From: Thomas Preston thomas.preston@codethink.co.uk
[ 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@codethink.co.uk Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com Link: https://lore.kernel.org/r/20200828213226.1734264-3-thomas.preston@codethink.... Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 676ff9a4459e3..d8bcbefcba890 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08.c +++ b/drivers/pinctrl/pinctrl-mcp23s08.c @@ -144,7 +144,7 @@ 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, };