On Mon, Mar 20, 2017 at 05:48:17PM +0000, Marc Zyngier wrote:
> We're currently stuck with DT when it comes to handling errata, which
> is pretty restrictive. In order to make things more flexible, let's
> introduce an infrastructure that could support alternative discovery
> methods. No change in functionality.
>
> Reviewed-by: Hanjun Guo <hanjun....@linaro.org>
> Signed-off-by: Marc Zyngier <marc.zyng...@arm.com>
> ---
> arch/arm64/include/asm/arch_timer.h | 7 +++-
> drivers/clocksource/arm_arch_timer.c | 80
> +++++++++++++++++++++++++++++++-----
> 2 files changed, 75 insertions(+), 12 deletions(-)
>
> diff --git a/arch/arm64/include/asm/arch_timer.h
> b/arch/arm64/include/asm/arch_timer.h
> index b4b34004a21e..5cd964e90d11 100644
> --- a/arch/arm64/include/asm/arch_timer.h
> +++ b/arch/arm64/include/asm/arch_timer.h
> @@ -37,9 +37,14 @@ extern struct static_key_false arch_timer_read_ool_enabled;
> #define needs_unstable_timer_counter_workaround() false
> #endif
>
> +enum arch_timer_erratum_match_type {
> + ate_match_dt,
> +};
>
> struct arch_timer_erratum_workaround {
> - const char *id; /* Indicate the Erratum ID */
> + enum arch_timer_erratum_match_type match_type;
Putting the match_fn instead will be much more simpler and the code won't
have to deal with ate_match_type, no ?
[ ... ]
> +static void arch_timer_check_ool_workaround(enum
> arch_timer_erratum_match_type type,
> + void *arg)
> +{
> + const struct arch_timer_erratum_workaround *wa;
> + ate_match_fn_t match_fn = NULL;
> +
> + if (static_branch_unlikely(&arch_timer_read_ool_enabled))
> + return;
> +
Why is this check necessary ?
[ ... ]
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