[PATCH 07/16] reset: rzg2l-usbphy-ctrl: Get reset control array

[claudiu beznea]

Hi, Biju,

On 23.08.2024 10:25, Biju Das wrote:
> Hi Claudiu,
> 
>> -----Original Message-----
>> From: Claudiu <claudiu.beznea at tuxon.dev>
>> Sent: Thursday, August 22, 2024 4:28 PM
>> Subject: [PATCH 07/16] reset: rzg2l-usbphy-ctrl: Get reset control array
>>
>> From: Claudiu Beznea <claudiu.beznea.uj at bp.renesas.com>
>>
>> Before accessing the USB area of the RZ/G3S SoC the PWRRDY bit of the SYS_USB_PWRRDY register need to
>> be cleared. When USB area is not used the PWRRDY bit of the SYS_USB_PWRRDY register need to be set.
>> This register is in the SYSC controller address space and the assert/de-assert of the signal handled
>> by SYSC_USB_PWRRDY was implemented as a reset signal.
>>
>> The USB modules available on the RZ/G3S SoC that need this bit set are:
>> - USB ch0 (supporting host and peripheral mode)
>> - USB ch2 (supporting host mode)
>> - USBPHY control
>>
>> As the USBPHY control is the root device for all the other USB channels (USB ch0, USB ch1) add support
>> to set the PWRRDY for the USB area when initializing the USBPHY control. As this is done though reset
>> signals get the reset array in the USBPHY control driver.
>>
> 
> Comment applicable, if the USB PWRRDY signal is modelled as reset signal.
> 
> There is no user for this patch. The first user is RZ/G3S and is there is no support yet.
> I think you should merge this patch with next one so that there is a user(RZ/G3S)
> for this patch.

I have nothing against to squash it. I was seeing it differently:
- this patch prepares the ground for the addition of RZ/G3S
- the next patch just enables the support for RZ/G3S

It looks to me more modular like this, patches are simpler, easier for
review and each issue is described differently in patch description.

I can do it either ways.


Thank you,
Claudiu Beznea


> Cheers,
> Biju
> 
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj at bp.renesas.com>
>> ---
>>  drivers/reset/reset-rzg2l-usbphy-ctrl.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
>> index 1cd157f4f03b..8b64c12f3bec 100644
>> --- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c
>> +++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
>> @@ -132,7 +132,7 @@ static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
>>  	if (IS_ERR(regmap))
>>  		return PTR_ERR(regmap);
>>
>> -	priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
>> +	priv->rstc = devm_reset_control_array_get_exclusive(&pdev->dev);
>>  	if (IS_ERR(priv->rstc))
>>  		return dev_err_probe(dev, PTR_ERR(priv->rstc),
>>  				     "failed to get reset\n");
>> --
>> 2.39.2
>