[PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

[PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

[Neha Malcom Francis]

MAIN_PLL0 has a flag set in DM (Device Manager) that removes it's
capability to re-initialise clock frequencies. CPTS and RGMII has
MAIN_PLL3 as their parent which does not have this flag. While RGMII
needs this reinitialisation to default frequency to be able to get
250MHz with its divider, CPTS can not get its required 200MHz with its
divider. Thus, move CPTS clock parent on J721S2 from MAIN_PLL3_HSDIV1 to
MAIN_PLL0_HSDIV6.

(Note: even GTC will be moved from MAIN_PLL3 to MAIN_PLL0 in U-Boot side
for the same reason)

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
---
 arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi       | 2 ++
 arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
index 2dd7865f7654..331e0c9b4db8 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
@@ -738,6 +738,8 @@ cpts@310d0000 {
 			reg-names = "cpts";
 			clocks = <&k3_clks 226 5>;
 			clock-names = "cpts";
+			assigned-clocks = <&k3_clks 226 5>; /* NAVSS0_CPTS_0_RCLK */
+			assigned-clock-parents = <&k3_clks 226 7>; /* MAIN_0_HSDIVOUT6_CLK */
 			interrupts-extended = <&main_navss_intr 391>;
 			interrupt-names = "cpts";
 			ti,cpts-periodic-outputs = <6>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
index a353705a7463..b55a3e9daf85 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
@@ -333,6 +333,8 @@ cpts@3d000 {
 			reg = <0x0 0x3d000 0x0 0x400>;
 			clocks = <&k3_clks 29 3>;
 			clock-names = "cpts";
+			assigned-clocks = <&k3_clks 29 3>; /* CPTS_RFT_CLK */
+			assigned-clock-parents = <&k3_clks 29 5>; /* MAIN_0_HSDIVOUT6_CLK */
 			interrupts-extended = <&gic500 GIC_SPI 858 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "cpts";
 			ti,cpts-ext-ts-inputs = <4>;
-- 
2.34.1

Re: [PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

[Nishanth Menon]

On 16:34-20230605, Neha Malcom Francis wrote:
> MAIN_PLL0 has a flag set in DM (Device Manager) that removes it's
> capability to re-initialise clock frequencies. CPTS and RGMII has
> MAIN_PLL3 as their parent which does not have this flag. While RGMII
> needs this reinitialisation to default frequency to be able to get
> 250MHz with its divider, CPTS can not get its required 200MHz with its
> divider. Thus, move CPTS clock parent on J721S2 from MAIN_PLL3_HSDIV1 to
> MAIN_PLL0_HSDIV6.
> 
> (Note: even GTC will be moved from MAIN_PLL3 to MAIN_PLL0 in U-Boot side
> for the same reason)
> 
> Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
> ---
>  arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi       | 2 ++
>  arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 2 ++


Is this the only device with this change? or are we doing that across
the board? if so, could you please do this in a single series so that we
don't have a mix?

>  2 files changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> index 2dd7865f7654..331e0c9b4db8 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> @@ -738,6 +738,8 @@ cpts@310d0000 {
>  			reg-names = "cpts";
>  			clocks = <&k3_clks 226 5>;
>  			clock-names = "cpts";
> +			assigned-clocks = <&k3_clks 226 5>; /* NAVSS0_CPTS_0_RCLK */
> +			assigned-clock-parents = <&k3_clks 226 7>; /* MAIN_0_HSDIVOUT6_CLK */
>  			interrupts-extended = <&main_navss_intr 391>;
>  			interrupt-names = "cpts";
>  			ti,cpts-periodic-outputs = <6>;
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> index a353705a7463..b55a3e9daf85 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> @@ -333,6 +333,8 @@ cpts@3d000 {
>  			reg = <0x0 0x3d000 0x0 0x400>;
>  			clocks = <&k3_clks 29 3>;
>  			clock-names = "cpts";
> +			assigned-clocks = <&k3_clks 29 3>; /* CPTS_RFT_CLK */
> +			assigned-clock-parents = <&k3_clks 29 5>; /* MAIN_0_HSDIVOUT6_CLK */
>  			interrupts-extended = <&gic500 GIC_SPI 858 IRQ_TYPE_LEVEL_HIGH>;
>  			interrupt-names = "cpts";
>  			ti,cpts-ext-ts-inputs = <4>;
> -- 
> 2.34.1
> 

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D

Re: [PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

[Neha Malcom Francis]

Hi Nishanth

On 05/06/23 17:19, Nishanth Menon wrote:
> On 16:34-20230605, Neha Malcom Francis wrote:
>> MAIN_PLL0 has a flag set in DM (Device Manager) that removes it's
>> capability to re-initialise clock frequencies. CPTS and RGMII has
>> MAIN_PLL3 as their parent which does not have this flag. While RGMII
>> needs this reinitialisation to default frequency to be able to get
>> 250MHz with its divider, CPTS can not get its required 200MHz with its
>> divider. Thus, move CPTS clock parent on J721S2 from MAIN_PLL3_HSDIV1 to
>> MAIN_PLL0_HSDIV6.
>>
>> (Note: even GTC will be moved from MAIN_PLL3 to MAIN_PLL0 in U-Boot side
>> for the same reason)
>>
>> Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
>> ---
>>   arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi       | 2 ++
>>   arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 2 ++
> 
> 
> Is this the only device with this change? or are we doing that across
> the board? if so, could you please do this in a single series so that we
> don't have a mix?
> 

Currently, this is the only device that has moved this flag in DM side. 
None of the other devices (except for J784S4 which also made a similar 
change both in DM and U-BOOT) have this change in flag for the upcoming 
firmware release.

>>   2 files changed, 4 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
>> index 2dd7865f7654..331e0c9b4db8 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
>> @@ -738,6 +738,8 @@ cpts@310d0000 {
>>   			reg-names = "cpts";
>>   			clocks = <&k3_clks 226 5>;
>>   			clock-names = "cpts";
>> +			assigned-clocks = <&k3_clks 226 5>; /* NAVSS0_CPTS_0_RCLK */
>> +			assigned-clock-parents = <&k3_clks 226 7>; /* MAIN_0_HSDIVOUT6_CLK */
>>   			interrupts-extended = <&main_navss_intr 391>;
>>   			interrupt-names = "cpts";
>>   			ti,cpts-periodic-outputs = <6>;
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>> index a353705a7463..b55a3e9daf85 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>> @@ -333,6 +333,8 @@ cpts@3d000 {
>>   			reg = <0x0 0x3d000 0x0 0x400>;
>>   			clocks = <&k3_clks 29 3>;
>>   			clock-names = "cpts";
>> +			assigned-clocks = <&k3_clks 29 3>; /* CPTS_RFT_CLK */
>> +			assigned-clock-parents = <&k3_clks 29 5>; /* MAIN_0_HSDIVOUT6_CLK */
>>   			interrupts-extended = <&gic500 GIC_SPI 858 IRQ_TYPE_LEVEL_HIGH>;
>>   			interrupt-names = "cpts";
>>   			ti,cpts-ext-ts-inputs = <4>;
>> -- 
>> 2.34.1
>>
> 

-- 
Thanking You
Neha Malcom Francis

Re: [PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

[Vignesh Raghavendra]

Hi Neha Malcom Francis,

On Mon, 05 Jun 2023 16:34:43 +0530, Neha Malcom Francis wrote:
> MAIN_PLL0 has a flag set in DM (Device Manager) that removes it's
> capability to re-initialise clock frequencies. CPTS and RGMII has
> MAIN_PLL3 as their parent which does not have this flag. While RGMII
> needs this reinitialisation to default frequency to be able to get
> 250MHz with its divider, CPTS can not get its required 200MHz with its
> divider. Thus, move CPTS clock parent on J721S2 from MAIN_PLL3_HSDIV1 to
> MAIN_PLL0_HSDIV6.
> 
> [...]

I have applied the following to branch ti-k3-dts-next on [1].
Thank you!

[1/1] arm64: dts: ti: k3-j721s2: Change CPTS clock parent
      commit: 1f36d0e8be3ae7717c801e954275fba6247b2f46

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent up the chain during
the next merge window (or sooner if it is a relevant bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux.git
--
Vignesh