usb: host: npcm7xx: remove USB EHCI host reset sequence

Remove USB EHCI host controller reset sequence from NPCM7XX USB EHCI
host probe function because it is done in the NPCM reset driver.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Link: https://lore.kernel.org/r/20220718181842.61040-2-tmaimon77@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-npcm7xx.c

@@ -22,19 +22,9 @@
 
 #include "ehci.h"
 
-#include <linux/regmap.h>
-#include <linux/mfd/syscon.h>
-
 #define DRIVER_DESC "EHCI npcm7xx driver"
 
 static const char hcd_name[] = "npcm7xx-ehci";
-
-#define  USB2PHYCTL_OFFSET 0x144
-
-#define  IPSRST2_OFFSET 0x24
-#define  IPSRST3_OFFSET 0x34
-
-
 static struct hc_driver __read_mostly ehci_npcm7xx_hc_driver;
 
 static int __maybe_unused ehci_npcm7xx_drv_suspend(struct device *dev)
@@ -60,52 +50,12 @@ static int npcm7xx_ehci_hcd_drv_probe(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd;
 	struct resource *res;
-	struct regmap *gcr_regmap;
-	struct regmap *rst_regmap;
 	const struct hc_driver *driver = &ehci_npcm7xx_hc_driver;
 	int irq;
 	int retval;
 
 	dev_dbg(&pdev->dev,	"initializing npcm7xx ehci USB Controller\n");
 
-	gcr_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gcr");
-	if (IS_ERR(gcr_regmap)) {
-		dev_err(&pdev->dev, "%s: failed to find nuvoton,npcm750-gcr\n",
-			__func__);
-		return PTR_ERR(gcr_regmap);
-	}
-
-	rst_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-rst");
-	if (IS_ERR(rst_regmap)) {
-		dev_err(&pdev->dev, "%s: failed to find nuvoton,npcm750-rst\n",
-			__func__);
-		return PTR_ERR(rst_regmap);
-	}
-
-	/********* phy init  ******/
-	// reset usb host
-	regmap_update_bits(rst_regmap, IPSRST2_OFFSET,
-			(0x1 << 26), (0x1 << 26));
-	regmap_update_bits(rst_regmap, IPSRST3_OFFSET,
-			(0x1 << 25), (0x1 << 25));
-	regmap_update_bits(gcr_regmap, USB2PHYCTL_OFFSET,
-			(0x1 << 28), 0);
-
-	udelay(1);
-
-	// enable phy
-	regmap_update_bits(rst_regmap, IPSRST3_OFFSET,
-			(0x1 << 25), 0);
-
-	udelay(50); // enable phy
-
-	regmap_update_bits(gcr_regmap, USB2PHYCTL_OFFSET,
-			(0x1 << 28), (0x1 << 28));
-
-	// enable host
-	regmap_update_bits(rst_regmap, IPSRST2_OFFSET,
-			(0x1 << 26), 0);
-
 	if (usb_disabled())
 		return -ENODEV;