Commit 960d3557 authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
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usb: mtu3: power down port when power down device IP 



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: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1623139069-8173-7-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b057da6d

drivers/usb/mtu3/mtu3_core.c

+9 −0
Original line number Diff line number Diff line
@@ -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);

}