From: Minkyu Kang <[email protected]> The MPU module can be waked up by the unexpected USB interrupt(HSUSB_MC_NINT). For instance, if the MUSB is working as peripheral mode and connected to a host PC, it can never enter the low power mode due to interrupts from the host PC. This patch added the feature that a board specific file can determines that TWL4030 supplies the USB power or not in the low power mode. Disabling the USB power may save the power consumption.
Signed-off-by: Minkyu Kang <[email protected]> Signed-off-by: Kim Kyuwon <[email protected]> --- drivers/usb/otg/twl4030-usb.c | 25 +++++++++++++++++++++++++ include/linux/i2c/twl4030.h | 1 + 2 files changed, 26 insertions(+), 0 deletions(-) diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c index 416e441..0d65a8d 100644 --- a/drivers/usb/otg/twl4030-usb.c +++ b/drivers/usb/otg/twl4030-usb.c @@ -256,6 +256,7 @@ struct twl4030_usb { u8 linkstat; u8 asleep; bool irq_enabled; + bool suspend_enabled; }; /* internal define on top of container_of */ @@ -618,6 +619,7 @@ static int __init twl4030_usb_probe(struct platform_device *pdev) twl->otg.set_suspend = twl4030_set_suspend; twl->usb_mode = pdata->usb_mode; twl->asleep = 1; + twl->suspend_enabled = pdata->suspend_enabled; /* init spinlock for workqueue */ spin_lock_init(&twl->lock); @@ -694,9 +696,32 @@ static int __exit twl4030_usb_remove(struct platform_device *pdev) return 0; } +int twl4030_usb_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct twl4030_usb *twl = platform_get_drvdata(pdev); + + if (!twl->suspend_enabled) + return 0; + + twl->otg.set_suspend(&twl->otg, 1); + + return 0; +} + +int twl4030_usb_resume(struct platform_device *pdev) +{ + struct twl4030_usb *twl = platform_get_drvdata(pdev); + + twl->otg.set_suspend(&twl->otg, 0); + + return 0; +} + static struct platform_driver twl4030_usb_driver = { .probe = twl4030_usb_probe, .remove = __exit_p(twl4030_usb_remove), + .suspend = twl4030_usb_suspend, + .resume = twl4030_usb_resume, .driver = { .name = "twl4030_usb", .owner = THIS_MODULE, diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h index c89d33b..0b12509 100644 --- a/include/linux/i2c/twl4030.h +++ b/include/linux/i2c/twl4030.h @@ -325,6 +325,7 @@ enum twl4030_usb_mode { struct twl4030_usb_data { enum twl4030_usb_mode usb_mode; + bool suspend_enabled; }; struct twl4030_ins { -- 1.5.2.5 -- Kyuwon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
