gpio: pca953x: define masks for addressing common and extended registers

These mask bits are to be used to map the extended register
addresses (which are defined for an unsupported 8-bit pcal chip)
to 16 and 24 bit chips (pcal6524).

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index ae9b1ed769515337d9c9b007a4b2b006af1b4db6..06ef9c36764e64d47b5ac58529e60e0105294290 100644 (file)
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -56,6 +56,10 @@
 #define PCAL6524_DEBOUNCE      0x2d
 
 #define PCA_GPIO_MASK          0x00FF
+
+#define PCAL_GPIO_MASK         0x1f
+#define PCAL_PINCTRL_MASK      0xe0
+
 #define PCA_INT                        0x0100
 #define PCA_PCAL               0x0200
 #define PCA_LATCH_INT (PCA_PCAL | PCA_INT)