diff options
Diffstat (limited to 'drivers/hwmon/lm73.c')
-rw-r--r-- | drivers/hwmon/lm73.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c deleted file mode 100644 index c15c7514d86..00000000000 --- a/drivers/hwmon/lm73.c +++ /dev/null @@ -1,146 +0,0 @@ -/* - * (C) Copyright 2007-2008 - * Larry Johnson, lrj@acm.org - * - * based on dtt/lm75.c which is ... - * - * (C) Copyright 2001 - * Bill Hunter, Wave 7 Optics, williamhunter@mediaone.net - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * National Semiconductor LM73 Temperature Sensor - */ - -#include <common.h> -#include <i2c.h> -#include <dtt.h> - -/* - * Device code - */ -#define DTT_I2C_DEV_CODE 0x48 /* National Semi's LM73 device */ -#define DTT_READ_TEMP 0x0 -#define DTT_CONFIG 0x1 -#define DTT_TEMP_HIGH 0x2 -#define DTT_TEMP_LOW 0x3 -#define DTT_CONTROL 0x4 -#define DTT_ID 0x7 - -int dtt_read(int const sensor, int const reg) -{ - int dlen; - uint8_t data[2]; - - /* - * Validate 'reg' param and get register size. - */ - switch (reg) { - case DTT_CONFIG: - case DTT_CONTROL: - dlen = 1; - break; - case DTT_READ_TEMP: - case DTT_TEMP_HIGH: - case DTT_TEMP_LOW: - case DTT_ID: - dlen = 2; - break; - default: - return -1; - } - /* - * Try to read the register at the calculated sensor address. - */ - if (0 != - i2c_read(DTT_I2C_DEV_CODE + (sensor & 0x07), reg, 1, data, dlen)) - return -1; - /* - * Handle 2 byte result. - */ - if (2 == dlen) - return (int)((unsigned)data[0] << 8 | (unsigned)data[1]); - - return (int)data[0]; -} /* dtt_read() */ - -int dtt_write(int const sensor, int const reg, int const val) -{ - int dlen; - uint8_t data[2]; - - /* - * Validate 'reg' param and handle register size - */ - switch (reg) { - case DTT_CONFIG: - case DTT_CONTROL: - dlen = 1; - data[0] = (uint8_t) val; - break; - case DTT_TEMP_HIGH: - case DTT_TEMP_LOW: - dlen = 2; - data[0] = (uint8_t) (val >> 8); /* MSB first */ - data[1] = (uint8_t) val; - break; - default: - return -1; - } - /* - * Write value to register at the calculated sensor address. - */ - return 0 != i2c_write(DTT_I2C_DEV_CODE + (sensor & 0x07), reg, 1, data, - dlen); -} /* dtt_write() */ - -int dtt_init_one(int const sensor) -{ - int val; - - /* - * Validate the Identification register - */ - if (0x0190 != dtt_read(sensor, DTT_ID)) - return -1; - /* - * Setup THIGH (upper-limit) and TLOW (lower-limit) registers - */ - val = CONFIG_SYS_DTT_MAX_TEMP << 7; - if (dtt_write(sensor, DTT_TEMP_HIGH, val)) - return -1; - - val = CONFIG_SYS_DTT_MIN_TEMP << 7; - if (dtt_write(sensor, DTT_TEMP_LOW, val)) - return -1; - /* - * Setup configuraton register - */ - /* config = alert active low, disabled, and reset */ - val = 0x64; - if (dtt_write(sensor, DTT_CONFIG, val)) - return -1; - /* - * Setup control/status register - */ - /* control = temp resolution 0.25C */ - val = 0x00; - if (dtt_write(sensor, DTT_CONTROL, val)) - return -1; - - dtt_read(sensor, DTT_CONTROL); /* clear temperature flags */ - return 0; -} /* dtt_init_one() */ - -int dtt_get_temp(int const sensor) -{ - int const ret = dtt_read(sensor, DTT_READ_TEMP); - - if (ret < 0) { - printf("DTT temperature read failed.\n"); - return 0; - } - return (int)((int16_t) ret + 0x0040) >> 7; -} /* dtt_get_temp() */ |