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Mon, 23 Jan 2023 11:21:36 -0800 (PST) Message-ID: Date: Mon, 23 Jan 2023 11:21:28 -0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: [PATCH 3/6] rtc: brcmstb-waketimer: compensate for lack of wktmr disable Content-Language: en-US To: Doug Berger , Alessandro Zummo , Alexandre Belloni Cc: Brian Norris , Markus Mayer , Rob Herring , Krzysztof Kozlowski , Florian Fainelli , Broadcom internal kernel review list , linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20230120190147.718976-1-opendmb@gmail.com> <20230120190147.718976-4-opendmb@gmail.com> From: Florian Fainelli In-Reply-To: <20230120190147.718976-4-opendmb@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230123_112141_081139_1E476979 X-CRM114-Status: GOOD ( 15.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 1/20/23 11:01, Doug Berger wrote: > Since the WKTMR hardware block cannot be disabled it is necessary > for the driver to accommodate for associated timing hazards. This > commit targets the following possibilities: > > A possible race between clearing a wktmr event and the alarm expiring > is made one-sided by setting the alarm to its maximum value before > clearing the event. > > Programming alarm values close to the current time may not trigger > events if the counter advances while the alarm is being programmed. > After programming an alarm, a check is made to ensure that it is > either in the future or an expiration event is pending. > > Signed-off-by: Doug Berger Acked-by: Florian Fainelli -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel