hwmon: (ina238) Add support for INA700

INA700 is register compatible to INA780 but has different current, power,
and energy LSB values.

While the chip does not directly report the shunt voltage, report
it anyway by calculating its value from the current register.

Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz> # INA780
Cc: Christian Kahr <christian.kahr@sie.at>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/hwmon/ina238.rst b/Documentation/hwmon/ina238.rst
index 7227609618215081336fac2e9af67b20d9f452de..43950d1ec551f7f93a5110a40a4e007b49894cba 100644 (file)
--- a/Documentation/hwmon/ina238.rst
+++ b/Documentation/hwmon/ina238.rst
@@ -32,6 +32,11 @@ Supported chips:
     Datasheet:
        https://www.ti.com/lit/gpn/ina238
 
+  * Texas Instruments INA700
+
+    Datasheet:
+       https://www.ti.com/product/ina700
+
   * Texas Instruments INA780
 
     Datasheet:
@@ -61,8 +66,8 @@ INA237 is a functionally equivalent variant of INA238 with slightly
 different accuracy. INA228 is another variant of INA238 with higher ADC
 resolution. This chip also reports the energy.
 
-INA780 is a variant of the chip series with built-in shunt resistor.
-It also reports the energy.
+INA700 and INA780 are variants of the chip series with built-in shunt resistor.
+They also report the energy.
 
 SQ52206 is a mostly compatible chip from Sylergy. It reports the energy
 as well as the peak power consumption.

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index c044c26fbd114d73109daec7bba1611c31edea58..8a41275ca518b1baa32e6352be7300983734598b 100644 (file)
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2257,9 +2257,9 @@ config SENSORS_INA238
        select REGMAP_I2C
        help
          If you say yes here you get support for INA228, INA237, INA238,
-         INA780, and SQ52206 power monitor chips. This driver supports voltage,
-         current, power, energy, and temperature measurements as well as alarm
-         configuration.
+         INA700, INA780, and SQ52206 power monitor chips. This driver supports
+         voltage, current, power, energy, and temperature measurements as well
+         as alarm configuration.
 
          This driver can also be built as a module. If so, the module
          will be called ina238.

diff --git a/drivers/hwmon/ina238.c b/drivers/hwmon/ina238.c
index 98255619adeb72afa99317cab3c7bcf0693a3795..356d19b7675cacf9ae9b1013b160248f1219c4d0 100644 (file)
--- a/drivers/hwmon/ina238.c
+++ b/drivers/hwmon/ina238.c
@@ -101,7 +101,7 @@ static const struct regmap_config ina238_regmap_config = {
        .val_bits = 16,
 };
 
-enum ina238_ids { ina228, ina237, ina238, ina780, sq52206 };
+enum ina238_ids { ina228, ina237, ina238, ina700, ina780, sq52206 };
 
 struct ina238_config {
        bool has_20bit_voltage_current; /* vshunt, vbus and current are 20-bit fields */
@@ -155,6 +155,16 @@ static const struct ina238_config ina238_config[] = {
                .bus_voltage_lsb = INA238_BUS_VOLTAGE_LSB,
                .temp_resolution = 12,
        },
+       [ina700] = {
+               .has_20bit_voltage_current = false,
+               .has_energy = true,
+               .has_power_highest = false,
+               .power_calculate_factor = 20,
+               .config_default = INA238_CONFIG_DEFAULT,
+               .bus_voltage_lsb = INA238_BUS_VOLTAGE_LSB,
+               .temp_resolution = 12,
+               .current_lsb = 480,
+       },
        [ina780] = {
                .has_20bit_voltage_current = false,
                .has_energy = true,
@@ -846,6 +856,7 @@ static const struct i2c_device_id ina238_id[] = {
        { "ina228", ina228 },
        { "ina237", ina237 },
        { "ina238", ina238 },
+       { "ina700", ina700 },
        { "ina780", ina780 },
        { "sq52206", sq52206 },
        { }
@@ -865,6 +876,10 @@ static const struct of_device_id __maybe_unused ina238_of_match[] = {
                .compatible = "ti,ina238",
                .data = (void *)ina238
        },
+       {
+               .compatible = "ti,ina700",
+               .data = (void *)ina700
+       },
        {
                .compatible = "ti,ina780",
                .data = (void *)ina780