plat/stm32mp1: fdt helpers for secure aware gpio bank
New helper functions to get GPIO banks configuration from the FDT.
stm32_get_gpio_bank_pinctrl_node() allows stm32mp platforms to
differentiate specific GPIO banks when these are defined with a specific
path in the FDT.
fdt_get_gpio_bank_pin_count() returns the number of pins in a GPIO bank
as it depends on the SoC variant.
Change-Id: I4481774152b3c6bf35bf986f58e357c2f9c19176
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/plat/st/stm32mp1/stm32mp1_private.c b/plat/st/stm32mp1/stm32mp1_private.c
index 284ec9f..779228d 100644
--- a/plat/st/stm32mp1/stm32mp1_private.c
+++ b/plat/st/stm32mp1/stm32mp1_private.c
@@ -109,6 +109,28 @@
return GPIOA + (bank - GPIO_BANK_A);
}
+int stm32_get_gpio_bank_pinctrl_node(void *fdt, unsigned int bank)
+{
+ switch (bank) {
+ case GPIO_BANK_A:
+ case GPIO_BANK_B:
+ case GPIO_BANK_C:
+ case GPIO_BANK_D:
+ case GPIO_BANK_E:
+ case GPIO_BANK_F:
+ case GPIO_BANK_G:
+ case GPIO_BANK_H:
+ case GPIO_BANK_I:
+ case GPIO_BANK_J:
+ case GPIO_BANK_K:
+ return fdt_path_offset(fdt, "/soc/pin-controller");
+ case GPIO_BANK_Z:
+ return fdt_path_offset(fdt, "/soc/pin-controller-z");
+ default:
+ panic();
+ }
+}
+
static int get_part_number(uint32_t *part_nb)
{
uint32_t part_number;