Patch "gpio: pca953x: Fix NBANK calculation for PCA9536" has been added to the 4.4-stable tree

Patch "gpio: pca953x: Fix NBANK calculation for PCA9536" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    gpio: pca953x: Fix NBANK calculation for PCA9536

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpio-pca953x-fix-nbank-calculation-for-pca9536.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From a246b8198f776a16d1d3a3bbfc2d437bad766b29 Mon Sep 17 00:00:00 2001
From: Vignesh R <vigneshr@ti.com>
Date: Thu, 9 Jun 2016 11:02:04 +0530
Subject: gpio: pca953x: Fix NBANK calculation for PCA9536

From: Vignesh R <vigneshr@ti.com>

commit a246b8198f776a16d1d3a3bbfc2d437bad766b29 upstream.

NBANK() macro assumes that ngpios is a multiple of 8(BANK_SZ) and
hence results in 0 banks for PCA9536 which has just 4 gpios. This is
wrong as PCA9356 has 1 bank with 4 gpios. This results in uninitialized
PCA953X_INVERT register. Fix this by using DIV_ROUND_UP macro in
NBANK().

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpio/gpio-pca953x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -86,7 +86,7 @@ MODULE_DEVICE_TABLE(acpi, pca953x_acpi_i
 #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;


Patches currently in stable-queue which might be from vigneshr@ti.com are

queue-4.4/gpio-pca953x-fix-nbank-calculation-for-pca9536.patch