[PATCH v6 1/4] arm: fiq: Add callbacks to manage FIQ routings
nicolas.pitre at linaro.org
Tue Jun 24 08:44:07 PDT 2014
On Tue, 24 Jun 2014, Daniel Thompson wrote:
> Currently enable_fiq/disable_fiq use a simple offset to convert an IRQ
> virq into a FIQ virq. This is too inflexible for multi-platform kernels
> and makes runtime error checking impossible.
> We solve this by introducing a flexible mapping that allows interrupt
> controllers that support FIQ to register those mappings. This, in turn,
> makes it much possible for drivers in DT kernels to install FIQ handlers
> without knowing anything about the interrupt controller.
> Signed-off-by: Daniel Thompson <daniel.thompson at linaro.org>
> Cc: Russell King <linux at arm.linux.org.uk>
> Cc: Fabio Estevam <festevam at gmail.com>
> Cc: Nicolas Pitre <nico at linaro.org>
> arch/arm/include/asm/fiq.h | 7 +++
> arch/arm/kernel/fiq.c | 103 ++++++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 108 insertions(+), 2 deletions(-)
> +bool has_fiq(int fiq)
> + struct fiq_data *data = lookup_fiq_data(fiq);
> + if (data)
> + return true;
> + if (fiq_start == -1)
> + return false;
> + return fiq > fiq_start;
Shouldn't this be fiq >= fiq_start ?
Other than that...
Acked-by: Nicolas Pitre <nico at linaro.org>
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