From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/hwmon/adt7310.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 drivers/hwmon/adt7310.c

(limited to 'drivers/hwmon/adt7310.c')

diff --git a/drivers/hwmon/adt7310.c b/drivers/hwmon/adt7310.c
new file mode 100644
index 000000000..5994cf68e
--- /dev/null
+++ b/drivers/hwmon/adt7310.c
@@ -0,0 +1,118 @@
+/*
+ * ADT7310/ADT7310 digital temperature sensor driver
+ *
+ * Copyright 2012-2013 Analog Devices Inc.
+ *   Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spi/spi.h>
+#include <asm/unaligned.h>
+
+#include "adt7x10.h"
+
+#define ADT7310_STATUS			0
+#define ADT7310_CONFIG			1
+#define ADT7310_TEMPERATURE		2
+#define ADT7310_ID			3
+#define ADT7310_T_CRIT			4
+#define ADT7310_T_HYST			5
+#define ADT7310_T_ALARM_HIGH		6
+#define ADT7310_T_ALARM_LOW		7
+
+static const u8 adt7310_reg_table[] = {
+	[ADT7X10_TEMPERATURE]   = ADT7310_TEMPERATURE,
+	[ADT7X10_STATUS]	= ADT7310_STATUS,
+	[ADT7X10_CONFIG]	= ADT7310_CONFIG,
+	[ADT7X10_T_ALARM_HIGH]	= ADT7310_T_ALARM_HIGH,
+	[ADT7X10_T_ALARM_LOW]	= ADT7310_T_ALARM_LOW,
+	[ADT7X10_T_CRIT]	= ADT7310_T_CRIT,
+	[ADT7X10_T_HYST]	= ADT7310_T_HYST,
+	[ADT7X10_ID]		= ADT7310_ID,
+};
+
+#define ADT7310_CMD_REG_OFFSET	3
+#define ADT7310_CMD_READ	0x40
+
+#define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)
+
+static int adt7310_spi_read_word(struct device *dev, u8 reg)
+{
+	struct spi_device *spi = to_spi_device(dev);
+
+	return spi_w8r16be(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
+}
+
+static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	u8 buf[3];
+
+	buf[0] = AD7310_COMMAND(reg);
+	put_unaligned_be16(data, &buf[1]);
+
+	return spi_write(spi, buf, sizeof(buf));
+}
+
+static int adt7310_spi_read_byte(struct device *dev, u8 reg)
+{
+	struct spi_device *spi = to_spi_device(dev);
+
+	return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
+}
+
+static int adt7310_spi_write_byte(struct device *dev, u8 reg,
+	u8 data)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	u8 buf[2];
+
+	buf[0] = AD7310_COMMAND(reg);
+	buf[1] = data;
+
+	return spi_write(spi, buf, sizeof(buf));
+}
+
+static const struct adt7x10_ops adt7310_spi_ops = {
+	.read_word = adt7310_spi_read_word,
+	.write_word = adt7310_spi_write_word,
+	.read_byte = adt7310_spi_read_byte,
+	.write_byte = adt7310_spi_write_byte,
+};
+
+static int adt7310_spi_probe(struct spi_device *spi)
+{
+	return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, spi->irq,
+			&adt7310_spi_ops);
+}
+
+static int adt7310_spi_remove(struct spi_device *spi)
+{
+	return adt7x10_remove(&spi->dev, spi->irq);
+}
+
+static const struct spi_device_id adt7310_id[] = {
+	{ "adt7310", 0 },
+	{ "adt7320", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, adt7310_id);
+
+static struct spi_driver adt7310_driver = {
+	.driver = {
+		.name	= "adt7310",
+		.owner	= THIS_MODULE,
+		.pm	= ADT7X10_DEV_PM_OPS,
+	},
+	.probe		= adt7310_spi_probe,
+	.remove		= adt7310_spi_remove,
+	.id_table	= adt7310_id,
+};
+module_spi_driver(adt7310_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("ADT7310/ADT7320 driver");
+MODULE_LICENSE("GPL");
-- 
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