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dm: i2c: Provide an offset length parameter where needed

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Rather than assuming that the chip offset length is 1, allow it to be
provided. This allows chips that don't use the default offset length to
be used (at present they are only supported by the command line 'i2c'
command which sets the offset length explicitly).

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Simon Glass
2015-01-25 08:26:55 -07:00
parent 73845350b6
commit 25ab4b0303
12 changed files with 32 additions and 26 deletions
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8
include/i2c.h
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@ -388,10 +388,12 @@ struct dm_i2c_ops {
*
* @bus: Bus to examine
* @chip_addr: Chip address for the new device
* @offset_len: Length of a register offset in bytes (normally 1)
* @devp: Returns pointer to new device if found or -ENODEV if not
* found
*/
int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp);
int i2c_get_chip(struct udevice *bus, uint chip_addr, uint offset_len,
struct udevice **devp);
/**
* i2c_get_chip() - get a device to use to access a chip on a bus number
@ -401,10 +403,12 @@ int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp);
*
* @busnum: Bus number to examine
* @chip_addr: Chip address for the new device
* @offset_len: Length of a register offset in bytes (normally 1)
* @devp: Returns pointer to new device if found or -ENODEV if not
* found
*/
int i2c_get_chip_for_busnum(int busnum, int chip_addr, struct udevice **devp);
int i2c_get_chip_for_busnum(int busnum, int chip_addr, uint offset_len,
struct udevice **devp);
/**
* i2c_chip_ofdata_to_platdata() - Decode standard I2C platform data