gpio: pca953x handles more chips, i2c fault codes

Minor updates to the pca953x GPIO expander driver: handle several more
compatible parts, and stop assuming that the I2C layer's return codes are
garbage (that's now been fixed).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 48f49d93d249..3d2565441b36 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -95,7 +95,7 @@ config GPIO_MAX732X
           number for these GPIOs.
 
 config GPIO_PCA953X
-        tristate "PCA953x, PCA955x, and MAX7310 I/O ports"
+        tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
         depends on I2C
         help
           Say yes here to provide access to several register-oriented
@@ -104,9 +104,10 @@ config GPIO_PCA953X
 
           4 bits:       pca9536, pca9537
 
-          8 bits:       max7310, pca9534, pca9538, pca9554, pca9557
+          8 bits:       max7310, pca9534, pca9538, pca9554, pca9557,
+                        tca6408
 
-          16 bits:      pca9535, pca9539, pca9555
+          16 bits:      pca9535, pca9539, pca9555, tca6416
 
           This driver can also be built as a module.  If so, the module
           will be called pca953x.