Patrick Delaunay | fcb6b0b | 2020-06-29 10:34:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause |
| 2 | /* |
| 3 | * STMicroelectronics STUSB Type-C controller driver |
| 4 | * based on Linux drivers/usb/typec/stusb160x.c |
| 5 | * |
| 6 | * Copyright (C) 2020, STMicroelectronics - All Rights Reserved |
| 7 | */ |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <dm.h> |
| 11 | #include <i2c.h> |
| 12 | |
| 13 | /* REGISTER */ |
| 14 | #define STUSB160X_CC_CONNECTION_STATUS 0x0E |
| 15 | |
| 16 | /* STUSB160X_CC_CONNECTION_STATUS bitfields */ |
| 17 | #define STUSB160X_CC_ATTACH BIT(0) |
| 18 | |
| 19 | int stusb160x_cable_connected(void) |
| 20 | { |
| 21 | struct udevice *dev; |
| 22 | int ret; |
| 23 | |
| 24 | ret = uclass_get_device_by_driver(UCLASS_I2C_GENERIC, |
| 25 | DM_GET_DRIVER(stusb160x), |
| 26 | &dev); |
| 27 | if (ret < 0) |
| 28 | return ret; |
| 29 | |
| 30 | ret = dm_i2c_reg_read(dev, STUSB160X_CC_CONNECTION_STATUS); |
| 31 | if (ret < 0) |
| 32 | return 0; |
| 33 | |
| 34 | return ret & STUSB160X_CC_ATTACH; |
| 35 | } |
| 36 | |
| 37 | static const struct udevice_id stusb160x_ids[] = { |
| 38 | { .compatible = "st,stusb1600" }, |
| 39 | {} |
| 40 | }; |
| 41 | |
| 42 | U_BOOT_DRIVER(stusb160x) = { |
| 43 | .name = "stusb160x", |
| 44 | .id = UCLASS_I2C_GENERIC, |
| 45 | .of_match = stusb160x_ids, |
| 46 | }; |