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Tue, 22 Jan 2019 09:43:35 +0800 Message-ID: <1548121414.4433.257.camel@mhfsdcap03> Subject: Re: [PATCH v4 5/6] usb: musb: Add musb_clearb/w() interface From: Min Guo To: Bin Liu Date: Tue, 22 Jan 2019 09:43:34 +0800 In-Reply-To: <20190121155929.GC30080@uda0271908> References: <1548073351-13739-1-git-send-email-min.guo@mediatek.com> <1548073351-13739-6-git-send-email-min.guo@mediatek.com> <20190121155929.GC30080@uda0271908> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190121_174417_580108_01664F94 X-CRM114-Status: GOOD ( 17.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, hdegoede@redhat.com, tony@atomide.com, Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Matthias Brugger , Rob Herring , Alan Stern , chunfeng.yun@mediatek.com, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Bin, On Mon, 2019-01-21 at 09:59 -0600, Bin Liu wrote: > Hi Min, > > On Mon, Jan 21, 2019 at 08:22:30PM +0800, min.guo@mediatek.com wrote: > > From: Min Guo > > > > Delete the const attribute of addr parameter in readb/w/l hooks, these > > changes are for implementing clearing W1C registers. > > Replace musb_readb/w with musb_clearb/w to clear the interrupt status. > > > > Signed-off-by: Min Guo > > --- > > new patch based on v3: > > --- > > drivers/usb/musb/musb_core.c | 32 +++++++++++++++++++++++--------- > > drivers/usb/musb/musb_core.h | 8 ++++++-- > > drivers/usb/musb/musb_io.h | 8 +++++--- > > drivers/usb/musb/musbhsdma.c | 3 +++ > > drivers/usb/musb/sunxi.c | 4 ++-- > > drivers/usb/musb/tusb6010.c | 2 +- > > 6 files changed, 40 insertions(+), 17 deletions(-) > > > > diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c > > index 2fe5225..5ef8848 100644 > > --- a/drivers/usb/musb/musb_core.c > > +++ b/drivers/usb/musb/musb_core.c > > [snip] > > > diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c > > index b2394a7..7bf91cb 100644 > > --- a/drivers/usb/musb/musbhsdma.c > > +++ b/drivers/usb/musb/musbhsdma.c > > @@ -286,6 +286,9 @@ irqreturn_t dma_controller_irq(int irq, void *private_data) > > > > int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR); > > > > + /* clear pending interrupts by manual */ > > + musb_clearb(musb->mregs, MUSB_HSDMA_INTR); > > + > > Make musb_clearb/w() return the value of the _read() instead of > _write(), so that we don't have to read twice here. The value of > _write() is not used anyway. > > The change above can be: > > int_hsdma = musb_clearb(mbase, MUSB_HSDMA_INTR); > > Please see my comments in 6/6 for details. Okay. > Regards, > -Bin. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel