regulator (max5970): Fix IRQ handler

[ 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>

diff --git a/drivers/regulator/max5970-regulator.c b/drivers/regulator/max5970-regulator.c
index b56a174cde3df140a041507786a94b8266d4a184..5c2d49ae332fb84cf8072b80355c05f3d68663b5 100644 (file)
--- 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;
 }