diff options
| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2018-12-09 20:01:29 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-12-10 09:18:19 +0200 |
| commit | cc10ce0c51b13d1566d0ec1dcb472fb86330b391 (patch) | |
| tree | 1b32b127ac77c60abb7cd2f1c2085ccd0c0d0f34 /drivers/usb/dwc2 | |
| parent | 3004cfd6204927c1294060b849029cf0c2651074 (diff) | |
| download | talos-obmc-linux-cc10ce0c51b13d1566d0ec1dcb472fb86330b391.tar.gz talos-obmc-linux-cc10ce0c51b13d1566d0ec1dcb472fb86330b391.zip | |
usb: dwc2: disable power_down on Amlogic devices
Disable power_down by setting the parameter to
DWC2_POWER_DOWN_PARAM_NONE. This fixes a problem on various Amlogic
Meson SoCs where USB devices are only recognized when plugged in before
booting Linux. A hot-plugged USB device was not detected even though the
device got power (my USB thumb drive for example has an LED which lit
up).
A similar fix was implemented for Rockchip SoCs in commit c216765d3a1def
("usb: dwc2: disable power_down on rockchip devices"). That commit
suggests that a change in the dwc2 driver is the cause because the
default value for the "hibernate" parameter (which then got renamed to
"power_down" to support other modes) was changed in the v4.17 merge
window with:
commit 6d23ee9caa6790 ("Merge tag 'usb-for-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-testing").
Cc: <stable@vger.kernel.org> # 4.19
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Suggested-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/params.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index 266157ae179a..24ff5f21cb25 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -118,6 +118,7 @@ static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg) p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI; p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 << GAHBCFG_HBSTLEN_SHIFT; + p->power_down = DWC2_POWER_DOWN_PARAM_NONE; } static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg) |
