linux-kernel - Re: [PATCH v2 5/5] arm64: dts: ti: k3-j7200-mcu: Add the MCU domain watchdog instances

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Date: Fri, 12 Apr 2024 10:35:58 +0530
From: Neha Malcom Francis <n-francis@...com>
To: "Kumar, Udit" <u-kumar1@...com>, <robh@...nel.org>, <conor+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <vigneshr@...com>, <nm@...com>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kristo@...nel.org>
Subject: Re: [PATCH v2 5/5] arm64: dts: ti: k3-j7200-mcu: Add the MCU domain
 watchdog instances

Hi Udit

On 12/04/24 10:33, Kumar, Udit wrote:
> Hi Neha
> 
> On 4/12/2024 9:55 AM, Neha Malcom Francis wrote:
>> There are 2 watchdog instances in the MCU domain. These instances are
>> coupled with the MCU domain R55 instances. Reserve them as they are not
>> used by A72.
>>
>> Signed-off-by: Neha Malcom Francis <n-francis@...com>
>> ---
>> Changes since v1:
>> - patch added
>>
>>   .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi      | 26 +++++++++++++++++++
>>   1 file changed, 26 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi 
>> b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
>> index 7cf21c99956e..d1a42c3f30c0 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
>> @@ -686,4 +686,30 @@ mcu_mcan1: can@...68000 {
>>           bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
>>           status = "disabled";
>>       };
>> +
>> +    /*
>> +     * The 2 RTI instances are couple with MCU R5Fs so keeping them
>> +     * reserved as these will be used by their respective firmware
>> +     */
>> +    mcu_watchdog0: watchdog@...00000 {
>> +        compatible = "ti,j7-rti-wdt";
>> +        reg = <0x00 0x40600000 0x00 0xbd>;
> 
> 
> please refer  Table 2-3. MCU Domain Memory Map of TRM.
> 
> Size of wdt is 0x100 , with this change in size from 0xbd to 0x100.
> 
> you can use
> 
> Reviewed-by: Udit Kumar <u-kumar1@...com>  for whole series

Thank you for catching that! Sending v3 soon!

> 
>> +        clocks = <&k3_clks 262 1>;
>> +        power-domains = <&k3_pds 262 TI_SCI_PD_EXCLUSIVE>;
>> +        assigned-clocks = <&k3_clks 262 1>;
>> +        assigned-clock-parents = <&k3_clks 262 5>;
>> +        /* reserved for MCU_R5F0_0 */
>> +        status = "reserved";
>> +    };
>> +
>> +    mcu_watchdog1: watchdog@...10000 {
>> +        compatible = "ti,j7-rti-wdt";
>> +        reg = <0x00 0x40610000 0x00 0xbd>;
>> +        clocks = <&k3_clks 263 1>;
>> +        power-domains = <&k3_pds 263 TI_SCI_PD_EXCLUSIVE>;
>> +        assigned-clocks = <&k3_clks 263 1>;
>> +        assigned-clock-parents = <&k3_clks 263 5>;
>> +        /* reserved for MCU_R5F0_1 */
>> +        status = "reserved";
>> +    };
>>   };

-- 
Thanking You
Neha Malcom Francis