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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: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1623139069-8173-7-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2021-06-08 15:57:32 +08:00 committed by Greg Kroah-Hartman
parent b057da6d54
commit 960d3557d2
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/mtu3/mtu3_core.c
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@ -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);
}