drivers/phy/phy-ab8500-usb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Copyright (C) 2019 Stephan Gerhold */
   3
   4 #include <common.h>
   5 #include <dm.h>
   6 #include <generic-phy.h>
   7 #include <linux/bitops.h>
   8 #include <power/pmic.h>
   9 #include <power/ab8500.h>
  10
  11 #define AB8500_USB_PHY_CTRL_REG                 AB8500_USB(0x8A)
  12 #define AB8500_BIT_PHY_CTRL_HOST_EN             BIT(0)
  13 #define AB8500_BIT_PHY_CTRL_DEVICE_EN           BIT(1)
  14 #define AB8500_USB_PHY_CTRL_MASK                (AB8500_BIT_PHY_CTRL_HOST_EN |\
  15                                                  AB8500_BIT_PHY_CTRL_DEVICE_EN)
  16
  17 static int ab8500_usb_phy_power_on(struct phy *phy)
  18 {
  19         struct udevice *dev = phy->dev;
  20         uint set = AB8500_BIT_PHY_CTRL_DEVICE_EN;
  21
  22         if (IS_ENABLED(CONFIG_USB_MUSB_HOST))
  23                 set = AB8500_BIT_PHY_CTRL_HOST_EN;
  24
  25         return pmic_clrsetbits(dev->parent, AB8500_USB_PHY_CTRL_REG,
  26                                AB8500_USB_PHY_CTRL_MASK, set);
  27 }
  28
  29 static int ab8500_usb_phy_power_off(struct phy *phy)
  30 {
  31         struct udevice *dev = phy->dev;
  32
  33         return pmic_clrsetbits(dev->parent, AB8500_USB_PHY_CTRL_REG,
  34                                AB8500_USB_PHY_CTRL_MASK, 0);
  35 }
  36
  37 struct phy_ops ab8500_usb_phy_ops = {
  38         .power_on = ab8500_usb_phy_power_on,
  39         .power_off = ab8500_usb_phy_power_off,
  40 };
  41
  42 static const struct udevice_id ab8500_usb_phy_ids[] = {
  43         { .compatible = "stericsson,ab8500-usb" },
  44         { }
  45 };
  46
  47 U_BOOT_DRIVER(ab8500_usb_phy) = {
  48         .name = "ab8500_usb_phy",
  49         .id = UCLASS_PHY,
  50         .of_match = ab8500_usb_phy_ids,
  51         .ops = &ab8500_usb_phy_ops,
  52 };