[PATCH 1/2] phy: ti: j721e-wiz: Manage TypeC lane swap if typec-dir-gpios not specified

[Sinthu Raja]

From: Sinthu Raja <sinthu.raja at ti.com>

It's possible that the Type-C plug orientation on the DIR line will be
implemented through hardware design. In that situation, there won't be
an external GPIO line available, but the driver still needs to address
this since the DT won't use the typec-dir-gpios property.

Add code to handle LN10 Type-C swap if typec-dir-gpios property is not
specified in DT.

Signed-off-by: Sinthu Raja <sinthu.raja at ti.com>
---
 drivers/phy/ti/phy-j721e-wiz.c | 38 ++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 9 deletions(-)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index 6646b15d41..8e29f39cd8 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -329,6 +329,7 @@ struct wiz {
 	u32			num_lanes;
 	struct gpio_desc	*gpio_typec_dir;
 	u32			lane_phy_type[WIZ_MAX_LANES];
+	u32			master_lane_num[WIZ_MAX_LANES];
 	struct clk		*input_clks[WIZ_MAX_INPUT_CLOCKS];
 	unsigned int		id;
 	const struct wiz_data	*data;
@@ -586,14 +587,31 @@ static int wiz_reset_deassert(struct reset_ctl *reset_ctl)
 		return ret;
 
 	/* if typec-dir gpio was specified, set LN10 SWAP bit based on that */
-	if (id == 0 && wiz->gpio_typec_dir) {
-		if (dm_gpio_get_value(wiz->gpio_typec_dir)) {
-			regmap_update_bits(wiz->regmap, WIZ_SERDES_TYPEC,
-					   WIZ_SERDES_TYPEC_LN10_SWAP,
-					   WIZ_SERDES_TYPEC_LN10_SWAP);
-		} else {
-			regmap_update_bits(wiz->regmap, WIZ_SERDES_TYPEC,
-					   WIZ_SERDES_TYPEC_LN10_SWAP, 0);
+	if (id == 0) {
+		if (wiz->gpio_typec_dir) {
+			if (dm_gpio_get_value(wiz->gpio_typec_dir)) {
+				regmap_update_bits(wiz->regmap, WIZ_SERDES_TYPEC,
+						WIZ_SERDES_TYPEC_LN10_SWAP,
+						WIZ_SERDES_TYPEC_LN10_SWAP);
+			} else {
+				regmap_update_bits(wiz->regmap, WIZ_SERDES_TYPEC,
+						WIZ_SERDES_TYPEC_LN10_SWAP, 0);
+			}
+		}
+	} else {
+		/* if no typec-dir gpio was specified and PHY type is
+		 * USB3 with master lane number is '0', set LN10 SWAP
+		 * bit to '1'
+		 */
+		u32 num_lanes = wiz->num_lanes;
+		int i;
+
+		for (i = 0; i < num_lanes; i++) {
+			if (wiz->lane_phy_type[i] == PHY_TYPE_USB3)
+				if (wiz->master_lane_num[i] == 0)
+					regmap_update_bits(wiz->regmap, WIZ_SERDES_TYPEC,
+							WIZ_SERDES_TYPEC_LN10_SWAP,
+							WIZ_SERDES_TYPEC_LN10_SWAP);
 		}
 	}
 
@@ -1100,8 +1118,10 @@ static int wiz_get_lane_phy_types(struct udevice *dev, struct wiz *wiz)
 		dev_dbg(dev, "%s: Lanes %u-%u have phy-type %u\n", __func__,
 			reg, reg + num_lanes - 1, phy_type);
 
-		for (i = reg; i < reg + num_lanes; i++)
+		for (i = reg; i < reg + num_lanes; i++) {
 			wiz->lane_phy_type[i] = phy_type;
+			wiz->master_lane_num[i] = reg;
+		}
 	}
 
 	return 0;
-- 
2.36.1