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authorLorenzo Pieralisi2015-05-26 11:06:21 -0500
committerAlex Shi2016-01-20 05:26:31 -0600
commitd230b2cea7d14ec97904ddf5d0d55b865fdb5d1b (patch)
tree3587c7ad016c606cffaa568cf894067f6d8cd598 /drivers/firmware
parent5174c70759650c86a8f02173804d5946628e581f (diff)
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drivers: firmware: psci: add PSCI_FEATURES call
PSCI v1.0 introduces a PSCI_FEATURES call that allows to probe for features related to a specific function identifier. This patch adds PSCI_FEATURES support to the PSCI firmware layer. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Jisheng Zhang <jszhang@marvell.com> Cc: Mark Rutland <mark.rutland@arm.com> (cherry picked from commit 5f004e0c9fb152a080b47d06dc48bdd29765a734) Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/psci.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 462b0f95bae2..48ae95182b2a 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -197,6 +197,12 @@ static void psci_sys_poweroff(void)
197 invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0); 197 invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
198} 198}
199 199
200static int __init psci_features(u32 psci_func_id)
201{
202 return invoke_psci_fn(PSCI_1_0_FN_PSCI_FEATURES,
203 psci_func_id, 0, 0);
204}
205
200/* 206/*
201 * Detect the presence of a resident Trusted OS which may cause CPU_OFF to 207 * Detect the presence of a resident Trusted OS which may cause CPU_OFF to
202 * return DENIED (which would be fatal). 208 * return DENIED (which would be fatal).