Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-19 02:54:24 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

plat/stm32mp1: fdt helpers for secure aware gpio bank

Browse source 
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>
This commit is contained in:
Etienne Carriere 2020-04-25 11:14:45 +02:00
parent c0ea3b1b79
commit ccc199edda
4 changed files with 75 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
plat/st/common/include/stm32mp_common.h
View file

@ -61,6 +61,9 @@ uintptr_t stm32_get_gpio_bank_base(unsigned int bank);
unsigned long stm32_get_gpio_bank_clock(unsigned int bank);
uint32_t stm32_get_gpio_bank_offset(unsigned int bank);
/* Return node offset for target GPIO bank ID @bank or a FDT error code */
int stm32_get_gpio_bank_pinctrl_node(void *fdt, unsigned int bank);
/* Print CPU information */
void stm32mp_print_cpuinfo(void);

2
plat/st/common/include/stm32mp_dt.h
View file

@ -1,4 +1,5 @@
/*
* Copyright (c) 2020, STMicroelectronics - All Rights Reserved
* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
@ -39,5 +40,6 @@ uintptr_t dt_get_pwr_base(void);
uint32_t dt_get_pwr_vdd_voltage(void);
uintptr_t dt_get_syscfg_base(void);
const char *dt_get_board_model(void);
int fdt_get_gpio_bank_pin_count(unsigned int bank);
#endif /* STM32MP_DT_H */

48
plat/st/common/stm32mp_dt.c
View file

@ -393,3 +393,51 @@ const char *dt_get_board_model(void)
return (const char *)fdt_getprop(fdt, node, "model", NULL);
}
/*******************************************************************************
* This function gets the pin count for a GPIO bank based from the FDT.
* It also checks node consistency.
******************************************************************************/
int fdt_get_gpio_bank_pin_count(unsigned int bank)
{
int pinctrl_node;
int node;
uint32_t bank_offset;
pinctrl_node = stm32_get_gpio_bank_pinctrl_node(fdt, bank);
if (pinctrl_node < 0) {
return -FDT_ERR_NOTFOUND;
}
bank_offset = stm32_get_gpio_bank_offset(bank);
fdt_for_each_subnode(node, fdt, pinctrl_node) {
const fdt32_t *cuint;
if (fdt_getprop(fdt, node, "gpio-controller", NULL) == NULL) {
continue;
}
cuint = fdt_getprop(fdt, node, "reg", NULL);
if (cuint == NULL) {
continue;
}
if (fdt32_to_cpu(*cuint) != bank_offset) {
continue;
}
if (fdt_get_status(node) == DT_DISABLED) {
return 0;
}
cuint = fdt_getprop(fdt, node, "ngpios", NULL);
if (cuint == NULL) {
return -FDT_ERR_NOTFOUND;
}
return (int)fdt32_to_cpu(*cuint);
}
return 0;
}

22
plat/st/stm32mp1/stm32mp1_private.c
View file

@ -109,6 +109,28 @@ unsigned long stm32_get_gpio_bank_clock(unsigned int bank)
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;