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

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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.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomer Maimon 2022-07-18 21:18:40 +03:00 committed by Greg Kroah-Hartman
parent ad57410d23
commit 7ebfdfa08f
1 changed files with 0 additions and 50 deletions
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50
drivers/usb/host/ehci-npcm7xx.c
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@ -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;