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usb: dwc3: Add support to reset usb ULPI phy

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When usb PHY initialization is done, the PHY need to be reset.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
T Karthik Reddy 2022-07-08 11:21:59 +02:00 committed by Marek Vasut
parent f36479e302
commit b252d79b09
1 changed files with 30 additions and 0 deletions
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30
drivers/usb/dwc3/dwc3-generic.c
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@ -26,6 +26,7 @@
#include <reset.h> #include <reset.h>
#include <clk.h> #include <clk.h>
#include <usb/xhci.h> #include <usb/xhci.h>
#include <asm/gpio.h>
struct dwc3_glue_data { struct dwc3_glue_data {
struct clk_bulk clks; struct clk_bulk clks;
@ -43,6 +44,7 @@ struct dwc3_generic_priv {
void *base; void *base;
struct dwc3 dwc3; struct dwc3 dwc3;
struct phy_bulk phys; struct phy_bulk phys;
struct gpio_desc ulpi_reset;
}; };
struct dwc3_generic_host_priv { struct dwc3_generic_host_priv {
@ -78,6 +80,27 @@ static int dwc3_generic_probe(struct udevice *dev,
if (rc && rc != -ENOTSUPP) if (rc && rc != -ENOTSUPP)
return rc; return rc;
if (CONFIG_IS_ENABLED(DM_GPIO) &&
device_is_compatible(dev->parent, "xlnx,zynqmp-dwc3")) {
rc = gpio_request_by_name(dev->parent, "reset-gpios", 0,
&priv->ulpi_reset, GPIOD_ACTIVE_LOW);
if (rc)
return rc;
/* Toggle ulpi to reset the phy. */
rc = dm_gpio_set_value(&priv->ulpi_reset, 1);
if (rc)
return rc;
mdelay(5);
rc = dm_gpio_set_value(&priv->ulpi_reset, 0);
if (rc)
return rc;
mdelay(5);
}
if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3")) if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3"))
reset_deassert_bulk(&glue->resets); reset_deassert_bulk(&glue->resets);
@ -99,6 +122,13 @@ static int dwc3_generic_remove(struct udevice *dev,
{ {
struct dwc3 *dwc3 = &priv->dwc3; struct dwc3 *dwc3 = &priv->dwc3;
if (CONFIG_IS_ENABLED(DM_GPIO) &&
device_is_compatible(dev->parent, "xlnx,zynqmp-dwc3")) {
struct gpio_desc *ulpi_reset = &priv->ulpi_reset;
dm_gpio_free(ulpi_reset->dev, ulpi_reset);
}
dwc3_remove(dwc3); dwc3_remove(dwc3);
dwc3_shutdown_phy(dev, &priv->phys); dwc3_shutdown_phy(dev, &priv->phys);
unmap_physmem(dwc3->regs, MAP_NOCACHE); unmap_physmem(dwc3->regs, MAP_NOCACHE);