From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5A972C43441 for ; Thu, 29 Nov 2018 06:26:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2A8B620863 for ; Thu, 29 Nov 2018 06:26:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2A8B620863 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727806AbeK2Ram (ORCPT ); Thu, 29 Nov 2018 12:30:42 -0500 Received: from Mailgw01.mediatek.com ([1.203.163.78]:42067 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727643AbeK2Ram (ORCPT ); Thu, 29 Nov 2018 12:30:42 -0500 X-UUID: a910dc311edc44da9374e8aa4e1753cc-20181129 X-UUID: a910dc311edc44da9374e8aa4e1753cc-20181129 Received: from mtkcas34.mediatek.inc [(172.27.4.250)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 64181748; Thu, 29 Nov 2018 14:26:16 +0800 Received: from MTKCAS32.mediatek.inc (172.27.4.184) by MTKMBS32N2.mediatek.inc (172.27.4.72) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 29 Nov 2018 14:26:15 +0800 Received: from [10.17.3.153] (10.17.3.153) by MTKCAS32.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 29 Nov 2018 14:26:15 +0800 Message-ID: <1543472774.32173.114.camel@mhfsdcap03> Subject: Re: [PATCH v4] usb/mtu3: power down device ip at setup From: Chunfeng Yun To: "Hsin-Yi, Wang" CC: , Greg Kroah-Hartman , , , Date: Thu, 29 Nov 2018 14:26:14 +0800 In-Reply-To: <20181129031627.45006-1-hsinyi@chromium.org> References: <20181128095358.42498-1-hsinyi@chromium.org> <20181129031627.45006-1-hsinyi@chromium.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hi Hsin-Yi, On Thu, 2018-11-29 at 11:16 +0800, Hsin-Yi, Wang wrote: > Originally, when dr_mode is USB_DR_MODE_HOST, it didn't power down device ip, > so host ip sleep will fail at ssusb_host_disable. > > Power down device ip at ssusb_host_setup. > > Signed-off-by: Hsin-Yi, Wang > --- > ChangeLog: > V3->V4: > *update comment > --- > drivers/usb/mtu3/mtu3_plat.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c > index 46551f6d16fd..e086630e41a9 100644 > --- a/drivers/usb/mtu3/mtu3_plat.c > +++ b/drivers/usb/mtu3/mtu3_plat.c > @@ -200,6 +200,14 @@ static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb) > mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); > udelay(1); > mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); > + > + /* > + * device ip may be powered on in firmware/BROM stage before entering > + * kernel stage; > + * power down device ip, otherwise ip-sleep will fail when working as > + * host only mode > + */ > + mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); > } > > /* ignore the error if the clock does not exist */ Acked-by: Chunfeng Yun Thanks a lot