Drop digital thermometer and thermostat (DTT) drivers

[u-boot] / drivers / hwmon / ds1621.c

diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
deleted file mode 100644 (file)
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);
-}