i2c: Add support for the PCF8575 chip

[powerpc.git] / drivers / i2c / chips / Kconfig

diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index 2e1c24f..17702b3 100644 (file)
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -57,7 +57,7 @@ config SENSORS_PCF8574
        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 @@ config SENSORS_PCF8574
          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