[PATCH 1/3] hwmon: (pmbus) add BEL PFE1100 power supply driver

[rentao . bupt]

From: Tao Ren <rentao.bupt@xxxxxxxxx>

Add the driver to support BEL PFE1100 which is 1100 Wat AC to DC power
supply. The chip has only 1 page.

Signed-off-by: Tao Ren <rentao.bupt@xxxxxxxxx>
---
 drivers/hwmon/pmbus/Kconfig   |  9 +++++
 drivers/hwmon/pmbus/Makefile  |  1 +
 drivers/hwmon/pmbus/bel-pfe.c | 68 +++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 drivers/hwmon/pmbus/bel-pfe.c

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index d62d69bb7e49..59859979571d 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -36,6 +36,15 @@ config SENSORS_ADM1275
 	  This driver can also be built as a module. If so, the module will
 	  be called adm1275.
 
+config SENSORS_BEL_PFE
+	tristate "Bel PFE Compatible Power Supplies"
+	help
+	  If you say yes here you get hardware monitoring support for BEL
+	  PFE1100 and PFE3000 Power Supplies.
+
+	  This driver can also be built as a module. If so, the module will
+	  be called bel-pfe.
+
 config SENSORS_IBM_CFFPS
 	tristate "IBM Common Form Factor Power Supply"
 	depends on LEDS_CLASS
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 03bacfcfd660..3f8c1014938b 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -6,6 +6,7 @@
 obj-$(CONFIG_PMBUS)		+= pmbus_core.o
 obj-$(CONFIG_SENSORS_PMBUS)	+= pmbus.o
 obj-$(CONFIG_SENSORS_ADM1275)	+= adm1275.o
+obj-$(CONFIG_SENSORS_BEL_PFE)	+= bel-pfe.o
 obj-$(CONFIG_SENSORS_IBM_CFFPS)	+= ibm-cffps.o
 obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
 obj-$(CONFIG_SENSORS_IR35221)	+= ir35221.o
diff --git a/drivers/hwmon/pmbus/bel-pfe.c b/drivers/hwmon/pmbus/bel-pfe.c
new file mode 100644
index 000000000000..117f9af21bf3
--- /dev/null
+++ b/drivers/hwmon/pmbus/bel-pfe.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for BEL PFE family power supplies.
+ *
+ * Copyright (c) 2019 Facebook Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include "pmbus.h"
+
+enum chips {pfe1100};
+
+static struct pmbus_driver_info pfe_driver_info[] = {
+	[pfe1100] = {
+		.pages = 1,
+		.format[PSC_VOLTAGE_IN] = linear,
+		.format[PSC_VOLTAGE_OUT] = linear,
+		.format[PSC_CURRENT_IN] = linear,
+		.format[PSC_CURRENT_OUT] = linear,
+		.format[PSC_POWER] = linear,
+		.format[PSC_TEMPERATURE] = linear,
+		.format[PSC_FAN] = linear,
+
+		.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
+			   PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
+			   PMBUS_HAVE_POUT |
+			   PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
+			   PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
+			   PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
+			   PMBUS_HAVE_STATUS_TEMP |
+			   PMBUS_HAVE_FAN12,
+	},
+};
+
+static int pfe_pmbus_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	int model;
+
+	model = (int)id->driver_data;
+	return pmbus_do_probe(client, id, &pfe_driver_info[model]);
+}
+
+static const struct i2c_device_id pfe_device_id[] = {
+	{"pfe1100", pfe1100},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, pfe_device_id);
+
+static struct i2c_driver pfe_pmbus_driver = {
+	.driver = {
+		   .name = "bel-pfe",
+	},
+	.probe = pfe_pmbus_probe,
+	.remove = pmbus_do_remove,
+	.id_table = pfe_device_id,
+};
+
+module_i2c_driver(pfe_pmbus_driver);
+
+MODULE_AUTHOR("Tao Ren <rentao.bupt@xxxxxxxxx>");
+MODULE_DESCRIPTION("PMBus driver for BEL PFE Family Power Supplies");
+MODULE_LICENSE("GPL");
-- 
2.17.1