From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 5 Jun 2020 13:40:36 +0000 (+0300)
Subject: gpio: pca953x: disable regmap locking for automatic address incrementing
X-Git-Tag: v5.7.10~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a073671be2a1459a4b92985c839feafc33c0df57;p=thirdparty%2Fkernel%2Fstable.git

gpio: pca953x: disable regmap locking for automatic address incrementing

commit ec3decd21380081e3b5de4ba8d85d90a95f201a0 upstream.

It's a repetition of the commit aa58a21ae378
  ("gpio: pca953x: disable regmap locking")
which states the following:

  This driver uses its own locking but regmap silently uses
  a mutex for all operations too. Add the option to disable
  locking to the regmap config struct.

Fixes: bcf41dc480b1 ("gpio: pca953x: fix handling of automatic address incrementing")
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 48bea0997e70c..374b772150a65 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -399,6 +399,7 @@ static const struct regmap_config pca953x_ai_i2c_regmap = {
 	.writeable_reg = pca953x_writeable_register,
 	.volatile_reg = pca953x_volatile_register,
 
+	.disable_locking = true,
 	.cache_type = REGCACHE_RBTREE,
 	.max_register = 0x7f,
 };