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pinctrl: implement pinctrl_check_ops 

Most code assumes that the pinctrl ops are present. Validate this when
registering a pinctrl driver. Remove the one place in the code that
was checking whether one of these non-optional ops was present.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stephen Warren 2012-03-16 14:54:25 -06:00 committed by Linus Walleij
parent 6f11f6f1a0
commit f84cc342b1
1 changed files with 21 additions and 4 deletions
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25
drivers/pinctrl/core.c
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@ -908,10 +908,6 @@ static int pinctrl_groups_show(struct seq_file *s, void *what)
const struct pinctrl_ops *ops = pctldev->desc->pctlops;
unsigned selector = 0;
/* No grouping */
if (!ops)
return 0;
mutex_lock(&pinctrl_mutex);
seq_puts(s, "registered pin groups:\n");
@ -1225,6 +1221,19 @@ static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
#endif
static int pinctrl_check_ops(struct pinctrl_dev *pctldev)
{
const struct pinctrl_ops *ops = pctldev->desc->pctlops;
if (!ops ||
!ops->list_groups ||
!ops->get_group_name ||
!ops->get_group_pins)
return -EINVAL;
return 0;
}
/**
* pinctrl_register() - register a pin controller device
* @pctldesc: descriptor for this pin controller
@ -1256,6 +1265,14 @@ struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
INIT_LIST_HEAD(&pctldev->gpio_ranges);
pctldev->dev = dev;
/* check core ops for sanity */
ret = pinctrl_check_ops(pctldev);
if (ret) {
pr_err("%s pinctrl ops lacks necessary functions\n",
pctldesc->name);
goto out_err;
}
/* If we're implementing pinmuxing, check the ops for sanity */
if (pctldesc->pmxops) {
ret = pinmux_check_ops(pctldev);