diff options
Diffstat (limited to 'drivers/hwmon/lm63.c')
-rw-r--r-- | drivers/hwmon/lm63.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c deleted file mode 100644 index 053c785..0000000 --- a/drivers/hwmon/lm63.c +++ /dev/null @@ -1,160 +0,0 @@ -/* - * (C) Copyright 2007-2008 - * Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de - * based on lm75.c by Bill Hunter - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * National LM63/LM64 Temperature Sensor - * Main difference: LM 64 has -16 Kelvin temperature offset - */ - -#include <common.h> -#include <i2c.h> -#include <dtt.h> - -#define DTT_I2C_LM63_ADDR 0x4C /* National LM63 device */ - -#define DTT_READ_TEMP_RMT_MSB 0x01 -#define DTT_CONFIG 0x03 -#define DTT_READ_TEMP_RMT_LSB 0x10 -#define DTT_TACHLIM_LSB 0x48 -#define DTT_TACHLIM_MSB 0x49 -#define DTT_FAN_CONFIG 0x4A -#define DTT_PWM_FREQ 0x4D -#define DTT_PWM_LOOKUP_BASE 0x50 - -struct pwm_lookup_entry { - u8 temp; - u8 pwm; -}; - -/* - * Device code - */ - -int dtt_read(int sensor, int reg) -{ - int dlen; - uchar data[2]; - - /* - * Calculate sensor address and register. - */ - if (!sensor) - sensor = DTT_I2C_LM63_ADDR; /* legacy config */ - - dlen = 1; - - /* - * Now try to read the register. - */ - if (i2c_read(sensor, reg, 1, data, dlen) != 0) - return -1; - - return (int)data[0]; -} /* dtt_read() */ - -int dtt_write(int sensor, int reg, int val) -{ - int dlen; - uchar data[2]; - - /* - * Calculate sensor address and register. - */ - if (!sensor) - sensor = DTT_I2C_LM63_ADDR; /* legacy config */ - - dlen = 1; - data[0] = (char)(val & 0xff); - - /* - * Write value to register. - */ - if (i2c_write(sensor, reg, 1, data, dlen) != 0) - return 1; - - return 0; -} /* dtt_write() */ - -static int is_lm64(int sensor) -{ - return sensor && (sensor != DTT_I2C_LM63_ADDR); -} - -int dtt_init_one(int sensor) -{ - int i; - int val; - - struct pwm_lookup_entry pwm_lookup[] = CONFIG_DTT_PWM_LOOKUPTABLE; - - /* - * Set PWM Frequency to 2.5% resolution - */ - val = 20; - if (dtt_write(sensor, DTT_PWM_FREQ, val) != 0) - return 1; - - /* - * Set Tachometer Limit - */ - val = CONFIG_DTT_TACH_LIMIT; - if (dtt_write(sensor, DTT_TACHLIM_LSB, val & 0xff) != 0) - return 1; - if (dtt_write(sensor, DTT_TACHLIM_MSB, (val >> 8) & 0xff) != 0) - return 1; - - /* - * Make sure PWM Lookup-Table is writeable - */ - if (dtt_write(sensor, DTT_FAN_CONFIG, 0x20) != 0) - return 1; - - /* - * Setup PWM Lookup-Table - */ - for (i = 0; i < ARRAY_SIZE(pwm_lookup); i++) { - int address = DTT_PWM_LOOKUP_BASE + 2 * i; - val = pwm_lookup[i].temp; - if (is_lm64(sensor)) - val -= 16; - if (dtt_write(sensor, address, val) != 0) - return 1; - val = dtt_read(sensor, address); - val = pwm_lookup[i].pwm; - if (dtt_write(sensor, address + 1, val) != 0) - return 1; - } - - /* - * Enable PWM Lookup-Table, PWM Clock 360 kHz, Tachometer Mode 2 - */ - val = 0x02; - if (dtt_write(sensor, DTT_FAN_CONFIG, val) != 0) - return 1; - - /* - * Enable Tach input - */ - val = dtt_read(sensor, DTT_CONFIG) | 0x04; - if (dtt_write(sensor, DTT_CONFIG, val) != 0) - return 1; - - return 0; -} - -int dtt_get_temp(int sensor) -{ - s16 temp = (dtt_read(sensor, DTT_READ_TEMP_RMT_MSB) << 8) - | (dtt_read(sensor, DTT_READ_TEMP_RMT_LSB)); - - if (is_lm64(sensor)) - temp += 16 << 8; - - /* Ignore LSB for now, U-Boot only prints natural numbers */ - return temp >> 8; -} |