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    Subject[PATCH v6 06/11] ARM: sunxi: Add initialization of CNTVOFF
    Date
    Add the initialization of CNTVOFF for sun8i-a83t.

    For boot CPU, create a new machine that handles this
    function's call in an "init_early" callback. We need to initialize
    CNTVOFF before the arch timer's initialization otherwise, it will
    not be taken into account and fails to boot correctly.
    Because of that, this function can't be called in SMP's early_initcall
    function which is called after timer's init.

    For secondary CPUs, add this function into secondary_startup
    assembly entry.

    Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
    ---
    arch/arm/mach-sunxi/headsmp.S | 1 +
    arch/arm/mach-sunxi/sunxi.c | 20 +++++++++++++++++++-
    2 files changed, 20 insertions(+), 1 deletion(-)

    diff --git a/arch/arm/mach-sunxi/headsmp.S b/arch/arm/mach-sunxi/headsmp.S
    index 37dc772701f3..32d76be98541 100644
    --- a/arch/arm/mach-sunxi/headsmp.S
    +++ b/arch/arm/mach-sunxi/headsmp.S
    @@ -71,6 +71,7 @@ ENDPROC(sunxi_mc_smp_cluster_cache_enable)

    ENTRY(sunxi_mc_smp_secondary_startup)
    bl sunxi_mc_smp_cluster_cache_enable
    + bl secure_cntvoff_init
    b secondary_startup
    ENDPROC(sunxi_mc_smp_secondary_startup)

    diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
    index 5e9602ce1573..ddc439f6269b 100644
    --- a/arch/arm/mach-sunxi/sunxi.c
    +++ b/arch/arm/mach-sunxi/sunxi.c
    @@ -16,6 +16,7 @@
    #include <linux/platform_device.h>

    #include <asm/mach/arch.h>
    +#include <asm/secure_cntvoff.h>

    static const char * const sunxi_board_dt_compat[] = {
    "allwinner,sun4i-a10",
    @@ -62,7 +63,6 @@ MACHINE_END
    static const char * const sun8i_board_dt_compat[] = {
    "allwinner,sun8i-a23",
    "allwinner,sun8i-a33",
    - "allwinner,sun8i-a83t",
    "allwinner,sun8i-h2-plus",
    "allwinner,sun8i-h3",
    "allwinner,sun8i-r40",
    @@ -75,6 +75,24 @@ DT_MACHINE_START(SUN8I_DT, "Allwinner sun8i Family")
    .dt_compat = sun8i_board_dt_compat,
    MACHINE_END

    +void __init sun8i_cntvoff_init(void)
    +{
    +#ifdef CONFIG_SMP
    + secure_cntvoff_init();
    +#endif
    +}
    +
    +static const char * const sun8i_cntvoff_board_dt_compat[] = {
    + "allwinner,sun8i-a83t",
    + NULL,
    +};
    +
    +DT_MACHINE_START(SUN8I_CNTVOFF_DT, "Allwinner sun8i-a83t board")
    + .init_early = sun8i_cntvoff_init,
    + .init_time = sun6i_timer_init,
    + .dt_compat = sun8i_cntvoff_board_dt_compat,
    +MACHINE_END
    +
    static const char * const sun9i_board_dt_compat[] = {
    "allwinner,sun9i-a80",
    NULL,
    --
    2.11.0
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