linux-kernel - Re: [PATCH v5 2/5] i2c: core: add api to provide frequency mode strings

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Date:   Wed, 31 Mar 2021 21:03:30 +0800
From:   Yicong Yang <yangyicong@...ilicon.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>, <wsa@...nel.org>,
        <andriy.shevchenko@...ux.intel.com>, <linux-i2c@...r.kernel.org>,
        <Sergey.Semin@...kalelectronics.ru>, <linux-kernel@...r.kernel.org>
CC:     <digetx@...il.com>, <treding@...dia.com>,
        <rmk+kernel@...linux.org.uk>, <song.bao.hua@...ilicon.com>,
        <john.garry@...wei.com>, <mika.westerberg@...ux.intel.com>,
        <prime.zeng@...wei.com>, <linuxarm@...wei.com>
Subject: Re: [PATCH v5 2/5] i2c: core: add api to provide frequency mode
 strings

On 2021/3/31 16:35, Jarkko Nikula wrote:
> Hi
> 
> On 3/30/21 5:19 PM, Yicong Yang wrote:
>> Some I2C drivers like Designware and HiSilicon will print the
>> bus frequency mode information, so add a public one that everyone
>> can make use of.
>>
>> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>> Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
>> ---
>>   include/linux/i2c.h | 20 ++++++++++++++++++++
>>   1 file changed, 20 insertions(+)
>>
>> diff --git a/include/linux/i2c.h b/include/linux/i2c.h
>> index 10bd0b0..6837e64 100644
>> --- a/include/linux/i2c.h
>> +++ b/include/linux/i2c.h
>> @@ -47,6 +47,26 @@ typedef int (*i2c_slave_cb_t)(struct i2c_client *client,
>>   #define I2C_MAX_HIGH_SPEED_MODE_FREQ    3400000
>>   #define I2C_MAX_ULTRA_FAST_MODE_FREQ    5000000
>>   +static inline const char *i2c_freq_mode_string(u32 bus_freq_hz)
>> +{
>> +    switch (bus_freq_hz) {
>> +    case I2C_MAX_STANDARD_MODE_FREQ:
>> +        return "Standard Mode(100KHz)";
>> +    case I2C_MAX_FAST_MODE_FREQ:
>> +        return "Fast Mode(400KHz)";
>> +    case I2C_MAX_FAST_MODE_PLUS_FREQ:
>> +        return "Fast Mode Plus(1.0MHz)";
>> +    case I2C_MAX_TURBO_MODE_FREQ:
>> +        return "Turbo Mode(1.4MHz)";
>> +    case I2C_MAX_HIGH_SPEED_MODE_FREQ:
>> +        return "High Speed Mode(3.4MHz)";
>> +    case I2C_MAX_ULTRA_FAST_MODE_FREQ:
>> +        return "Ultra Fast Mode(5.0MHz)";
>> +    default:
>> +        return "Unknown Mode";
>> +    }
> 
> A few minor nits here:
> - KHz -> kHz
> - Space between text and opening parenthesis: "Mode(" -> "Mode ("
> - Space between number and unit: (1.0MHz) -> (1.0 MHz)

will address. thanks!

> 
> With those changes you may add my
> 
> Reviewed-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
> Tested-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
> .