From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Guo Subject: Re: [PATCH V7 2/4] firmware: imx: enable imx scu general irq function Date: Thu, 11 Apr 2019 15:32:53 +0800 Message-ID: <20190411073252.GC3050@dragon> References: <1554785675-8090-1-git-send-email-Anson.Huang@nxp.com> <1554785675-8090-2-git-send-email-Anson.Huang@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1554785675-8090-2-git-send-email-Anson.Huang@nxp.com> Sender: linux-kernel-owner@vger.kernel.org To: Anson Huang Cc: "robh+dt@kernel.org" , "mark.rutland@arm.com" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , "a.zummo@towertech.it" , "alexandre.belloni@bootlin.com" , Aisheng Dong , "ulf.hansson@linaro.org" , "sboyd@kernel.org" , Peng Fan , Daniel Baluta , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" "linux-rtc@vger.kernel.org" List-Id: devicetree@vger.kernel.org On Tue, Apr 09, 2019 at 04:59:55AM +0000, Anson Huang wrote: > The System Controller Firmware (SCFW) controls RTC, thermal > and WDOG etc., these resources' interrupt function are managed > by SCU. When any IRQ pending, SCU will notify Linux via MU general > interrupt channel #3, and Linux kernel needs to call SCU APIs > to get IRQ status and notify each module to handle the interrupt. > > Since there is no data transmission for SCU IRQ notification, so > doorbell mode is used for this MU channel, and SCU driver will > use notifier mechanism to broadcast to every module which registers > the SCU block notifier. > > Signed-off-by: Anson Huang > Reviewed-by: Dong Aisheng Applied, thanks.