On Thu, Apr 15, 2021 at 09:27:39PM +0800, peng....@oss.nxp.com wrote:
> From: Peng Fan <peng....@nxp.com>
>
> 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 <peng....@nxp.com>
> ---
> 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)
Much better
Reviewed-by: Mathieu Poirier <mathieu.poir...@linaro.org>
> goto err_put_mbox;
> - }
>
> INIT_WORK(&priv->rproc_work, imx_rproc_vq_work);
>
> --
> 2.7.4
>
