linux-kernel - Re: [PATCH 2/2] reset: uniphier: add SATA reset control support and change SATA-PHY ID

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Date:   Tue, 3 Apr 2018 17:35:30 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>
Cc:     Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] reset: uniphier: add SATA reset control support and
 change SATA-PHY ID

2018-04-03 17:18 GMT+09:00 Philipp Zabel <p.zabel@...gutronix.de>:
> On Fri, 2018-03-30 at 18:44 +0900, Kunihiko Hayashi wrote:
>> Add reset lines for SATA controller on UniPhier SoCs.
>> This adds support for Pro4 and PXs3 in addition to PXs2.
>>
>> And this changes the ID of the reset line for SATA-PHY on PXs2.
>> Since some SoCs have two controller instances with a common PHY, this moves
>> the ID of SATA-PHY for consistency.
>>
>> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
>> ---
>>  drivers/reset/reset-uniphier.c | 8 +++++++-
>>  1 file changed, 7 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/reset/reset-uniphier.c b/drivers/reset/reset-uniphier.c
>> index 55ae0f1..90e6caf 100644
>> --- a/drivers/reset/reset-uniphier.c
>> +++ b/drivers/reset/reset-uniphier.c
>> @@ -63,6 +63,9 @@ static const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = {
>>       UNIPHIER_RESETX(12, 0x2000, 6),         /* GIO (Ether, SATA, USB3) */
>>       UNIPHIER_RESETX(14, 0x2000, 17),        /* USB30 */
>>       UNIPHIER_RESETX(15, 0x2004, 17),        /* USB31 */
>> +     UNIPHIER_RESETX(28, 0x2000, 18),        /* SATA0 */
>> +     UNIPHIER_RESETX(29, 0x2004, 18),        /* SATA1 */
>> +     UNIPHIER_RESETX(30, 0x2000, 19),        /* SATA-PHY */
>>       UNIPHIER_RESETX(40, 0x2000, 13),        /* AIO */
>>       UNIPHIER_RESET_END,
>>  };
>> @@ -90,7 +93,7 @@ static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = {
>>       UNIPHIER_RESETX(20, 0x2014, 5),         /* USB31-PHY0 */
>>       UNIPHIER_RESETX(21, 0x2014, 1),         /* USB31-PHY1 */
>>       UNIPHIER_RESETX(28, 0x2014, 12),        /* SATA */
>> -     UNIPHIER_RESET(29, 0x2014, 8),          /* SATA-PHY (active high) */
>> +     UNIPHIER_RESET(30, 0x2014, 8),          /* SATA-PHY (active high) */
>
> This is a backwards incompatible change.
> There is no DT in use that relies on this being 29 ?


Right.  No user for this reset line ever.



-- 
Best Regards
Masahiro Yamada