On Tue, Mar 30, 2021 at 09:05:47PM +0800, 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.
FWIW,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Signed-off-by: Yicong Yang <yangyicong@xxxxxxxxxxxxx>
> ---
> 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";
> + }
> +}
> +
> struct module;
> struct property_entry;
>
> --
> 2.8.1
>
--
With Best Regards,
Andy Shevchenko
