[PATCH] firmware/psci: Add debugfs support to ease debugging

[Mark Brown]

On Wed, Jul 27, 2022 at 11:09:01PM +0300, Dmitry Baryshkov wrote:

> +} psci_fn_ids[] = {
> +	PSCI_ID_NATIVE(0_2, MIGRATE),
> +	PSCI_ID(0_2, MIGRATE_INFO_TYPE),
> +	PSCI_ID_NATIVE(0_2, MIGRATE_INFO_UP_CPU),
> +	PSCI_ID(1_0, CPU_FREEZE),
> +	PSCI_ID_NATIVE(1_0, CPU_DEFAULT_SUSPEND),
> +	PSCI_ID_NATIVE(1_0, NODE_HW_STATE),
> +	PSCI_ID_NATIVE(1_0, SYSTEM_SUSPEND),
> +	PSCI_ID(1_0, SET_SUSPEND_MODE),
> +	PSCI_ID_NATIVE(1_0, STAT_RESIDENCY),
> +	PSCI_ID_NATIVE(1_0, STAT_COUNT),
> +	PSCI_ID_NATIVE(1_1, SYSTEM_RESET2),
> +};

There's other functions like the MEM_PROTECT ones which we don't
currently use but it might be interesting to enumerate...

>  #define PSCI_1_0_FN_PSCI_FEATURES		PSCI_0_2_FN(10)
> +#define PSCI_1_0_FN_CPU_FREEZE			PSCI_0_2_FN(11)
> +#define PSCI_1_0_FN_CPU_DEFAULT_SUSPEND		PSCI_0_2_FN(12)

...we're already adding functions here.

> +#define PSCI_1_0_FN_NODE_HW_STATE		PSCI_0_2_FN(13)

> +#define PSCI_1_0_FN_STAT_RESIDENCY		PSCI_0_2_FN(16)
> +#define PSCI_1_0_FN_STAT_COUNT			PSCI_0_2_FN(17)

Some of these state query things might be interesting to actually call
and output results from at some point, doesn't seem like something that
should be a blocker though.
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