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-rw-r--r--Documentation/hwmon/ina2xx.rst23
-rw-r--r--drivers/hwmon/Kconfig5
-rw-r--r--drivers/hwmon/ina2xx.c42
3 files changed, 59 insertions, 11 deletions
diff --git a/Documentation/hwmon/ina2xx.rst b/Documentation/hwmon/ina2xx.rst
index 7f1939b40f74..1ce161e6c0bf 100644
--- a/Documentation/hwmon/ina2xx.rst
+++ b/Documentation/hwmon/ina2xx.rst
@@ -53,6 +53,16 @@ Supported chips:
https://www.ti.com/
+ * Texas Instruments INA260
+
+ Prefix: 'ina260'
+
+ Addresses: I2C 0x40 - 0x4f
+
+ Datasheet: Publicly available at the Texas Instruments website
+
+ https://www.ti.com/
+
Author: Lothar Felten <lothar.felten@gmail.com>
Description
@@ -72,6 +82,9 @@ INA230 and INA231 are high or low side current shunt and power monitors
with an I2C interface. The chips monitor both a shunt voltage drop and
bus supply voltage.
+INA260 is a high or low side current and power monitor with integrated shunt
+resistor.
+
The shunt value in micro-ohms can be set via platform data or device tree at
compile-time or via the shunt_resistor attribute in sysfs at run-time. Please
refer to the Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml for bindings
@@ -87,16 +100,16 @@ The actual programmed interval may vary from the desired value.
General sysfs entries
---------------------
-======================= ===============================
+======================= ===============================================
in0_input Shunt voltage(mV) channel
in1_input Bus voltage(mV) channel
curr1_input Current(mA) measurement channel
power1_input Power(uW) measurement channel
-shunt_resistor Shunt resistance(uOhm) channel
-======================= ===============================
+shunt_resistor Shunt resistance(uOhm) channel (not for ina260)
+======================= ===============================================
-Sysfs entries for ina226, ina230 and ina231 only
-------------------------------------------------
+Additional sysfs entries for ina226, ina230, ina231, and ina260
+---------------------------------------------------------------
======================= ====================================================
curr1_lcrit Critical low current
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 08a3c863f80a..6a3385598cc6 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2167,11 +2167,12 @@ config SENSORS_INA2XX
select REGMAP_I2C
help
If you say yes here you get support for INA219, INA220, INA226,
- INA230, and INA231 power monitor chips.
+ INA230, INA231, and INA260 power monitor chips.
The INA2xx driver is configured for the default configuration of
the part as described in the datasheet.
- Default value for Rshunt is 10 mOhms.
+ Default value for Rshunt is 10 mOhms except for INA260 which has an
+ internal 2 mOhm shunt resistor.
This driver can also be built as a module. If so, the module
will be called ina2xx.
diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
index 03a011c9b73d..cecc80a41a97 100644
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -56,12 +56,14 @@
/* settings - depend on use case */
#define INA219_CONFIG_DEFAULT 0x399F /* PGA=8 */
#define INA226_CONFIG_DEFAULT 0x4527 /* averages=16 */
+#define INA260_CONFIG_DEFAULT 0x6527 /* averages=16 */
/* worst case is 68.10 ms (~14.6Hz, ina219) */
#define INA2XX_CONVERSION_RATE 15
#define INA2XX_MAX_DELAY 69 /* worst case delay in ms */
#define INA2XX_RSHUNT_DEFAULT 10000
+#define INA260_RSHUNT 2000
/* bit mask for reading the averaging setting in the configuration register */
#define INA226_AVG_RD_MASK GENMASK(11, 9)
@@ -125,11 +127,12 @@ static const struct regmap_config ina2xx_regmap_config = {
.writeable_reg = ina2xx_writeable_reg,
};
-enum ina2xx_ids { ina219, ina226 };
+enum ina2xx_ids { ina219, ina226, ina260 };
struct ina2xx_config {
u16 config_default;
bool has_alerts; /* chip supports alerts and limits */
+ bool has_ishunt; /* chip has internal shunt resistor */
int calibration_value;
int shunt_div;
int bus_voltage_shift;
@@ -157,6 +160,7 @@ static const struct ina2xx_config ina2xx_config[] = {
.bus_voltage_lsb = 4000,
.power_lsb_factor = 20,
.has_alerts = false,
+ .has_ishunt = false,
},
[ina226] = {
.config_default = INA226_CONFIG_DEFAULT,
@@ -166,6 +170,16 @@ static const struct ina2xx_config ina2xx_config[] = {
.bus_voltage_lsb = 1250,
.power_lsb_factor = 25,
.has_alerts = true,
+ .has_ishunt = false,
+ },
+ [ina260] = {
+ .config_default = INA260_CONFIG_DEFAULT,
+ .shunt_div = 400,
+ .bus_voltage_shift = 0,
+ .bus_voltage_lsb = 1250,
+ .power_lsb_factor = 8,
+ .has_alerts = true,
+ .has_ishunt = true,
},
};
@@ -257,6 +271,15 @@ static int ina2xx_read_init(struct device *dev, int reg, long *val)
unsigned int regval;
int ret, retry;
+ if (data->config->has_ishunt) {
+ /* No calibration needed */
+ ret = regmap_read(regmap, reg, &regval);
+ if (ret < 0)
+ return ret;
+ *val = ina2xx_get_value(data, reg, regval);
+ return 0;
+ }
+
for (retry = 5; retry; retry--) {
ret = regmap_read(regmap, reg, &regval);
if (ret < 0)
@@ -686,7 +709,7 @@ static umode_t ina2xx_is_visible(const void *_data, enum hwmon_sensor_types type
case hwmon_chip:
switch (attr) {
case hwmon_chip_update_interval:
- if (chip == ina226)
+ if (chip == ina226 || chip == ina260)
return 0644;
break;
default:
@@ -795,7 +818,9 @@ static int ina2xx_init(struct device *dev, struct ina2xx_data *data)
u32 shunt;
int ret;
- if (device_property_read_u32(dev, "shunt-resistor", &shunt) < 0)
+ if (data->config->has_ishunt)
+ shunt = INA260_RSHUNT;
+ else if (device_property_read_u32(dev, "shunt-resistor", &shunt) < 0)
shunt = INA2XX_RSHUNT_DEFAULT;
ret = ina2xx_set_shunt(data, shunt);
@@ -815,6 +840,9 @@ static int ina2xx_init(struct device *dev, struct ina2xx_data *data)
FIELD_PREP(INA226_ALERT_POLARITY, active_high));
}
+ if (data->config->has_ishunt)
+ return 0;
+
/*
* Calibration register is set to the best value, which eliminates
* truncation errors on calculating current register in hardware.
@@ -860,7 +888,8 @@ static int ina2xx_probe(struct i2c_client *client)
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
data, &ina2xx_chip_info,
- ina2xx_groups);
+ data->config->has_ishunt ?
+ NULL : ina2xx_groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
@@ -876,6 +905,7 @@ static const struct i2c_device_id ina2xx_id[] = {
{ "ina226", ina226 },
{ "ina230", ina226 },
{ "ina231", ina226 },
+ { "ina260", ina260 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ina2xx_id);
@@ -901,6 +931,10 @@ static const struct of_device_id __maybe_unused ina2xx_of_match[] = {
.compatible = "ti,ina231",
.data = (void *)ina226
},
+ {
+ .compatible = "ti,ina260",
+ .data = (void *)ina260
+ },
{ },
};
MODULE_DEVICE_TABLE(of, ina2xx_of_match);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-30 10:08:50 +0100