diff options
| author | Edward Hill <ecgh@chromium.org> | 2020-05-04 19:44:49 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-05-05 05:51:26 +0000 |
| commit | af09e1bdd78924850fd6f1c188c9203c77757153 (patch) | |
| tree | d96e77265566d50845815bd49d534d03e1389687 /driver/retimer | |
| parent | 773db9a931ccc9ee591c04a6c610a805d74bdad8 (diff) | |
| download | chrome-ec-af09e1bdd78924850fd6f1c188c9203c77757153.tar.gz | |
pi3hdx1204: Add driver.
Add simple driver to just turn power on and off via I2C.
BUG=b:154874071
BRANCH=none
TEST=check i2c writes
Signed-off-by: Edward Hill <ecgh@chromium.org>
Change-Id: I836340dbd7a9e41380d1469dac0a94e268bd2bf6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2181793
Reviewed-by: Denis Brockus <dbrockus@chromium.org>
Commit-Queue: Denis Brockus <dbrockus@chromium.org>
Diffstat (limited to 'driver/retimer')
| -rw-r--r-- | driver/retimer/pi3hdx1204.c | 23 | ||||
| -rw-r--r-- | driver/retimer/pi3hdx1204.h | 22 |
2 files changed, 45 insertions, 0 deletions
diff --git a/driver/retimer/pi3hdx1204.c b/driver/retimer/pi3hdx1204.c new file mode 100644 index 0000000000..30db590c61 --- /dev/null +++ b/driver/retimer/pi3hdx1204.c @@ -0,0 +1,23 @@ +/* Copyright 2020 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * PI3HDX1204 retimer. + */ + +#include "i2c.h" +#include "pi3hdx1204.h" + +int pi3hdx1204_enable(const int i2c_port, + const uint16_t i2c_addr_flags, + const int enable) +{ + uint8_t buf[PI3HDX1204_ENABLE_OFFSET + 1] = {0}; + + buf[PI3HDX1204_ENABLE_OFFSET] = + enable ? PI3HDX1204_ENABLE_ALL_CHANNELS : 0; + + return i2c_xfer(i2c_port, i2c_addr_flags, + buf, PI3HDX1204_ENABLE_OFFSET + 1, + NULL, 0); +} diff --git a/driver/retimer/pi3hdx1204.h b/driver/retimer/pi3hdx1204.h new file mode 100644 index 0000000000..4ae9eeaa3b --- /dev/null +++ b/driver/retimer/pi3hdx1204.h @@ -0,0 +1,22 @@ +/* Copyright 2020 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * PI3HDX1204 retimer. + */ + +#ifndef __CROS_EC_USB_RETIMER_PI3HDX1204_H +#define __CROS_EC_USB_RETIMER_PI3HDX1204_H + +#define PI3HDX1204_I2C_ADDR_FLAGS 0x60 + +/* Register Offset 2 - Enable */ +#define PI3HDX1204_ENABLE_OFFSET 2 +#define PI3HDX1204_ENABLE_ALL_CHANNELS 0xF0 + +/* Enable or disable the PI3HDX1204. */ +int pi3hdx1204_enable(const int i2c_port, + const uint16_t i2c_addr_flags, + const int enable); + +#endif /* __CROS_EC_USB_RETIMER_PI3HDX1204_H */ |