Drop digital thermometer and thermostat (DTT) drivers

This subsystem is quite old. It has been replaced with a driver-model
version (UCLASS_THERMAL). Boards are free to convert to that if required,
but here is a removal patch that could be applied in the meantime.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>

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);
-}