From: Thierry Reding <[email protected]> When a GPIO controller registers a pin range with a pin controller, establish a device link between them in order to keep track of the dependency, which will help keep the right suspend/resume ordering.
Signed-off-by: Thierry Reding <[email protected]> --- drivers/pinctrl/core.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index b70df27874d1..5079e8a5de61 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -404,6 +404,17 @@ void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev, mutex_lock(&pctldev->mutex); list_add_tail(&range->node, &pctldev->gpio_ranges); mutex_unlock(&pctldev->mutex); + + if (range->gc) { + struct device_link *link; + + link = device_link_add(range->gc->parent, pctldev->dev, + DL_FLAG_AUTOREMOVE_CONSUMER); + if (!link) + dev_err(pctldev->dev, + "failed to add device link to %s\n", + dev_name(range->gc->parent)); + } } EXPORT_SYMBOL_GPL(pinctrl_add_gpio_range); @@ -2136,8 +2147,12 @@ void pinctrl_unregister(struct pinctrl_dev *pctldev) pinctrl_free_pindescs(pctldev, pctldev->desc->pins, pctldev->desc->npins); /* remove gpio ranges map */ - list_for_each_entry_safe(range, n, &pctldev->gpio_ranges, node) + list_for_each_entry_safe(range, n, &pctldev->gpio_ranges, node) { + if (range->gc) + device_link_remove(range->gc->parent, pctldev->dev); + list_del(&range->node); + } mutex_unlock(&pctldev->mutex); mutex_destroy(&pctldev->mutex); -- 2.21.0
