[PATCH linux dev-4.10] drivers/hwmon/pmbus: Add IBM P178531 driver

[Eddie James]

From: "Edward A. James" <eajames at us.ibm.com>

Add the driver to monitor power supply with hwmon.

Signed-off-by: Edward A. James <eajames at us.ibm.com>
---
 drivers/hwmon/pmbus/Kconfig  | 10 ++++++
 drivers/hwmon/pmbus/Makefile |  1 +
 drivers/hwmon/pmbus/p17531.c | 81 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 drivers/hwmon/pmbus/p17531.c

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 68d717a..808ef2f 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -125,6 +125,16 @@ config SENSORS_MAX8688
 	  This driver can also be built as a module. If so, the module will
 	  be called max8688.
 
+config SENSORS_P17531
+	tristate "IBM P17531"
+	default n
+	help
+	  If you say yes here you get hardware monitoring support for IBM
+	  P17531 power supply.
+
+	  This driver can also be built as a module. If so, the module will
+	  be called p17531.
+
 config SENSORS_TPS40422
 	tristate "TI TPS40422"
 	default n
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 75bb7ca..f43628f 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_SENSORS_MAX16064)	+= max16064.o
 obj-$(CONFIG_SENSORS_MAX20751)	+= max20751.o
 obj-$(CONFIG_SENSORS_MAX34440)	+= max34440.o
 obj-$(CONFIG_SENSORS_MAX8688)	+= max8688.o
+obj-$(CONFIG_SENSORS_P17531)	+= p17531.o
 obj-$(CONFIG_SENSORS_TPS40422)	+= tps40422.o
 obj-$(CONFIG_SENSORS_UCD9000)	+= ucd9000.o
 obj-$(CONFIG_SENSORS_UCD9200)	+= ucd9200.o
diff --git a/drivers/hwmon/pmbus/p17531.c b/drivers/hwmon/pmbus/p17531.c
new file mode 100644
index 0000000..ae6a19f
--- /dev/null
+++ b/drivers/hwmon/pmbus/p17531.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2017 IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+
+#include "pmbus.h"
+
+static struct pmbus_driver_info p17531_info = {
+	.pages = 1,
+	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
+		PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
+		PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
+		PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
+		PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,
+};
+
+static ssize_t p17531_clear_fault(struct device *dev,
+				  struct device_attribute *dev_attr,
+				  const char *buf, size_t count)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+
+	pmbus_clear_faults(client);
+
+	return count;
+}
+
+static DEVICE_ATTR(clear_fault, 0200, NULL, p17531_clear_fault);
+
+static int p17531_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int rc;
+
+	rc = pmbus_do_probe(client, id, &p17531_info);
+	if (rc < 0)
+		return rc;
+
+	rc = device_create_file(&client->dev, &dev_attr_clear_fault);
+
+	return rc;
+}
+
+static int p17531_remove(struct i2c_client *client)
+{
+	device_remove_file(&client->dev, &dev_attr_clear_fault);
+
+	return pmbus_do_remove(client);
+}
+
+enum chips { p17531 };
+
+static const struct i2c_device_id p17531_id[] = {
+	{ "p17531", p17531 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, p17531_id);
+
+static struct i2c_driver p17531_driver = {
+	.driver = {
+		.name = "p17531",
+	},
+	.probe = p17531_probe,
+	.remove = p17531_remove,
+	.id_table = p17531_id,
+};
+
+module_i2c_driver(p17531_driver);
+
+MODULE_AUTHOR("Eddie James");
+MODULE_DESCRIPTION("PMBus driver for IBM P17531");
+MODULE_LICENSE("GPL");
-- 
1.8.3.1