diff mbox series

[06/23] usb: mtu3: power down port when power down device IP

Message ID 1623139069-8173-7-git-send-email-chunfeng.yun@mediatek.com
State New
Headers show
Series Add support gadget (runtime) PM | expand

Commit Message

Chunfeng Yun (云春峰) June 8, 2021, 7:57 a.m. UTC 
When power down device IP, we can also power down device port,
then power on the port again when power on device ip, it's helpful
to make device ip enter ip sleep mode.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/usb/mtu3/mtu3_core.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index e306b93c007d..562f4357831e 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -334,6 +334,10 @@  void mtu3_start(struct mtu3 *mtu)
 		mtu3_readl(mbase, U3D_DEVICE_CONTROL));
 
 	mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+	if (mtu->is_u3_ip)
+		mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+	mtu3_clrbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
 
 	mtu3_csr_init(mtu);
 	mtu3_set_speed(mtu, mtu->speed);
@@ -356,6 +360,11 @@  void mtu3_stop(struct mtu3 *mtu)
 		mtu3_dev_on_off(mtu, 0);
 
 	mtu->is_active = 0;
+
+	if (mtu->is_u3_ip)
+		mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+	mtu3_setbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
 	mtu3_setbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
 }