Commit c420619d authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Linus Walleij
Browse files

pinctrl: pinconf: remove checks on ops->pin_config_get 



ops->pin_config_get() is only used in one specific path that will only be taken
for generic pinconf drivers (ops->is_generic == true) when dumping the pinconf
by using debugfs.

By removing the check in pinconf_check_ops(), let's stop pressuring people to
write a pin_config_get() function that will never be used and so will probably
never be tested.

Removing the check in pinconf_pins_show() allows driver to not implement
pin_config_get() but still get a dump of the pinconf in debugfs by implementing
pin_config_dbg_show().

Finally, not implementing pin_config_get() now results in returning -ENOTSUPP
instead of -EINVAL. While this doesn't have any real impact for now, this feels
more right.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 1292e693

drivers/pinctrl/pinconf.c

+4 −16
Original line number Diff line number Diff line
@@ -28,12 +28,6 @@ int pinconf_check_ops(struct pinctrl_dev *pctldev) 
{

	const struct pinconf_ops *ops = pctldev->desc->confops;



	/* We must be able to read out pin status */

	if (!ops->pin_config_get && !ops->pin_config_group_get) {

		dev_err(pctldev->dev,

			"pinconf must be able to read out pin status\n");

		return -EINVAL;

	}

	/* We have to be able to config the pins in SOME way */

	if (!ops->pin_config_set && !ops->pin_config_group_set) {

		dev_err(pctldev->dev,
@@ -67,9 +61,9 @@ int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin, 
	const struct pinconf_ops *ops = pctldev->desc->confops;



	if (!ops || !ops->pin_config_get) {

		dev_err(pctldev->dev, "cannot get pin configuration, missing "

		dev_dbg(pctldev->dev, "cannot get pin configuration, missing "

			"pin_config_get() function in driver\n");

		return -EINVAL;

		return -ENOTSUPP;

	}



	return ops->pin_config_get(pctldev, pin, config);
@@ -93,10 +87,10 @@ int pin_config_group_get(const char *dev_name, const char *pin_group, 
	ops = pctldev->desc->confops;



	if (!ops || !ops->pin_config_group_get) {

		dev_err(pctldev->dev, "cannot get configuration for pin "

		dev_dbg(pctldev->dev, "cannot get configuration for pin "

			"group, missing group config get function in "

			"driver\n");

		ret = -EINVAL;

		ret = -ENOTSUPP;

		goto unlock;

	}
@@ -305,9 +299,6 @@ static int pinconf_pins_show(struct seq_file *s, void *what) 
	const struct pinconf_ops *ops = pctldev->desc->confops;

	unsigned i, pin;



	if (!ops || !ops->pin_config_get)

		return 0;



	seq_puts(s, "Pin config settings per pin\n");

	seq_puts(s, "Format: pin (name): configs\n");
@@ -356,9 +347,6 @@ static int pinconf_groups_show(struct seq_file *s, void *what) 
	unsigned ngroups = pctlops->get_groups_count(pctldev);

	unsigned selector = 0;



	if (!ops || !ops->pin_config_group_get)

		return 0;



	seq_puts(s, "Pin config settings per pin group\n");

	seq_puts(s, "Format: group (name): configs\n");

CRA Git | Maintained and supported by SUSTech CRA and CCSE