linux-kernel - Re: [PATCH v2 1/1] i2c: drivers: Use generic definitions for bus frequencies (part 2)

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Date:   Wed, 31 Mar 2021 16:09:53 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Wolfram Sang <wsa@...nel.org>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Khalil Blaiech <kblaiech@...dia.com>,
        Loic Poulain <loic.poulain@...aro.org>,
        linux-i2c@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>
Subject: Re: [PATCH v2 1/1] i2c: drivers: Use generic definitions for bus
 frequencies (part 2)

Hey Andy,

This patch looks good to me.

Reviewed-by: Robert Foss <robert.foss@...aro.org>

On Wed, 31 Mar 2021 at 12:46, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> Since we have generic definitions for bus frequencies, let's use them.
>
> Cc: Wolfram Sang <wsa@...-dreams.de>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Acked-by: Khalil Blaiech <kblaiech@...dia.com>
> ---
> v2: added tag (Khalil), converted one missed place in DesignWare driver
>  drivers/i2c/busses/i2c-designware-master.c |  2 +-
>  drivers/i2c/busses/i2c-mlxbf.c             | 14 ++++----------
>  drivers/i2c/busses/i2c-qcom-cci.c          |  4 ++--
>  3 files changed, 7 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
> index dd27b9dbe931..3f4d2124e0fc 100644
> --- a/drivers/i2c/busses/i2c-designware-master.c
> +++ b/drivers/i2c/busses/i2c-designware-master.c
> @@ -78,7 +78,7 @@ static int i2c_dw_set_timings_master(struct dw_i2c_dev *dev)
>          * difference is the timing parameter values since the registers are
>          * the same.
>          */
> -       if (t->bus_freq_hz == 1000000) {
> +       if (t->bus_freq_hz == I2C_MAX_FAST_MODE_PLUS_FREQ) {
>                 /*
>                  * Check are Fast Mode Plus parameters available. Calculate
>                  * SCL timing parameters for Fast Mode Plus if not set.
> diff --git a/drivers/i2c/busses/i2c-mlxbf.c b/drivers/i2c/busses/i2c-mlxbf.c
> index 2fb0532d8a16..80ab831df349 100644
> --- a/drivers/i2c/busses/i2c-mlxbf.c
> +++ b/drivers/i2c/busses/i2c-mlxbf.c
> @@ -172,12 +172,6 @@
>  #define MLXBF_I2C_SMBUS_THIGH_MAX_TBUF            0x14
>  #define MLXBF_I2C_SMBUS_SCL_LOW_TIMEOUT           0x18
>
> -enum {
> -       MLXBF_I2C_TIMING_100KHZ = 100000,
> -       MLXBF_I2C_TIMING_400KHZ = 400000,
> -       MLXBF_I2C_TIMING_1000KHZ = 1000000,
> -};
> -
>  /*
>   * Defines SMBus operating frequency and core clock frequency.
>   * According to ADB files, default values are compliant to 100KHz SMBus
> @@ -1202,7 +1196,7 @@ static int mlxbf_i2c_init_timings(struct platform_device *pdev,
>
>         ret = device_property_read_u32(dev, "clock-frequency", &config_khz);
>         if (ret < 0)
> -               config_khz = MLXBF_I2C_TIMING_100KHZ;
> +               config_khz = I2C_MAX_STANDARD_MODE_FREQ;
>
>         switch (config_khz) {
>         default:
> @@ -1210,15 +1204,15 @@ static int mlxbf_i2c_init_timings(struct platform_device *pdev,
>                 pr_warn("Illegal value %d: defaulting to 100 KHz\n",
>                         config_khz);
>                 fallthrough;
> -       case MLXBF_I2C_TIMING_100KHZ:
> +       case I2C_MAX_STANDARD_MODE_FREQ:
>                 config_idx = MLXBF_I2C_TIMING_CONFIG_100KHZ;
>                 break;
>
> -       case MLXBF_I2C_TIMING_400KHZ:
> +       case I2C_MAX_FAST_MODE_FREQ:
>                 config_idx = MLXBF_I2C_TIMING_CONFIG_400KHZ;
>                 break;
>
> -       case MLXBF_I2C_TIMING_1000KHZ:
> +       case I2C_MAX_FAST_MODE_PLUS_FREQ:
>                 config_idx = MLXBF_I2C_TIMING_CONFIG_1000KHZ;
>                 break;
>         }
> diff --git a/drivers/i2c/busses/i2c-qcom-cci.c b/drivers/i2c/busses/i2c-qcom-cci.c
> index 1c259b5188de..c63d5545fc2a 100644
> --- a/drivers/i2c/busses/i2c-qcom-cci.c
> +++ b/drivers/i2c/busses/i2c-qcom-cci.c
> @@ -569,9 +569,9 @@ static int cci_probe(struct platform_device *pdev)
>                 cci->master[idx].mode = I2C_MODE_STANDARD;
>                 ret = of_property_read_u32(child, "clock-frequency", &val);
>                 if (!ret) {
> -                       if (val == 400000)
> +                       if (val == I2C_MAX_FAST_MODE_FREQ)
>                                 cci->master[idx].mode = I2C_MODE_FAST;
> -                       else if (val == 1000000)
> +                       else if (val == I2C_MAX_FAST_MODE_PLUS_FREQ)
>                                 cci->master[idx].mode = I2C_MODE_FAST_PLUS;
>                 }
>
> --
> 2.30.2
>