diff options
| author | Jagan Teki <jagan@amarulasolutions.com> | 2018-05-07 13:03:37 +0530 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2018-05-28 16:40:43 +0530 |
| commit | aa29b11b3fdeaedb9689e89e467e6bbd036780ac (patch) | |
| tree | 7fa2303d653682ed99a61a6499812763832cfb7c /drivers/phy | |
| parent | 237050fc62c8313a50cd3618dbb21638a818f0bb (diff) | |
phy: sun4i-usb: Add a sunxi specific function for setting squelch-detect
The sunxi otg phy has a bug where it wrongly detects a high speed squelch
when reset on the root port gets de-asserted with a lo-speed device.
The workaround for this is to disable squelch detect before de-asserting
reset, and re-enabling it after the reset de-assert is done. Add a sunxi
specific phy function to allow the sunxi-musb glue to do this.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Jun Nie <jun.nie@linaro.org>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/allwinner/phy-sun4i-usb.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c index 4194a15007..2b3cf48025 100644 --- a/drivers/phy/allwinner/phy-sun4i-usb.c +++ b/drivers/phy/allwinner/phy-sun4i-usb.c @@ -36,6 +36,7 @@ #define PHY_TX_AMPLITUDE_TUNE 0x20 #define PHY_TX_SLEWRATE_TUNE 0x22 #define PHY_DISCON_TH_SEL 0x2a +#define PHY_SQUELCH_DETECT 0x3c #define PHYCTL_DATA BIT(7) #define OTGCTL_ROUTE_MUSB BIT(0) @@ -383,6 +384,11 @@ int sun4i_usb_phy_id_detect(struct phy *phy) return gpio_get_value(usb_phy->gpio_id_det); } +void sun4i_usb_phy_set_squelch_detect(struct phy *phy, bool enabled) +{ + sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); +} + static struct phy_ops sun4i_usb_phy_ops = { .of_xlate = sun4i_usb_phy_xlate, .init = sun4i_usb_phy_init, |