linux-kernel - Re: (subset) [PATCH v3 12/15] clk: samsung: Add CPU clock support for Exynos850

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Message-Id: <170887747270.215710.14391018888369319254.b4-ty@linaro.org>
Date: Sun, 25 Feb 2024 17:11:12 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Sylwester Nawrocki <s.nawrocki@...sung.com>, 
 Chanwoo Choi <cw00.choi@...sung.com>, 
 Sam Protsenko <semen.protsenko@...aro.org>
Cc: Alim Akhtar <alim.akhtar@...sung.com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Tomasz Figa <tomasz.figa@...il.com>, 
 linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org
Subject: Re: (subset) [PATCH v3 12/15] clk: samsung: Add CPU clock support
 for Exynos850


On Sat, 24 Feb 2024 14:20:50 -0600, Sam Protsenko wrote:
> Implement CPU clock control for Exynos850 SoC. It follows the same
> procedure which is already implemented for other SoCs in clk-cpu.c:
> 
> 1. Set the correct rate for the alternate parent (if needed) before
>    switching to use it as the CPU clock
> 2. Switch to the alternate parent, so the CPU continues to get clocked
>    while the PLL is being re-configured
> 3. Adjust the dividers for the CPU related buses (ACLK, ATCLK, etc)
> 4. Re-configure the PLL for the new CPU clock rate. It's done
>    automatically, as the CPU clock rate change propagates to the PLL
>    clock, because the CPU clock has CLK_SET_RATE_PARENT flag set in
>    exynos_register_cpu_clock()
> 5. Once the PLL is locked, set it back as the CPU clock source
> 6. Set alternate parent clock rate back to max speed
> 
> [...]

Applied, thanks!

[12/15] clk: samsung: Add CPU clock support for Exynos850
        https://git.kernel.org/krzk/linux/c/61f4399c74d0677ee64e42f7b8d4ab01ee39de45

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>