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usb: dwc3: Add support for usb3-phy PHY configuration 

When usb3-phy label is found, PHY driver is called and serdes line is
initialized. This is preparation for serdes/psgtr driver to configure GT
lines based on description in DT.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2022-03-09 10:05:45 +01:00 committed by Marek Vasut
parent e81782ab88
commit 142d50fbce
1 changed files with 18 additions and 0 deletions
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18
drivers/usb/dwc3/dwc3-generic.c
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@ -14,6 +14,7 @@
#include <dm/device-internal.h> #include <dm/device-internal.h>
#include <dm/lists.h> #include <dm/lists.h>
#include <dwc3-uboot.h> #include <dwc3-uboot.h>
#include <generic-phy.h>
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/usb/ch9.h> #include <linux/usb/ch9.h>
@ -409,6 +410,17 @@ static int dwc3_glue_probe(struct udevice *dev)
struct udevice *child = NULL; struct udevice *child = NULL;
int index = 0; int index = 0;
int ret; int ret;
struct phy phy;
ret = generic_phy_get_by_name(dev, "usb3-phy", &phy);
if (!ret) {
ret = generic_phy_init(&phy);
if (ret)
return ret;
} else if (ret != -ENOENT) {
debug("could not get phy (err %d)\n", ret);
return ret;
}
glue->regs = dev_read_addr(dev); glue->regs = dev_read_addr(dev);
@ -420,6 +432,12 @@ static int dwc3_glue_probe(struct udevice *dev)
if (ret) if (ret)
return ret; return ret;
if (phy.dev) {
ret = generic_phy_power_on(&phy);
if (ret)
return ret;
}
ret = device_find_first_child(dev, &child); ret = device_find_first_child(dev, &child);
if (ret) if (ret)
return ret; return ret;