mb/google/octopus: Disable BT before S5 entry

The CNVi wifi/bt module prevents entry into S5 by keeping internal
SoC clocks running. Therefore it's necessary to disable BT prior to
S5 entry.

BUG=b:79606769
TEST= Test if BT device works under following cases:
1. Power-on
2. Press powerbtn before OS entry
3. Power-on from S5 again

Change-Id: Ibc14b4080a27de48d197e16d0eed162603482de2
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Reviewed-on: https://review.coreboot.org/26238
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/octopus/smihandler.c

@@ -34,7 +34,7 @@ void mainboard_smi_sleep(u8 slp_typ)
 	const struct pad_config *pads;
 	size_t num;
 
-	pads = variant_sleep_gpio_table(&num);
+	pads = variant_sleep_gpio_table(&num, slp_typ);
 	gpio_configure_pads(pads, num);
 
 	chromeec_smi_sleep(slp_typ, MAINBOARD_EC_S3_WAKE_EVENTS,

src/mainboard/google/octopus/variants/baseboard/gpio.c

@@ -13,6 +13,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/acpi.h>
 #include <baseboard/gpio.h>
 #include <baseboard/variants.h>
 #include <commonlib/helpers.h>
@@ -300,9 +301,20 @@ variant_early_gpio_table(size_t *num)
 static const struct pad_config sleep_gpio_table[] = {
 };
 
+/* GPIO settings before entering slp_s5. */
+static const struct pad_config sleep_s5_gpio_table[] = {
+	/* BT_DISABLE_L */
+	PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_109, 0, DEEP, NONE, Tx0RXDCRx1, SAME),
+};
+
 const struct pad_config *__weak
-variant_sleep_gpio_table(size_t *num)
+variant_sleep_gpio_table(size_t *num, int slp_typ)
 {
+	if (slp_typ == ACPI_S5) {
+		*num = ARRAY_SIZE(sleep_s5_gpio_table);
+		return sleep_s5_gpio_table;
+	}
+
 	*num = ARRAY_SIZE(sleep_gpio_table);
 	return sleep_gpio_table;
 }

src/mainboard/google/octopus/variants/baseboard/include/baseboard/variants.h

@@ -28,7 +28,7 @@ uint8_t variant_board_id(void);
  * entries for each table. */
 const struct pad_config *variant_gpio_table(size_t *num);
 const struct pad_config *variant_early_gpio_table(size_t *num);
-const struct pad_config *variant_sleep_gpio_table(size_t *num);
+const struct pad_config *variant_sleep_gpio_table(size_t *num, int slp_typ);
 
 /* Baseboard default swizzle. Can be reused if swizzle is same. */
 extern const struct lpddr4_swizzle_cfg baseboard_lpddr4_swizzle;