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Thu, 15 Apr 2021 13:43:12 +0000 From: peng.fan@oss.nxp.com To: ohad@wizery.com, bjorn.andersson@linaro.org, mathieu.poirier@linaro.org, o.rempel@pengutronix.de, robh+dt@kernel.org, devicetree@vger.kernel.org Cc: shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-remoteproc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Peng Fan Subject: [PATCH V4 6/8] remoteproc: imx_rproc: make clk optional Date: Thu, 15 Apr 2021 21:27:39 +0800 Message-Id: <1618493261-32606-7-git-send-email-peng.fan@oss.nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1618493261-32606-1-git-send-email-peng.fan@oss.nxp.com> References: <1618493261-32606-1-git-send-email-peng.fan@oss.nxp.com> X-Originating-IP: [119.31.174.66] X-ClientProxiedBy: HK2PR02CA0132.apcprd02.prod.outlook.com (2603:1096:202:16::16) To DB6PR0402MB2760.eurprd04.prod.outlook.com (2603:10a6:4:a1::14) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.66) by HK2PR02CA0132.apcprd02.prod.outlook.com (2603:1096:202:16::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.4042.16 via Frontend Transport; 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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 From: Peng Fan To i.MX7ULP, M4 is the master to control everything, no need to provide clk from Linux side. So make clk optional when method is IMX_RPROC_NONE. Signed-off-by: Peng Fan --- drivers/remoteproc/imx_rproc.c | 46 ++++++++++++++++++++++++++++-------------- 1 file changed, 31 insertions(+), 15 deletions(-) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 2b633fd..56dfcc1 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -606,6 +606,35 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv) return 0; } +static int imx_rproc_clk_enable(struct imx_rproc *priv) +{ + const struct imx_rproc_dcfg *dcfg = priv->dcfg; + struct device *dev = priv->dev; + int ret; + + /* Remote core is not under control of Linux */ + if (dcfg->method == IMX_RPROC_NONE) + return 0; + + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + dev_err(dev, "Failed to get clock\n"); + return PTR_ERR(priv->clk); + } + + /* + * clk for M4 block including memory. Should be + * enabled before .start for FW transfer. + */ + ret = clk_prepare_enable(priv->clk); + if (ret) { + dev_err(dev, "Failed to enable clock\n"); + return ret; + } + + return 0; +} + static int imx_rproc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -654,22 +683,9 @@ static int imx_rproc_probe(struct platform_device *pdev) if (ret) goto err_put_mbox; - priv->clk = devm_clk_get(dev, NULL); - if (IS_ERR(priv->clk)) { - dev_err(dev, "Failed to get clock\n"); - ret = PTR_ERR(priv->clk); - goto err_put_mbox; - } - - /* - * clk for M4 block including memory. Should be - * enabled before .start for FW transfer. - */ - ret = clk_prepare_enable(priv->clk); - if (ret) { - dev_err(&rproc->dev, "Failed to enable clock\n"); + ret = imx_rproc_clk_enable(priv); + if (ret) goto err_put_mbox; - } INIT_WORK(&priv->rproc_work, imx_rproc_vq_work); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel