If CONFIG_MICRO_SUPPORT_CARD is enabled, U-Boot initialize SBC (System Bus Controller), which may not be really necessary.
Check the "socionext,uniphier-system-bus" node in DT run-time. If and only if it is found and its "status" property is okay, initialize the SBC block.
Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com ---
arch/arm/mach-uniphier/Makefile | 3 ++- arch/arm/mach-uniphier/sbc/Makefile | 4 ++++ arch/arm/mach-uniphier/sbc/sbc-ld11.c | 3 +++ arch/arm/mach-uniphier/sbc/sbc-ld4.c | 3 +++ arch/arm/mach-uniphier/sbc/sbc-pxs2.c | 3 +++ arch/arm/mach-uniphier/sbc/sbc-regs.h | 2 ++ arch/arm/mach-uniphier/sbc/sbc.c | 16 ++++++++++++++++ 7 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-uniphier/Makefile b/arch/arm/mach-uniphier/Makefile index d0c39d427379..caa79d1e53e6 100644 --- a/arch/arm/mach-uniphier/Makefile +++ b/arch/arm/mach-uniphier/Makefile @@ -18,13 +18,14 @@ ifndef CONFIG_SYSRESET obj-y += reset.o endif
-obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc/ micro-support-card.o +obj-$(CONFIG_MICRO_SUPPORT_CARD) += micro-support-card.o obj-y += pinctrl-glue.o obj-$(CONFIG_MMC) += mmc-first-dev.o obj-y += fdt-fixup.o
endif
+obj-y += sbc/ obj-y += soc-info.o obj-y += boot-device/ obj-y += clk/ diff --git a/arch/arm/mach-uniphier/sbc/Makefile b/arch/arm/mach-uniphier/sbc/Makefile index 912e05a725d6..4efdd419f046 100644 --- a/arch/arm/mach-uniphier/sbc/Makefile +++ b/arch/arm/mach-uniphier/sbc/Makefile @@ -1,5 +1,8 @@ # SPDX-License-Identifier: GPL-2.0+
+obj- += dummy.o + +ifndef CONFIG_SPL_BUILD obj-y += sbc.o
obj-$(CONFIG_ARCH_UNIPHIER_LD4) += sbc-ld4.o @@ -9,3 +12,4 @@ obj-$(CONFIG_ARCH_UNIPHIER_LD6B) += sbc-pxs2.o obj-$(CONFIG_ARCH_UNIPHIER_LD11) += sbc-ld11.o obj-$(CONFIG_ARCH_UNIPHIER_LD20) += sbc-ld11.o obj-$(CONFIG_ARCH_UNIPHIER_PXS3) += sbc-pxs2.o +endif diff --git a/arch/arm/mach-uniphier/sbc/sbc-ld11.c b/arch/arm/mach-uniphier/sbc/sbc-ld11.c index 44d8a1e3bd94..21972ac9494b 100644 --- a/arch/arm/mach-uniphier/sbc/sbc-ld11.c +++ b/arch/arm/mach-uniphier/sbc/sbc-ld11.c @@ -12,6 +12,9 @@
void uniphier_ld11_sbc_init(void) { + if (!uniphier_sbc_is_enabled()) + return; + uniphier_sbc_init_savepin();
/* necessary for ROM boot ?? */ diff --git a/arch/arm/mach-uniphier/sbc/sbc-ld4.c b/arch/arm/mach-uniphier/sbc/sbc-ld4.c index d08b571e23c1..72e9743c8f8a 100644 --- a/arch/arm/mach-uniphier/sbc/sbc-ld4.c +++ b/arch/arm/mach-uniphier/sbc/sbc-ld4.c @@ -13,6 +13,9 @@ void uniphier_ld4_sbc_init(void) { u32 tmp;
+ if (!uniphier_sbc_is_enabled()) + return; + uniphier_sbc_init_savepin();
/* system bus output enable */ diff --git a/arch/arm/mach-uniphier/sbc/sbc-pxs2.c b/arch/arm/mach-uniphier/sbc/sbc-pxs2.c index 8c167ef0698b..3275f22ce96c 100644 --- a/arch/arm/mach-uniphier/sbc/sbc-pxs2.c +++ b/arch/arm/mach-uniphier/sbc/sbc-pxs2.c @@ -10,6 +10,9 @@
void uniphier_pxs2_sbc_init(void) { + if (!uniphier_sbc_is_enabled()) + return; + uniphier_sbc_init_savepin();
/* necessary for ROM boot ?? */ diff --git a/arch/arm/mach-uniphier/sbc/sbc-regs.h b/arch/arm/mach-uniphier/sbc/sbc-regs.h index 853015acbcab..e866816472b5 100644 --- a/arch/arm/mach-uniphier/sbc/sbc-regs.h +++ b/arch/arm/mach-uniphier/sbc/sbc-regs.h @@ -84,4 +84,6 @@ static inline int boot_is_swapped(void) } #endif
+int uniphier_sbc_is_enabled(void); + #endif /* ARCH_SBC_REGS_H */ diff --git a/arch/arm/mach-uniphier/sbc/sbc.c b/arch/arm/mach-uniphier/sbc/sbc.c index df01e5c01d51..6cf8cf2af80f 100644 --- a/arch/arm/mach-uniphier/sbc/sbc.c +++ b/arch/arm/mach-uniphier/sbc/sbc.c @@ -5,7 +5,9 @@ * Author: Masahiro Yamada yamada.masahiro@socionext.com */
+#include <common.h> #include <linux/io.h> +#include <asm/global_data.h>
#include "../init.h" #include "sbc-regs.h" @@ -31,6 +33,20 @@ #define SBCTRL2_SAVEPIN_MEM_VALUE 0x34000009 #define SBCTRL4_SAVEPIN_MEM_VALUE 0x02110210
+int uniphier_sbc_is_enabled(void) +{ + DECLARE_GLOBAL_DATA_PTR; + const void *fdt = gd->fdt_blob; + int offset; + + offset = fdt_node_offset_by_compatible(fdt, 0, + "socionext,uniphier-system-bus"); + if (offset < 0) + return 0; + + return fdtdec_get_is_enabled(fdt, offset); +} + static void __uniphier_sbc_init(int savepin) { /*