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rpi3: Enable GPIO in BL2 

This patch inits the GPIO in BL2 earlysetup. So BL2 can start operating
GPIO pins.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
This commit is contained in:
Ying-Chun Liu (PaulLiu) 2019-01-22 03:27:55 +08:00
parent d604ac4831
commit 2be86dd395
3 changed files with 29 additions and 0 deletions
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4
plat/rpi3/platform.mk
View File

@ -27,6 +27,10 @@ BL2_SOURCES += common/desc_image_load.c \
drivers/io/io_fip.c \
drivers/io/io_memmap.c \
drivers/io/io_storage.c \
drivers/gpio/gpio.c \
drivers/delay_timer/delay_timer.c \
drivers/delay_timer/generic_delay_timer.c \
drivers/rpi3/gpio/rpi3_gpio.c \
plat/common/aarch64/platform_mp_stack.S \
plat/rpi3/aarch64/plat_helpers.S \
plat/rpi3/aarch64/rpi3_bl2_mem_params_desc.c \

19
plat/rpi3/rpi3_bl2_setup.c
View File

@ -15,12 +15,25 @@
#include <lib/optee_utils.h>
#include <lib/xlat_tables/xlat_mmu_helpers.h>
#include <lib/xlat_tables/xlat_tables_defs.h>
#include <drivers/generic_delay_timer.h>
#include <drivers/rpi3/gpio/rpi3_gpio.h>
#include "rpi3_private.h"
/* Data structure which holds the extents of the trusted SRAM for BL2 */
static meminfo_t bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE);
/* rpi3 GPIO setup function. */
static void rpi3_gpio_setup(void)
{
struct rpi3_gpio_params params;
memset(&params, 0, sizeof(struct rpi3_gpio_params));
params.reg_base = RPI3_GPIO_BASE;
rpi3_gpio_init(&params);
}
/*******************************************************************************
* BL1 has passed the extents of the trusted SRAM that should be visible to BL2
* in x0. This memory layout is sitting at the base of the free trusted SRAM.
@ -35,6 +48,12 @@ void bl2_early_platform_setup2(u_register_t arg0, u_register_t arg1,
/* Initialize the console to provide early debug support */
rpi3_console_init();
/* Enable arch timer */
generic_delay_timer_init();
/* Setup GPIO driver */
rpi3_gpio_setup();
/* Setup the BL2 memory layout */
bl2_tzram_layout = *mem_layout;

6
plat/rpi3/rpi3_hw.h
View File

@ -83,6 +83,12 @@
#define RPI3_MINI_UART_BASE (RPI3_IO_BASE + RPI3_IO_MINI_UART_OFFSET)
#define RPI3_MINI_UART_CLK_IN_HZ ULL(500000000)
/*
* GPIO controller
*/
#define RPI3_IO_GPIO_OFFSET ULL(0x00200000)
#define RPI3_GPIO_BASE (RPI3_IO_BASE + RPI3_IO_GPIO_OFFSET)
/*
* Local interrupt controller
*/