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

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Date:   Tue, 03 Apr 2018 10:18:26 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] reset: uniphier: add SATA reset control support and
 change SATA-PHY ID

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 ?

regards
Philipp