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 4.7-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-4.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a246b8198f776a16d1d3a3bbfc2d437bad766b29 Mon Sep 17 00:00:00 2001
From: Vignesh R <vigneshr@xxxxxx>
Date: Thu, 9 Jun 2016 11:02:04 +0530
Subject: gpio: pca953x: Fix NBANK calculation for PCA9536
From: Vignesh R <vigneshr@xxxxxx>
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@xxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -90,7 +90,7 @@ 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@xxxxxx are
queue-4.7/gpio-pca953x-fix-nbank-calculation-for-pca9536.patch
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