Subject: [PATCH 1/3] USB: host: ohci-at91: completely shutdown the controller in at91_stop_hc()

From: Nicolas Ferre <[email-masked]>
Date: Wed, 11 Sep 2019 08:41:52 +0200

From: Boris Krasnovskiy <[email-masked]>

When removing the ohci-at91 module, the fact of not running complete shutdown
of all the ports was keeping additional analog cells consuming power for no
reason.
Doing Reset (OHCI_HCR) to HcCommandStatus register is the way to go, but using
the OHCI controller shutdown procedure is just perfect for this.

Signed-off-by: Boris Krasnovskiy <[email-masked]>
Signed-off-by: Nicolas Ferre <[email-masked]>
---
 drivers/usb/host/ohci-at91.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index fc35a7993b7b..cb63bcd5049a 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -123,7 +123,7 @@ static void at91_stop_hc(struct platform_device *pdev)
 	/*
 	 * Put the USB host controller into reset.
 	 */
-	writel(0, &regs->control);
+	usb_hcd_platform_shutdown(pdev);
 
 	/*
 	 * Stop the USB clocks.
-- 
2.17.1

_______________________________________________
linux-arm-kernel mailing list
[email-masked]
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel