zephyr

Commit Graph

Author	SHA1	Message	Date
Daniel Leung	b96703b516	gpio: pcal9535a: cache write values to registers Register values are now being cached in memory, and are being used in subsequent writes. This is to avoid reading from registers, as we know what needs to be written to those registers all the time. Change-Id: I9b344303c0cb9f28e974514ab674135004f68ea0 Signed-off-by: Daniel Leung <daniel.leung@intel.com>	2016-02-05 20:24:19 -05:00
Daniel Leung	2709050112	gpio: add driver for PCAL9535A GPIO chip This adds the driver for I2C-based PCAL9535A GPIO chip. This currently only enables minimal set of features of the chip for very simple input/output operations, and does not support interrupt yet. Change-Id: I32ea07a71a38866280a96e68cff49cb0df12b85d Signed-off-by: Daniel Leung <daniel.leung@intel.com>	2016-02-05 20:24:18 -05:00

Author

SHA1

Message

Date

Daniel Leung

b96703b516

gpio: pcal9535a: cache write values to registers

Register values are now being cached in memory, and are being used in
subsequent writes. This is to avoid reading from registers, as
we know what needs to be written to those registers all the time.

Change-Id: I9b344303c0cb9f28e974514ab674135004f68ea0
Signed-off-by: Daniel Leung <daniel.leung@intel.com>

2016-02-05 20:24:19 -05:00

Daniel Leung

2709050112

gpio: add driver for PCAL9535A GPIO chip

This adds the driver for I2C-based PCAL9535A GPIO chip.
This currently only enables minimal set of features of the chip for
very simple input/output operations, and does not support interrupt
yet.

Change-Id: I32ea07a71a38866280a96e68cff49cb0df12b85d
Signed-off-by: Daniel Leung <daniel.leung@intel.com>

2016-02-05 20:24:18 -05:00

2 Commits