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cpu_freq: Validate P-states in devicetree in build time

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Validate P-states in devicetree in build time. If no
P-states are defined, a build error will be raised.

Signed-off-by: Zhaoxiang Jin <Zhaoxiang.Jin_1@nxp.com>
This commit is contained in:
Zhaoxiang Jin
2025-10-31 10:54:21 +08:00
committed by Anas Nashif
parent e5c0abb43b
commit 2194069d8d
1 changed files with 11 additions and 0 deletions
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11
subsys/cpu_freq/cpu_freq.c
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@@ -12,6 +12,17 @@
LOG_MODULE_REGISTER(cpu_freq, CONFIG_CPU_FREQ_LOG_LEVEL);
/* Build-time validation: require performance_states node with at least one child */
#define PSTATE_ROOT DT_PATH(performance_states)
#define CPU_FREQ_COUNT_OKAY_CHILD(_node_id) + 1
enum { CPU_FREQ_PSTATE_COUNT = 0 DT_FOREACH_CHILD_STATUS_OKAY(PSTATE_ROOT,
CPU_FREQ_COUNT_OKAY_CHILD) };
BUILD_ASSERT(DT_NODE_EXISTS(PSTATE_ROOT),
"cpu_freq: performance_states node missing in devicetree");
BUILD_ASSERT(CPU_FREQ_PSTATE_COUNT > 0,
"cpu_freq: No P-states defined in devicetree");
#if defined(CONFIG_SMP) && (CONFIG_MP_MAX_NUM_CPUS > 1)
static struct k_ipi_work cpu_freq_work;