linux-kernel - Re: [PATCH v4 3/8] clk: loongson2: Support scale clocks with an alternative mode

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Message-ID: <175848424324.4354.14718670578549381149@lazor>
Date: Sun, 21 Sep 2025 12:50:43 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Conor Dooley <conor+dt@...nel.org>, Huacai Chen <chenhuacai@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Michael Turquette <mturquette@...libre.com>, Rob Herring <robh@...nel.org>, WANG Xuerui <kernel@...0n.name>, Yao Zi <ziyao@...root.org>, Yinbo Zhu <zhuyinbo@...ngson.cn>
Cc: linux-clk@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev, Mingcong Bai <jeffbai@...c.io>, Kexy Biscuit <kexybiscuit@...c.io>, Yao Zi <ziyao@...root.org>
Subject: Re: [PATCH v4 3/8] clk: loongson2: Support scale clocks with an alternative mode

Quoting Yao Zi (2025-09-19 07:26:44)
> LS2K0300 and LS2K1500 ship scale clocks with an alternative mode.
> There's one mode bit in clock configuration register indicating the
> operation mode.
> 
> When mode bit is unset, the scale clock acts the same as previous
> generation of scale clocks. When it's set, a different equation for
> calculating result frequency, Fout = Fin / (scale + 1), is used.
> 
> This patch adds frequency calculation support for the scale clock
> variant. A helper macro, CLK_SCALE_MODE, is added to simplify
> definitions.
> 
> Signed-off-by: Yao Zi <ziyao@...root.org>
> ---

Applied to clk-next