From 28f9a5e2a3f5441ab5594669ed82da11e32277a9 Mon Sep 17 00:00:00 2001
From: Kristian Evensen <kristian.evensen@gmail.com>
Date: Mon, 30 Apr 2018 14:38:01 +0200
Subject: [PATCH] phy: phy-mtk-tphy: Add hifsys-support

---
 drivers/phy/mediatek/phy-mtk-tphy.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -18,6 +18,8 @@
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #include "phy-mtk-io.h"
 
@@ -267,6 +269,9 @@
 
 #define USER_BUF_LEN(count) min_t(size_t, 8, (count))
 
+#define HIF_SYSCFG1			0x14
+#define HIF_SYSCFG1_PHY2_MASK		(0x3 << 20)
+
 enum mtk_phy_version {
 	MTK_PHY_V1 = 1,
 	MTK_PHY_V2,
@@ -334,6 +339,7 @@ struct mtk_tphy {
 	void __iomem *sif_base;	/* only shared sif */
 	const struct mtk_phy_pdata *pdata;
 	struct mtk_phy_instance **phys;
+	struct regmap *hif;
 	int nphys;
 	int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */
 	int src_coef; /* coefficient for slew rate calibrate */
@@ -951,6 +957,10 @@ static void pcie_phy_instance_init(struc
 	if (tphy->pdata->version != MTK_PHY_V1)
 		return;
 
+	if (tphy->hif)
+		regmap_update_bits(tphy->hif, HIF_SYSCFG1,
+				   HIF_SYSCFG1_PHY2_MASK, 0);
+
 	mtk_phy_update_bits(phya + U3P_U3_PHYA_DA_REG0,
 			    P3A_RG_XTAL_EXT_PE1H | P3A_RG_XTAL_EXT_PE2H,
 			    FIELD_PREP(P3A_RG_XTAL_EXT_PE1H, 0x2) |
@@ -1597,6 +1607,16 @@ static int mtk_tphy_probe(struct platfor
 					 &tphy->src_coef);
 	}
 
+	if (of_find_property(np, "mediatek,phy-switch", NULL)) {
+		tphy->hif = syscon_regmap_lookup_by_phandle(np,
+							    "mediatek,phy-switch");
+		if (IS_ERR(tphy->hif)) {
+			dev_err(&pdev->dev,
+				"missing \"mediatek,phy-switch\" phandle\n");
+			return PTR_ERR(tphy->hif);
+		}
+	}
+
 	port = 0;
 	for_each_child_of_node(np, child_np) {
 		struct mtk_phy_instance *instance;
