Patch "pinctrl: at91-pio4: fix pull-up/down logic" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

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

    pinctrl: at91-pio4: fix pull-up/down logic

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:
     pinctrl-at91-pio4-fix-pull-up-down-logic.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 5305a7b7e860bb40ab226bc7d58019416073948a Mon Sep 17 00:00:00 2001
From: Ludovic Desroches <ludovic.desroches@atmel.com>
Date: Tue, 19 Apr 2016 16:03:45 +0200
Subject: pinctrl: at91-pio4: fix pull-up/down logic

From: Ludovic Desroches <ludovic.desroches@atmel.com>

commit 5305a7b7e860bb40ab226bc7d58019416073948a upstream.

The default configuration of a pin is often with a value in the
pull-up/down field at chip reset. So, even if the internal logic of the
controller prevents writing a configuration with pull-up and pull-down at
the same time, we must ensure explicitly this condition before writing the
register.

This was leading to a pull-down condition not taken into account for
instance.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: 776180848b57 ("pinctrl: introduce driver for Atmel PIO4 controller")
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pinctrl/pinctrl-at91-pio4.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -717,9 +717,11 @@ static int atmel_conf_pin_config_group_s
 			break;
 		case PIN_CONFIG_BIAS_PULL_UP:
 			conf |= ATMEL_PIO_PUEN_MASK;
+			conf &= (~ATMEL_PIO_PDEN_MASK);
 			break;
 		case PIN_CONFIG_BIAS_PULL_DOWN:
 			conf |= ATMEL_PIO_PDEN_MASK;
+			conf &= (~ATMEL_PIO_PUEN_MASK);
 			break;
 		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 			if (arg == 0)


Patches currently in stable-queue which might be from ludovic.desroches@atmel.com are

queue-4.4/pinctrl-at91-pio4-fix-pull-up-down-logic.patch