linux-kernel - Re: [PATCH v3 6/6] clk: qcom: Add video clock controller driver for SC7180

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Message-ID: <8f744444-428c-56e2-2565-35b55f1e4aae@linaro.org>
Date:   Sun, 29 Dec 2019 19:33:14 +0200
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Taniya Das <tdas@...eaurora.org>, Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>, devicetree@...r.kernel.org,
        robh@...nel.org, robh+dt@...nel.org
Subject: Re: [PATCH v3 6/6] clk: qcom: Add video clock controller driver for
 SC7180

Hi Taniya,

On 12/27/19 8:38 AM, Taniya Das wrote:
> Add support for the video clock controller found on SC7180
> based devices. This would allow video drivers to probe
> and control their clocks.
> 
> Signed-off-by: Taniya Das <tdas@...eaurora.org>
> ---
>  drivers/clk/qcom/Kconfig          |   8 ++
>  drivers/clk/qcom/Makefile         |   1 +
>  drivers/clk/qcom/videocc-sc7180.c | 259 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 268 insertions(+)
>  create mode 100644 drivers/clk/qcom/videocc-sc7180.c
> 

<cut>

> +static const struct freq_tbl ftbl_video_cc_venus_clk_src[] = {
> +	F(19200000, P_BI_TCXO, 1, 0, 0),

Do you know is this frequency (19.2MHz) has real usage? The lower freq
I've seen for Venus was 75MHz.

> +	F(150000000, P_VIDEO_PLL0_OUT_MAIN, 4, 0, 0),
> +	F(270000000, P_VIDEO_PLL0_OUT_MAIN, 2.5, 0, 0),
> +	F(340000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
> +	F(434000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
> +	F(500000000, P_VIDEO_PLL0_OUT_MAIN, 2, 0, 0),
> +	{ }
> +};
> +
-- 
regards,
Stan