From: Paul Cercueil Date: Tue, 7 Jan 2020 15:26:25 +0000 (-0600) Subject: usb: musb: Disable pullup at init X-Git-Tag: v5.10.7~3518^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=96a0c12843109e5c4d5eb1e09d915fdd0ce31d25;p=platform%2Fkernel%2Flinux-rpi.git usb: musb: Disable pullup at init The pullup may be already enabled before the driver is initialized. This happens for instance on JZ4740. It has to be disabled at init time, as we cannot guarantee that a gadget driver will be bound to the UDC. Signed-off-by: Paul Cercueil Suggested-by: Bin Liu Cc: stable@vger.kernel.org Signed-off-by: Bin Liu Link: https://lore.kernel.org/r/20200107152625.857-3-b-liu@ti.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 0096fc3..5ebf30b 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2318,6 +2318,9 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) musb_disable_interrupts(musb); musb_writeb(musb->mregs, MUSB_DEVCTL, 0); + /* MUSB_POWER_SOFTCONN might be already set, JZ4740 does this. */ + musb_writeb(musb->mregs, MUSB_POWER, 0); + /* Init IRQ workqueue before request_irq */ INIT_DELAYED_WORK(&musb->irq_work, musb_irq_work); INIT_DELAYED_WORK(&musb->deassert_reset_work, musb_deassert_reset);