target/linux/layerscape/patches-5.4/820-usb-0003-usb-phy-show-USB-charger-type-for-user.patch

   1 From 8eaa50485af15a4e1cc0c7c04f5ce3916e712ae1 Mon Sep 17 00:00:00 2001
   2 From: Peter Chen <peter.chen@nxp.com>
   3 Date: Wed, 6 Nov 2019 17:24:29 +0800
   4 Subject: [PATCH] usb: phy: show USB charger type for user
   5
   6 Current USB charger framework only shows charger state for user, but the
   7 user may also need charger type for further use, add support for it.
   8
   9 Signed-off-by: Peter Chen <peter.chen@nxp.com>
  10 ---
  11  drivers/usb/phy/phy.c | 13 ++++++++++++-
  12  1 file changed, 12 insertions(+), 1 deletion(-)
  13
  14 --- a/drivers/usb/phy/phy.c
  15 +++ b/drivers/usb/phy/phy.c
  16 @@ -34,6 +34,14 @@ struct phy_devm {
  17         struct notifier_block *nb;
  18  };
  19
  20 +static const char *const usb_chger_type[] = {
  21 +       [UNKNOWN_TYPE]                  = "USB_CHARGER_UNKNOWN_TYPE",
  22 +       [SDP_TYPE]                      = "USB_CHARGER_SDP_TYPE",
  23 +       [CDP_TYPE]                      = "USB_CHARGER_CDP_TYPE",
  24 +       [DCP_TYPE]                      = "USB_CHARGER_DCP_TYPE",
  25 +       [ACA_TYPE]                      = "USB_CHARGER_ACA_TYPE",
  26 +};
  27 +
  28  static struct usb_phy *__usb_find_phy(struct list_head *list,
  29         enum usb_phy_type type)
  30  {
  31 @@ -98,7 +106,8 @@ static void usb_phy_notify_charger_work(
  32  {
  33         struct usb_phy *usb_phy = container_of(work, struct usb_phy, chg_work);
  34         char uchger_state[50] = { 0 };
  35 -       char *envp[] = { uchger_state, NULL };
  36 +       char uchger_type[50] = { 0 };
  37 +       char *envp[] = { uchger_state, uchger_type, NULL };
  38         unsigned int min, max;
  39
  40         switch (usb_phy->chg_state) {
  41 @@ -122,6 +131,8 @@ static void usb_phy_notify_charger_work(
  42                 return;
  43         }
  44
  45 +       snprintf(uchger_type, ARRAY_SIZE(uchger_type),
  46 +                "USB_CHARGER_TYPE=%s", usb_chger_type[usb_phy->chg_type]);
  47         kobject_uevent_env(&usb_phy->dev->kobj, KOBJ_CHANGE, envp);
  48  }
  49