[U-Boot] [PATCH v6 15/20] tegra: fdt: Add function to return peripheral/clock ID

[Simon Glass]

Hi Stephen,

On Mon, Feb 27, 2012 at 3:41 PM, Stephen Warren <swarren at nvidia.com> wrote:
> On 02/27/2012 01:52 PM, Simon Glass wrote:
>> A common requirement is to find the clock ID for a peripheral. This is the
>> second cell of the 'clocks' property (the first being the phandle itself).
>
>> +int clock_decode_periph_id(const void *blob, int node)
>
>> +     valid = clock_periph_id_isvalid(id);
>
> clock_periph_id_isvalid() is not the correct function to use here; the
> code should be checking for invalid IDs in the CAR binding, not invalid
> IDs in the HW periph ID definition. They're different.
>
> Just to be explicit, the function you need here would be:
>
> int clkid_to_periphid(int clkid)
> {
>    if (clk_id > 95)
>        return -1;
>    switch (clk_id) {
>    case 1:
>    case 2:
>    case 7:
>    case 10:
>    case 20:
>    case 30:
>    case 35:
>    case 49:
>    case 56:
>    case 74:
>    case 77:
>    case 78:
>    case 79:
>    case 80:
>    case 81:
>    case 82:
>    case 83:
>    case 91:
>    case 95:
>        return -1;
>    default:
>        return clkid;
>    }
> }

Ick.

Why is 7 in there, and did you miss 76? Also U-Boot only goes up to 88
at present so should I change the first test to match?

Regards,
Simon

>
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