From: Parth Pancholi <parth.pancholi@xxxxxxxxxxx> Some PCIe-to-USB controllers such as TI's TUSB73x0 3.0 xHCI host controller supports controlling the PWRONx polarity via the USB control register (E0h). Add support for device tree property ti,pwron-active-high which indicates PWRONx to be active high and configure the E0h register accordingly. This enables the software control for the TUSB73x0's PWRONx outputs with an inverted polarity from the default configuration which could be used as USB EN signals for the other hubs or devices. Signed-off-by: Parth Pancholi <parth.pancholi@xxxxxxxxxxx> Signed-off-by: Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx> --- v5:s/ti,tusb7320-pwron-active-high/ti,pwron-active-high/ v4: no changes v3: no changes v2: s/polarity-invert/active-high --- drivers/usb/host/xhci-pci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 91dccd25a551..39456ec268f5 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -641,6 +641,9 @@ int xhci_pci_common_probe(struct pci_dev *dev, const struct pci_device_id *id) dma_set_max_seg_size(&dev->dev, UINT_MAX); + if (device_property_read_bool(&dev->dev, "ti,pwron-active-high")) + pci_clear_and_set_config_dword(dev, 0xE0, 0, 1 << 22); + return 0; put_usb3_hcd: -- 2.39.5
