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Received: from DU0PR04MB9417.eurprd04.prod.outlook.com (2603:10a6:10:358::11) by VE1PR04MB6384.eurprd04.prod.outlook.com (2603:10a6:803:126::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5017.26; Mon, 28 Feb 2022 12:39:23 +0000 Received: from DU0PR04MB9417.eurprd04.prod.outlook.com ([fe80::552c:ed46:26dc:77cc]) by DU0PR04MB9417.eurprd04.prod.outlook.com ([fe80::552c:ed46:26dc:77cc%4]) with mapi id 15.20.4995.018; Mon, 28 Feb 2022 12:39:23 +0000 From: "Peng Fan (OSS)" To: sboyd@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, abel.vesa@nxp.com Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Peng Fan Subject: [PATCH V2 2/2] clk: imx8m: check mcore_booted before register clk Date: Mon, 28 Feb 2022 20:41:12 +0800 Message-Id: <20220228124112.3974242-2-peng.fan@oss.nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220228124112.3974242-1-peng.fan@oss.nxp.com> References: <20220228124112.3974242-1-peng.fan@oss.nxp.com> X-ClientProxiedBy: SI2PR01CA0033.apcprd01.prod.exchangelabs.com (2603:1096:4:192::23) To DU0PR04MB9417.eurprd04.prod.outlook.com (2603:10a6:10:358::11) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4083fc75-4b2f-4620-7c2f-08d9fab75936 X-MS-TrafficTypeDiagnostic: VE1PR04MB6384:EE_ X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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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-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: Peng Fan If mcore_booted is true, ignore the clk root gate registration and this will simplify AMP clock management and avoid system hang unexpectly especially Linux shutdown clk used by mcore. Signed-off-by: Peng Fan --- V2: None drivers/clk/imx/clk-composite-8m.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c index 2dfd6149e528..b16c2c0ea9f6 100644 --- a/drivers/clk/imx/clk-composite-8m.c +++ b/drivers/clk/imx/clk-composite-8m.c @@ -223,14 +223,19 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name, div->lock = &imx_ccm_lock; div->flags = CLK_DIVIDER_ROUND_CLOSEST; - gate = kzalloc(sizeof(*gate), GFP_KERNEL); - if (!gate) - goto fail; - - gate_hw = &gate->hw; - gate->reg = reg; - gate->bit_idx = PCG_CGC_SHIFT; - gate->lock = &imx_ccm_lock; + /* skip registering the gate ops if M4 is enabled */ + if (mcore_booted) { + gate_hw = NULL; + } else { + gate = kzalloc(sizeof(*gate), GFP_KERNEL); + if (!gate) + goto fail; + + gate_hw = &gate->hw; + gate->reg = reg; + gate->bit_idx = PCG_CGC_SHIFT; + gate->lock = &imx_ccm_lock; + } hw = clk_hw_register_composite(NULL, name, parent_names, num_parents, mux_hw, mux_ops, div_hw, -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel