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Tue, 12 Feb 2019 07:41:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=FpL2EdLrUZcH6pUDOqkoOKqgaq6l5VORjkNC53ZTYuM=; b=kOsxmxeqGLFFFdhAsRQQ9ohqZegwOMrq3TQLK0+xGa3sAt3DvlBblmnfZU+8iWkRFHokVBieAoC/KdDPgogaroJr3mGuhPydCQa8iuPPXnhqOu213ga54suaM0PC9SSpZNIQ72CEZT7sicvTb9nbav+n7+iId7yp2pYNlmYEs7c= Received: from DB3PR0402MB3916.eurprd04.prod.outlook.com (52.134.72.18) by DB3PR0402MB3659.eurprd04.prod.outlook.com (52.134.66.160) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1601.21; Tue, 12 Feb 2019 12:40:25 +0000 Received: from DB3PR0402MB3916.eurprd04.prod.outlook.com ([fe80::14e8:6d2e:fe21:4fd5]) by DB3PR0402MB3916.eurprd04.prod.outlook.com ([fe80::14e8:6d2e:fe21:4fd5%3]) with mapi id 15.20.1601.023; Tue, 12 Feb 2019 12:40:25 +0000 From: Anson Huang To: "jassisinghbrar@gmail.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" CC: dl-linux-imx Subject: [PATCH] mailbox: imx: keep MU irq working during suspend/resume Thread-Topic: [PATCH] mailbox: imx: keep MU irq working during suspend/resume Thread-Index: AQHUwtAg/pNADKFPLk+9n0uazrY7lA== Date: Tue, 12 Feb 2019 12:40:25 +0000 Message-ID: <1549974905-12116-1-git-send-email-Anson.Huang@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.7.4 x-clientproxiedby: HK2PR02CA0180.apcprd02.prod.outlook.com (2603:1096:201:21::16) To DB3PR0402MB3916.eurprd04.prod.outlook.com (2603:10a6:8:10::18) authentication-results: spf=none (sender IP is ) smtp.mailfrom=anson.huang@nxp.com; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: f03dba34-f5cf-4840-8d2b-08d690e742d7 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Feb 2019 12:40:22.2900 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0402MB3659 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org During noirq suspend phase, mailbox MU irq will be masked but many drivers still need to communicate with system controller firmware via mailbox, if MU irq is masked, it will cause RPC timeout as below: [ 23.372103] imx-scu scu: RPC send msg timeout Setting MU irq to be wakeup source is NOT working as GIC driver does NOT have .irq_set_wake implemented, so to support suspend/resume, just make imx mailbox driver NOT suspend, since MU is always a wakeup source on i.MX platforms with system controller inside, and its power/clock is maintained by system controller, mailbox driver no need to manage them. Signed-off-by: Anson Huang --- drivers/mailbox/imx-mailbox.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c index 774362a..85fc5b5 100644 --- a/drivers/mailbox/imx-mailbox.c +++ b/drivers/mailbox/imx-mailbox.c @@ -187,8 +187,8 @@ static int imx_mu_startup(struct mbox_chan *chan) return 0; } =20 - ret =3D request_irq(priv->irq, imx_mu_isr, IRQF_SHARED, cp->irq_desc, - chan); + ret =3D request_irq(priv->irq, imx_mu_isr, IRQF_SHARED | + IRQF_NO_SUSPEND, cp->irq_desc, chan); if (ret) { dev_err(priv->dev, "Unable to acquire IRQ %d\n", priv->irq); --=20 2.7.4