On da8xx, VBUS is not maintained during suspend when musb is in host mode.
On resume, all the connected devices will be disconnected and then will
be enumerated again.
This happens because MUSB_DEVCTL is cleared during suspend.
MUSB_DEVCTL is clear twice: once by da8xx_musb_disable()
and once musb_generic_disable().
Don't clear MUSB_DEVCTL in da8xx_musb_disable() and use the quirk
MUSB_PRESERVE_DEVCTL to preseve MUSB_DEVCTL during suspend.
Signed-off-by: Alexandre Bailon <abailon@xxxxxxxxxxxx>
---
drivers/usb/musb/da8xx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index 905f0d9..90f0c06 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -125,7 +125,6 @@ static void da8xx_musb_disable(struct musb *musb)
musb_writel(reg_base, DA8XX_USB_INTR_MASK_CLEAR_REG,
DA8XX_INTR_USB_MASK |
DA8XX_INTR_TX_MASK | DA8XX_INTR_RX_MASK);
- musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
}
@@ -458,7 +457,8 @@ static inline u8 get_vbus_power(struct device *dev)
}
static const struct musb_platform_ops da8xx_ops = {
- .quirks = MUSB_DMA_CPPI | MUSB_INDEXED_EP,
+ .quirks = MUSB_DMA_CPPI | MUSB_INDEXED_EP |
+ MUSB_PRESERVE_DEVCTL,
.init = da8xx_musb_init,
.exit = da8xx_musb_exit,
--
2.7.3
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