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Wed, 3 Aug 2022 01:22:44 +0000 From: Liu Ying To: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, saravanak@google.com, gregkh@linuxfoundation.org, geert+renesas@glider.be, krzysztof.kozlowski@linaro.org Subject: [PATCH v2 0/3] drivers: bus: Add Freescale i.MX8qxp pixel link MSI bus support Date: Wed, 3 Aug 2022 09:24:18 +0800 Message-Id: <20220803012421.3410226-1-victor.liu@nxp.com> X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: SI2PR04CA0009.apcprd04.prod.outlook.com (2603:1096:4:197::8) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 79fe8d7c-baec-4b1d-f9c2-08da74eeaae0 X-MS-TrafficTypeDiagnostic: AM8PR04MB7780:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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A power domain and two input clocks need to be enabled before the MSI bus accesses it's child devices, which matches what a simple power-managed bus is(See simple-pm-bus.yaml). Patch 1 adds support to populate simple MFD child devices in the simple-pm-bus driver, since the MSI bus may connect those devices. Patch 2 enables/disables functional clock(s) as a bulk in the simple-pm-bus driver when the simple-pm-bus is being power managed, since the MSI bus takes the two input clocks as functional clocks. Patch 3 adds dt-bindings for the MSI bus. v1->v2: Address Krzysztof's comments on patch 3: * Add a select to explicitly select the MSI bus dt-binding. * List 'simple-pm-bus' explicitly as one item of compatible strings. * Require compatible and reg properties. * Put reg property just after compatible property in example. Liu Ying (3): drivers: bus: simple-pm-bus: Populate simple MFD child devices drivers: bus: simple-pm-bus: Use clocks dt-bindings: bus: Add Freescale i.MX8qxp pixel link MSI bus binding .../bus/fsl,imx8qxp-pixel-link-msi-bus.yaml | 97 +++++++++++++++++++ drivers/bus/simple-pm-bus.c | 61 +++++++++++- 2 files changed, 157 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8qxp-pixel-link-msi-bus.yaml