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@xxxxxxxxxxxxxxx> know about it. >From 5305a7b7e860bb40ab226bc7d58019416073948a Mon Sep 17 00:00:00 2001 From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx> Date: Tue, 19 Apr 2016 16:03:45 +0200 Subject: pinctrl: at91-pio4: fix pull-up/down logic From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx> 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@xxxxxxxxx> Fixes: 776180848b57 ("pinctrl: introduce driver for Atmel PIO4 controller") Acked-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx> Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxx are queue-4.4/pinctrl-at91-pio4-fix-pull-up-down-logic.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html