linux-kernel - Re: [PATCH 4.12 55/65] pinctrl: sunxi: add a missing function of A10/A20 pinctrl driver

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Message-ID: <CAGb2v67tTea5aQMtH9_mUiUqjnsDBWVdvi7uao1yTxpn8=z0pQ@mail.gmail.com>
Date:   Tue, 22 Aug 2017 17:11:30 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Ben Hutchings <ben@...adent.org.uk>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org, Icenowy Zheng <icenowy@...c.io>,
        Chen-Yu Tsai <wens@...e.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 4.12 55/65] pinctrl: sunxi: add a missing function of
 A10/A20 pinctrl driver

On Sat, Aug 19, 2017 at 4:07 AM, Ben Hutchings <ben@...adent.org.uk> wrote:
> On Mon, 2017-08-14 at 18:19 -0700, Greg Kroah-Hartman wrote:
>> 4.12-stable review patch.  If anyone has any objections, please let me know.
>>
>> ------------------
>>
>> From: Icenowy Zheng <icenowy@...c.io>
>>
>> commit d81ece747d8727bb8b1cfc9a20dbe62f09a4e35a upstream.
>>
>> The PH16 pin has a function with mux id 0x5, which is the DET pin of the
>> "sim" (smart card reader) IP block.
>>
>> This function is missing in old versions of A10/A20 SoCs' datasheets and
>> user manuals, so it's also missing in the old drivers. The newest A10
>> Datasheet V1.70 and A20 Datasheet V1.41 contain this pin function, and
>> it's discovered during implementing R40 pinctrl driver.
>>
>> Add it to the driver. As we now merged A20 pinctrl driver to the A10
>> one, we need to only fix the A10 driver now.
>
> That happened after 4.12, so I think for stable the same change should
> be applied in drivers/pinctrl/sunxi/pinctrl-sun7i-a20.c.

Indeed. Should we send a backported patch?

Thanks
ChenYu

>
> Ben.
>
>> Fixes: f2821b1ca3a2 ("pinctrl: sunxi: Move Allwinner A10 pinctrl
>> driver to a driver of its own")
>>
>> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
>> Reviewed-by: Chen-Yu Tsai <wens@...e.org>
>> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
>> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>>
>> ---
>>  drivers/pinctrl/sunxi/pinctrl-sun4i-a10.c |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> --- a/drivers/pinctrl/sunxi/pinctrl-sun4i-a10.c
>> +++ b/drivers/pinctrl/sunxi/pinctrl-sun4i-a10.c
>> @@ -811,6 +811,7 @@ static const struct sunxi_desc_pin sun4i
>>                 SUNXI_FUNCTION(0x2, "lcd1"),          /* D16 */
>>                 SUNXI_FUNCTION(0x3, "pata"),          /* ATAD12 */
>>                 SUNXI_FUNCTION(0x4, "keypad"),        /* IN6 */
>> +               SUNXI_FUNCTION(0x5, "sim"),           /* DET */
>>                 SUNXI_FUNCTION_IRQ(0x6, 16),          /* EINT16 */
>>                 SUNXI_FUNCTION(0x7, "csi1")),         /* D16 */
>>       SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 17),
>>
>>
> --
> Ben Hutchings
> Reality is just a crutch for people who can't handle science fiction.
>