Add vbus-supply regulator support. On some board vbus is not controlled by the phy but by an external regulator.
Signed-off-by: Patrice Chotard patrice.chotard@st.com ---
Changes in v2: - Add test on device_get_supply_regulator() call
drivers/usb/host/ehci-generic.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/ehci-generic.c b/drivers/usb/host/ehci-generic.c index 5a56f66cfaa6..ad926d05ac3e 100644 --- a/drivers/usb/host/ehci-generic.c +++ b/drivers/usb/host/ehci-generic.c @@ -11,6 +11,7 @@ #include <asm/io.h> #include <dm.h> #include "ehci.h" +#include <power/regulator.h>
/* * Even though here we don't explicitly use "struct ehci_ctrl" @@ -22,6 +23,9 @@ struct generic_ehci { struct clk *clocks; struct reset_ctl *resets; struct phy phy; +#ifdef CONFIG_DM_REGULATOR + struct udevice *vbus_supply; +#endif int clock_count; int reset_count; }; @@ -145,10 +149,27 @@ static int ehci_usb_probe(struct udevice *dev) } }
- err = ehci_setup_phy(dev, 0); +#ifdef CONFIG_DM_REGULATOR + err = device_get_supply_regulator(dev, "vbus-supply", + &priv->vbus_supply); if (err) goto reset_err;
+ if (priv->vbus_supply) { + err = regulator_set_enable(priv->vbus_supply, true); + if (err) { + pr_err("Error enabling VBUS supply\n"); + goto reset_err; + } + } else { + debug("%s: No vbus supply\n", dev->name); + } +#endif + + err = ehci_setup_phy(dev, 0); + if (err) + goto regulator_err; + hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE); hcor = (struct ehci_hcor *)((uintptr_t)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); @@ -164,6 +185,15 @@ phy_err: if (ret) dev_err(dev, "failed to shutdown usb phy\n");
+regulator_err: +#ifdef CONFIG_DM_REGULATOR + if (priv->vbus_supply) { + ret = regulator_set_enable(priv->vbus_supply, false); + if (ret) + pr_err("Error disabling VBUS supply\n"); + } +#endif + reset_err: ret = reset_release_all(priv->resets, priv->reset_count); if (ret) @@ -189,6 +219,13 @@ static int ehci_usb_remove(struct udevice *dev) if (ret) return ret;
+#ifdef CONFIG_DM_REGULATOR + if (priv->vbus_supply) { + ret = regulator_set_enable(priv->vbus_supply, false); + if (ret) + return ret; + } +#endif ret = reset_release_all(priv->resets, priv->reset_count); if (ret) return ret;