diff options
| author | Yixun Lan <dlan@kernel.org> | 2026-02-16 18:26:53 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-02-27 17:57:00 +0300 |
| commit | f0cf0a882a02dcf28547f32264f6fd37e9a7b147 (patch) | |
| tree | 99efac67cf2aae507c0673e186dc3e80c9862455 | |
| parent | a258d843a3e4cb687da19437f8f81fee55ad7d35 (diff) | |
| download | linux-f0cf0a882a02dcf28547f32264f6fd37e9a7b147.tar.xz | |
phy: k1-usb: add disconnect function support
A disconnect status BIT of USB2 PHY need to be cleared, otherwise
it will fail to work properly during next connection when devices
connect to roothub directly.
Fixes: fe4bc1a08638 ("phy: spacemit: support K1 USB2.0 PHY controller")
Signed-off-by: Yixun Lan <dlan@kernel.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://patch.msgid.link/20260216152653.25244-1-dlan@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/phy/spacemit/phy-k1-usb2.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/phy/spacemit/phy-k1-usb2.c b/drivers/phy/spacemit/phy-k1-usb2.c index 342061380012..9215d0b223b2 100644 --- a/drivers/phy/spacemit/phy-k1-usb2.c +++ b/drivers/phy/spacemit/phy-k1-usb2.c @@ -48,6 +48,9 @@ #define PHY_CLK_HSTXP_EN BIT(3) /* clock hstxp enable */ #define PHY_HSTXP_MODE BIT(4) /* 0: force en_txp to be 1; 1: no force */ +#define PHY_K1_HS_HOST_DISC 0x40 +#define PHY_K1_HS_HOST_DISC_CLR BIT(0) + #define PHY_PLL_DIV_CFG 0x98 #define PHY_FDIV_FRACT_8_15 GENMASK(7, 0) #define PHY_FDIV_FRACT_16_19 GENMASK(11, 8) @@ -142,9 +145,20 @@ static int spacemit_usb2phy_exit(struct phy *phy) return 0; } +static int spacemit_usb2phy_disconnect(struct phy *phy, int port) +{ + struct spacemit_usb2phy *sphy = phy_get_drvdata(phy); + + regmap_update_bits(sphy->regmap_base, PHY_K1_HS_HOST_DISC, + PHY_K1_HS_HOST_DISC_CLR, PHY_K1_HS_HOST_DISC_CLR); + + return 0; +} + static const struct phy_ops spacemit_usb2phy_ops = { .init = spacemit_usb2phy_init, .exit = spacemit_usb2phy_exit, + .disconnect = spacemit_usb2phy_disconnect, .owner = THIS_MODULE, }; |