[PATCH] regmap: irq: Make IRQ type support optional

[Charles Keepax <ckeepax@opensource.cirrus.com>]

Currently only gpio-max77620 is using the type support in regmap IRQ,
but the implementation causes the irq_set_type operation to fail on all
other regmap IRQ chips. Avoid these regressions by skipping the type
handling on any chips that don't define a set of supported types.

Fixes: 1c2928e3e321 ("regmap: regmap-irq/gpio-max77620: add level-irq support")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 drivers/base/regmap/regmap-irq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 1bd1145ad8b5e..8c674f1ad0fc8 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -257,6 +257,9 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
 	int reg;
 	const struct regmap_irq_type *t = &irq_data->type;
 
+	if (!t->types_supported)
+		return 0;
+
 	if ((t->types_supported & type) != type)
 		return -ENOTSUPP;
 
-- 
2.11.0