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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-05-26 18:49:01 +0300
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-10-02 16:35:16 +0300
commit068654c200cc32966ce7906ca0bd096b9b97e988 (patch)
treed0b7c97952230aa8897b066f37fcf41a9d57be54 /drivers/firmware
parent2217d7c68e5caf50ec86b8c75c76bf06eb4b2c45 (diff)
downloadlinux-068654c200cc32966ce7906ca0bd096b9b97e988.tar.xz
drivers: firmware: psci: move power_state handling to generic code
Functions implemented on arm64 to check if a power_state parameter is valid and if the power_state implies context loss are not arm64 specific and should be moved to generic code so that they can be reused on arm systems too. This patch moves the functions handling the power_state parameter to generic PSCI firmware layer code. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Jisheng Zhang <jszhang@marvell.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Mark Rutland <mark.rutland@arm.com>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/psci.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 0821e332c85a..3157eb0ef300 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -70,6 +70,21 @@ enum psci_function {
static u32 psci_function_id[PSCI_FN_MAX];
+#define PSCI_0_2_POWER_STATE_MASK \
+ (PSCI_0_2_POWER_STATE_ID_MASK | \
+ PSCI_0_2_POWER_STATE_TYPE_MASK | \
+ PSCI_0_2_POWER_STATE_AFFL_MASK)
+
+bool psci_power_state_loses_context(u32 state)
+{
+ return state & PSCI_0_2_POWER_STATE_TYPE_MASK;
+}
+
+bool psci_power_state_is_valid(u32 state)
+{
+ return !(state & ~PSCI_0_2_POWER_STATE_MASK);
+}
+
static int psci_to_linux_errno(int errno)
{
switch (errno) {