feat(imx8m): detect console base address during runtime
Provide a helper to detect the enabled UART device during runtime. This
lower the integration effort and make it more straight forward for
'simple' use-cases with a single UART enabled. If multiple UARTs are
enabled the first enabled is returned.
The auto-detection is enabled by setting IMX_BOOT_UART_BASE=0 to keep
the backward compatibility. For more advanced use-cases (multiple UARTs
are enabled) the user still has to provide the correct base address.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Change-Id: I300a167e1a10f9aa991c8d1c3efe2c6b23f56c47
diff --git a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
index 67bfd36..8e66361 100644
--- a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
+++ b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
@@ -27,6 +27,7 @@
#include <imx_uart.h>
#include <imx_rdc.h>
#include <imx8m_caam.h>
+#include <imx8m_ccm.h>
#include <imx8m_csu.h>
#include <plat_imx8.h>
@@ -130,6 +131,7 @@
void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
u_register_t arg2, u_register_t arg3)
{
+ unsigned int console_base = 0U;
static console_t console;
int i;
@@ -144,7 +146,14 @@
imx_csu_init(csu_cfg);
- console_imx_uart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
+#if IMX_BOOT_UART_BASE
+ console_base = IMX_BOOT_UART_BASE;
+#endif
+ if (console_base == 0U) {
+ console_base = imx8m_uart_get_base();
+ }
+
+ console_imx_uart_register(console_base, IMX_BOOT_UART_CLK_IN_HZ,
IMX_CONSOLE_BAUDRATE, &console);
/* This console is only used for boot stage */
console_set_scope(&console, CONSOLE_FLAG_BOOT);