linux-kernel - Re: [RFC v1 02/11] clk: qcom: rcg2: Add support for flags

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Message-ID: <780fd0b4-fffc-5afb-e546-86ba75bad9f9@somainline.org>
Date:   Wed, 16 Jun 2021 17:33:05 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Robert Foss <robert.foss@...aro.org>, agross@...nel.org,
        bjorn.andersson@...aro.org, mturquette@...libre.com,
        sboyd@...nel.org, robh+dt@...nel.org, jonathan@...ek.ca,
        tdas@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Vinod Koul <vinod.koul@...aro.org>
Subject: Re: [RFC v1 02/11] clk: qcom: rcg2: Add support for flags


On 16.06.2021 16:10, Robert Foss wrote:
> These changes are ported from the downstream driver, and are used on SM8350
> for CAMCC, DISPCC, GCC, GPUCC & VIDEOCC.
>
> Signed-off-by: Robert Foss <robert.foss@...aro.org>
> ---
>  drivers/clk/qcom/clk-rcg.h  | 4 ++++
>  drivers/clk/qcom/clk-rcg2.c | 3 +++
>  2 files changed, 7 insertions(+)
>
> diff --git a/drivers/clk/qcom/clk-rcg.h b/drivers/clk/qcom/clk-rcg.h
> index 99efcc7f8d88..a1f05281d950 100644
> --- a/drivers/clk/qcom/clk-rcg.h
> +++ b/drivers/clk/qcom/clk-rcg.h
> @@ -149,6 +149,10 @@ struct clk_rcg2 {
>  	const struct freq_tbl	*freq_tbl;
>  	struct clk_regmap	clkr;
>  	u8			cfg_off;
> +	u8			flags;
> +#define FORCE_ENABLE_RCG	BIT(0)
> +#define HW_CLK_CTRL_MODE	BIT(1)
> +#define DFS_SUPPORT		BIT(2)
>  };
>  
>  #define to_clk_rcg2(_hw) container_of(to_clk_regmap(_hw), struct clk_rcg2, clkr)
> diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
> index 42f13a2d1cc1..ed2c9b6659cc 100644
> --- a/drivers/clk/qcom/clk-rcg2.c
> +++ b/drivers/clk/qcom/clk-rcg2.c
> @@ -295,6 +295,9 @@ static int __clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
>  	cfg |= rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
>  	if (rcg->mnd_width && f->n && (f->m != f->n))
>  		cfg |= CFG_MODE_DUAL_EDGE;
> +	if (rcg->flags & HW_CLK_CTRL_MODE)
> +		cfg |= CFG_HW_CLK_CTRL_MASK;
> +
>  	return regmap_update_bits(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg),
>  					mask, cfg);
>  }

What about code for handling other flags? If it's not a part of the series,

I don't think it makes sense to define them. Or perhaps you sent the

wrong revision?


Konrad