-----Original Message----- From: Bryan O'Donoghue [mailto:bryan.odonoghue@linaro.org] Sent: 2018年9月5日 18:56 To: u-boot@lists.denx.de; Fabio Estevam fabio.estevam@nxp.com Cc: ryan.harkin@linaro.org; Rui Miguel Silva rui.silva@linaro.org; Bryan O'Donoghue bryan.odonoghue@linaro.org; Stefano Babic sbabic@denx.de; Albert Aribaud albert.u.boot@aribaud.net; Peng Fan peng.fan@nxp.com Subject: [PATCH 1/4] imx: mx7: avoid some initialization if low level is skipped
From: Rui Miguel Silva rui.silva@linaro.org
We can have the case where u-boot is launched after some other low level enabler, like for example when u-boot runs after arm-trusted-firmware and/or optee. So, because of that we may need to jump the initialization of some IP blocks even because we may no longer have the permission for that.
So, if the config option to skip low level init is set disable also timer, board and csu initialization.
Signed-off-by: Rui Miguel Silva rui.silva@linaro.org Signed-off-by: Bryan O'Donoghue bryan.odonoghue@linaro.org Cc: Stefano Babic sbabic@denx.de Cc: Fabio Estevam fabio.estevam@nxp.com Cc: Albert Aribaud albert.u.boot@aribaud.net Cc: Peng Fan peng.fan@nxp.com Cc: u-boot@lists.denx.de
arch/arm/mach-imx/mx7/soc.c | 2 ++ arch/arm/mach-imx/syscounter.c | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/arch/arm/mach-imx/mx7/soc.c b/arch/arm/mach-imx/mx7/soc.c index 7334ca9eb8..c38bd1ce46 100644 --- a/arch/arm/mach-imx/mx7/soc.c +++ b/arch/arm/mach-imx/mx7/soc.c @@ -133,6 +133,7 @@ u32 __weak get_board_rev(void) } #endif
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT /* enable all periherial can be accessed in nosec mode */ static void init_csu(void) { @@ -182,6 +183,7 @@ int arch_cpu_init(void)
return 0; } +#endif
#ifdef CONFIG_ARCH_MISC_INIT int arch_misc_init(void) diff --git a/arch/arm/mach-imx/syscounter.c b/arch/arm/mach-imx/syscounter.c index 676bb3caa9..2c319681fc 100644 --- a/arch/arm/mach-imx/syscounter.c +++ b/arch/arm/mach-imx/syscounter.c @@ -55,6 +55,7 @@ static inline unsigned long long us_to_tick(unsigned long long usec) return usec; }
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT int timer_init(void) { struct sctr_regs *sctr = (struct sctr_regs *)SCTR_BASE_ADDR; @@ -76,6 +77,7 @@ int timer_init(void)
return 0; } +#endif
unsigned long long get_ticks(void) {
Reviewed-by: Peng Fan peng.fan@nxp.com
-- 2.18.0