From: Chunfeng Yun Date: Tue, 8 Jun 2021 07:57:32 +0000 (+0800) Subject: usb: mtu3: power down port when power down device IP X-Git-Tag: accepted/tizen/unified/20230118.172025~6887^2~47 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=960d3557d20377bb984cdcb5758a2f9fd2eeb850;p=platform%2Fkernel%2Flinux-rpi.git 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 Link: https://lore.kernel.org/r/1623139069-8173-7-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index e306b93..562f435 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); }