linux-kernel - Re: [PATCH 06/13] usb: xhci-mtk: support ip-sleep wakeup for MT8183

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Date:   Tue, 23 Mar 2021 10:39:07 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Sergei Shtylyov <sergei.shtylyov@...il.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Eddie Hung <eddie.hung@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>
Subject: Re: [PATCH 06/13] usb: xhci-mtk: support ip-sleep wakeup for MT8183

On Mon, 2021-03-22 at 11:54 +0300, Sergei Shtylyov wrote:
> Hello!
> 
> On 22.03.2021 6:13, Chunfeng Yun wrote:
> 
> > Add support ip-sleep wakeup for MT8183, it's similar to MT8173,
>               ^ for
> 
> > and it's also a specific one, but not follow IPM rule.
> 
>     Following?
Ack
> 
> > Due to the index 2 already used by many DTS, it's better to keep
> > it unchanged for backward compatible, treat specific ones without
> 
>     Compatibility.
Ack
> 
> > following IPM rule as revision 1.x, meanwhile reserve 3~10 for
> > later revision that follows the IPM rule.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >   drivers/usb/host/xhci-mtk.c | 13 +++++++++++++
> >   1 file changed, 13 insertions(+)
> > 
> > diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
> > index 09f2ddbfe8b9..8ba1f914cb75 100644
> > --- a/drivers/usb/host/xhci-mtk.c
> > +++ b/drivers/usb/host/xhci-mtk.c
> > @@ -57,12 +57,19 @@
> >   #define CTRL_U2_FORCE_PLL_STB	BIT(28)
> >   
> >   /* usb remote wakeup registers in syscon */
> > +
> >   /* mt8173 etc */
> >   #define PERI_WK_CTRL1	0x4
> >   #define WC1_IS_C(x)	(((x) & 0xf) << 26)  /* cycle debounce */
> >   #define WC1_IS_EN	BIT(25)
> >   #define WC1_IS_P	BIT(6)  /* polarity for ip sleep */
> >   
> > +/* mt8183 */
> > +#define PERI_WK_CTRL0	0x0
> > +#define WC0_IS_C(x)	(((x) & 0xf) << 28)  /* cycle debounce */
> > +#define WC0_IS_P	BIT(12)	/* polarity */
> > +#define WC0_IS_EN	BIT(6)
> > +
> >   /* mt2712 etc */
> >   #define PERI_SSUSB_SPM_CTRL	0x0
> >   #define SSC_IP_SLEEP_EN	BIT(4)
> > @@ -71,6 +78,7 @@
> >   enum ssusb_uwk_vers {
> >   	SSUSB_UWK_V1 = 1,
> >   	SSUSB_UWK_V2,
> > +	SSUSB_UWK_V11 = 11,	/* specific revision 1.1 */
> 
>     SSUSB_UWK_V1_1, maybe?
Good point, will modify it.

Thanks a lot

> 
> [...]
> 
> MBR, Sergei