watchdog4: watchdog@2380000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x2380000 0x00 0x100>;
> + clocks = <&k3_clks 254 1>;
> + power-domains = <&k3_pds 254 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 254 1>;
> + assigned-clock-parents = <&k3_clks 254 5>;
> + /* reserved for C66X_0 */
> + status = "reserved";
> + };
> +
> + watchdog5: watchdog@2390000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x2390000 0x00 0x100>;
> + clocks = <&k3_clks 255 1>;
> + power-domains = <&k3_pds 255 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 255 1>;
> + assigned-clock-parents = <&k3_clks 255 5>;
> + /* reserved for C66X_1 */
> + status = "reserved";
> + };
> +
> + watchdog6: watchdog@23c0000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x23c0000 0x00 0x100>;
> + clocks = <&k3_clks 258 1>;
> + power-domains = <&k3_pds 258 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 258 1>;
> + assigned-clock-parents = <&k3_clks 258 5>;
> + /* reserved for MAIN_R5F0_0 */

TRM says, this covers both MAIN_R5F0_0 and MAIN_R5F0_1.

Suggest , if split is done at fw level

> + status = "reserved";
> + };
> +
> + watchdog7: watchdog@23d0000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x23d0000 0x00 0x100>;
> + clocks = <&k3_clks 259 1>;
> + power-domains = <&k3_pds 259 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 259 1>;
> + assigned-clock-parents = <&k3_clks 259 5>;
> + /* reserved for MAIN_R5F0_1 */
> + status = "reserved";

TRM says, this covers both MAIN_R5F0_0 and MAIN_R5F0_1.

Suggest , if split is done at fw level

> + };
> +
> + watchdog8: watchdog@23e0000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x23e0000 0x00 0x100>;
> + clocks = <&k3_clks 260 1>;
> + power-domains = <&k3_pds 260 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 260 1>;
> + assigned-clock-parents = <&k3_clks 260 5>;
> + /* reserved for MAIN_R5F1_0 */
> + status = "reserved";
> + };


TRM says, this covers both MAIN_R5F1_0 and MAIN_R5F1_1.

Suggest , if split is done at fw level

> +
> + watchdog9: watchdog@23f0000 {
> + compatible = "ti,j7-rti-wdt";
> + reg = <0x00 0x23f0000 0x00 0x100>;
> + clocks = <&k3_clks 261 1>;
> + power-domains = <&k3_pds 261 TI_SCI_PD_EXCLUSIVE>;
> + assigned-clocks = <&k3_clks 261 1>;
> + assigned-clock-parents = <&k3_clks 261 5>;
> + /* reserved for MAIN_R5F1_1 */

TRM says, this covers both MAIN_R5F1_0 and MAIN_R5F1_1.

Suggest , if split is done at fw level

> + status = "reserved";
> + };
> +
> main_r5fss0: r5fss@5c00000 {
> compatible = "ti,j721e-r5fss";
> ti,cluster-mode = <1>;

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