[RFC PATCH 2/2] i2c: at91: provide bus_freq_hz

[Ludovic Desroches]

On Mon, Mar 26, 2018 at 02:19:27PM +0300, Tudor Ambarus wrote:
> The clock-frequency property is not mandatory for the i2c buses. If it's
> not present in device tree, the buses usually assume that is 100kHZ.
> There are i2c clients that need to know the clock frequency in order to
> compute their wake token. Spare the clients of making (wrong) assumptions
> and provide the bus frequency in adapter.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus at microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches at microchip.com>

> ---
>  drivers/i2c/busses/i2c-at91.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
> index bfd1fdf..d3cd84e 100644
> --- a/drivers/i2c/busses/i2c-at91.c
> +++ b/drivers/i2c/busses/i2c-at91.c
> @@ -1116,6 +1116,7 @@ static int at91_twi_probe(struct platform_device *pdev)
>  	dev->adapter.quirks = &at91_twi_quirks;
>  	dev->adapter.dev.parent = dev->dev;
>  	dev->adapter.nr = pdev->id;
> +	dev->adapter.bus_freq_hz = bus_clk_rate;
>  	dev->adapter.timeout = AT91_I2C_TIMEOUT;
>  	dev->adapter.dev.of_node = pdev->dev.of_node;
>  
> -- 
> 2.9.4
>