linux-kernel - Re: [RFC PATCH 10/14] i2c: qcom-cci: add msm8974 compatible

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Date:   Wed, 15 Jun 2022 19:11:25 +0200
From:   Loic Poulain <loic.poulain@...aro.org>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     linux-arm-msm@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Robert Foss <robert.foss@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Todor Tomov <todor.too@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        matti.lehtimaki@...il.com
Subject: Re: [RFC PATCH 10/14] i2c: qcom-cci: add msm8974 compatible

On Sun, 22 May 2022 at 18:28, Luca Weiss <luca@...tu.xyz> wrote:
>
> From: Matti Lehtimäki <matti.lehtimaki@...il.com>
>
> MSM8974 CCI is the same as MSM8916 except it has two masters.
>
> Signed-off-by: Matti Lehtimäki <matti.lehtimaki@...il.com>
> Signed-off-by: Luca Weiss <luca@...tu.xyz>

Reviewed-by: Loic Poulain <loic.poulain@...aro.org>

> ---
> To note, the cci_v1_5_data variable name is just a bit arbitrary and
> isn't meant to reflect IP version "1.5". I'd be happy to change the
> variable name to something else.
>
>  drivers/i2c/busses/i2c-qcom-cci.c | 35 +++++++++++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>
> diff --git a/drivers/i2c/busses/i2c-qcom-cci.c b/drivers/i2c/busses/i2c-qcom-cci.c
> index 5c7cc862f08f..a68f17eb9dd0 100644
> --- a/drivers/i2c/busses/i2c-qcom-cci.c
> +++ b/drivers/i2c/busses/i2c-qcom-cci.c
> @@ -725,6 +725,40 @@ static const struct cci_data cci_v1_data = {
>         },
>  };
>
> +static const struct cci_data cci_v1_5_data = {
> +       .num_masters = 2,
> +       .queue_size = { 64, 16 },
> +       .quirks = {
> +               .max_write_len = 10,
> +               .max_read_len = 12,
> +       },
> +       .cci_clk_rate =  19200000,
> +       .params[I2C_MODE_STANDARD] = {
> +               .thigh = 78,
> +               .tlow = 114,
> +               .tsu_sto = 28,
> +               .tsu_sta = 28,
> +               .thd_dat = 10,
> +               .thd_sta = 77,
> +               .tbuf = 118,
> +               .scl_stretch_en = 0,
> +               .trdhld = 6,
> +               .tsp = 1
> +       },
> +       .params[I2C_MODE_FAST] = {
> +               .thigh = 20,
> +               .tlow = 28,
> +               .tsu_sto = 21,
> +               .tsu_sta = 21,
> +               .thd_dat = 13,
> +               .thd_sta = 18,
> +               .tbuf = 32,
> +               .scl_stretch_en = 0,
> +               .trdhld = 6,
> +               .tsp = 3
> +       },
> +};
> +
>  static const struct cci_data cci_v2_data = {
>         .num_masters = 2,
>         .queue_size = { 64, 16 },
> @@ -773,6 +807,7 @@ static const struct cci_data cci_v2_data = {
>
>  static const struct of_device_id cci_dt_match[] = {
>         { .compatible = "qcom,msm8916-cci", .data = &cci_v1_data},
> +       { .compatible = "qcom,msm8974-cci", .data = &cci_v1_5_data},
>         { .compatible = "qcom,msm8996-cci", .data = &cci_v2_data},
>         { .compatible = "qcom,sdm845-cci", .data = &cci_v2_data},
>         { .compatible = "qcom,sm8250-cci", .data = &cci_v2_data},
> --
> 2.36.0
>