# Re: \[PATCH 3/3\] pinctrl: meson: add pinctrl driver support for Meson-S4 Soc

- From: qianggui.song \<hidden\>
- Date: 2021-12-17 09:24:09 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/12/8815816
- Thread: https://ratatoskr.run/linux-arm-kernel/2021/12/1607554/t.md

```text
Hi, jerome

On 2021/12/16 下午5:20, Jerome Brunet wrote:
>
>
> On Thu 16 Dec 2021 at 14:07, qianggui.song [ref] wrote:
>
>>>> +static const unsigned int clk12_24_pins[]		= { GPIOD_10 };
>>>> +static const unsigned int pwm_g_hiz_pins[]		= { GPIOD_11 };
>>>> +
>>> [...]
>>>
>>>> +
>>>> +static const char * const tdm_groups[] = {
>>>> +	"tdm_d2_c", "tdm_d3_c", "tdm_fs1_c", "tdm_d4_c", "tdm_d5_c",
>>>> +	"tdm_fs1_d", "tdm_d4_d", "tdm_d3_d", "tdm_d2_d", "tdm_sclk1_d",
>>>> +	"tdm_sclk1_h", "tdm_fs1_h", "tdm_d2_h", "tdm_d3_h", "tdm_d4_h",
>>>> +	"tdm_d1", "tdm_d0", "tdm_fs0", "tdm_sclk0", "tdm_fs2", "tdm_sclk2",
>>>> +	"tdm_d4_z", "tdm_d5_z", "tdm_d6", "tdm_d7"
>>>> +};
>>> On previous chip, there were pin assigned to tdm A, B or C.
>>> On this generation, it seems you have added a second level on pinmuxing
>>> to re-route the audio pins to different controllers
>>> In such case, I don't think they belong in the same group.
>>> Depending on settins, D2 and D3 could be unrelated
>>> I think each audio pin should have its own group (one group for D3, one
>>> D4, etc ...)
>>>
>> According to our audio colleague, on this chip, tdm A/B/C can choose which
>> pins are routed to their controllers freely by writing special registers,
>> say, tdm_d2_c can be assigned to any of tdm a, b and c by demand, so no
>> need to specify a/b/c words any more.
>
> That's basically my comment above. Comment still stands
> Each D and FS pin could be related to different interface and should be
> in different groups
>
>
>
So I guess below should match above comment, correct me if I’m wrong

static const char * const tdm_d0_groups {
      ...
};
 ...

static const char * const tdm_d7_groups {
      ...
};

static const char * const tdm_fs0_groups {
     ...
};

static const char * const tdm_fs2_groups {
     ...
};

static const char * const tdm_sclk0_groups {
     ...
};
    ...
static const char * const tdm_sclk2_groups {
     ...
};




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