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34e17d4c05
It's only board-specific in that we've only needed it on snow so far. But by that logic, x86_power would be board specific because we've only needed it on link. No functionality change, just moving code between files and renaming the interface to indicate it's not board-specific. BUG=chrome-os-partner:18343 BRANCH=none TEST=build daisy,snow,spring Change-Id: I35debdaa71829d55a2fbc5d3c62b2aaf6e467633 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/45879
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* I2C arbitration for Chrome EC */
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#ifndef __CROS_EC_I2C_ARBITRATION_H
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#define __CROS_EC_I2C_ARBITRATION_H
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#include "common.h"
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#ifdef CONFIG_I2C_ARBITRATION
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/**
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* Claim an I2C port for use in master mode.
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*
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* If this function succeeds, you must later call i2c_release() to release the
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* claim.
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*
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* This function must not be called to claim an already-claimed port.
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*
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* @param port Port to claim (0 for first, 1 for second, etc.)
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* @return 0 if claimed successfully, -1 if it is in use
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*/
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int i2c_claim(int port);
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/**
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* Release an I2C port (after previously being claimed)
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*
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* This function must not be called to release an already-released port.
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*
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* @param port Port to claim (0 for first, 1 for second, etc.)
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*/
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void i2c_release(int port);
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#else
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static inline int i2c_claim(int port) { return EC_SUCCESS; }
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static inline void i2c_release(int port) {}
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#endif
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#endif /* __CROS_EC_I2C_ARBITRATION_H */
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