hwmon: (pmbus/acbel-fsg032) Add Acbel power supply

Add the driver to support ACBEL FSG032 power supply.

Signed-off-by: Lakshmi Yadlapati <lakshmiy@us.ibm.com>
Link: https://lore.kernel.org/r/20230413132627.3444119-4-lakshmiy@us.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 59d9a74..270b633 100644 (file)
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -27,6 +27,15 @@ config SENSORS_PMBUS
          This driver can also be built as a module. If so, the module will
          be called pmbus.
 
+config SENSORS_ACBEL_FSG032
+       tristate "ACBEL FSG032 Power Supply"
+       help
+         If you say yes here you get hardware monitoring support for the ACBEL
+         FSG032 Power Supply.
+
+         This driver can also be built as a module. If so, the module will
+         be called acbel-fsg032.
+
 config SENSORS_ADM1266
        tristate "Analog Devices ADM1266 Sequencer"
        select CRC8

diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 3ae0199..84ee960 100644 (file)
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -5,6 +5,7 @@
 
 obj-$(CONFIG_PMBUS)            += pmbus_core.o
 obj-$(CONFIG_SENSORS_PMBUS)    += pmbus.o
+obj-$(CONFIG_SENSORS_ACBEL_FSG032) += acbel-fsg032.o
 obj-$(CONFIG_SENSORS_ADM1266)  += adm1266.o
 obj-$(CONFIG_SENSORS_ADM1275)  += adm1275.o
 obj-$(CONFIG_SENSORS_BEL_PFE)  += bel-pfe.o

diff --git a/drivers/hwmon/pmbus/acbel-fsg032.c b/drivers/hwmon/pmbus/acbel-fsg032.c
new file mode 100644 (file)
index 0000000..28a25f3
--- /dev/null
+++ b/drivers/hwmon/pmbus/acbel-fsg032.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2023 IBM Corp.
+ */
+
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include <linux/hwmon-sysfs.h>
+#include "pmbus.h"
+
+static const struct i2c_device_id acbel_fsg032_id[] = {
+       { "acbel_fsg032" },
+       {}
+};
+
+static struct pmbus_driver_info acbel_fsg032_info = {
+       .pages = 1,
+       .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN |
+                  PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT |
+                  PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
+                  PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_VOUT |
+                  PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_TEMP |
+                  PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_FAN12,
+};
+
+static int acbel_fsg032_probe(struct i2c_client *client)
+{
+       u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
+       struct device *dev = &client->dev;
+       int rc;
+
+       rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
+       if (rc < 0) {
+               dev_err(dev, "Failed to read PMBUS_MFR_ID\n");
+               return rc;
+       }
+       if (strncmp(buf, "ACBEL", 5)) {
+               buf[rc] = '\0';
+               dev_err(dev, "Manufacturer '%s' not supported\n", buf);
+               return -ENODEV;
+       }
+
+       rc = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
+       if (rc < 0) {
+               dev_err(dev, "Failed to read PMBUS_MFR_MODEL\n");
+               return rc;
+       }
+
+       if (strncmp(buf, "FSG032", 6)) {
+               buf[rc] = '\0';
+               dev_err(dev, "Model '%s' not supported\n", buf);
+               return -ENODEV;
+       }
+
+       rc = pmbus_do_probe(client, &acbel_fsg032_info);
+       if (rc)
+               return rc;
+
+       return 0;
+}
+
+static const struct of_device_id acbel_fsg032_of_match[] = {
+       { .compatible = "acbel,fsg032" },
+       {}
+};
+MODULE_DEVICE_TABLE(of, acbel_fsg032_of_match);
+
+static struct i2c_driver acbel_fsg032_driver = {
+       .driver = {
+               .name = "acbel-fsg032",
+               .of_match_table = acbel_fsg032_of_match,
+       },
+       .probe_new = acbel_fsg032_probe,
+       .id_table = acbel_fsg032_id,
+};
+
+module_i2c_driver(acbel_fsg032_driver);
+
+MODULE_AUTHOR("Lakshmi Yadlapati");
+MODULE_DESCRIPTION("PMBus driver for AcBel Power System power supplies");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);