linux-kernel - Re: [PATCH] clk: qcom: clk-alpha-pll: fix alpha mode configuration

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Message-ID: <5f39a93197f02fa7ec0de897a7ce646d.sboyd@kernel.org>
Date: Mon, 21 Oct 2024 11:14:44 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>, Gabor Juhos <j4g8y7@...il.com>, Michael Turquette <mturquette@...libre.com>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org, stable@...r.kernel.org, Gabor Juhos <j4g8y7@...il.com>
Subject: Re: [PATCH] clk: qcom: clk-alpha-pll: fix alpha mode configuration

Quoting Gabor Juhos (2024-10-21 10:32:48)
> Commit c45ae598fc16 ("clk: qcom: support for alpha mode configuration")
> added support for configuring alpha mode, but it seems that the feature
> was never working in practice.
> 
[...]
> 
> Applying the 'alpha_en_mask' fixes the initial rate of the PLLs showed
> in the table above. Since the 'alpha_mode_mask' is not used by any driver
> currently, that part of the change causes no functional changes.
> 
> Cc: stable@...r.kernel.org
> Fixes: c45ae598fc16 ("clk: qcom: support for alpha mode configuration")
> Signed-off-by: Gabor Juhos <j4g8y7@...il.com>
> ---
> diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
> index f9105443d7dbb104e3cb091e59f43df25999f8b3..03cc7aa092480bfdd9eaa986d44f0545944b3b89 100644
> --- a/drivers/clk/qcom/clk-alpha-pll.c
> +++ b/drivers/clk/qcom/clk-alpha-pll.c
> @@ -421,6 +421,8 @@ void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
>         mask |= config->pre_div_mask;
>         mask |= config->post_div_mask;
>         mask |= config->vco_mask;
> +       mask |= config->alpha_en_mask;
> +       mask |= config->alpha_mode_mask;
>  

This is https://lore.kernel.org/all/20241019-qcs615-mm-clockcontroller-v1-1-4cfb96d779ae@quicinc.com/