From mboxrd@z Thu Jan 1 00:00:00 1970 From: hsinyi@chromium.org (Hsin-Yi, Wang) Date: Wed, 28 Nov 2018 17:53:58 +0800 Subject: [V3] usb/mtu3: power down device ip at setup In-Reply-To: <20181128092953.41541-1-hsinyi@chromium.org> References: <20181128092953.41541-1-hsinyi@chromium.org> Message-ID: <20181128095358.42498-1-hsinyi@chromium.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Originally, when dr_mode is USB_DR_MODE_HOST, it didn't power down device ip, so host ip sleep will fail at ssusb_host_disable. Power down device ip at ssusb_host_setup. Signed-off-by: Hsin-Yi, Wang --- drivers/usb/mtu3/mtu3_plat.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 46551f6d16fd..792c420fd4ad 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -200,6 +200,13 @@ static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb) mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); udelay(1); mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); + + /* + * device ip maybe poweron in LK/BROM stage before enter kernel stage; + * power down device ip, otherwise ip-sleep will fail when works as host + * only mode + */ + mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); } /* ignore the error if the clock does not exist */ -- 2.18.1