From ba89878d702954d5f438df29ff1b0e0e90519db9 Mon Sep 17 00:00:00 2001 From: Mario Kicherer <dev@kicherer.org> Date: Wed, 1 Feb 2023 14:16:22 +0800 Subject: [PATCH] armv7: ls102xa: make QSPI clock selection optional during SoC init To improve startup times when booting from QSPI flash, the QSPI frequency can be configured very early in the boot process [1] to reduce loading times of U-Boot itself. This patch adds an option to disable setting the frequency to a default value during SoC initialization. [1] https://www.nxp.com/docs/en/application-note/AN12279.pdf Signed-off-by: Mario Kicherer <dev@kicherer.org> Signed-off-by: Peng Fan <peng.fan@nxp.com> --- arch/arm/cpu/armv7/ls102xa/Kconfig | 9 +++++++++ arch/arm/cpu/armv7/ls102xa/soc.c | 2 +- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/arm/cpu/armv7/ls102xa/Kconfig b/arch/arm/cpu/armv7/ls102xa/Kconfig index 0edcf4c5ee..3e292bf70e 100644 --- a/arch/arm/cpu/armv7/ls102xa/Kconfig +++ b/arch/arm/cpu/armv7/ls102xa/Kconfig @@ -96,4 +96,13 @@ config SYS_FSL_HAS_CCI400 config SYS_FSL_ERRATUM_A008407 bool +config SYS_FSL_QSPI_SKIP_CLKSEL + bool "Skip setting QSPI clock during SoC init" + default 0 + help + To improve startup times when booting from QSPI flash, the QSPI + frequency can be set very early in the boot process. If this option + is enabled, the QSPI frequency will not be changed by U-Boot during + SoC initialization. + endmenu diff --git a/arch/arm/cpu/armv7/ls102xa/soc.c b/arch/arm/cpu/armv7/ls102xa/soc.c index 1dafa3c1b4..84d4ea3a8f 100644 --- a/arch/arm/cpu/armv7/ls102xa/soc.c +++ b/arch/arm/cpu/armv7/ls102xa/soc.c @@ -170,7 +170,7 @@ int arch_soc_init(void) enable_layerscape_ns_access(); #endif -#ifdef CONFIG_FSL_QSPI +#if defined(CONFIG_FSL_QSPI) && !defined(CONFIG_SYS_FSL_QSPI_SKIP_CLKSEL) out_be32(&scfg->qspi_cfg, SCFG_QSPI_CLKSEL); #endif -- 2.39.5