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Tue, 15 Sep 2020 12:40:40 -0700 (PDT) Received: from xps15 ([64.188.179.253]) by smtp.gmail.com with ESMTPSA id m87sm9622553ilb.58.2020.09.15.12.40.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Sep 2020 12:40:40 -0700 (PDT) Received: (nullmailer pid 2377450 invoked by uid 1000); Tue, 15 Sep 2020 19:40:38 -0000 Date: Tue, 15 Sep 2020 13:40:38 -0600 From: Rob Herring To: Viresh Kumar Subject: Re: [PATCH V3 2/2] dt-bindings: mailbox: add doorbell support to ARM MHU Message-ID: <20200915194038.GA2377399@bogus> References: <7f50b23d157a97242c79bd8f2ab649a9272b9b59.1599731645.git.viresh.kumar@linaro.org> <5d448f579a41345130ae25d01bb94a6e293a6460.1599731645.git.viresh.kumar@linaro.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5d448f579a41345130ae25d01bb94a6e293a6460.1599731645.git.viresh.kumar@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200915_154042_693429_DED9911A X-CRM114-Status: GOOD ( 21.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Vincent Guittot , Arnd Bergmann , Jassi Brar , linux-kernel@vger.kernel.org, Bjorn Andersson , Jassi Brar , Rob Herring , Sudeep Holla , Frank Rowand , 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 10 Sep 2020 15:25:19 +0530, Viresh Kumar wrote: > From: Sudeep Holla > > The ARM MHU's reference manual states following: > > "The MHU drives the signal using a 32-bit register, with all 32 bits > logically ORed together. The MHU provides a set of registers to enable > software to set, clear, and check the status of each of the bits of this > register independently. The use of 32 bits for each interrupt line > enables software to provide more information about the source of the > interrupt. For example, each bit of the register can be associated with > a type of event that can contribute to raising the interrupt." > > This patch thus extends the MHU controller's DT binding to add support > for doorbell mode. > > Though the same MHU hardware controller is used in the two modes, A new > compatible string is added here to represent the combination of the MHU > hardware and the firmware sitting on the other side (which expects each > bit to represent a different signal now). > > Signed-off-by: Sudeep Holla > Co-developed-by: Viresh Kumar > Signed-off-by: Viresh Kumar > --- > V3: Update the json schema and fix number of interrupt lines. > > .../devicetree/bindings/mailbox/arm,mhu.yaml | 60 +++++++++++++++++-- > 1 file changed, 54 insertions(+), 6 deletions(-) > Reviewed-by: Rob Herring _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel