[PATCH v3] gpio: gpio-pca953x: no interrupts with 4-bit devices

[mrpace2@xxxxxxxxx]

Ah, I didn't know about DIV_ROUND_UP(). I also didn't read Alexander's 
response correctly. Sorry about that. DIV_ROUND_UP() is essentially what 
he proposed, and it's also correct for ngpio==0.

So here's the third version of my trivial patch.

Signed-off-by: Frank Edelhaeuser <mrpace2 <at> gmail.com>
---
diff -Nur a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
--- a/drivers/gpio/gpio-pca953x.c 2016-03-10 19:11:37.799908602 +0000
+++ b/drivers/gpio/gpio-pca953x.c 2016-03-10 19:11:09.635412539 +0000
@@ -86,7 +86,7 @@
 #define MAX_BANK 5
 #define BANK_SZ 8

-#define NBANK(chip) (chip->gpio_chip.ngpio / BANK_SZ)
+#define NBANK(chip) (DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ))

 struct pca953x_chip {
  unsigned gpio_start;


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