[PATCH] mips: econet: add EN751627 SoC Kconfig entry

[kpursoty at proton.me]

Thanks for your notes. Patch withdrawn.

On Wednesday, 15 April 2026 at 20:48, kpursoty at proton.me <kpursoty at proton.me> wrote:

>
> The EN751627 family (EN7516 DSL, EN7527 xPON) is a big-endian dual-core
> MIPS 1004Kc SoC (2 VPEs per core, NR_CPUS=4) used in DSL/WiFi gateway
> devices such as the ZyXEL EX3301-T0. It shares the MIPS GIC interrupt
> controller with EN7528 but is big-endian.
>
> Key differences from existing SoCs:
> - EN751221: BE, single-core 34Kc, custom INTC
> - EN7528:   LE, dual-core 1004Kc, MIPS GIC
> - EN751627: BE, dual-core 2-VPE 1004Kc, MIPS GIC
>
> The SMP plumbing (CM/CPC probe + CPS SMP ops) is shared with EN7528 and
> lives in patch 100 (device_tree_init). This patch adds only the Kconfig
> entry.
>
> Note: on EN751627, mips_cpc_probe() must be called before
> register_cps_smp_ops(). Without it, core 1 never comes online because
> write_gcr_co_reset_release(0) is insufficient on this SoC. This is
> different from EN7528 where CPC probe behaves identically. Both SoCs
> are covered by the shared #if in device_tree_init().
>
> Signed-off-by: Kervin Pursoty <kpursoty at proton.me>
> ---
>  arch/mips/econet/Kconfig | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/arch/mips/econet/Kconfig b/arch/mips/econet/Kconfig
> --- a/arch/mips/econet/Kconfig
> +++ b/arch/mips/econet/Kconfig
> @@ -41,3 +41,28 @@ choice
>  		  The EN7528 family with dual-core MIPS 1004Kc.
>  		  Requires MIPS_RAW_APPENDED_DTB=y for boot.
> +
> +	config SOC_ECONET_EN751627
> +		bool "EN751627 family"
> +		select COMMON_CLK
> +		select CPU_BIG_ENDIAN
> +		select HAVE_PCI
> +		select IRQ_MIPS_CPU
> +		select MIPS_CM
> +		select MIPS_CPC
> +		select MIPS_CPS
> +		select MIPS_CPU_SCACHE
> +		select MIPS_GIC
> +		select MIPS_MT_SMP
> +		select PCI_DRIVERS_GENERIC
> +		select SMP
> +		select SMP_UP
> +		select SYS_SUPPORTS_HIGHMEM
> +		select SYS_SUPPORTS_MIPS_CPS
> +		select SYS_SUPPORTS_MULTITHREADING
> +		select SYS_SUPPORTS_SMP
> +		help
> +		  The EN751627 family (EN7516 DSL, EN7527 xPON) with big-endian
> +		  dual-core, 2-VPE-per-core MIPS 1004Kc and MIPS GIC. Used in
> +		  DSL+WiFi gateways. Requires MIPS_RAW_APPENDED_DTB=y for boot.
>  endchoice
>