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Diffstat (limited to 'drivers/hwmon/ds1621.c')
-rw-r--r--drivers/hwmon/ds1621.c155
1 files changed, 0 insertions, 155 deletions
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
deleted file mode 100644
index 66947a6..0000000
--- a/drivers/hwmon/ds1621.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * (C) Copyright 2001
- * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/*
- * Dallas Semiconductor's DS1621/1631 Digital Thermometer and Thermostat.
- */
-
-#include <common.h>
-#include <i2c.h>
-#include <dtt.h>
-
-/*
- * Device code
- */
-#define DTT_I2C_DEV_CODE 0x48 /* Dallas Semi's DS1621 */
-#define DTT_READ_TEMP 0xAA
-#define DTT_READ_COUNTER 0xA8
-#define DTT_READ_SLOPE 0xA9
-#define DTT_WRITE_START_CONV 0xEE
-#define DTT_WRITE_STOP_CONV 0x22
-#define DTT_TEMP_HIGH 0xA1
-#define DTT_TEMP_LOW 0xA2
-#define DTT_CONFIG 0xAC
-
-/*
- * Config register bits
- */
-#define DTT_CONFIG_1SHOT 0x01
-#define DTT_CONFIG_POLARITY 0x02
-#define DTT_CONFIG_R0 0x04 /* ds1631 only */
-#define DTT_CONFIG_R1 0x08 /* ds1631 only */
-#define DTT_CONFIG_NVB 0x10
-#define DTT_CONFIG_TLF 0x20
-#define DTT_CONFIG_THF 0x40
-#define DTT_CONFIG_DONE 0x80
-
-
-int dtt_read(int sensor, int reg)
-{
- int dlen;
- uchar data[2];
-
- /* Calculate sensor address and command */
- sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); /* Calculate addr of ds1621*/
-
- /* Prepare to handle 2 byte result */
- switch(reg) {
- case DTT_READ_TEMP:
- case DTT_TEMP_HIGH:
- case DTT_TEMP_LOW:
- dlen = 2;
- break;
- default:
- dlen = 1;
- }
-
- /* Now try to read the register */
- if (i2c_read(sensor, reg, 1, data, dlen) != 0)
- return 1;
-
- /* Handle 2 byte result */
- if (dlen == 2)
- return (short)((data[0] << 8) | data[1]);
-
- return (int)data[0];
-}
-
-
-int dtt_write(int sensor, int reg, int val)
-{
- int dlen;
- uchar data[2];
-
- /* Calculate sensor address and register */
- sensor = DTT_I2C_DEV_CODE + (sensor & 0x07);
-
- /* Handle various data sizes. */
- switch(reg) {
- case DTT_READ_TEMP:
- case DTT_TEMP_HIGH:
- case DTT_TEMP_LOW:
- dlen = 2;
- data[0] = (char)((val >> 8) & 0xff); /* MSB first */
- data[1] = (char)(val & 0xff);
- break;
- case DTT_WRITE_START_CONV:
- case DTT_WRITE_STOP_CONV:
- dlen = 0;
- data[0] = (char)0;
- data[1] = (char)0;
- break;
- default:
- dlen = 1;
- data[0] = (char)(val & 0xff);
- }
-
- /* Write value to device */
- if (i2c_write(sensor, reg, 1, data, dlen) != 0)
- return 1;
-
- /* Poll NV memory busy bit in case write was to register stored in EEPROM */
- while(i2c_reg_read(sensor, DTT_CONFIG) & DTT_CONFIG_NVB)
- ;
-
- return 0;
-}
-
-
-int dtt_init_one(int sensor)
-{
- int val;
-
- /* Setup High Temp */
- val = ((CONFIG_SYS_DTT_MAX_TEMP * 2) << 7) & 0xff80;
- if (dtt_write(sensor, DTT_TEMP_HIGH, val) != 0)
- return 1;
-
- /* Setup Low Temp - hysteresis */
- val = (((CONFIG_SYS_DTT_MAX_TEMP - CONFIG_SYS_DTT_HYSTERESIS) * 2) << 7) & 0xff80;
- if (dtt_write(sensor, DTT_TEMP_LOW, val) != 0)
- return 1;
-
- /*
- * Setup configuraton register
- *
- * Clear THF & TLF, Reserved = 1, Polarity = Active Low, One Shot = YES
- *
- * We run in polled mode, since there isn't any way to know if this
- * lousy device is ready to provide temperature readings on power up.
- */
- val = 0x9;
- if (dtt_write(sensor, DTT_CONFIG, val) != 0)
- return 1;
-
- return 0;
-}
-
-int dtt_get_temp(int sensor)
-{
- int i;
-
- /* Start a conversion, may take up to 1 second. */
- dtt_write(sensor, DTT_WRITE_START_CONV, 0);
- for (i = 0; i <= 10; i++) {
- udelay(100000);
- if (dtt_read(sensor, DTT_CONFIG) & DTT_CONFIG_DONE)
- break;
- }
-
- return (dtt_read(sensor, DTT_READ_TEMP) / 256);
-}