| Simon Glass | ca75c3f | 2020-09-22 12:44:49 -0600 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Copyright (C) 2014 Google Inc. |
| 4 | * Copyright (C) 2016 Intel Corporation. |
| 5 | */ |
| 6 | |
| 7 | Device (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 | } |