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Fri, 17 Sep 2021 12:20:33 +0000 From: To: , , , , CC: , , Subject: Re: [PATCH v3 01/17] clk: at91: re-factor clocks suspend/resume Thread-Topic: [PATCH v3 01/17] clk: at91: re-factor clocks suspend/resume Thread-Index: AQHXq75pmfCE8nfFy0iZXcBE2Xbfhw== Date: Fri, 17 Sep 2021 12:20:33 +0000 Message-ID: <75da98f4-dd5d-33ae-33f0-4b3dbfc4e7b2@microchip.com> References: <20210917120642.8993-1-claudiu.beznea@microchip.com> <20210917120642.8993-2-claudiu.beznea@microchip.com> In-Reply-To: <20210917120642.8993-2-claudiu.beznea@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 authentication-results: baylibre.com; dkim=none (message not signed) header.d=none; baylibre.com; dmarc=none action=none header.from=microchip.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2304799a-68b9-4e14-55f5-08d979d58c2b x-ms-traffictypediagnostic: SA0PR11MB4655: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; 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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 17.09.2021 15:06, Claudiu Beznea wrote: > SAMA5D2 and SAMA7G5 have a special power saving mode (backup mode) where > most of the SoC's components are powered off (including PMC). Resuming > from this mode is done with the help of bootloader. Peripherals are not > aware of the power saving mode thus most of them are disabling clocks in > proper suspend API and re-enable them in resume API without taking into > account the previously setup rate. Moreover some of the peripherals are > acting as wakeup sources and are not disabling the clocks in this > scenario, when suspending. Since backup mode cuts the power for > peripherals, in resume part these clocks needs to be re-configured. > > The initial PMC suspend/resume code was designed only for SAMA5D2's PMC > (as it was the only one supporting backup mode). SAMA7G supports also > backup mode and its PMC is different (few new functionalities, different > registers offsets, different offsets in registers for each > functionalities). To address both SAMA5D2 and SAMA7G5 PMC add > .save_context()/.resume_context() support to each clocks driver and call > this from PMC driver. > > Signed-off-by: Claudiu Beznea I forgot to mention that this patch applies good on top of patch at [1]. Thank you, Claudiu Beznea [1] https://lore.kernel.org/lkml/20210913082633.110168-1-clement.leger@bootlin.com/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel