From: Thomas Preston <thomas.preston@xxxxxxxxxxxxxxx> [ Upstream commit b9b7fb29433b906635231d0a111224efa009198c ] On page 23 of the datasheet [0] it says "The register remains unchanged until the interrupt is cleared via a read of INTCAP or GPIO." Include INTCAPA and INTCAPB registers in precious range, so that they aren't accidentally cleared when we read via debugfs. [0] https://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf Fixes: 8f38910ba4f6 ("pinctrl: mcp23s08: switch to regmap caching") Signed-off-by: Thomas Preston <thomas.preston@xxxxxxxxxxxxxxx> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Link: https://lore.kernel.org/r/20200828213226.1734264-3-thomas.preston@xxxxxxxxxxxxxxx Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/pinctrl/pinctrl-mcp23s08.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c index 12e7f7c54ffaa..5971338c87572 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08.c +++ b/drivers/pinctrl/pinctrl-mcp23s08.c @@ -141,7 +141,7 @@ static const struct regmap_access_table mcp23x17_volatile_table = { }; static const struct regmap_range mcp23x17_precious_range = { - .range_min = MCP_GPIO << 1, + .range_min = MCP_INTCAP << 1, .range_max = MCP_GPIO << 1, }; -- 2.25.1
