mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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Basic driver for tmp432 temperature sensor
This allows local and remote temp values to be added to a board's list of temp sensors. It also adds a 'tmp432' EC console command to query temps and set alert thresholds. Fractional degrees are not supported. DPTF support is not addressed. BUG=chrome-os-partner:23985 BRANCH=none TEST=Add tmp432 support to a board with the sensor then run the 'tmp432' and 'temps' EC console commands. Signed-off-by: Dave Parker <dparker@chromium.org> Change-Id: Ifee47cf4d4cf5eedef9ef2bfa2149f183f1d7a7b Reviewed-on: https://chromium-review.googlesource.com/178688 Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Dave Parker <dparker@chromium.org> Tested-by: Dave Parker <dparker@chromium.org>
This commit is contained in:
ChromeOS Developer
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chrome-internal-fetch
chrome-internal-fetch
parent
f9e00364ef
commit
d53fe7b79b
@@ -32,6 +32,7 @@ driver-$(CONFIG_REGULATOR_IR357X)+=regulator_ir357x.o
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# Temperature sensors
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driver-$(CONFIG_TEMP_SENSOR_G781)+=temp_sensor/g781.o
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driver-$(CONFIG_TEMP_SENSOR_TMP006)+=temp_sensor/tmp006.o
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driver-$(CONFIG_TEMP_SENSOR_TMP432)+=temp_sensor/tmp432.o
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# USB switches
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driver-$(CONFIG_USB_SWITCH_TSU6721)+=usb_switch_tsu6721.o
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217
driver/temp_sensor/tmp432.c
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217
driver/temp_sensor/tmp432.c
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@@ -0,0 +1,217 @@
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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* TMP432 temperature sensor module for Chrome EC */
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#include "common.h"
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#include "console.h"
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#include "tmp432.h"
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#include "gpio.h"
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#include "i2c.h"
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#include "hooks.h"
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#include "util.h"
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static int temp_val_local;
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static int temp_val_remote1;
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static int temp_val_remote2;
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/**
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* Determine whether the sensor is powered.
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*
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* @return non-zero the tmp432 sensor is powered.
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*/
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static int has_power(void)
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{
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#ifdef CONFIG_TEMP_SENSOR_POWER_GPIO
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return gpio_get_level(CONFIG_TEMP_SENSOR_POWER_GPIO);
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#else
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return 1;
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#endif
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}
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static int raw_read8(const int offset, int *data_ptr)
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{
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return i2c_read8(I2C_PORT_THERMAL, TMP432_I2C_ADDR, offset, data_ptr);
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}
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static int raw_write8(const int offset, int data)
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{
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return i2c_write8(I2C_PORT_THERMAL, TMP432_I2C_ADDR, offset, data);
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}
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static int get_temp(const int offset, int *temp_ptr)
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{
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int rv;
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int temp_raw = 0;
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rv = raw_read8(offset, &temp_raw);
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if (rv < 0)
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return rv;
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*temp_ptr = (int)(int8_t)temp_raw;
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return EC_SUCCESS;
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}
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static int tmp432_set_temp(const int offset, int temp)
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{
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if (temp < -127 || temp > 127)
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return EC_ERROR_INVAL;
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return raw_write8(offset, (uint8_t)temp);
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}
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int tmp432_get_val(int idx, int *temp_ptr)
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{
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if (!has_power())
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return EC_ERROR_NOT_POWERED;
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switch (idx) {
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case TMP432_IDX_LOCAL:
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*temp_ptr = temp_val_local;
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break;
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case TMP432_IDX_REMOTE1:
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*temp_ptr = temp_val_remote1;
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break;
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case TMP432_IDX_REMOTE2:
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*temp_ptr = temp_val_remote2;
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break;
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default:
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return EC_ERROR_UNKNOWN;
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}
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return EC_SUCCESS;
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}
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static void temp_sensor_poll(void)
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{
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int temp_c;
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if (!has_power())
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return;
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if (get_temp(TMP432_LOCAL, &temp_c) == EC_SUCCESS)
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temp_val_local = C_TO_K(temp_c);
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if (get_temp(TMP432_REMOTE1, &temp_c) == EC_SUCCESS)
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temp_val_remote1 = C_TO_K(temp_c);
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if (get_temp(TMP432_REMOTE2, &temp_c) == EC_SUCCESS)
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temp_val_remote2 = C_TO_K(temp_c);
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}
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DECLARE_HOOK(HOOK_SECOND, temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
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static void print_temps(
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const char *name,
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const int tmp432_temp_reg,
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const int tmp432_therm_limit_reg,
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const int tmp432_high_limit_reg,
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const int tmp432_low_limit_reg)
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{
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int value;
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ccprintf("%s:\n", name);
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if (get_temp(tmp432_temp_reg, &value) == EC_SUCCESS)
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ccprintf(" Temp %3dC\n", value);
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if (get_temp(tmp432_therm_limit_reg, &value) == EC_SUCCESS)
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ccprintf(" Therm Trip %3dC\n", value);
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if (get_temp(tmp432_high_limit_reg, &value) == EC_SUCCESS)
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ccprintf(" High Alarm %3dC\n", value);
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if (get_temp(tmp432_low_limit_reg, &value) == EC_SUCCESS)
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ccprintf(" Low Alarm %3dC\n", value);
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}
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static int print_status(void)
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{
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int value;
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print_temps("Local", TMP432_LOCAL,
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TMP432_LOCAL_THERM_LIMIT,
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TMP432_LOCAL_HIGH_LIMIT_R,
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TMP432_LOCAL_LOW_LIMIT_R);
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print_temps("Remote1", TMP432_REMOTE1,
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TMP432_REMOTE1_THERM_LIMIT,
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TMP432_REMOTE1_HIGH_LIMIT_R,
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TMP432_REMOTE1_LOW_LIMIT_R);
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print_temps("Remote2", TMP432_REMOTE2,
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TMP432_REMOTE2_THERM_LIMIT,
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TMP432_REMOTE2_HIGH_LIMIT_R,
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TMP432_REMOTE2_LOW_LIMIT_R);
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ccprintf("\n");
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if (raw_read8(TMP432_STATUS, &value) == EC_SUCCESS)
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ccprintf("STATUS: %08b\n", value);
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if (raw_read8(TMP432_CONFIGURATION1_R, &value) == EC_SUCCESS)
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ccprintf("CONFIG1: %08b\n", value);
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if (raw_read8(TMP432_CONFIGURATION2_R, &value) == EC_SUCCESS)
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ccprintf("CONFIG2: %08b\n", value);
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return EC_SUCCESS;
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}
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static int command_tmp432(int argc, char **argv)
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{
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char *command;
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char *e;
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int data;
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int offset;
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int rv;
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if (!has_power()) {
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ccprintf("ERROR: Temp sensor not powered.\n");
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return EC_ERROR_NOT_POWERED;
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}
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/* If no args just print status */
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if (argc == 1)
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return print_status();
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if (argc < 3)
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return EC_ERROR_PARAM_COUNT;
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command = argv[1];
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offset = strtoi(argv[2], &e, 0);
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if (*e || offset < 0 || offset > 255)
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return EC_ERROR_PARAM2;
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if (!strcasecmp(command, "getbyte")) {
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rv = raw_read8(offset, &data);
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if (rv < 0)
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return rv;
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ccprintf("Byte at offset 0x%02x is %08b\n", offset, data);
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return rv;
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}
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/* Remaining commands are "tmp432 set-command offset data" */
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if (argc != 4)
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return EC_ERROR_PARAM_COUNT;
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data = strtoi(argv[3], &e, 0);
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if (*e)
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return EC_ERROR_PARAM3;
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if (!strcasecmp(command, "settemp")) {
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ccprintf("Setting 0x%02x to %dC\n", offset, data);
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rv = tmp432_set_temp(offset, data);
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} else if (!strcasecmp(command, "setbyte")) {
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ccprintf("Setting 0x%02x to 0x%02x\n", offset, data);
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rv = raw_write8(offset, data);
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} else
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return EC_ERROR_PARAM1;
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return rv;
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}
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DECLARE_CONSOLE_COMMAND(tmp432, command_tmp432,
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"[settemp|setbyte <offset> <value>] or [getbyte <offset>]. "
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"Temps in Celsius.",
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"Print tmp432 temp sensor status or set parameters.", NULL);
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96
driver/temp_sensor/tmp432.h
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96
driver/temp_sensor/tmp432.h
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@@ -0,0 +1,96 @@
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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* TMP432 temperature sensor module for Chrome EC */
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#ifndef __CROS_EC_TEMP_SENSOR_TMP432_H
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#define __CROS_EC_TEMP_SENSOR_TMP432_H
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#define TMP432_I2C_ADDR 0x98 /* 7-bit address is 0x4C */
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#define TMP432_IDX_LOCAL 0
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#define TMP432_IDX_REMOTE1 1
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#define TMP432_IDX_REMOTE2 2
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/* Chip-specific registers */
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#define TMP432_LOCAL 0x00
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#define TMP432_REMOTE1 0x01
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#define TMP432_STATUS 0x02
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#define TMP432_CONFIGURATION1_R 0x03
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#define TMP432_CONVERSION_RATE_R 0x04
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#define TMP432_LOCAL_HIGH_LIMIT_R 0x05
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#define TMP432_LOCAL_LOW_LIMIT_R 0x06
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#define TMP432_REMOTE1_HIGH_LIMIT_R 0x07
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#define TMP432_REMOTE1_LOW_LIMIT_R 0x08
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#define TMP432_CONFIGURATION1_W 0x09
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#define TMP432_CONVERSION_RATE_W 0x0a
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#define TMP432_LOCAL_HIGH_LIMIT_W 0x0b
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#define TMP432_LOCAL_LOW_LIMIT_W 0x0c
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#define TMP432_REMOTE1_HIGH_LIMIT_W 0x0d
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#define TMP432_REMOTE1_LOW_LIMIT_W 0x0e
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#define TMP432_ONESHOT 0x0f
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#define TMP432_REMOTE1_EXTD 0x10
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#define TMP432_REMOTE1_HIGH_LIMIT_EXTD 0x13
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#define TMP432_REMOTE1_LOW_LIMIT_EXTD 0x14
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#define TMP432_REMOTE2_HIGH_LIMIT_R 0x15
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#define TMP432_REMOTE2_HIGH_LIMIT_W 0x15
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#define TMP432_REMOTE2_LOW_LIMIT_R 0x16
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#define TMP432_REMOTE2_LOW_LIMIT_W 0x16
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#define TMP432_REMOTE2_HIGH_LIMIT_EXTD 0x17
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#define TMP432_REMOTE2_LOW_LIMIT_EXTD 0x18
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#define TMP432_REMOTE1_THERM_LIMIT 0x19
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#define TMP432_REMOTE2_THERM_LIMIT 0x1a
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#define TMP432_STATUS_FAULT 0x1b
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#define TMP432_CHANNEL_MASK 0x1f
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#define TMP432_LOCAL_THERM_LIMIT 0x20
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#define TMP432_THERM_HYSTERESIS 0x21
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#define TMP432_CONSECUTIVE_ALERT 0x22
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#define TMP432_REMOTE2 0x23
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#define TMP432_REMOTE2_EXTD 0x24
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#define TMP432_BETA_RANGE_CH1 0x25
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#define TMP432_BETA_RANGE_CH2 0x26
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#define TMP432_NFACTOR_REMOTE1 0x27
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#define TMP432_NFACTOR_REMOTE2 0x28
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#define TMP432_LOCAL_EXTD 0x29
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#define TMP432_STATUS_LIMIT_HIGH 0x35
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#define TMP432_STATUS_LIMIT_LOW 0x36
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#define TMP432_STATUS_THERM 0x37
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#define TMP432_LOCAL_HIGH_LIMIT_EXTD 0x3d
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#define TMP432_LOCAL_LOW_LIMIT_EXTD 0x3e
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#define TMP432_CONFIGURATION2_R 0x3f
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#define TMP432_CONFIGURATION2_W 0x3f
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#define TMP432_RESET_W 0xfc
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#define TMP432_DEVICE_ID 0xfd
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#define TMP432_MANUFACTURER_ID 0xfe
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/* Config register bits */
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#define TMP432_CONFIG1_TEMP_RANGE (1 << 2)
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#define TMP432_CONFIG1_MODE (1 << 5)
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#define TMP432_CONFIG1_RUN_L (1 << 6)
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#define TMP432_CONFIG1_ALERT_MASK_L (1 << 7)
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#define TMP432_CONFIG2_RESISTANCE_CORRECTION (1 << 2)
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#define TMP432_CONFIG2_LOCAL_ENABLE (1 << 3)
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#define TMP432_CONFIG2_REMOTE1_ENABLE (1 << 4)
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#define TMP432_CONFIG2_REMOTE2_ENABLE (1 << 5)
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/* Status register bits */
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#define TMP432_STATUS_TEMP_THERM_ALARM (1 << 1)
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#define TMP432_STATUS_OPEN (1 << 2)
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#define TMP432_STATUS_TEMP_LOW_ALARM (1 << 3)
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#define TMP432_STATUS_TEMP_HIGH_ALARM (1 << 4)
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#define TMP432_STATUS_BUSY (1 << 7)
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/**
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* Get the last polled value of a sensor.
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*
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* @param idx Index to read. Idx indicates whether to read die
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* temperature or external temperature.
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* @param temp_ptr Destination for temperature in K.
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*
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int tmp432_get_val(int idx, int *temp_ptr);
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#endif /* __CROS_EC_TEMP_SENSOR_TMP432_H */
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@@ -662,6 +662,7 @@
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/* Support particular temperature sensor chips */
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#undef CONFIG_TEMP_SENSOR_G781 /* G781 sensor, on I2C bus */
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#undef CONFIG_TEMP_SENSOR_TMP006 /* TI TMP006 sensor, on I2C bus */
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#undef CONFIG_TEMP_SENSOR_TMP432 /* TI TMP432 sensor, on I2C bus */
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/*
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* If defined, active-high GPIO which indicates temperature sensor chips are
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