Yeah, while the ->add_pin_ranges() shouldn't be used by DT drivers, this one requires it to support quite old firmware descriptions that do not have gpio-ranges property. The change allows to clean up GPIO library from OF specifics. There is no functional change intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- v2: fixed compilation issues (LKP), Cc'ed to the author of original code Btw, the commit d2b67744fd99 ("pinctrl: bcm2835: implement hook for missing gpio-ranges") seems problematic in the fist place due to odd of_node_put() call. I dunno how that part had been tested, or how it's supposed to work, i.e. where is the counterpart of_node_get(). Anyway this change drops it for good. Perhaps we can check gpio-ranges property presence inside the GPIO library, so this ->add_pin_ranges() won't be called at all. Also I would like to understand the dance around checking for pin control device. The original commit lacks of comments in the non-trivial code. drivers/pinctrl/bcm/pinctrl-bcm2835.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c index 7857e612a100..29f278c49103 100644 --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c @@ -358,16 +358,17 @@ static int bcm2835_gpio_direction_output(struct gpio_chip *chip, return 0; } -static int bcm2835_of_gpio_ranges_fallback(struct gpio_chip *gc, - struct device_node *np) +static int bcm2835_add_pin_ranges_fallback(struct gpio_chip *gc) { + struct device_node *np = dev_of_node(gc->parent); struct pinctrl_dev *pctldev = of_pinctrl_get(np); - of_node_put(np); - if (!pctldev) return 0; + if (of_property_read_bool(np, "gpio-ranges")) + return 0; + gpiochip_add_pin_range(gc, pinctrl_dev_get_devname(pctldev), 0, 0, gc->ngpio); @@ -388,7 +389,7 @@ static const struct gpio_chip bcm2835_gpio_chip = { .base = -1, .ngpio = BCM2835_NUM_GPIOS, .can_sleep = false, - .of_gpio_ranges_fallback = bcm2835_of_gpio_ranges_fallback, + .add_pin_ranges = bcm2835_add_pin_ranges_fallback, }; static const struct gpio_chip bcm2711_gpio_chip = { @@ -405,7 +406,7 @@ static const struct gpio_chip bcm2711_gpio_chip = { .base = -1, .ngpio = BCM2711_NUM_GPIOS, .can_sleep = false, - .of_gpio_ranges_fallback = bcm2835_of_gpio_ranges_fallback, + .add_pin_ranges = bcm2835_add_pin_ranges_fallback, }; static void bcm2835_gpio_irq_handle_bank(struct bcm2835_pinctrl *pc, -- 2.39.0