i2c: Add support for the PCF8575 chip
Signed-off-by: Bart Van Assche <bart.vanassche@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index 2e1c24f..17702b3 100644
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -57,7 +57,7 @@
default n
help
If you say yes here you get support for Philips PCF8574 and
- PCF8574A chips.
+ PCF8574A chips. These chips are 8-bit I/O expanders for the I2C bus.
This driver can also be built as a module. If so, the module
will be called pcf8574.
@@ -65,6 +65,20 @@
These devices are hard to detect and rarely found on mainstream
hardware. If unsure, say N.
+config PCF8575
+ tristate "Philips PCF8575"
+ default n
+ help
+ If you say yes here you get support for Philips PCF8575 chip.
+ This chip is a 16-bit I/O expander for the I2C bus. Several other
+ chip manufacturers sell equivalent chips, e.g. Texas Instruments.
+
+ This driver can also be built as a module. If so, the module
+ will be called pcf8575.
+
+ This device is hard to detect and is rarely found on mainstream
+ hardware. If unsure, say N.
+
config SENSORS_PCA9539
tristate "Philips PCA9539 16-bit I/O port"
depends on EXPERIMENTAL