forked from Imagelibrary/rtems
2c4e3ab117
The two RTCs supported by that driver (MCP7940M and EOZ9) use slightly different register order. Add support for a different order to the i2c-rtc driver.
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup shared_tod_mcp7940m_rtc
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*
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* @brief This file provides the interfaces of @ref shared_tod_mcp7940m_rtc.
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*/
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/*
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* Copyright (C) 2023 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef LIBCHIP_MCP7940M_RTC_H
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#define LIBCHIP_MCP7940M_RTC_H
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#include <libchip/i2c-rtc.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/**
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* @defgroup shared_tod_mcp7940m_rtc
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*
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* @ingroup shared_tod_i2c_rtc
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*
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* @brief RTC driver for the MCP7940M
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*
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* To use this driver, use the following initialization:
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*
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* Define a context for the RTC somewhere:
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*
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* static struct mcp7940m_rtc rtc_ctx =
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* MCP7940M_RTC_INITIALIZER("/dev/i2c-1", 0x6F, true);
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*
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* Then you can use the following for the RTC_Table:
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*
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* MCP7940M_RTC_TBL_ENTRY("/dev/rtc", &rtc_ctx)
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*
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* @{
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*/
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struct mcp7940m_rtc {
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struct i2c_rtc_base base;
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/** True if a crystal should be used. False if an oscillator is connected. */
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bool crystal;
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};
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/** Hardware init. Used internally. */
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int mcp7940m_hw_init(struct i2c_rtc_base *base);
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#define MCP7940M_RTC_INITIALIZER(i2c_path, i2c_address, has_crystal) { \
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.base = I2C_RTC_INITIALIZER( \
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i2c_path, \
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i2c_address, \
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0, \
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I2C_RTC_ORDER_sec_min_hour_wkday_day_month_year, \
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"mcp7940", \
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mcp7940m_hw_init), \
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.crystal = has_crystal, \
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}
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#define MCP7940M_RTC_TBL_ENTRY(dev_name, mcp7940m_rtc_ctx) \
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I2C_RTC_TBL_ENTRY(dev_name, mcp7940m_rtc_ctx)
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/** @} */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* LIBCHIP_MCP7940M_RTC_H */
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