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mediatek: re-add u3phy2 phy-switch patch 

This patch is required for pcie@2,0 in mt7623 to work. The patch was originally
added in kernel 4.14, but it has not been ported to 4.19 and later.

Fixes: FS#3217
Tested-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
This commit is contained in:
Sungbo Eo 2020-05-29 22:06:35 +09:00 committed by Petr Štetiar
parent 923792369e
commit 36105880ee
1 changed files with 66 additions and 0 deletions
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66
target/linux/mediatek/patches-5.4/0226-phy-phy-mtk-tphy-Add-hifsys-support.patch Normal file
View File

@ -0,0 +1,66 @@
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
@@ -15,6 +15,8 @@
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
/* version V1 sub-banks offset base address */
/* banks shared by multiple phys */
@@ -263,6 +265,9 @@
#define RG_CDR_BIRLTD0_GEN3_MSK GENMASK(4, 0)
#define RG_CDR_BIRLTD0_GEN3_VAL(x) (0x1f & (x))
+#define HIF_SYSCFG1 0x14
+#define HIF_SYSCFG1_PHY2_MASK (0x3 << 20)
+
enum mtk_phy_version {
MTK_PHY_V1 = 1,
MTK_PHY_V2,
@@ -310,6 +315,7 @@ struct mtk_tphy {
struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
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 */
@@ -629,6 +635,10 @@ 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);
+
tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG0);
tmp &= ~(P3A_RG_XTAL_EXT_PE1H | P3A_RG_XTAL_EXT_PE2H);
tmp |= P3A_RG_XTAL_EXT_PE1H_VAL(0x2) | P3A_RG_XTAL_EXT_PE2H_VAL(0x2);
@@ -1114,6 +1124,16 @@ static int mtk_tphy_probe(struct platfor
&tphy->src_ref_clk);
device_property_read_u32(dev, "mediatek,src-coef", &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;