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Subject[PATCH v2 1/3] usb: host: npcm7xx: remove USB EHCI host reset sequence
Date
Remove USB EHCI host controller reset sequence from NPCM7XX USB EHCI
host probe function because it is done in the NPCM reset driver.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
drivers/usb/host/ehci-npcm7xx.c | 50 ---------------------------------
1 file changed, 50 deletions(-)

diff --git a/drivers/usb/host/ehci-npcm7xx.c b/drivers/usb/host/ehci-npcm7xx.c
index 6b5a7a873e01..1d2e2c3c0bf0 100644
--- a/drivers/usb/host/ehci-npcm7xx.c
+++ b/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;

--
2.33.0
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