ChromeOS: Promote variant_cros_gpio()

The only purpose of mainboard_chromeos_acpi_generate()
was to pass cros_gpio array for ACPI \\OIPG package
generation.

Promote variant_cros_gpio() from baseboards to ChromeOS
declaration.

Change-Id: I5c2ac1dcea35f1f00dea401528404bc6ca0ab53c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58897
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/vendorcode/google/chromeos/acpi.c

@@ -6,11 +6,16 @@
 #endif
 #include "chromeos.h"
 
-void chromeos_acpi_gpio_generate(const struct cros_gpio *gpios, size_t num)
+void chromeos_acpi_gpio_generate(void)
 {
-	size_t i;
+	const struct cros_gpio *gpios;
+	size_t i, num;
 	int gpio_num;
 
+	gpios = variant_cros_gpios(&num);
+	if (!gpios)
+		return;
+
 	acpigen_write_scope("\\");
 	acpigen_write_name("OIPG");
 

src/vendorcode/google/chromeos/chromeos.h

@@ -37,17 +37,10 @@ void chromeos_init_chromeos_acpi(void);
  */
 enum cb_err get_dsm_calibration_from_key(const char *key, uint64_t *value);
 
-/*
- * Create the OIPG package containing the Chrome OS gpios described by
- * the chromeos_gpio array.
- */
-struct cros_gpio;
-void chromeos_acpi_gpio_generate(const struct cros_gpio *gpios, size_t num);
-
 /*
  * Declaration for mainboards to use to generate ACPI-specific Chrome OS needs.
  */
-void mainboard_chromeos_acpi_generate(void);
+void chromeos_acpi_gpio_generate(void);
 
 enum {
 	CROS_GPIO_REC = 1, /* Recovery */
@@ -104,4 +97,6 @@ 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);
+
 #endif /* __CHROMEOS_H__ */

src/vendorcode/google/chromeos/gnvs.c

@@ -98,6 +98,5 @@ void acpi_fill_cnvs(void)
 	acpigen_write_opregion(&cnvs_op);
 	acpigen_pop_len();
 
-	/* Usually this creates OIPG package for GPIOs. */
-	mainboard_chromeos_acpi_generate();
+	chromeos_acpi_gpio_generate();
 }