openwrt/target/linux/generic/backport-5.15/346-v5.18-02-Revert-usb-host-xhci-mvebu-make-USB-3.0-PHY-optional.patch

From 8e10548f7f4814e530857d2049d6af6bc78add53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Thu, 3 Feb 2022 22:44:43 +0100
Subject: [PATCH 2/3] Revert "usb: host: xhci: mvebu: make USB 3.0 PHY optional
 for Armada 3720"
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This reverts commit 3241929b67d28c83945d3191c6816a3271fd6b85.

Armada 3720 phy driver (phy-mvebu-a3700-comphy.c) does not return
-EOPNOTSUPP from phy_power_on() callback anymore.

So remove XHCI_SKIP_PHY_INIT flag from xhci_mvebu_a3700_plat_setup() and
then also whole xhci_mvebu_a3700_plat_setup() function which is there just
to handle -EOPNOTSUPP for XHCI_SKIP_PHY_INIT.

xhci plat_setup callback is not used by any other xhci plat driver, so
remove this callback completely.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220203214444.1508-5-kabel@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/usb/host/xhci-mvebu.c | 42 -----------------------------------
 drivers/usb/host/xhci-mvebu.h |  6 -----
 drivers/usb/host/xhci-plat.c  | 20 +----------------
 drivers/usb/host/xhci-plat.h  |  1 -
 4 files changed, 1 insertion(+), 68 deletions(-)

--- a/drivers/usb/host/xhci-mvebu.c
+++ b/drivers/usb/host/xhci-mvebu.c
@@ -8,7 +8,6 @@
 #include <linux/mbus.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
-#include <linux/phy/phy.h>
 
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
@@ -74,47 +73,6 @@ int xhci_mvebu_mbus_init_quirk(struct us
 
 	return 0;
 }
-
-int xhci_mvebu_a3700_plat_setup(struct usb_hcd *hcd)
-{
-	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-	struct device *dev = hcd->self.controller;
-	struct phy *phy;
-	int ret;
-
-	/* Old bindings miss the PHY handle */
-	phy = of_phy_get(dev->of_node, "usb3-phy");
-	if (IS_ERR(phy) && PTR_ERR(phy) == -EPROBE_DEFER)
-		return -EPROBE_DEFER;
-	else if (IS_ERR(phy))
-		goto phy_out;
-
-	ret = phy_init(phy);
-	if (ret)
-		goto phy_put;
-
-	ret = phy_set_mode(phy, PHY_MODE_USB_HOST_SS);
-	if (ret)
-		goto phy_exit;
-
-	ret = phy_power_on(phy);
-	if (ret == -EOPNOTSUPP) {
-		/* Skip initializatin of XHCI PHY when it is unsupported by firmware */
-		dev_warn(dev, "PHY unsupported by firmware\n");
-		xhci->quirks |= XHCI_SKIP_PHY_INIT;
-	}
-	if (ret)
-		goto phy_exit;
-
-	phy_power_off(phy);
-phy_exit:
-	phy_exit(phy);
-phy_put:
-	of_phy_put(phy);
-phy_out:
-
-	return 0;
-}
 
 int xhci_mvebu_a3700_init_quirk(struct usb_hcd *hcd)
 {
--- a/drivers/usb/host/xhci-mvebu.h
+++ b/drivers/usb/host/xhci-mvebu.h
@@ -12,18 +12,12 @@ struct usb_hcd;
 
 #if IS_ENABLED(CONFIG_USB_XHCI_MVEBU)
 int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd);
-int xhci_mvebu_a3700_plat_setup(struct usb_hcd *hcd);
 int xhci_mvebu_a3700_init_quirk(struct usb_hcd *hcd);
 #else
 static inline int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
 {
 	return 0;
 }
-
-static inline int xhci_mvebu_a3700_plat_setup(struct usb_hcd *hcd)
-{
-	return 0;
-}
 
 static inline int xhci_mvebu_a3700_init_quirk(struct usb_hcd *hcd)
 {
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -44,16 +44,6 @@ static void xhci_priv_plat_start(struct
 		priv->plat_start(hcd);
 }
 
-static int xhci_priv_plat_setup(struct usb_hcd *hcd)
-{
-	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
-
-	if (!priv->plat_setup)
-		return 0;
-
-	return priv->plat_setup(hcd);
-}
-
 static int xhci_priv_init_quirk(struct usb_hcd *hcd)
 {
 	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
@@ -121,7 +111,6 @@ static const struct xhci_plat_priv xhci_
 };
 
 static const struct xhci_plat_priv xhci_plat_marvell_armada3700 = {
-	.plat_setup = xhci_mvebu_a3700_plat_setup,
 	.init_quirk = xhci_mvebu_a3700_init_quirk,
 };
 
@@ -344,14 +333,7 @@ static int xhci_plat_probe(struct platfo
 
 	hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
 	xhci->shared_hcd->tpl_support = hcd->tpl_support;
-
-	if (priv) {
-		ret = xhci_priv_plat_setup(hcd);
-		if (ret)
-			goto disable_usb_phy;
-	}
-
-	if ((xhci->quirks & XHCI_SKIP_PHY_INIT) || (priv && (priv->quirks & XHCI_SKIP_PHY_INIT)))
+	if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
 		hcd->skip_phy_initialization = 1;
 
 	if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK))
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -15,7 +15,6 @@ struct usb_hcd;
 struct xhci_plat_priv {
 	const char *firmware_name;
 	unsigned long long quirks;
-	int (*plat_setup)(struct usb_hcd *);
 	void (*plat_start)(struct usb_hcd *);
 	int (*init_quirk)(struct usb_hcd *);
 	int (*suspend_quirk)(struct usb_hcd *);