Re: [PATCH v2 3/3] ARM: tegra: set CPU reset handler with firmwareop

From: Stephen Warren
Date: Thu Jun 13 2013 - 15:23:52 EST

On 06/13/2013 03:12 AM, Alexandre Courbot wrote:
> Use a firmware operation to set the CPU reset handler and only resort to
> doing it ourselves if there is none defined.
> This supports the booting of secondary CPUs on devices using a TrustZone
> secure monitor.

> diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c

> + err = call_firmware_op(set_cpu_boot_addr, 0, reset_address);
> + switch (err) {
> + case -ENOSYS:
> + tegra_cpu_reset_handler_set(reset_address);
> + /* pass-through */

Rather than detecting -ENOSYS and falling back to the custom
tegra_cpu_reset_handler_set(), does it make sense to plug in
tegra_cpu_reset_handler_set as the firmware op when there is no secure
firmware detected? That way, this code wouldn't need the special case;
that would be isolated to firmware.c.
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