Add the driver to support ACBEL FSG032 power supply.
Change-Id: Ief984325fe3fa0ed042e1d00e34ff579b45e1c81
Signed-off-by: Lakshmi Yadlapati <lakshmiy@xxxxxxxxxx>
---
drivers/hwmon/pmbus/Kconfig | 9 +++
drivers/hwmon/pmbus/Makefile | 1 +
drivers/hwmon/pmbus/acbel-fsg032.c | 95 ++++++++++++++++++++++++++++++
3 files changed, 105 insertions(+)
create mode 100644 drivers/hwmon/pmbus/acbel-fsg032.c
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 59d9a7430499..270b6336b76d 100644
--- 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 3ae019916267..84ee960a6c2d 100644
--- 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
index 000000000000..f160f45c7ac5
--- /dev/null
+++ b/drivers/hwmon/pmbus/acbel-fsg032.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2023 IBM Corp.
+ */
+
+#include <linux/debugfs.h>
+#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;
+ struct dentry *debugfs;
+ 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;
+
+ debugfs = pmbus_get_debugfs_dir(client);
+ if (!debugfs)
+ return rc;
+
+ /* ccin is not available, create a symlink from the
+ * mfr_serial to ccin as required by hwmon */
+ debugfs_create_symlink("ccin", debugfs, "mfr_serial");
+
+ 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);
--
2.37.2
