stm32mp1: register shared resource per GPIO bank/pin
Introduce helper functions stm32mp_register_secure_gpio() and
stm32mp_register_non_secure_gpio() for drivers to register a
GPIO pin as secure or non-secure.
These functions are stubbed when shared resource driver is not
embedded in the BL image so that drivers do not bother whether they
shall register or not their resources.
Change-Id: I1fe98576c072ae31f75427c9ac5c9f6c4f1b6ed1
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/plat/st/common/include/stm32mp_shared_resources.h b/plat/st/common/include/stm32mp_shared_resources.h
index 3160db0..13f4b13 100644
--- a/plat/st/common/include/stm32mp_shared_resources.h
+++ b/plat/st/common/include/stm32mp_shared_resources.h
@@ -29,6 +29,10 @@
void stm32mp_register_secure_periph_iomem(uintptr_t base);
void stm32mp_register_non_secure_periph_iomem(uintptr_t base);
+/* Register a GPIO as secure or non-secure based on its bank and pin numbers */
+void stm32mp_register_secure_gpio(unsigned int bank, unsigned int pin);
+void stm32mp_register_non_secure_gpio(unsigned int bank, unsigned int pin);
+
/* Consolidate peripheral states and lock against new peripheral registering */
void stm32mp_lock_periph_registering(void);
#else
@@ -40,5 +44,15 @@
void stm32mp_register_non_secure_periph_iomem(uintptr_t base __unused)
{
}
+
+static inline void stm32mp_register_secure_gpio(unsigned int bank __unused,
+ unsigned int pin __unused)
+{
+}
+
+static inline void stm32mp_register_non_secure_gpio(unsigned int bank __unused,
+ unsigned int pin __unused)
+{
+}
#endif /* STM32MP_SHARED_RESOURCES */
#endif /* STM32MP_SHARED_RESOURCES_H */
diff --git a/plat/st/stm32mp1/stm32mp1_shared_resources.c b/plat/st/stm32mp1/stm32mp1_shared_resources.c
index 32e61d9..208e34a 100644
--- a/plat/st/stm32mp1/stm32mp1_shared_resources.c
+++ b/plat/st/stm32mp1/stm32mp1_shared_resources.c
@@ -311,6 +311,29 @@
register_periph_iomem(base, SHRES_NON_SECURE);
}
+void stm32mp_register_secure_gpio(unsigned int bank, unsigned int pin)
+{
+ switch (bank) {
+ case GPIO_BANK_Z:
+ register_periph(STM32MP1_SHRES_GPIOZ(pin), SHRES_SECURE);
+ break;
+ default:
+ ERROR("GPIO bank %u cannot be secured\n", bank);
+ panic();
+ }
+}
+
+void stm32mp_register_non_secure_gpio(unsigned int bank, unsigned int pin)
+{
+ switch (bank) {
+ case GPIO_BANK_Z:
+ register_periph(STM32MP1_SHRES_GPIOZ(pin), SHRES_NON_SECURE);
+ break;
+ default:
+ break;
+ }
+}
+
static bool stm32mp_gpio_bank_is_non_secure(unsigned int bank)
{
unsigned int non_secure = 0U;