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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>
This commit is contained in:
H. Nikolaus Schaller 2018-05-17 06:59:48 +02:00 committed by Linus Walleij
parent 0cdf21b34e
commit 394aeef83c
1 changed files with 4 additions and 0 deletions
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4
drivers/gpio/gpio-pca953x.c
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@ -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)