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esp32/machine_timer: Enable timer clock source for ESP32C6.

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Otherwise the PLL is not enabled.  These changes are adapted from
`timer_legacy.h` in ESP-IDF.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>
This commit is contained in:
Angus Gratton
2025-08-06 15:47:15 +10:00
committed by Damien George
parent d5ecda05eb
commit ce109af712
1 changed files with 12 additions and 0 deletions
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12
ports/esp32/machine_timer.c
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@@ -38,6 +38,8 @@
#include "hal/timer_hal.h"
#include "hal/timer_ll.h"
#include "soc/timer_periph.h"
#include "esp_private/esp_clk_tree_common.h"
#include "esp_private/periph_ctrl.h"
#include "machine_timer.h"
#define TIMER_DIVIDER 8
@@ -163,8 +165,18 @@ static void machine_timer_isr_handler(machine_timer_obj_t *self) {
void machine_timer_enable(machine_timer_obj_t *self) {
// Initialise the timer.
timer_hal_init(&self->hal_context, self->group, self->index);
PERIPH_RCC_ACQUIRE_ATOMIC(timer_group_periph_signals.groups[self->index].module, ref_count) {
if (ref_count == 0) {
timer_ll_enable_bus_clock(self->index, true);
timer_ll_reset_register(self->index);
}
}
timer_ll_enable_counter(self->hal_context.dev, self->index, false);
esp_clk_tree_enable_src(GPTIMER_CLK_SRC_DEFAULT, true);
timer_ll_set_clock_source(self->hal_context.dev, self->index, GPTIMER_CLK_SRC_DEFAULT);
timer_ll_enable_clock(self->hal_context.dev, self->index, true);
timer_ll_set_clock_prescale(self->hal_context.dev, self->index, TIMER_DIVIDER);
timer_hal_set_counter_value(&self->hal_context, 0);
timer_ll_set_count_direction(self->hal_context.dev, self->index, GPTIMER_COUNT_UP);