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authorChunfeng Yun <chunfeng.yun@mediatek.com>2021-06-08 10:57:32 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-06-15 16:42:37 +0300
commit960d3557d20377bb984cdcb5758a2f9fd2eeb850 (patch)
tree586f58b47b69f8bc9049e0a092a3c32282b48441 /drivers/usb/mtu3
parentb057da6d549103268a1fcb54046b209309447ae8 (diff)
downloadlinux-960d3557d20377bb984cdcb5758a2f9fd2eeb850.tar.xz
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>
Diffstat (limited to 'drivers/usb/mtu3')
-rw-r--r--drivers/usb/mtu3/mtu3_core.c9
1 files changed, 9 insertions, 0 deletions
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);
}