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ioexpander: add support for pcf8575 expander

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This adds support for 16 bit io expander pcf8575. The driver is basically
the same as for pcf8574 however it is for 16 bits instead of 8 bits. Since
pcf8575 and pcf8574 can be both used on the same i2c bus the driver for
pcf8575 is implemented in a different file to reduce the code size
and complexity and to have less if statements in the driver.

Signed-off-by: Michal Lenc <michallenc@seznam.cz>
This commit is contained in:
Michal Lenc
2023-08-01 16:25:06 +02:00
committed by Xiang Xiao
parent 580d09b5a1
commit bf90361895
5 changed files with 865 additions and 0 deletions
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drivers/ioexpander/Kconfig
+19
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@@ -297,6 +297,25 @@ config PCF8574_INT_POLLDELAY
endif # IOEXPANDER_PCF8574
config IOEXPANDER_PCF8575
bool "PCF8575 I2C IO expander"
default n
depends on I2C
---help---
Enable support for 16 bit PCF8575 IO Expander. Software driver
interrupt is currently not supported therefore decated HW interrupt
pin should be used.
if IOEXPANDER_PCF8575
config PCF8575_MULTIPLE
bool "Multiple PCF8575 Devices"
default n
---help---
Can be defined to support multiple PCF8575 devices on board.
endif # IOEXPANDER_PCF8575
config IOEXPANDER_SX1509
bool "SX1509 I2C IO expander"
default n