Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 164 insertions, 0 deletions

diff --git a/drivers/hwmon/adt7310.c b/drivers/hwmon/adt7310.c
new file mode 100644
index 0000000000..067865f488
--- /dev/null
+++ b/drivers/hwmon/adt7310.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ADT7310/ADT7310 digital temperature sensor driver
+ *
+ * Copyright 2012-2013 Analog Devices Inc.
+ *   Author: Lars-Peter Clausen <lars@metafoo.de>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/regmap.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 spi_device *spi, u8 reg)
+{
+	return spi_w8r16be(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
+}
+
+static int adt7310_spi_write_word(struct spi_device *spi, u8 reg, u16 data)
+{
+	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 spi_device *spi, u8 reg)
+{
+	return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
+}
+
+static int adt7310_spi_write_byte(struct spi_device *spi, u8 reg, u8 data)
+{
+	u8 buf[2];
+
+	buf[0] = AD7310_COMMAND(reg);
+	buf[1] = data;
+
+	return spi_write(spi, buf, sizeof(buf));
+}
+
+static bool adt7310_regmap_is_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case ADT7X10_TEMPERATURE:
+	case ADT7X10_STATUS:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static int adt7310_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+	struct spi_device *spi = context;
+	int regval;
+
+	switch (reg) {
+	case ADT7X10_TEMPERATURE:
+	case ADT7X10_T_ALARM_HIGH:
+	case ADT7X10_T_ALARM_LOW:
+	case ADT7X10_T_CRIT:
+		regval = adt7310_spi_read_word(spi, reg);
+		break;
+	default:
+		regval = adt7310_spi_read_byte(spi, reg);
+		break;
+	}
+	if (regval < 0)
+		return regval;
+	*val = regval;
+	return 0;
+}
+
+static int adt7310_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+	struct spi_device *spi = context;
+	int ret;
+
+	switch (reg) {
+	case ADT7X10_TEMPERATURE:
+	case ADT7X10_T_ALARM_HIGH:
+	case ADT7X10_T_ALARM_LOW:
+	case ADT7X10_T_CRIT:
+		ret = adt7310_spi_write_word(spi, reg, val);
+		break;
+	default:
+		ret = adt7310_spi_write_byte(spi, reg, val);
+		break;
+	}
+	return ret;
+}
+
+static const struct regmap_config adt7310_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.cache_type = REGCACHE_RBTREE,
+	.volatile_reg = adt7310_regmap_is_volatile,
+	.reg_read = adt7310_reg_read,
+	.reg_write = adt7310_reg_write,
+};
+
+static int adt7310_spi_probe(struct spi_device *spi)
+{
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init(&spi->dev, NULL, spi, &adt7310_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, spi->irq,
+			     regmap);
+}
+
+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",
+		.pm	= pm_sleep_ptr(&adt7x10_dev_pm_ops),
+	},
+	.probe		= adt7310_spi_probe,
+	.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");