ChromeOS: Add DECLARE_x_CROS_GPIOS()

Change-Id: I88406fa1b54312616e6717af3d924436dc4ff1a6
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58899
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/vendorcode/google/chromeos/acpi.c

@@ -12,7 +12,8 @@ void chromeos_acpi_gpio_generate(void)
 	size_t i, num;
 	int gpio_num;
 
-	gpios = variant_cros_gpios(&num);
+	num = variant_cros_gpio.count;
+	gpios = variant_cros_gpio.gpios;
 	if (!gpios)
 		return;
 

src/vendorcode/google/chromeos/chromeos.h

@@ -98,6 +98,23 @@ struct cros_gpio {
 #define CROS_GPIO_PE_AH(num, dev) \
 	CROS_GPIO_PE_INITIALIZER(CROS_GPIO_ACTIVE_HIGH, num, dev)
 
-const struct cros_gpio *variant_cros_gpios(size_t *num);
+struct cros_gpio_pack {
+	int count;
+	const struct cros_gpio *gpios;
+};
+
+extern const struct cros_gpio_pack variant_cros_gpio;
+
+#define DECLARE_NO_CROS_GPIOS() \
+	const struct cros_gpio_pack variant_cros_gpio = \
+		{ .count = 0, .gpios = NULL }
+
+#define DECLARE_CROS_GPIOS(x) \
+	const struct cros_gpio_pack variant_cros_gpio = \
+		{ .count = ARRAY_SIZE(x), .gpios = x }
+
+#define DECLARE_WEAK_CROS_GPIOS(x) \
+	const struct cros_gpio_pack __weak variant_cros_gpio = \
+		{ .count = ARRAY_SIZE(x), .gpios = x }
 
 #endif /* __CHROMEOS_H__ */