esp-idf/components/hal/esp32h2/clk_tree_hal.c

88 lines
2.4 KiB
C

/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "soc/clkout_channel.h"
#include "hal/assert.h"
#include "hal/clk_tree_hal.h"
#include "hal/clk_tree_ll.h"
#include "hal/gpio_ll.h"
#include "hal/log.h"
static const char *CLK_HAL_TAG = "clk_hal";
uint32_t clk_hal_soc_root_get_freq_mhz(soc_cpu_clk_src_t cpu_clk_src)
{
switch (cpu_clk_src) {
case SOC_CPU_CLK_SRC_XTAL:
return clk_hal_xtal_get_freq_mhz();
case SOC_CPU_CLK_SRC_PLL:
return clk_ll_bbpll_get_freq_mhz();
case SOC_CPU_CLK_SRC_RC_FAST:
return SOC_CLK_RC_FAST_FREQ_APPROX / MHZ;
case SOC_CPU_CLK_SRC_FLASH_PLL:
return clk_ll_flash_pll_get_freq_mhz();
default:
// Unknown CPU_CLK mux input
HAL_ASSERT(false);
return 0;
}
}
uint32_t clk_hal_cpu_get_freq_hz(void)
{
soc_cpu_clk_src_t source = clk_ll_cpu_get_src();
return clk_hal_soc_root_get_freq_mhz(source) * MHZ / clk_ll_cpu_get_divider();
}
static uint32_t clk_hal_ahb_get_freq_hz(void)
{
soc_cpu_clk_src_t source = clk_ll_cpu_get_src();
return clk_hal_soc_root_get_freq_mhz(source) * MHZ / clk_ll_ahb_get_divider();
}
uint32_t clk_hal_apb_get_freq_hz(void)
{
return clk_hal_ahb_get_freq_hz() / clk_ll_apb_get_divider();
}
uint32_t clk_hal_lp_slow_get_freq_hz(void)
{
switch (clk_ll_rtc_slow_get_src()) {
case SOC_RTC_SLOW_CLK_SRC_RC_SLOW:
return SOC_CLK_RC_SLOW_FREQ_APPROX;
case SOC_RTC_SLOW_CLK_SRC_XTAL32K:
return SOC_CLK_XTAL32K_FREQ_APPROX;
case SOC_RTC_SLOW_CLK_SRC_OSC_SLOW:
return SOC_CLK_OSC_SLOW_FREQ_APPROX;
case SOC_RTC_SLOW_CLK_SRC_RC32K:
return SOC_CLK_RC32K_FREQ_APPROX;
default:
// Unknown RTC_SLOW_CLK mux input
HAL_ASSERT(false);
return 0;
}
}
uint32_t clk_hal_xtal_get_freq_mhz(void)
{
uint32_t freq = clk_ll_xtal_load_freq_mhz();
if (freq == 0) {
HAL_LOGW(CLK_HAL_TAG, "invalid RTC_XTAL_FREQ_REG value, assume 32MHz");
return (uint32_t)SOC_XTAL_FREQ_32M;
}
return freq;
}
void clk_hal_clock_output_setup(soc_clkout_sig_id_t clk_sig, clock_out_channel_t channel_id)
{
gpio_ll_set_pin_ctrl(clk_sig, CLKOUT_CHANNEL_MASK(channel_id), CLKOUT_CHANNEL_SHIFT(channel_id));
}
void clk_hal_clock_output_teardown(clock_out_channel_t channel_id)
{
gpio_ll_set_pin_ctrl(0, CLKOUT_CHANNEL_MASK(channel_id), CLKOUT_CHANNEL_SHIFT(channel_id));
}