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counter: cmsdk_apb_dualtimer: Use clock freq from DT clocks

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Previously, the CMSDK APB dual timer driver hardcoded the counter
clock frequency to 24 MHz, which limits reuse across SoCs and
boards with different timer clock sources.

This patch replaces the hardcoded frequency with a value derived
from the device tree's `clocks` phandle, using the
`clock-frequency` property of the referenced clock controller node.

If the property is missing, it falls back to a default 24 MHz.

Signed-off-by: Lidor T <lidor@exibit-iot.com>
This commit is contained in:
Lidor T 2025-07-09 13:02:10 +03:00 committed by Anas Nashif
parent 5ef8a576bf
commit b68058787e
1 changed files with 15 additions and 1 deletions
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16
drivers/counter/timer_dtmr_cmsdk_apb.c
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@ -19,6 +19,20 @@
#include "dualtimer_cmsdk_apb.h"
#define DTIMER_NODE(inst) DT_INST(inst, arm_cmsdk_dtimer)
#define CLOCK_NODE(inst) DT_PHANDLE(DTIMER_NODE(inst), clocks)
#define HAS_DTIMER_CLOCK(inst) DT_NODE_HAS_PROP(DTIMER_NODE(inst), clocks)
#define HAS_CLOCK_FREQUENCY(inst) DT_NODE_HAS_PROP(CLOCK_NODE(inst), clock_frequency)
#if HAS_DTIMER_CLOCK(inst) && HAS_CLOCK_FREQUENCY(inst)
#define DTIMER_CMSDK_FREQ(inst) \
DT_INST_PROP_BY_PHANDLE(inst, clocks, clock_frequency)
#else
#define DTIMER_CMSDK_FREQ(inst) \
24000000U /* fallback default */
#endif /* HAS_DTIMER_CLOCK(inst) && HAS_CLOCK_FREQUENCY(inst) */
typedef void (*dtimer_config_func_t)(const struct device *dev);
struct dtmr_cmsdk_apb_cfg {
@ -176,7 +190,7 @@ static int dtmr_cmsdk_apb_init(const struct device *dev)
dtmr_cmsdk_apb_cfg_##inst = { \
.info = { \
.max_top_value = UINT32_MAX, \
.freq = 24000000U, \
.freq = DTIMER_CMSDK_FREQ(inst), \
.flags = COUNTER_CONFIG_INFO_COUNT_UP, \
.channels = 0U, \
}, \