gpio: sx150x: add Semtech I2C sx150x gpio expander driver

Add support for Semtech SX150-series I2C GPIO expanders.  Compatible
models include:

8 bits:  sx1508q
16 bits: sx1509q

Signed-off-by: Gregory Bean <gbean@codeaurora.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Trilok Soni <tsoni@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 7face915b963..f623953b5797 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -195,6 +195,17 @@ config GPIO_PCF857X
           This driver provides an in-kernel interface to those GPIOs using
           platform-neutral GPIO calls.
 
+config GPIO_SX150X
+        bool "Semtech SX150x I2C GPIO expander"
+        depends on I2C=y
+        default n
+        help
+          Say yes here to provide support for Semtech SX150-series I2C
+          GPIO expanders. Compatible models include:
+
+          8 bits:  sx1508q
+          16 bits: sx1509q
+
 config GPIO_TC35892
         bool "TC35892 GPIOs"
         depends on MFD_TC35892