gpio: mcp23s08: Fix clearing of interrupt.
The mcp23s18 is configurable on clearing the interrupt on either reading
INTCAP or GPIO. Since driver reads INTCAP in IRQ and not the GPIO reg need
to set control byte for this mode.
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index 9719158..47e4869 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -49,6 +49,7 @@
# define IOCON_HAEN (1 << 3)
# define IOCON_ODR (1 << 2)
# define IOCON_INTPOL (1 << 1)
+# define IOCON_INTCC (1)
#define MCP_GPPU 0x06
#define MCP_INTF 0x07
#define MCP_INTCAP 0x08
@@ -680,6 +681,9 @@
if (mirror)
status |= IOCON_MIRROR | (IOCON_MIRROR << 8);
+ if (type == MCP_TYPE_S18)
+ status |= IOCON_INTCC | (IOCON_INTCC << 8);
+
status = mcp->ops->write(mcp, MCP_IOCON, status);
if (status < 0)
goto fail;