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i2c: Cleanup dts clock-frequency property usage

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Clarify that the clock-frequency is the bitrate at boot and introduce
defines that .dts files can use to set the clock-frequency.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2017-08-10 11:22:24 -05:00 • committed by Kumar Gala
commit 670fc3230d
2 changed files with 16 additions and 1 deletions
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2
dts/common/yaml/i2c.yaml
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@ -18,7 +18,7 @@ properties:
- clock-frequency : - clock-frequency :
type: int type: int
category: optional category: optional
description: Maximum I2C bus clock frequency in Hz description: Initial clock frequency in Hz
generation: define generation: define
- clocks: - clocks:
type: array type: array

15
include/dt-bindings/i2c/i2c.h Normal file
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@ -0,0 +1,15 @@
/*
* Copyright (c) 2017 Linaro Limited
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __DT_BINDINGS_I2C_I2C_H
#define __DT_BINDINGS_I2C_I2C_H
#define I2C_BITRATE_STANDARD 100000 /* 100 Kbit/s */
#define I2C_BITRATE_FAST 400000 /* 400 Kbit/s */
#define I2C_BITRATE_FAST_PLUS 1000000 /* 1 Mbit/s */
#define I2C_BITRATE_HIGH 3400000 /* 3.4 Mbit/s */
#define I2C_BITRATE_ULTRA 5000000 /* 5 Mbit/s */
#endif /* __DT_BINDINGS_I2C_I2C_H */