[03/18] cpuidle: dt: Support hierarchical CPU idle states

Message ID 20190513192300.653-4-ulf.hansson@linaro.org
State Accepted
Commit 778f173eb4528a6b48ff6a8600515899de75333c
Headers show
Series
  • ARM/ARM64: Support hierarchical CPU arrangement for PSCI
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Commit Message

Ulf Hansson May 13, 2019, 7:22 p.m.
From: Lina Iyer <lina.iyer@linaro.org>


Currently CPU's idle states are represented in a flattened model, via the
"cpu-idle-states" binding from within the CPU's device nodes.

Support the hierarchical layout during parsing and validating of the CPU's
idle states. This is simply done by calling the new OF helper,
of_get_cpu_state_node().

Suggested-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>

Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Co-developed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

---

Changes:
	- None.

---
 drivers/cpuidle/dt_idle_states.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

-- 
2.17.1

Patch

diff --git a/drivers/cpuidle/dt_idle_states.c b/drivers/cpuidle/dt_idle_states.c
index add9569636b5..97ad25399ca8 100644
--- a/drivers/cpuidle/dt_idle_states.c
+++ b/drivers/cpuidle/dt_idle_states.c
@@ -114,8 +114,7 @@  static bool idle_state_valid(struct device_node *state_node, unsigned int idx,
 	for (cpu = cpumask_next(cpumask_first(cpumask), cpumask);
 	     cpu < nr_cpu_ids; cpu = cpumask_next(cpu, cpumask)) {
 		cpu_node = of_cpu_device_node_get(cpu);
-		curr_state_node = of_parse_phandle(cpu_node, "cpu-idle-states",
-						   idx);
+		curr_state_node = of_get_cpu_state_node(cpu_node, idx);
 		if (state_node != curr_state_node)
 			valid = false;
 
@@ -173,7 +172,7 @@  int dt_init_idle_driver(struct cpuidle_driver *drv,
 	cpu_node = of_cpu_device_node_get(cpumask_first(cpumask));
 
 	for (i = 0; ; i++) {
-		state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i);
+		state_node = of_get_cpu_state_node(cpu_node, i);
 		if (!state_node)
 			break;