linux-kernel - [PATCH 2/2] gpio: regmap: use new regmap_might

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Date:   Mon, 21 Nov 2022 16:08:43 +0100
From:   Michael Walle <michael@...le.cc>
To:     Mark Brown <broonie@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc:     linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        William Breathitt Gray <william.gray@...aro.org>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH 2/2] gpio: regmap: use new regmap_might_sleep()

Now that the regmap can be queried whether it might sleep, we can get
rid of the conservative setting "can_sleep = true". New drivers which
want to use gpio-regmap and can access the registers memory-mapped won't
have the restriction that their consumers have to use the
gpiod_*cansleep() variants anymore.

Signed-off-by: Michael Walle <michael@...le.cc>
---
 drivers/gpio/gpio-regmap.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
index 6383136cbe59..16404ca6ac38 100644
--- a/drivers/gpio/gpio-regmap.c
+++ b/drivers/gpio/gpio-regmap.c
@@ -249,15 +249,7 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config
 	chip->ngpio = config->ngpio;
 	chip->names = config->names;
 	chip->label = config->label ?: dev_name(config->parent);
-
-	/*
-	 * If our regmap is fast_io we should probably set can_sleep to false.
-	 * Right now, the regmap doesn't save this property, nor is there any
-	 * access function for it.
-	 * The only regmap type which uses fast_io is regmap-mmio. For now,
-	 * assume a safe default of true here.
-	 */
-	chip->can_sleep = true;
+	chip->can_sleep = regmap_might_sleep(config->regmap);
 
 	chip->get = gpio_regmap_get;
 	if (gpio->reg_set_base && gpio->reg_clr_base)
-- 
2.30.2