Hi Andrew
On 18-07-26 12:26 PM, Andrew Lunn wrote:
>> +static void mdio_mux_iproc_config_clk(struct iproc_mdiomux_desc *md)
>> +{
>> + u32 val;
>> + u32 divisor;
>> +
>> + if (md->core_clk) {
>> + divisor = clk_get_rate(md->core_clk) / MDIO_OPERATING_FREQUENCY;
>
> /**
> * clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
> * This is only valid once the clock source has been enabled.
> * @clk: clock source
> */
> unsigned long clk_get_rate(struct clk *clk);
>
> It is generally good practice to call clk_prepare_enable() sometime
> before clk_get_rate() to ensure the clock is ticking, and to show this
> driver is making use of the clock, so it does not get turned off.
Will add 'clk_prepare_enable()' to the probe.
Thanks
Arun
>
>> + divisor = divisor / (MDIO_RATE_ADJ_DIVIDENT + 1);
>> + val = divisor;
>> + val |= MDIO_RATE_ADJ_DIVIDENT << MDIO_RATE_ADJ_DIVIDENT_SHIFT;
>> + writel(val, md->base + MDIO_RATE_ADJ_EXT_OFFSET);
>> + writel(val, md->base + MDIO_RATE_ADJ_INT_OFFSET);
>> + }
>> +}
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