diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-03-24 14:32:11 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2020-03-24 21:58:51 +0100 |
| commit | e6282fc6f889debe4d6eb6332dc6e49739faa5cb (patch) | |
| tree | fcc3c4318f15e244889fddf3bcd93029f39e3ca4 /include/linux/i2c.h | |
| parent | e7c69fd3cc534440491c473ec630a085d000d18f (diff) | |
i2c: core: Provide generic definitions for bus frequencies
There are few maximum bus frequencies being used in the I²C core code.
Provide generic definitions for bus frequencies and use them in the core.
The drivers may use predefined constants where it is appropriate.
Some of them are already using these under slightly different names.
We will convert them later to use newly introduced defines.
Note, the name of modes are chosen to follow well established naming
scheme [1].
These definitions will also help to avoid typos in the numbers that
may lead to subtle errors.
[1]: https://en.wikipedia.org/wiki/I%C2%B2C#Differences_between_modes
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include/linux/i2c.h')
| -rw-r--r-- | include/linux/i2c.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index f834687989f7..72e759328cee 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -39,6 +39,14 @@ enum i2c_slave_event; typedef int (*i2c_slave_cb_t)(struct i2c_client *client, enum i2c_slave_event event, u8 *val); +/* I2C Frequency Modes */ +#define I2C_MAX_STANDARD_MODE_FREQ 100000 +#define I2C_MAX_FAST_MODE_FREQ 400000 +#define I2C_MAX_FAST_MODE_PLUS_FREQ 1000000 +#define I2C_MAX_TURBO_MODE_FREQ 1400000 +#define I2C_MAX_HIGH_SPEED_MODE_FREQ 3400000 +#define I2C_MAX_ULTRA_FAST_MODE_FREQ 5000000 + struct module; struct property_entry; |