u-boot.git/drivers/i2c/i2c-uclass.c, branch v2016.01

dm: i2c: Add a function to transfer messages

2015-08-06T02:57:51+00:00

Sometimes it is useful to be able to transfer a raw I2C message. This
happens when the chip address needs to be set manually, or when the data to
be sent/received is in another buffer.

Add a function to provide access to this.

Signed-off-by: Simon Glass 
Acked-by: Heiko Schocher

dm: i2c: Add a message debug function

2015-08-06T02:57:51+00:00

Add a way to dump the contents of an I2C message for debugging purposes.

Signed-off-by: Simon Glass 
Acked-by: Heiko Schocher

dm: i2c: Add a function to find out the chip offset length

2015-05-15T00:49:33+00:00

We can currently set this but there is no API function to get it. Add one.

Signed-off-by: Simon Glass 
Reviewed-by: Joe Hershberger 
Acked-by: Heiko Schocher

dm: i2c: Add functions to read and write a register

2015-05-06T02:58:19+00:00

Add driver model versions of the legacy functions to read and write a
single byte register. These are a useful shortcut in many cases.

Signed-off-by: Simon Glass 
Acked-by: Heiko Schocher

dm: core: Add dev_get_uclass_priv() to access uclass private data

2015-04-17T01:27:42+00:00

Add a convenience function to access the private data that a uclass stores
for each of its devices. Convert over most existing uses for consistency
and to provide an example for others.

Signed-off-by: Simon Glass

dm: i2c: Add a missing memory allocaton check

2015-03-06T02:13:35+00:00

This strdup() is missing a check. Add it.

Signed-off-by: Simon Glass 
Acked-by: Heiko Schocher

dm: i2c: Add a dm_ prefix to driver model bus speed functions

2015-02-12T17:35:33+00:00

As with i2c_read() and i2c_write(), add a dm_ prefix to the driver model
versions of these functions to avoid conflicts.

Signed-off-by: Simon Glass 
Acked-by: Heiko Schocher

dm: i2c: dts: Support an offset-len device tree property

2015-01-30T00:10:01+00:00

Since U-Boot can support different offset lengths (0-4 bytes), add a device
tree property to specify this. This avoids hard-coding it in the driver.

Signed-off-by: Simon Glass

dm: i2c: Move slave details to child platdata

2015-01-30T00:09:56+00:00

At present we go through various contortions to store the I2C's chip
address in its private data. This only exists when the chip is active so
must be set up when it is probed. Until the device is probed we don't
actually record what address it will appear on.

However, now that we can support per-child platform data, we can use that
instead. This allows us to set up the address when the child is bound,
and avoid the messy contortions.

Unfortunately this is a fairly large change and it seems to be difficult to
break it down further.

Signed-off-by: Simon Glass 
Reviewed-by: Masahiro Yamada

dm: core: Add a flag to control sequence numbering

2015-01-30T00:09:55+00:00

At present we try to use the 'reg' property and device tree aliases to give
devices a sequence number. The 'reg' property is often actually a memory
address, so the sequence numbers thus-obtained are not useful. It would be
better if the devices were just sequentially numbered in that case. In fact
neither I2C nor SPI use this feature, so drop it.

Some devices need us to look up an alias to number them within the uclass.
Add a flag to control this, so it is not done unless it is needed.

Adjust the tests to test this new behaviour.

Signed-off-by: Simon Glass 
Reviewed-by: Masahiro Yamada