ARM: nxp-imx8mq-evk: Update comments

The comments mention contents of register r0, this is outdated. We
base our decisions on the current EL. Update the comments.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>

1 files changed, 4 insertions, 5 deletions

diff --git a/arch/arm/boards/nxp-imx8mq-evk/lowlevel.c b/arch/arm/boards/nxp-imx8mq-evk/lowlevel.c
index 46dba16ec3..9d060fb589 100644
--- a/arch/arm/boards/nxp-imx8mq-evk/lowlevel.c
+++ b/arch/arm/boards/nxp-imx8mq-evk/lowlevel.c
@@ -88,11 +88,9 @@ static __noreturn noinline void nxp_imx8mq_evk_start(void)
 		setup_uart();
 
 	/*
-	 * if register r0 does not contain 1, we are running for the first time
-	 * and need to initialize the DRAM, install the trampoline and run TF-A
-	 * (BL31).
-	 * Otherwise the 1 indicates that the DRAM setup and trampoline are
-	 * already installed and TF-A has been run. In this case we can skip
+	 * If we are in EL3 we are running for the first time and need to
+	 * initialize the DRAM and run TF-A (BL31). The TF-A will then jump
+	 * to DRAM in EL2.
 	 */
 	if (current_el() == 3) {
 		nxp_imx8mq_evk_sram_setup();
@@ -103,6 +101,7 @@ static __noreturn noinline void nxp_imx8mq_evk_start(void)
 		 */
 		memcpy((void *)MX8MQ_ATF_BL33_BASE_ADDR, _text, __bss_start - _text);
 		imx8mq_atf_load_bl31(bl31, bl31_size);
+		/* not reached */
 	}
 
 	imx8_get_boot_source(&src, &instance);