hwmon: (pmbus) Add support for MPS Multi-phase mp5023

Add support for mp5023 device from Monolithic Power Systems, Inc. (MPS)
vendor. This is a Hot-Swap Controller.

Signed-off-by: Howard Chiu <howard.chiu@quantatw.com>
Link: https://lore.kernel.org/r/HKAPR04MB400349AA406694FB976D78D096709@HKAPR04MB4003.apcprd04.prod.outlook.com
[groeck: Added MODULE_IMPORT_NS, entry in index.rst]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index 9c9361d..284dfe2 100644 (file)
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -145,6 +145,7 @@ Hardware Monitoring Kernel Drivers
    mlxreg-fan
    mp2888
    mp2975
+   mp5023
    nct6683
    nct6775
    nct7802

diff --git a/Documentation/hwmon/mp5023.rst b/Documentation/hwmon/mp5023.rst
new file mode 100644 (file)
index 0000000..af5ab13
--- /dev/null
+++ b/Documentation/hwmon/mp5023.rst
@@ -0,0 +1,84 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Kernel driver mp5023
+====================
+
+Supported chips:
+
+  * MPS MP5023
+
+    Prefix: 'mp5023'
+
+  * Datasheet
+
+    Publicly available at the MPS website : https://www.monolithicpower.com/en/mp5023.html
+
+Author:
+
+       Howard Chiu <howard.chiu@quantatw.com>
+
+Description
+-----------
+
+This driver implements support for Monolithic Power Systems, Inc. (MPS)
+MP5023 Hot-Swap Controller.
+
+Device complaint with:
+
+- PMBus rev 1.3 interface.
+
+Device supports direct format for reading input voltage, output voltage,
+output current, input power and temperature.
+
+The driver exports the following attributes via the 'sysfs' files
+for input voltage:
+
+**in1_input**
+
+**in1_label**
+
+**in1_max**
+
+**in1_max_alarm**
+
+**in1_min**
+
+**in1_min_alarm**
+
+The driver provides the following attributes for output voltage:
+
+**in2_input**
+
+**in2_label**
+
+**in2_alarm**
+
+The driver provides the following attributes for output current:
+
+**curr1_input**
+
+**curr1_label**
+
+**curr1_alarm**
+
+**curr1_max**
+
+The driver provides the following attributes for input power:
+
+**power1_input**
+
+**power1_label**
+
+**power1_alarm**
+
+The driver provides the following attributes for temperature:
+
+**temp1_input**
+
+**temp1_max**
+
+**temp1_max_alarm**
+
+**temp1_crit**
+
+**temp1_crit_alarm**

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 0b1157b..4458757 100644 (file)
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -286,6 +286,15 @@ config SENSORS_MP2975
          This driver can also be built as a module. If so, the module will
          be called mp2975.
 
+config SENSORS_MP5023
+       tristate "MPS MP5023"
+       help
+         If you say yes here you get hardware monitoring support for MPS
+         MP5023.
+
+         This driver can also be built as a module. If so, the module will
+         be called mp5023.
+
 config SENSORS_PIM4328
        tristate "Flex PIM4328 and compatibles"
        help

diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index a56b289..e5935f7 100644 (file)
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_SENSORS_MAX34440)        += max34440.o
 obj-$(CONFIG_SENSORS_MAX8688)  += max8688.o
 obj-$(CONFIG_SENSORS_MP2888)   += mp2888.o
 obj-$(CONFIG_SENSORS_MP2975)   += mp2975.o
+obj-$(CONFIG_SENSORS_MP5023)   += mp5023.o
 obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o
 obj-$(CONFIG_SENSORS_PXE1610)  += pxe1610.o
 obj-$(CONFIG_SENSORS_Q54SJ108A2)       += q54sj108a2.o

diff --git a/drivers/hwmon/pmbus/mp5023.c b/drivers/hwmon/pmbus/mp5023.c
new file mode 100644 (file)
index 0000000..791a06c
--- /dev/null
+++ b/drivers/hwmon/pmbus/mp5023.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for MPS MP5023 Hot-Swap Controller
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include "pmbus.h"
+
+static struct pmbus_driver_info mp5023_info = {
+       .pages = 1,
+
+       .format[PSC_VOLTAGE_IN] = direct,
+       .format[PSC_VOLTAGE_OUT] = direct,
+       .format[PSC_CURRENT_OUT] = direct,
+       .format[PSC_POWER] = direct,
+       .format[PSC_TEMPERATURE] = direct,
+
+       .m[PSC_VOLTAGE_IN] = 32,
+       .b[PSC_VOLTAGE_IN] = 0,
+       .R[PSC_VOLTAGE_IN] = 0,
+       .m[PSC_VOLTAGE_OUT] = 32,
+       .b[PSC_VOLTAGE_OUT] = 0,
+       .R[PSC_VOLTAGE_OUT] = 0,
+       .m[PSC_CURRENT_OUT] = 16,
+       .b[PSC_CURRENT_OUT] = 0,
+       .R[PSC_CURRENT_OUT] = 0,
+       .m[PSC_POWER] = 1,
+       .b[PSC_POWER] = 0,
+       .R[PSC_POWER] = 0,
+       .m[PSC_TEMPERATURE] = 2,
+       .b[PSC_TEMPERATURE] = 0,
+       .R[PSC_TEMPERATURE] = 0,
+
+       .func[0] =
+               PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_PIN |
+               PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT |
+               PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
+};
+
+static int mp5023_probe(struct i2c_client *client)
+{
+       return pmbus_do_probe(client, &mp5023_info);
+}
+
+static const struct of_device_id __maybe_unused mp5023_of_match[] = {
+       { .compatible = "mps,mp5023", },
+       {}
+};
+
+MODULE_DEVICE_TABLE(of, mp5023_of_match);
+
+static struct i2c_driver mp5023_driver = {
+       .driver = {
+                  .name = "mp5023",
+                  .of_match_table = of_match_ptr(mp5023_of_match),
+       },
+       .probe_new = mp5023_probe,
+};
+
+module_i2c_driver(mp5023_driver);
+
+MODULE_AUTHOR("Howard Chiu <howard.chiu@quantatw.com>");
+MODULE_DESCRIPTION("PMBus driver for MPS MP5023 HSC");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);