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authorMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>2021-06-03 08:41:55 +0300
committerMark Brown <broonie@kernel.org>2021-06-21 13:08:40 +0100
commit7111c6d1b31b42c8c758f6681e895a5116e3bad6 (patch)
tree8335c7f51220aaec7686dacb67c9be8831bad121 /drivers/regulator/devres.c
parent157d2230193ae683fcffcc1cd0a2c3aa4479955f (diff)
regulator: IRQ based event/error notification helpers
Provide helper function for IC's implementing regulator notifications when an IRQ fires. The helper also works for IRQs which can not be acked. Helper can be set to disable the IRQ at handler and then re-enabling it on delayed work later. The helper also adds regulator_get_error_flags() errors in cache for the duration of IRQ disabling. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/ebdf86d8c22b924667ec2385330e30fcbfac0119.1622628334.git.matti.vaittinen@fi.rohmeurope.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/devres.c')
-rw-r--r--drivers/regulator/devres.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/regulator/devres.c b/drivers/regulator/devres.c
index 3091210889e3..a8de0aa88bad 100644
--- a/drivers/regulator/devres.c
+++ b/drivers/regulator/devres.c
@@ -481,3 +481,55 @@ void devm_regulator_unregister_notifier(struct regulator *regulator,
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_regulator_unregister_notifier);
+
+static void regulator_irq_helper_drop(void *res)
+{
+ regulator_irq_helper_cancel(&res);
+}
+
+/**
+ * devm_regulator_irq_helper - resource managed registration of IRQ based
+ * regulator event/error notifier
+ *
+ * @dev: device to which lifetime the helper's lifetime is
+ * bound.
+ * @d: IRQ helper descriptor.
+ * @irq: IRQ used to inform events/errors to be notified.
+ * @irq_flags: Extra IRQ flags to be OR'ed with the default
+ * IRQF_ONESHOT when requesting the (threaded) irq.
+ * @common_errs: Errors which can be flagged by this IRQ for all rdevs.
+ * When IRQ is re-enabled these errors will be cleared
+ * from all associated regulators
+ * @per_rdev_errs: Optional error flag array describing errors specific
+ * for only some of the regulators. These errors will be
+ * or'ed with common errors. If this is given the array
+ * should contain rdev_amount flags. Can be set to NULL
+ * if there is no regulator specific error flags for this
+ * IRQ.
+ * @rdev: Array of pointers to regulators associated with this
+ * IRQ.
+ * @rdev_amount: Amount of regulators associated with this IRQ.
+ *
+ * Return: handle to irq_helper or an ERR_PTR() encoded error code.
+ */
+void *devm_regulator_irq_helper(struct device *dev,
+ const struct regulator_irq_desc *d, int irq,
+ int irq_flags, int common_errs,
+ int *per_rdev_errs,
+ struct regulator_dev **rdev, int rdev_amount)
+{
+ void *ptr;
+ int ret;
+
+ ptr = regulator_irq_helper(dev, d, irq, irq_flags, common_errs,
+ per_rdev_errs, rdev, rdev_amount);
+ if (IS_ERR(ptr))
+ return ptr;
+
+ ret = devm_add_action_or_reset(dev, regulator_irq_helper_drop, ptr);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return ptr;
+}
+EXPORT_SYMBOL_GPL(devm_regulator_irq_helper);