Randy, which SH3 chipset target are you building for? Of course all that stay need to be converted to device tree, but a DT SH3 proof of existence that you build for already will surely cover good swath of the missing drivers.
J.
> On Feb 4, 2023, at 14:51, Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
>
> When CONFIG_OF_EARLY_FLATTREE and CONFIG_SH_DEVICE_TREE are not set,
> SH3 build fails with a call to early_init_dt_scan(), so in
> arch/sh/kernel/setup.c and arch/sh/kernel/head_32.S, use
> CONFIG_OF_EARLY_FLATTREE instead of CONFIG_OF_FLATTREE.
>
> Fixes this build error:
> ../arch/sh/kernel/setup.c: In function 'sh_fdt_init':
> ../arch/sh/kernel/setup.c:262:26: error: implicit declaration of function 'early_init_dt_scan' [-Werror=implicit-function-declaration]
> 262 | if (!dt_virt || !early_init_dt_scan(dt_virt)) {
>
> Fixes: 03767daa1387 ("sh: fix build regression with CONFIG_OF && !CONFIG_OF_FLATTREE")
> Fixes: eb6b6930a70f ("sh: fix memory corruption of unflattened device tree")
> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Suggested-by: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Frank Rowand <frowand.list@xxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: Rich Felker <dalias@xxxxxxxx>
> Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-sh@xxxxxxxxxxxxxxx
> ---
> v2: use Suggested-by: for Rob.
> add more Cc's.
>
> arch/sh/kernel/head_32.S | 6 +++---
> arch/sh/kernel/setup.c | 4 ++--
> 2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff arch/sh/kernel/setup.c arch/sh/kernel/setup.c
> diff -- a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
> --- a/arch/sh/kernel/setup.c
> +++ b/arch/sh/kernel/setup.c
> @@ -244,7 +244,7 @@ void __init __weak plat_early_device_set
> {
> }
>
> -#ifdef CONFIG_OF_FLATTREE
> +#ifdef CONFIG_OF_EARLY_FLATTREE
> void __ref sh_fdt_init(phys_addr_t dt_phys)
> {
> static int done = 0;
> @@ -326,7 +326,7 @@ void __init setup_arch(char **cmdline_p)
> /* Let earlyprintk output early console messages */
> sh_early_platform_driver_probe("earlyprintk", 1, 1);
>
> -#ifdef CONFIG_OF_FLATTREE
> +#ifdef CONFIG_OF_EARLY_FLATTREE
> #ifdef CONFIG_USE_BUILTIN_DTB
> unflatten_and_copy_device_tree();
> #else
> diff -- a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
> --- a/arch/sh/kernel/head_32.S
> +++ b/arch/sh/kernel/head_32.S
> @@ -64,7 +64,7 @@ ENTRY(_stext)
> ldc r0, r6_bank
> #endif
>
> -#ifdef CONFIG_OF_FLATTREE
> +#ifdef CONFIG_OF_EARLY_FLATTREE
> mov r4, r12 ! Store device tree blob pointer in r12
> #endif
>
> @@ -315,7 +315,7 @@ ENTRY(_stext)
> 10:
> #endif
>
> -#ifdef CONFIG_OF_FLATTREE
> +#ifdef CONFIG_OF_EARLY_FLATTREE
> mov.l 8f, r0 ! Make flat device tree available early.
> jsr @r0
> mov r12, r4
> @@ -346,7 +346,7 @@ ENTRY(stack_start)
> 5: .long start_kernel
> 6: .long cpu_init
> 7: .long init_thread_union
> -#if defined(CONFIG_OF_FLATTREE)
> +#if defined(CONFIG_OF_EARLY_FLATTREE)
> 8: .long sh_fdt_init
> #endif
>
