This fixes a clock imbalance that occurs because the SD clock is handled by both PM and the hardware driver. See https://www.spinics.net/lists/linux-mmc/msg44431.html for details. This patch removes the clock handling from the driver's PM callbacks and turns the clock off after probing. Reported-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Signed-off-by: Ulrich Hecht <uli+renesas@xxxxxxxx> --- drivers/mmc/host/tmio_mmc_core.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 31ffcc3..26dcbba 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -1260,9 +1260,14 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host) /* See if we also get DMA */ tmio_mmc_request_dma(_host, pdata); - pm_runtime_set_active(&pdev->dev); +#ifdef CONFIG_PM + /* PM handles the clock; disable it so it won't be enabled twice. */ + if (_host->clk_disable) + _host->clk_disable(_host); + pm_runtime_get_sync(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 50); pm_runtime_use_autosuspend(&pdev->dev); +#endif ret = mmc_add_host(mmc); if (ret) @@ -1302,20 +1307,6 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host) EXPORT_SYMBOL_GPL(tmio_mmc_host_remove); #ifdef CONFIG_PM -static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) -{ - if (!host->clk_enable) - return -ENOTSUPP; - - return host->clk_enable(host); -} - -static void tmio_mmc_clk_disable(struct tmio_mmc_host *host) -{ - if (host->clk_disable) - host->clk_disable(host); -} - int tmio_mmc_host_runtime_suspend(struct device *dev) { struct tmio_mmc_host *host = dev_get_drvdata(dev); @@ -1325,8 +1316,6 @@ int tmio_mmc_host_runtime_suspend(struct device *dev) if (host->clk_cache) host->set_clock(host, 0); - tmio_mmc_clk_disable(host); - return 0; } EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend); @@ -1340,7 +1329,6 @@ int tmio_mmc_host_runtime_resume(struct device *dev) { struct tmio_mmc_host *host = dev_get_drvdata(dev); - tmio_mmc_clk_enable(host); tmio_mmc_hw_reset(host->mmc); if (host->clk_cache) -- 2.7.4
