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Mon, 20 Jul 2020 04:24:46 -0700 (PDT) From: miguelborgesdefreitas@gmail.com To: a.zummo@towertech.it Subject: [PATCH v2 3/3] ARM: dts: imx6qdl-cubox-i: enable DSM for the RTC Date: Mon, 20 Jul 2020 12:24:01 +0100 Message-Id: <20200720112401.4620-4-miguelborgesdefreitas@gmail.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200720112401.4620-1-miguelborgesdefreitas@gmail.com> References: <20200719145028.3370-3-miguelborgesdefreitas@gmail.com> <20200720112401.4620-1-miguelborgesdefreitas@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200720_072447_757038_114DEB17 X-CRM114-Status: GOOD ( 13.95 ) 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, baruch@tkos.co.il, miguelborgesdefreitas@gmail.com, alexandre.belloni@bootlin.com, festevam@gmail.com, s.hauer@pengutronix.de, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, shawnguo@kernel.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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Miguel Borges de Freitas The cubox-i is one of the examples in which the necessary filtering circuit in the VDD pin of the pcf8523 (1 kOhm resistor + 3.3 microF capacitor) is not available. This leads to failures in the RTC when, after a power cycle, the voltage drop exceeds the recommended value of 0.7V/ms. The hw is designed to support the battery switch-over functionality only in direct-switching mode. Hence, this enforces the option in the cubox-i device-tree. Signed-off-by: Miguel Borges de Freitas --- Changes in v2: - Added extended commit message for git history - Separate dt bindings documentation into a single patch arch/arm/boot/dts/imx6qdl-cubox-i.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/imx6qdl-cubox-i.dtsi b/arch/arm/boot/dts/imx6qdl-cubox-i.dtsi index e3be453..a226c4e 100644 --- a/arch/arm/boot/dts/imx6qdl-cubox-i.dtsi +++ b/arch/arm/boot/dts/imx6qdl-cubox-i.dtsi @@ -144,6 +144,7 @@ rtc@68 { compatible = "nxp,pcf8523"; reg = <0x68>; + pm-enable-dsm; }; }; -- 1.8.3.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel