On 25/08/17 01:19, Zhoujie Wu wrote:
> Enable runtime pm support for xenon controller, which uses 50ms
> auto runtime suspend by default.
This patch seems to break system system. Does it really make sense to have
2 separate patches? Maybe consider putting them together.
>
> Signed-off-by: Zhoujie Wu <zjwu@xxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-xenon.c | 61 +++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 60 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c
> index 306ffaf..517ff2e 100644
> --- a/drivers/mmc/host/sdhci-xenon.c
> +++ b/drivers/mmc/host/sdhci-xenon.c
> @@ -18,6 +18,8 @@
> #include <linux/ktime.h>
> #include <linux/module.h>
> #include <linux/of.h>
> +#include <linux/pm.h>
> +#include <linux/pm_runtime.h>
>
> #include "sdhci-pltfm.h"
> #include "sdhci-xenon.h"
> @@ -506,13 +508,24 @@ static int xenon_probe(struct platform_device *pdev)
> if (err)
> goto err_clk;
>
> + pm_runtime_get_noresume(&pdev->dev);
> + pm_runtime_set_active(&pdev->dev);
> + pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
> + pm_runtime_use_autosuspend(&pdev->dev);
> + pm_runtime_enable(&pdev->dev);
I would expect to see a corresponding pm_runtime_disable() in xenon_remove()
e.g.
pm_runtime_get_sync(dev);
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
sdhci_remove_host(host, 0);
> + pm_suspend_ignore_children(&pdev->dev, 1);
> +
> err = sdhci_add_host(host);
> if (err)
> goto remove_sdhc;
>
> + pm_runtime_put_autosuspend(&pdev->dev);
> +
> return 0;
>
> remove_sdhc:
> + pm_runtime_disable(&pdev->dev);
> + pm_runtime_put_noidle(&pdev->dev);
> xenon_sdhc_unprepare(host);
> err_clk:
> clk_disable_unprepare(pltfm_host->clk);
> @@ -577,6 +590,52 @@ static int xenon_resume(struct device *dev)
>
> static SIMPLE_DEV_PM_OPS(xenon_pmops, xenon_suspend, xenon_resume);
>
> +#ifdef CONFIG_PM
> +static int xenon_runtime_suspend(struct device *dev)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
> + int ret;
> +
> + ret = sdhci_runtime_suspend_host(host);
> +
> + if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> + mmc_retune_needed(host->mmc);
> +
> + clk_disable_unprepare(pltfm_host->clk);
> + /*
> + * Need to update the priv->clock here, or when runtime resume
> + * back, phy don't aware the clock change and won't adjust phy
> + * which will cause cmd err
> + */
> + priv->clock = 0;
> + return ret;
> +}
> +
> +static int xenon_runtime_resume(struct device *dev)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + int ret;
> +
> + ret = clk_prepare_enable(pltfm_host->clk);
> + if (ret) {
> + dev_err(dev, "can't enable mainck\n");
> + return ret;
> + }
> +
> + return sdhci_runtime_resume_host(host);
> +}
> +#endif /* CONFIG_PM */
> +
> +static const struct dev_pm_ops sdhci_xenon_dev_pm_ops = {
> + SET_RUNTIME_PM_OPS(xenon_runtime_suspend,
> + xenon_runtime_resume,
> + NULL)
> +};
> +
> +
> static const struct of_device_id sdhci_xenon_dt_ids[] = {
> { .compatible = "marvell,armada-ap806-sdhci",},
> { .compatible = "marvell,armada-cp110-sdhci",},
> @@ -589,7 +648,7 @@ static int xenon_resume(struct device *dev)
> .driver = {
> .name = "xenon-sdhci",
> .of_match_table = sdhci_xenon_dt_ids,
> - .pm = &xenon_pmops,
> + .pm = &sdhci_xenon_dev_pm_ops,
> },
> .probe = xenon_probe,
> .remove = xenon_remove,
>
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