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| author | Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> | 2021-11-24 10:17:13 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-11-24 15:57:30 +0300 |
| commit | a764ff77d697a4a13e69b3379cc613f7409c6b9a (patch) | |
| tree | 85c15bedf4737a4b60e18a9d86438d5f2f999c4a /drivers/regulator | |
| parent | 6fadec4c5561e2fbe1dfa8a7da9bc58d094a8f04 (diff) | |
| download | linux-a764ff77d697a4a13e69b3379cc613f7409c6b9a.tar.xz | |
regulator: irq_helper: Provide helper for trivial IRQ notifications
Provide a generic map_event helper for regulators which have a notification
IRQ with single, well defined purpose. Eg, IRQ always indicates exactly one
event for exactly one regulator device. For such IRQs the mapping is
trivial.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/603b7ed1938013a00371c1e7ccc63dfb16982b87.1637736436.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/irq_helpers.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/regulator/irq_helpers.c b/drivers/regulator/irq_helpers.c index 522764435575..fe7ae0f3f46a 100644 --- a/drivers/regulator/irq_helpers.c +++ b/drivers/regulator/irq_helpers.c @@ -320,7 +320,9 @@ static void init_rdev_errors(struct regulator_irq *h) * 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 + * from all associated regulators. Use this instead of the + * per_rdev_errs if you use + * regulator_irq_map_event_simple() for event mapping. * @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 @@ -395,3 +397,40 @@ void regulator_irq_helper_cancel(void **handle) } } EXPORT_SYMBOL_GPL(regulator_irq_helper_cancel); + +/** + * regulator_irq_map_event_simple - regulator IRQ notification for trivial IRQs + * + * @irq: Number of IRQ that occurred + * @rid: Information about the event IRQ indicates + * @dev_mask: mask indicating the regulator originating the IRQ + * + * Regulators whose IRQ has single, well defined purpose (always indicate + * exactly one event, and are relevant to exactly one regulator device) can + * use this function as their map_event callbac for their regulator IRQ + * notification helperk. Exactly one rdev and exactly one error (in + * "common_errs"-field) can be given at IRQ helper registration for + * regulator_irq_map_event_simple() to be viable. + */ +int regulator_irq_map_event_simple(int irq, struct regulator_irq_data *rid, + unsigned long *dev_mask) +{ + int err = rid->states[0].possible_errs; + + *dev_mask = 1; + /* + * This helper should only be used in a situation where the IRQ + * can indicate only one type of problem for one specific rdev. + * Something fishy is going on if we are having multiple rdevs or ERROR + * flags here. + */ + if (WARN_ON(rid->num_states != 1 || hweight32(err) != 1)) + return 0; + + rid->states[0].errors = err; + rid->states[0].notifs = regulator_err2notif(err); + + return 0; +} +EXPORT_SYMBOL_GPL(regulator_irq_map_event_simple); + |