stoneyridge GPIO: Create and use PAD_INT for interrupt pins

The default interrupt control for GPIO pins within stoneyridge is for
edge triggered, high. However, sometimes these need to change, or maybe
the interrupt needs to be reported or delivered. This was the case of
platform grunt, where the interrupt related bits were being changed
afterwards. Ideally all the bits should be programmed through the same
procedure. Create several PAD_INT definitions (for general configuration,
for trigger configuration and for interrupt type configuration) and change
function sb_program_gpios() to accept the output from PAD_INT_XX and
program all the necessary bits while keeping compatibility with other
PAD_XX definitions.

BUG=b:72875858
TEST=Add code to report GPIO and interrupt configuration, build grunt and
record a baseline. Add new code, rebuild grunt and record a test output.
Compare baseline against test, there should be no change in GPIO or
interrupt programming.
Remove code that reports GPIO/interrupt configuration.

Change-Id: I3457543bdf64ec757fd82df53c83fdc1d03c1f22
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/25758
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/src/mainboard/google/kahlee/mainboard.c b/src/mainboard/google/kahlee/mainboard.c
index a01ae0acf5..e090401ddf 100644
--- a/src/mainboard/google/kahlee/mainboard.c
+++ b/src/mainboard/google/kahlee/mainboard.c
@@ -169,8 +169,16 @@ static void mainboard_init(void *chip_info)
 	gpios = variant_gpio_table(&num_gpios);
 	sb_program_gpios(gpios, num_gpios);
 
+	/*
+	 * Some platforms use SCI not generated by a GPIO pin (event above 23).
+	 * For these boards, gpe_configure_sci() is still needed, but all GPIO
+	 * generated events (23-0) must be removed from gpe_table[].
+	 * For boards that only have GPIO generated events, table gpe_table[]
+	 * must be removed, and get_gpe_table() should return NULL.
+	 */
 	gpes = get_gpe_table(&num);
-	gpe_configure_sci(gpes, num);
+	if (gpes != NULL)
+		gpe_configure_sci(gpes, num);
 
 	/* Initialize i2c busses that were not initialized in bootblock */
 	i2c_soc_init();