From cc0316c10fb7063022f604fdaee129109723d1ea Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Thu, 6 May 2021 12:08:41 +0800 Subject: remoteproc: imx_rproc: make clk optional 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 Reviewed-by: Mathieu Poirier Link: https://lore.kernel.org/r/1620274123-1461-7-git-send-email-peng.fan@oss.nxp.com Signed-off-by: Bjorn Andersson --- drivers/remoteproc/imx_rproc.c | 46 ++++++++++++++++++++++++++++-------------- 1 file changed, 31 insertions(+), 15 deletions(-) (limited to 'drivers/remoteproc') diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 6289aeae95b6..e9d9860e4fce 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -590,6 +590,35 @@ 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; @@ -648,22 +677,9 @@ 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); -- cgit v1.2.3