linux-kernel - [PATCH v2 2/4] usb: aspeed-vhub: support auto remote wakeup feature

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Message-ID: <20211130104256.3106797-3-neal_liu@aspeedtech.com>
Date:   Tue, 30 Nov 2021 18:42:54 +0800
From:   Neal Liu <neal_liu@...eedtech.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Cai Huoqing <caihuoqing@...du.com>,
        Tao Ren <rentao.bupt@...il.com>,
        Julia Lawall <julia.lawall@...ia.fr>,
        "kernel test robot" <lkp@...el.com>,
        Sasha Levin <sashal@...nel.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-aspeed@...ts.ozlabs.org>
CC:     Neal Liu <neal_liu@...eedtech.com>, <BMC-SW@...eedtech.com>
Subject: [PATCH v2 2/4] usb: aspeed-vhub: support auto remote wakeup feature

Remote wakeup signaling will be automatically issued
whenever any write commands has been received in suspend
state.

Signed-off-by: Neal Liu <neal_liu@...eedtech.com>
---
 drivers/usb/gadget/udc/aspeed-vhub/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
index 7a635c499777..122ee7ef0b03 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -240,6 +240,9 @@ void ast_vhub_init_hw(struct ast_vhub *vhub)
 	if (vhub->force_usb1)
 		ctrl |= VHUB_CTRL_FULL_SPEED_ONLY;
 
+	/* Enable auto remote wakeup */
+	ctrl |= VHUB_CTRL_AUTO_REMOTE_WAKEUP;
+
 	ctrl |= VHUB_CTRL_UPSTREAM_CONNECT;
 	writel(ctrl, vhub->regs + AST_VHUB_CTRL);
 
-- 
2.25.1