ARM: at91: pm: add support for sama5d2 secure suspend

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When running with OP-TEE, the suspend control is handled securely.
Suspend can be entered using PSCI support. Since the sama5d2 supports
multiple suspend modes, add a new CONFIG_ATMEL_SECURE_PM which will
send a SMC call to select the suspend mode at init time.

"atmel.pm_modes" boot argument is still supported for compatibility
purposes but the standby value is actually ignored since PSCI suspend
is used and it only support one mode (suspend).

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>

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Clément Léger 2022-05-02 17:22:19 +02:00 • committed by Claudiu Beznea

parent 0c9fd82117

commit f2f5cf78a3

3 changed files with 50 additions and 1 deletions

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11

arch/arm/mach-at91/Kconfig

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36

arch/arm/mach-at91/pm.c

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4

arch/arm/mach-at91/sam_secure.h

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