[PATCH V2 RESEND 2/2] phy: mediatek: xsphy: add support to set disconnect threshold

[Chunfeng Yun <chunfeng.yun@mediatek.com>]

Add a property to tune usb2 phy's disconnect threshold.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2: change property name
---
 drivers/phy/mediatek/phy-mtk-xsphy.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/mediatek/phy-mtk-xsphy.c b/drivers/phy/mediatek/phy-mtk-xsphy.c
index c0ddb9273cc3..46345e4f4189 100644
--- a/drivers/phy/mediatek/phy-mtk-xsphy.c
+++ b/drivers/phy/mediatek/phy-mtk-xsphy.c
@@ -61,6 +61,7 @@
 #define XSP_USBPHYACR6		((SSUSB_SIFSLV_U2PHY_COM) + 0x018)
 #define P2A6_RG_BC11_SW_EN	BIT(23)
 #define P2A6_RG_OTG_VBUSCMP_EN	BIT(20)
+#define PA6_RG_U2_DISCTH	GENMASK(7, 4)
 
 #define XSP_U2PHYDTM1		((SSUSB_SIFSLV_U2PHY_COM) + 0x06C)
 #define P2D_FORCE_IDDIG		BIT(9)
@@ -107,6 +108,7 @@ struct xsphy_instance {
 	int eye_src;
 	int eye_vrt;
 	int eye_term;
+	int discth;
 };
 
 struct mtk_xsphy {
@@ -256,9 +258,12 @@ static void phy_parse_property(struct mtk_xsphy *xsphy,
 					 &inst->eye_vrt);
 		device_property_read_u32(dev, "mediatek,eye-term",
 					 &inst->eye_term);
-		dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d\n",
+		device_property_read_u32(dev, "mediatek,discth",
+					 &inst->discth);
+		dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d, discth:%d\n",
 			inst->efuse_intr, inst->eye_src,
-			inst->eye_vrt, inst->eye_term);
+			inst->eye_vrt, inst->eye_term,
+			inst->discth);
 		break;
 	case PHY_TYPE_USB3:
 		device_property_read_u32(dev, "mediatek,efuse-intr",
@@ -301,6 +306,9 @@ static void u2_phy_props_set(struct mtk_xsphy *xsphy,
 	if (inst->eye_term)
 		mtk_phy_update_field(pbase + XSP_USBPHYACR1, P2A1_RG_TERM_SEL,
 				     inst->eye_term);
+	if (inst->discth)
+		mtk_phy_update_field(pbase + XSP_USBPHYACR6, PA6_RG_U2_DISCTH,
+				     inst->discth);
 }
 
 static void u3_phy_props_set(struct mtk_xsphy *xsphy,
-- 
2.45.2