android/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

phy: phy-mtk-tphy: add a property for disconnect threshold

Browse Source 
This is used to tune the threshold of disconnect, the index range
is [0, 15], the threshold voltage is about 400mV for 0, 700mV for
15, and the step is 20mV.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Chunfeng Yun 2020-01-08 09:52:01 +08:00 committed by Kishon Vijay Abraham I
parent 7dffdebb61
commit 8be5a67f71
1 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/phy/mediatek/phy-mtk-tphy.c
View File

@ -60,6 +60,8 @@
#define U3P_USBPHYACR6 0x018
#define PA6_RG_U2_BC11_SW_EN BIT(23)
#define PA6_RG_U2_OTG_VBUSCMP_EN BIT(20)
#define PA6_RG_U2_DISCTH GENMASK(7, 4)
#define PA6_RG_U2_DISCTH_VAL(x) ((0xf & (x)) << 4)
#define PA6_RG_U2_SQTH GENMASK(3, 0)
#define PA6_RG_U2_SQTH_VAL(x) (0xf & (x))
@ -300,6 +302,7 @@ struct mtk_phy_instance {
int eye_src;
int eye_vrt;
int eye_term;
int discth;
bool bc12_en;
};
@ -850,9 +853,12 @@ static void phy_parse_property(struct mtk_tphy *tphy,
&instance->eye_vrt);
device_property_read_u32(dev, "mediatek,eye-term",
&instance->eye_term);
dev_dbg(dev, "bc12:%d, src:%d, vrt:%d, term:%d\n",
device_property_read_u32(dev, "mediatek,discth",
&instance->discth);
dev_dbg(dev, "bc12:%d, src:%d, vrt:%d, term:%d, disc:%d\n",
instance->bc12_en, instance->eye_src,
instance->eye_vrt, instance->eye_term);
instance->eye_vrt, instance->eye_term,
instance->discth);
}
static void u2_phy_props_set(struct mtk_tphy *tphy,
@ -888,6 +894,13 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
tmp |= PA1_RG_TERM_SEL_VAL(instance->eye_term);
writel(tmp, com + U3P_USBPHYACR1);
}
if (instance->discth) {
tmp = readl(com + U3P_USBPHYACR6);
tmp &= ~PA6_RG_U2_DISCTH;
tmp |= PA6_RG_U2_DISCTH_VAL(instance->discth);
writel(tmp, com + U3P_USBPHYACR6);
}
}
static int mtk_phy_init(struct phy *phy)