1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2014 Google Inc.
4 * Copyright (C) 2016 Intel Corporation.
5 */
6
7Device (TCHG)
8{
9	Name (_HID, "INT3403")
10	Name (_UID, 0)
11	Name (PTYP, 0x0B)
12	Name (_STR, Unicode("Battery Charger"))
13
14	Method (_STA)
15	{
16		If (LEqual (\DPTE, One)) {
17			Return (0xF)
18		} Else {
19			Return (0x0)
20		}
21	}
22
23	/* Return charger performance states defined by mainboard */
24	Method (PPSS)
25	{
26		Return (\_SB.CHPS)
27	}
28
29	/* Return maximum charger current limit */
30	Method (PPPC)
31	{
32		/* Convert size of PPSS table to index */
33		Store (SizeOf (\_SB.CHPS), Local0)
34		Decrement (Local0)
35
36		/* Check if charging is disabled (AC removed) */
37		If (LEqual (\_SB.PCI0.LPCB.EC0.ACEX, Zero)) {
38			/* Return last power state */
39			Return (Local0)
40		} Else {
41			/* Return highest power state */
42			Return (0)
43		}
44
45		Return (0)
46	}
47
48	/* Set charger current limit */
49	Method (SPPC, 1)
50	{
51		/* Retrieve Control (index 4) for specified PPSS level */
52		Store (DeRefOf (Index (DeRefOf (Index
53			(\_SB.CHPS, ToInteger (Arg0))), 4)), Local0)
54
55		/* Pass Control value to EC to limit charging */
56		\_SB.PCI0.LPCB.EC0.CHGS (Local0)
57	}
58
59	/* Initialize charger participant */
60	Method (INIT)
61	{
62		/* Disable charge limit */
63		\_SB.PCI0.LPCB.EC0.CHGD ()
64	}
65}
66