Some platforms support BC12 which is disabled by default,
here add a property to enable it if need
Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
drivers/phy/mediatek/phy-mtk-tphy.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index 9ab6f2e..3eb8e1b 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -101,6 +101,9 @@
#define P2C_RG_AVALID BIT(2)
#define P2C_RG_IDDIG BIT(1)
+#define U3P_U2PHYBC12C 0x080
+#define P2C_RG_CHGDT_EN BIT(0)
+
#define U3P_U3_CHIP_GPIO_CTLD 0x0c
#define P3C_REG_IP_SW_RST BIT(31)
#define P3C_MCU_BUS_CK_GATE_EN BIT(30)
@@ -297,6 +300,7 @@ struct mtk_phy_instance {
int eye_src;
int eye_vrt;
int eye_term;
+ bool bc12_en;
};
struct mtk_tphy {
@@ -839,12 +843,16 @@ static void phy_parse_property(struct mtk_tphy *tphy,
if (instance->type != PHY_TYPE_USB2)
return;
+ instance->bc12_en = device_property_read_bool(dev, "mediatek,bc12");
device_property_read_u32(dev, "mediatek,eye-src",
&instance->eye_src);
device_property_read_u32(dev, "mediatek,eye-vrt",
&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",
+ instance->bc12_en, instance->eye_src,
+ instance->eye_vrt, instance->eye_term);
}
static void u2_phy_props_set(struct mtk_tphy *tphy,
@@ -854,6 +862,11 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
void __iomem *com = u2_banks->com;
u32 tmp;
+ if (instance->bc12_en) {
+ tmp = readl(com + U3P_U2PHYBC12C);
+ tmp |= P2C_RG_CHGDT_EN; /* BC1.2 path Enable */
+ writel(tmp, com + U3P_U2PHYBC12C);
+ }
if (instance->eye_src) {
tmp = readl(com + U3P_USBPHYACR5);
--
1.9.1
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