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

From: Charles Keepax
Date: Fri Dec 28 2018 - 06:24:09 EST

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@xxxxxxxxxxxxxxxxxxxxx>
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;