[PATCH 6.6 048/299] regulator (max5970): Fix IRQ handler

Greg Kroah-Hartman
2024-02-27T13:48:42Z

From: Patrick Rudolph <patrick.rudolph@9elements.com>

[ Upstream commit a3fa9838e8140584a6f338e8516f2b05d3bea812 ]

The max5970 datasheet gives the impression that IRQ status bits must
be cleared by writing a one to set bits, as those are marked with 'R/C',
however tests showed that a zero must be written.

Fixes an IRQ storm as the interrupt handler actually clears the IRQ
status bits.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com>
Link: https://msgid.link/r/20240130150257.3643657-1-naresh.solanki@9elements.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/regulator/max5970-regulator.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/max5970-regulator.c b/drivers/regulator/max5970-regulator.c
index b56a174cde3df..5c2d49ae332fb 100644
--- a/drivers/regulator/max5970-regulator.c
+++ b/drivers/regulator/max5970-regulator.c
@@ -265,7 +265,7 @@ static int max597x_regmap_read_clear(struct regmap *map, unsigned int reg,
return ret;

if (*val)
- return regmap_write(map, reg, *val);
+ return regmap_write(map, reg, 0);

return 0;
}
--
2.43.0