rockchip: support rk3399 gpio driver
There are 5 groups of GPIO (GPIO0~GPIO4), totally have 122 GPIOs
on rk3399 platform.
The pull direction(pullup or pulldown) for all of GPIOs are
software-programmable.
At the moment, we add the gpio basic driver since reset or power off
the devices from gpio configuration for BL31.
diff --git a/plat/rockchip/common/include/plat_private.h b/plat/rockchip/common/include/plat_private.h
index e05bda4..8cd762d 100644
--- a/plat/rockchip/common/include/plat_private.h
+++ b/plat/rockchip/common/include/plat_private.h
@@ -110,6 +110,8 @@
void platform_cpu_warmboot(void);
+void plat_rockchip_gpio_init(void);
+
extern const unsigned char rockchip_power_domain_tree_desc[];
extern void *pmu_cpuson_entrypoint_start;