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Subject[PATCH v4 3/5] drivers: psci: refactor psci_cpu_init_idle in preparation for ACPI LPI support
Date
Inorder to accomodate bot DT and ACPI LPI support in psci_cpu_init_idle,
move the device tree specific into psci_dt_cpu_init_idle.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
drivers/firmware/psci.c | 23 +++++++++--------------
1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 11bfee8b79a9..af6c5c839568 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -250,11 +250,11 @@ static int __init psci_features(u32 psci_func_id)
#ifdef CONFIG_CPU_IDLE
static DEFINE_PER_CPU_READ_MOSTLY(u32 *, psci_power_state);

-static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu)
+static int psci_dt_cpu_init_idle(unsigned int cpu)
{
int i, ret, count = 0;
u32 *psci_states;
- struct device_node *state_node;
+ struct device_node *state_node, *cpu_node;

/*
* If the PSCI cpu_suspend function hook has not been initialized
@@ -263,6 +263,10 @@ static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu)
if (!psci_ops.cpu_suspend)
return -EOPNOTSUPP;

+ cpu_node = of_get_cpu_node(cpu, NULL);
+ if (!cpu_node)
+ return -ENODEV;
+
/* Count idle states */
while ((state_node = of_parse_phandle(cpu_node, "cpu-idle-states",
count))) {
@@ -303,27 +307,18 @@ static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu)
}
/* Idle states parsed correctly, initialize per-cpu pointer */
per_cpu(psci_power_state, cpu) = psci_states;
+ of_node_put(cpu_node);
return 0;

free_mem:
+ of_node_put(cpu_node);
kfree(psci_states);
return ret;
}

int psci_cpu_init_idle(unsigned int cpu)
{
- struct device_node *cpu_node;
- int ret;
-
- cpu_node = of_get_cpu_node(cpu, NULL);
- if (!cpu_node)
- return -ENODEV;
-
- ret = psci_dt_cpu_init_idle(cpu_node, cpu);
-
- of_node_put(cpu_node);
-
- return ret;
+ return psci_dt_cpu_init_idle(cpu);
}

static int psci_suspend_finisher(unsigned long index)
--
1.9.1
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