Commit 24d528e3fa3a8370aa5263592c362b7d61642340
Committed by
Albert ARIBAUD
Albert ARIBAUD
1 parent
981219eebe
Exists in
v2017.01-smarct4x
and in
37 other branches
dtt: add ds620 support
Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
Showing 3 changed files with 74 additions and 7 deletions Side-by-side Diff
drivers/hwmon/Makefile
| ... | ... | @@ -15,6 +15,7 @@ |
| 15 | 15 | obj-$(CONFIG_DTT_DS1621) += ds1621.o |
| 16 | 16 | obj-$(CONFIG_DTT_DS1722) += ds1722.o |
| 17 | 17 | obj-$(CONFIG_DTT_DS1775) += ds1775.o |
| 18 | +obj-$(CONFIG_DTT_DS620) += ds620.o | |
| 18 | 19 | obj-$(CONFIG_DTT_LM63) += lm63.o |
| 19 | 20 | obj-$(CONFIG_DTT_LM73) += lm73.o |
| 20 | 21 | obj-$(CONFIG_DTT_LM75) += lm75.o |
drivers/hwmon/ds620.c
| 1 | +/* | |
| 2 | + * DS620 DTT support | |
| 3 | + * | |
| 4 | + * (C) Copyright 2014 3ADEV <http://www.3adev.com> | |
| 5 | + * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr> | |
| 6 | + * | |
| 7 | + * SPDX-License-Identifier: GPL-2.0+ | |
| 8 | + */ | |
| 9 | + | |
| 10 | +/* | |
| 11 | + * Dallas Semiconductor's DS1621/1631 Digital Thermometer and Thermostat. | |
| 12 | + */ | |
| 13 | + | |
| 14 | +#include <common.h> | |
| 15 | +#include <i2c.h> | |
| 16 | +#include <dtt.h> | |
| 17 | + | |
| 18 | +/* | |
| 19 | + * Device code | |
| 20 | + */ | |
| 21 | +#define DTT_I2C_DEV_CODE 0x48 | |
| 22 | +#define DTT_START_CONVERT 0x51 | |
| 23 | +#define DTT_TEMP 0xAA | |
| 24 | +#define DTT_CONFIG 0xAC | |
| 25 | + | |
| 26 | +/* | |
| 27 | + * Config register MSB bits | |
| 28 | + */ | |
| 29 | +#define DTT_CONFIG_1SHOT 0x01 | |
| 30 | +#define DTT_CONFIG_AUTOC 0x02 | |
| 31 | +#define DTT_CONFIG_R0 0x04 /* always 1 */ | |
| 32 | +#define DTT_CONFIG_R1 0x08 /* always 1 */ | |
| 33 | +#define DTT_CONFIG_TLF 0x10 | |
| 34 | +#define DTT_CONFIG_THF 0x20 | |
| 35 | +#define DTT_CONFIG_NVB 0x40 | |
| 36 | +#define DTT_CONFIG_DONE 0x80 | |
| 37 | + | |
| 38 | +#define CHIP(sensor) (DTT_I2C_DEV_CODE + (sensor & 0x07)) | |
| 39 | + | |
| 40 | +int dtt_init_one(int sensor) | |
| 41 | +{ | |
| 42 | + uint8_t config = DTT_CONFIG_1SHOT | |
| 43 | + | DTT_CONFIG_R0 | |
| 44 | + | DTT_CONFIG_R1; | |
| 45 | + return i2c_write(CHIP(sensor), DTT_CONFIG, 1, &config, 1); | |
| 46 | +} | |
| 47 | + | |
| 48 | +int dtt_get_temp(int sensor) | |
| 49 | +{ | |
| 50 | + uint8_t status; | |
| 51 | + uint8_t temp[2]; | |
| 52 | + | |
| 53 | + /* Start a conversion, may take up to 1 second. */ | |
| 54 | + i2c_write(CHIP(sensor), DTT_START_CONVERT, 1, NULL, 0); | |
| 55 | + do { | |
| 56 | + if (i2c_read(CHIP(sensor), DTT_CONFIG, 1, &status, 1)) | |
| 57 | + /* bail out if I2C error */ | |
| 58 | + status |= DTT_CONFIG_DONE; | |
| 59 | + } while (!(status & DTT_CONFIG_DONE)); | |
| 60 | + if (i2c_read(CHIP(sensor), DTT_TEMP, 1, temp, 2)) | |
| 61 | + /* bail out if I2C error */ | |
| 62 | + return -274; /* below absolute zero == error */ | |
| 63 | + | |
| 64 | + return ((int16_t)(temp[1] | (temp[0] << 8))) >> 7; | |
| 65 | +} |
include/dtt.h
| ... | ... | @@ -12,13 +12,14 @@ |
| 12 | 12 | #define _DTT_H_ |
| 13 | 13 | |
| 14 | 14 | #if defined(CONFIG_DTT_ADM1021) || \ |
| 15 | - defined(CONFIG_DTT_ADT7460) || \ | |
| 16 | - defined(CONFIG_DTT_DS1621) || \ | |
| 17 | - defined(CONFIG_DTT_DS1775) || \ | |
| 18 | - defined(CONFIG_DTT_LM63) || \ | |
| 19 | - defined(CONFIG_DTT_LM73) || \ | |
| 20 | - defined(CONFIG_DTT_LM75) || \ | |
| 21 | - defined(CONFIG_DTT_LM81) | |
| 15 | + defined(CONFIG_DTT_ADT7460) || \ | |
| 16 | + defined(CONFIG_DTT_DS1621) || \ | |
| 17 | + defined(CONFIG_DTT_DS1775) || \ | |
| 18 | + defined(CONFIG_DTT_DS620) || \ | |
| 19 | + defined(CONFIG_DTT_LM63) || \ | |
| 20 | + defined(CONFIG_DTT_LM73) || \ | |
| 21 | + defined(CONFIG_DTT_LM75) || \ | |
| 22 | + defined(CONFIG_DTT_LM81) | |
| 22 | 23 | |
| 23 | 24 | #define CONFIG_DTT /* We have a DTT */ |
| 24 | 25 |