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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/hwmon/adt7310.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hwmon/adt7310.c')
-rw-r--r--drivers/hwmon/adt7310.c164
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");