103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __SENSOR_MCP9808_H__
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#define __SENSOR_MCP9808_H__
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#include <errno.h>
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#include <stdint.h>
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#include <device.h>
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#include <sensor.h>
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#include <misc/util.h>
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#ifndef CONFIG_SENSOR_DEBUG
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#define DBG(...) { ; }
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#else
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#include <misc/printk.h>
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#define DBG printk
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#endif /* CONFIG_SENSOR_DEBUG */
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#define MCP9808_REG_CONFIG 0x01
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#define MCP9808_REG_UPPER_LIMIT 0x02
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#define MCP9808_REG_LOWER_LIMIT 0x03
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#define MCP9808_REG_CRITICAL 0x04
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#define MCP9808_REG_TEMP_AMB 0x05
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#define MCP9808_ALERT_INT BIT(0)
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#define MCP9808_ALERT_CNT BIT(3)
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#define MCP9808_INT_CLEAR BIT(5)
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#define MCP9808_SIGN_BIT BIT(12)
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#define MCP9808_TEMP_INT_MASK 0x0ff0
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#define MCP9808_TEMP_INT_SHIFT 4
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#define MCP9808_TEMP_FRAC_MASK 0x000f
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#define MCP9808_TEMP_MAX 0xffc
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struct mcp9808_data {
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struct device *i2c_master;
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uint16_t i2c_slave_addr;
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uint16_t reg_val;
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#ifdef CONFIG_MCP9808_TRIGGER_OWN_FIBER
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struct nano_sem sem;
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#endif
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#ifdef CONFIG_MCP9808_TRIGGER_GLOBAL_FIBER
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struct sensor_work work;
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#endif
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#ifdef CONFIG_MCP9808_TRIGGER
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struct sensor_trigger trig;
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sensor_trigger_handler_t trigger_handler;
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#endif
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};
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int mcp9808_reg_read(struct mcp9808_data *data, uint8_t reg, uint16_t *val);
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#ifdef CONFIG_MCP9808_TRIGGER
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int mcp9808_attr_set(struct device *dev, enum sensor_channel chan,
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enum sensor_attribute attr,
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const struct sensor_value *val);
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int mcp9808_trigger_set(struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler);
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void mcp9808_setup_interrupt(struct device *dev);
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#else
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static inline int mcp9808_attr_set(struct device *dev,
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enum sensor_channel chan,
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enum sensor_attribute attr,
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const struct sensor_value *val)
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{
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return -ENOTSUP;
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}
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static inline int mcp9808_trigger_set(struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler)
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{
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return -ENOTSUP;
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}
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static void mcp9808_setup_interrupt(struct device *dev)
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{
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}
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#endif /* CONFIG_MCP9808_TRIGGER */
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#endif /* __SENSOR_MCP9808_H__ */
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