4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Tony Lindgren <[email protected]> commit 58a66dba1beac2121d931cda4682ae4d40816af5 upstream. If we reload phy-twl4030-usb, we get a warning about unbalanced pm_runtime_enable. Let's fix the issue and also fix idling of the device on unload before we attempt to shut it down. If we don't properly idle the PHY before shutting it down on removal, the twl4030 ends up consuming about 62mW of extra power compared to running idle with the module loaded. Cc: Bin Liu <[email protected]> Cc: Felipe Balbi <[email protected]> Cc: Kishon Vijay Abraham I <[email protected]> Cc: NeilBrown <[email protected]> Signed-off-by: Tony Lindgren <[email protected]> Signed-off-by: Kishon Vijay Abraham I <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/phy/phy-twl4030-usb.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) --- a/drivers/phy/phy-twl4030-usb.c +++ b/drivers/phy/phy-twl4030-usb.c @@ -715,6 +715,7 @@ static int twl4030_usb_probe(struct plat pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); /* Our job is to use irqs and status from the power module * to keep the transceiver disabled when nothing's connected. @@ -758,6 +759,13 @@ static int twl4030_usb_remove(struct pla /* set transceiver mode to power on defaults */ twl4030_usb_set_mode(twl, -1); + /* idle ulpi before powering off */ + if (cable_present(twl->linkstat)) + pm_runtime_put_noidle(twl->dev); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_sync_suspend(twl->dev); + pm_runtime_disable(twl->dev); + /* autogate 60MHz ULPI clock, * clear dpll clock request for i2c access, * disable 32KHz @@ -772,11 +780,6 @@ static int twl4030_usb_remove(struct pla /* disable complete OTG block */ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); - if (cable_present(twl->linkstat)) - pm_runtime_put_noidle(twl->dev); - pm_runtime_mark_last_busy(twl->dev); - pm_runtime_put(twl->dev); - return 0; }
