diff options
Diffstat (limited to 'driver/temp_sensor/f75303.c')
| -rw-r--r-- | driver/temp_sensor/f75303.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/driver/temp_sensor/f75303.c b/driver/temp_sensor/f75303.c new file mode 100644 index 0000000000..61d672a7bd --- /dev/null +++ b/driver/temp_sensor/f75303.c @@ -0,0 +1,63 @@ +/* Copyright 2018 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. + */ + +/* F75303 temperature sensor module for Chrome EC */ + +#include "common.h" +#include "f75303.h" +#include "i2c.h" +#include "hooks.h" +#include "util.h" + +static int temp_val_local; +static int temp_val_remote1; + +/** + * Read 8 bits register from temp sensor. + */ +static int raw_read8(const int offset, int *data_ptr) +{ + return i2c_read8(I2C_PORT_THERMAL, F75303_I2C_ADDR, offset, data_ptr); +} + +static int get_temp(const int offset, int *temp_ptr) +{ + int rv; + int temp_raw = 0; + + rv = raw_read8(offset, &temp_raw); + if (rv != 0) + return rv; + + *temp_ptr = temp_raw; + return EC_SUCCESS; +} + +int f75303_get_val(int idx, int *temp_ptr) +{ + switch (idx) { + case F75303_IDX_LOCAL: + *temp_ptr = temp_val_local; + break; + case F75303_IDX_REMOTE: + *temp_ptr = temp_val_remote1; + break; + default: + return EC_ERROR_UNKNOWN; + } + + return EC_SUCCESS; +} + +static void f75303_sensor_poll(void) +{ + get_temp(F75303_TEMP_LOCAL, &temp_val_local); + temp_val_local = C_TO_K(temp_val_local); + + get_temp(F75303_TEMP_REMOTE, &temp_val_remote1); + temp_val_remote1 = C_TO_K(temp_val_remote1); +} +DECLARE_HOOK(HOOK_SECOND, f75303_sensor_poll, HOOK_PRIO_TEMP_SENSOR); + |