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Merge branch 'fix/fix_s2_s3_rtc_iomux_clock_management_v5.0' into 'release/v5.0'

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fix(esp_hw_support): fix esp32s2/esp32s3 RTC IOMUX clock management (v5.0)

See merge request espressif/esp-idf!37172
This commit is contained in:
Jiang Jiang Jian 2025-02-28 11:41:20 +08:00
commit ad2af15233
14 changed files with 245 additions and 16 deletions
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17
components/driver/gpio/gpio.c
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -22,6 +22,7 @@
#include "esp_check.h"
#include "hal/gpio_hal.h"
#include "esp_rom_gpio.h"
#include "esp_private/io_mux.h"
static const char *GPIO_TAG = "gpio";
#define GPIO_CHECK(a, str, ret_val) ESP_RETURN_ON_FALSE(a, ret_val, GPIO_TAG, "%s", str)
@ -575,6 +576,11 @@ esp_err_t gpio_wakeup_enable(gpio_num_t gpio_num, gpio_int_type_t intr_type)
if ((intr_type == GPIO_INTR_LOW_LEVEL) || (intr_type == GPIO_INTR_HIGH_LEVEL)) {
#if SOC_RTCIO_WAKE_SUPPORTED
if (rtc_gpio_is_valid_gpio(gpio_num)) {
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
// LP_IO Wake-up function does not depend on LP_IO Matrix, but uses its clock to
// sample the wake-up signal, we need to enable the LP_IO clock here.
io_mux_enable_lp_io_clock(gpio_num, true);
#endif
ret = rtc_gpio_wakeup_enable(gpio_num, intr_type);
}
#endif
@ -600,6 +606,9 @@ esp_err_t gpio_wakeup_disable(gpio_num_t gpio_num)
#if SOC_RTCIO_WAKE_SUPPORTED
if (rtc_gpio_is_valid_gpio(gpio_num)) {
ret = rtc_gpio_wakeup_disable(gpio_num);
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
io_mux_enable_lp_io_clock(gpio_num, false);
#endif
}
#endif
portENTER_CRITICAL(&gpio_context.gpio_spinlock);
@ -926,6 +935,9 @@ esp_err_t gpio_deep_sleep_wakeup_enable(gpio_num_t gpio_num, gpio_int_type_t int
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&gpio_context.gpio_spinlock);
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
io_mux_enable_lp_io_clock(gpio_num, true);
#endif
gpio_hal_deepsleep_wakeup_enable(gpio_context.gpio_hal, gpio_num, intr_type);
#if CONFIG_ESP_SLEEP_GPIO_RESET_WORKAROUND || CONFIG_PM_SLP_DISABLE_GPIO
gpio_hal_sleep_sel_dis(gpio_context.gpio_hal, gpio_num);
@ -944,6 +956,9 @@ esp_err_t gpio_deep_sleep_wakeup_disable(gpio_num_t gpio_num)
gpio_hal_deepsleep_wakeup_disable(gpio_context.gpio_hal, gpio_num);
#if CONFIG_ESP_SLEEP_GPIO_RESET_WORKAROUND || CONFIG_PM_SLP_DISABLE_GPIO
gpio_hal_sleep_sel_en(gpio_context.gpio_hal, gpio_num);
#endif
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
io_mux_enable_lp_io_clock(gpio_num, false);
#endif
portEXIT_CRITICAL(&gpio_context.gpio_spinlock);
return ESP_OK;

10
components/driver/gpio/rtc_io.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2019-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -8,6 +8,7 @@
#include "esp_log.h"
#include "esp_err.h"
#include "esp_check.h"
#include "esp_private/io_mux.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "freertos/timers.h"
@ -30,6 +31,9 @@ esp_err_t rtc_gpio_init(gpio_num_t gpio_num)
{
ESP_RETURN_ON_FALSE(rtc_gpio_is_valid_gpio(gpio_num), ESP_ERR_INVALID_ARG, RTCIO_TAG, "RTCIO number error");
RTCIO_ENTER_CRITICAL();
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
io_mux_enable_lp_io_clock(gpio_num, true);
#endif
rtcio_hal_function_select(rtc_io_number_get(gpio_num), RTCIO_FUNC_RTC);
RTCIO_EXIT_CRITICAL();
@ -42,6 +46,10 @@ esp_err_t rtc_gpio_deinit(gpio_num_t gpio_num)
RTCIO_ENTER_CRITICAL();
// Select Gpio as Digital Gpio
rtcio_hal_function_select(rtc_io_number_get(gpio_num), RTCIO_FUNC_DIGITAL);
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
io_mux_force_disable_lp_io_clock(gpio_num);
#endif
RTCIO_EXIT_CRITICAL();
return ESP_OK;

4
components/esp_hw_support/CMakeLists.txt
View File

@ -21,6 +21,10 @@ if(NOT BOOTLOADER_BUILD)
"sar_periph_ctrl_common.c"
"adc_share_hw_ctrl.c")
if(CONFIG_SOC_LP_IO_CLOCK_IS_INDEPENDENT)
list(APPEND srcs "port/${target}/io_mux.c")
endif()
if(NOT CONFIG_IDF_TARGET_ESP32 AND NOT CONFIG_IDF_TARGET_ESP32S2)
list(APPEND srcs "sleep_retention.c")
endif()

42
components/esp_hw_support/include/esp_private/io_mux.h Normal file
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@ -0,0 +1,42 @@
/*
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdbool.h>
#include "esp_err.h"
#include "soc/clk_tree_defs.h"
#include "soc/soc_caps.h"
#include "soc/io_mux_reg.h"
#include "hal/gpio_types.h"
#ifdef __cplusplus
extern "C" {
#endif
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
typedef struct {
uint8_t rtc_io_enabled_cnt[MAX_RTC_GPIO_NUM];
uint32_t rtc_io_using_mask;
} rtc_io_status_t;
/**
* Enable/Disable LP_IO peripheral clock.
* @param gpio_num GPIO number
* @param enable true to enable the clock / false to disable the clock
*/
void io_mux_enable_lp_io_clock(gpio_num_t gpio_num, bool enable);
/**
* Force disable one LP_IO to clock dependency
* @param gpio_num GPIO number
*/
void io_mux_force_disable_lp_io_clock(gpio_num_t gpio_num);
#endif
#ifdef __cplusplus
}
#endif

61
components/esp_hw_support/port/esp32s2/io_mux.c Normal file
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@ -0,0 +1,61 @@
/*
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include "esp_attr.h"
#include "freertos/FreeRTOS.h"
#include "esp_private/io_mux.h"
#include "hal/rtc_io_ll.h"
#define RTCIO_RCC_ATOMIC() \
for (int _rc_cnt = 1; \
_rc_cnt ? (portENTER_CRITICAL(&rtc_spinlock), 1) : 0; \
portEXIT_CRITICAL(&rtc_spinlock), _rc_cnt--)
extern portMUX_TYPE rtc_spinlock;
static portMUX_TYPE s_io_mux_spinlock = portMUX_INITIALIZER_UNLOCKED;
static rtc_io_status_t s_rtc_io_status = {
.rtc_io_enabled_cnt = { 0 },
.rtc_io_using_mask = 0
};
void io_mux_enable_lp_io_clock(gpio_num_t gpio_num, bool enable)
{
portENTER_CRITICAL(&s_io_mux_spinlock);
if (enable) {
if (s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] == 0) {
s_rtc_io_status.rtc_io_using_mask |= (1ULL << gpio_num);
}
s_rtc_io_status.rtc_io_enabled_cnt[gpio_num]++;
} else if (!enable && (s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] > 0)) {
s_rtc_io_status.rtc_io_enabled_cnt[gpio_num]--;
if (s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] == 0) {
s_rtc_io_status.rtc_io_using_mask &= ~(1ULL << gpio_num);
}
}
RTCIO_RCC_ATOMIC() {
if (s_rtc_io_status.rtc_io_using_mask == 0) {
rtcio_ll_enable_io_clock(false);
} else {
rtcio_ll_enable_io_clock(true);
}
}
portEXIT_CRITICAL(&s_io_mux_spinlock);
}
void io_mux_force_disable_lp_io_clock(gpio_num_t gpio_num)
{
portENTER_CRITICAL(&s_io_mux_spinlock);
s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] = 0;
s_rtc_io_status.rtc_io_using_mask &= ~(1ULL << gpio_num);
if (s_rtc_io_status.rtc_io_using_mask == 0) {
RTCIO_RCC_ATOMIC() {
rtcio_ll_enable_io_clock(false);
}
}
portEXIT_CRITICAL(&s_io_mux_spinlock);
}

61
components/esp_hw_support/port/esp32s3/io_mux.c Normal file
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@ -0,0 +1,61 @@
/*
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include "esp_attr.h"
#include "freertos/FreeRTOS.h"
#include "esp_private/io_mux.h"
#include "hal/rtc_io_ll.h"
#define RTCIO_RCC_ATOMIC() \
for (int _rc_cnt = 1; \
_rc_cnt ? (portENTER_CRITICAL(&rtc_spinlock), 1) : 0; \
portEXIT_CRITICAL(&rtc_spinlock), _rc_cnt--)
extern portMUX_TYPE rtc_spinlock;
static portMUX_TYPE s_io_mux_spinlock = portMUX_INITIALIZER_UNLOCKED;
static rtc_io_status_t s_rtc_io_status = {
.rtc_io_enabled_cnt = { 0 },
.rtc_io_using_mask = 0
};
void io_mux_enable_lp_io_clock(gpio_num_t gpio_num, bool enable)
{
portENTER_CRITICAL(&s_io_mux_spinlock);
if (enable) {
if (s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] == 0) {
s_rtc_io_status.rtc_io_using_mask |= (1ULL << gpio_num);
}
s_rtc_io_status.rtc_io_enabled_cnt[gpio_num]++;
} else if (!enable && (s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] > 0)) {
s_rtc_io_status.rtc_io_enabled_cnt[gpio_num]--;
if (s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] == 0) {
s_rtc_io_status.rtc_io_using_mask &= ~(1ULL << gpio_num);
}
}
RTCIO_RCC_ATOMIC() {
if (s_rtc_io_status.rtc_io_using_mask == 0) {
rtcio_ll_enable_io_clock(false);
} else {
rtcio_ll_enable_io_clock(true);
}
}
portEXIT_CRITICAL(&s_io_mux_spinlock);
}
void io_mux_force_disable_lp_io_clock(gpio_num_t gpio_num)
{
portENTER_CRITICAL(&s_io_mux_spinlock);
s_rtc_io_status.rtc_io_enabled_cnt[gpio_num] = 0;
s_rtc_io_status.rtc_io_using_mask &= ~(1ULL << gpio_num);
if (s_rtc_io_status.rtc_io_using_mask == 0) {
RTCIO_RCC_ATOMIC() {
rtcio_ll_enable_io_clock(false);
}
}
portEXIT_CRITICAL(&s_io_mux_spinlock);
}

3
components/esp_hw_support/port/esp32s3/rtc_clk.c
View File

@ -20,6 +20,7 @@
#include "hal/usb_serial_jtag_ll.h"
#include "hal/clk_tree_ll.h"
#include "hal/regi2c_ctrl_ll.h"
#include "hal/rtc_io_ll.h"
#include "esp_private/regi2c_ctrl.h"
#include "soc/regi2c_dig_reg.h"
#include "soc/sens_reg.h"
@ -55,7 +56,7 @@ void rtc_clk_32k_enable(bool enable)
void rtc_clk_32k_enable_external(void)
{
PIN_INPUT_ENABLE(IO_MUX_GPIO15_REG);
SET_PERI_REG_MASK(SENS_SAR_PERI_CLK_GATE_CONF_REG, SENS_IOMUX_CLK_EN);
rtcio_ll_enable_io_clock(true);
SET_PERI_REG_MASK(RTC_CNTL_PAD_HOLD_REG, RTC_CNTL_X32P_HOLD);
clk_ll_xtal32k_enable(CLK_LL_XTAL32K_ENABLE_MODE_EXTERNAL);
}

12
components/esp_hw_support/sleep_modes.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -15,6 +15,7 @@
#include "esp_private/esp_sleep_internal.h"
#include "esp_private/esp_timer_private.h"
#include "esp_private/system_internal.h"
#include "esp_private/io_mux.h"
#include "esp_log.h"
#include "esp_newlib.h"
#include "esp_timer.h"
@ -1150,6 +1151,9 @@ esp_err_t esp_sleep_enable_ext0_wakeup(gpio_num_t gpio_num, int level)
static void ext0_wakeup_prepare(void)
{
int rtc_gpio_num = s_config.ext0_rtc_gpio_num;
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
rtcio_ll_enable_io_clock(true);
#endif
rtcio_hal_ext0_set_wakeup_pin(rtc_gpio_num, s_config.ext0_trigger_level);
rtcio_hal_function_select(rtc_gpio_num, RTCIO_FUNC_RTC);
rtcio_hal_input_enable(rtc_gpio_num);
@ -1187,6 +1191,9 @@ static void ext1_wakeup_prepare(void)
if ((rtc_gpio_mask & BIT(rtc_pin)) == 0) {
continue;
}
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
rtcio_ll_enable_io_clock(true);
#endif
#if SOC_RTCIO_INPUT_OUTPUT_SUPPORTED
// Route pad to RTC
rtcio_hal_function_select(rtc_pin, RTCIO_FUNC_RTC);
@ -1256,6 +1263,9 @@ static void gpio_deep_sleep_wakeup_prepare(void)
if (((1ULL << gpio_idx) & s_config.gpio_wakeup_mask) == 0) {
continue;
}
#if SOC_LP_IO_CLOCK_IS_INDEPENDENT
rtcio_ll_enable_io_clock(true);
#endif
#if CONFIG_ESP_SLEEP_GPIO_ENABLE_INTERNAL_RESISTORS
if (s_config.gpio_trigger_mode & BIT(gpio_idx)) {
ESP_ERROR_CHECK(gpio_pullup_dis(gpio_idx));

21
components/hal/esp32s2/include/hal/rtc_io_ll.h
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -13,6 +13,7 @@
#pragma once
#include <stdlib.h>
#include <stdbool.h>
#include "soc/rtc_io_periph.h"
#include "soc/rtc_io_struct.h"
#include "soc/sens_struct.h"
@ -26,7 +27,7 @@ extern "C" {
#endif
typedef enum {
RTCIO_FUNC_RTC = 0x0, /*!< The pin controled by RTC module. */
RTCIO_FUNC_RTC = 0x0, /*!< The pin controlled by RTC module. */
RTCIO_FUNC_DIGITAL = 0x1, /*!< The pin controlled by DIGITAL module. */
} rtcio_ll_func_t;
@ -41,6 +42,16 @@ typedef enum {
RTCIO_OUTPUT_OD = 0x1, /*!< RTCIO output mode is open-drain. */
} rtcio_ll_out_mode_t;
/**
* @brief Enable/Disable LP IOMUX clock.
*
* @param enable true to enable the clock / false to disable the clock
*/
static inline void rtcio_ll_enable_io_clock(bool enable)
{
SENS.sar_io_mux_conf.iomux_clk_gate_en = enable;
}
/**
* @brief Select the rtcio function.
*
@ -51,14 +62,12 @@ typedef enum {
static inline void rtcio_ll_function_select(int rtcio_num, rtcio_ll_func_t func)
{
if (func == RTCIO_FUNC_RTC) {
SENS.sar_io_mux_conf.iomux_clk_gate_en = 1;
// 0: GPIO connected to digital GPIO module. 1: GPIO connected to analog RTC module.
SET_PERI_REG_MASK(rtc_io_desc[rtcio_num].reg, (rtc_io_desc[rtcio_num].mux));
//0:RTC FUNCTION 1,2,3:Reserved
SET_PERI_REG_BITS(rtc_io_desc[rtcio_num].reg, RTC_IO_TOUCH_PAD1_FUN_SEL_V, RTCIO_LL_PIN_FUNC, rtc_io_desc[rtcio_num].func);
} else if (func == RTCIO_FUNC_DIGITAL) {
CLEAR_PERI_REG_MASK(rtc_io_desc[rtcio_num].reg, (rtc_io_desc[rtcio_num].mux));
SENS.sar_io_mux_conf.iomux_clk_gate_en = 0;
}
}
@ -271,8 +280,7 @@ static inline void rtcio_ll_force_unhold_all(void)
*/
static inline void rtcio_ll_wakeup_enable(int rtcio_num, rtcio_ll_wake_type_t type)
{
SENS.sar_io_mux_conf.iomux_clk_gate_en = 1;
RTCIO.pin[rtcio_num].wakeup_enable = 0x1;
RTCIO.pin[rtcio_num].wakeup_enable = 1;
RTCIO.pin[rtcio_num].int_type = type;
}
@ -283,7 +291,6 @@ static inline void rtcio_ll_wakeup_enable(int rtcio_num, rtcio_ll_wake_type_t ty
*/
static inline void rtcio_ll_wakeup_disable(int rtcio_num)
{
SENS.sar_io_mux_conf.iomux_clk_gate_en = 0;
RTCIO.pin[rtcio_num].wakeup_enable = 0;
RTCIO.pin[rtcio_num].int_type = RTCIO_WAKEUP_DISABLE;
}

18
components/hal/esp32s3/include/hal/rtc_io_ll.h
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -13,6 +13,7 @@
#pragma once
#include <stdlib.h>
#include <stdbool.h>
#include "soc/rtc_io_periph.h"
#include "soc/rtc_io_struct.h"
#include "hal/rtc_io_types.h"
@ -43,6 +44,16 @@ typedef enum {
RTCIO_OUTPUT_OD = 0x1, /*!< RTCIO output mode is open-drain. */
} rtcio_ll_out_mode_t;
/**
* @brief Enable/Disable LP IOMUX clock.
*
* @param enable true to enable the clock / false to disable the clock
*/
static inline void rtcio_ll_enable_io_clock(bool enable)
{
SENS.sar_peri_clk_gate_conf.iomux_clk_en = enable;
}
/**
* @brief Select the rtcio function.
*
@ -57,14 +68,12 @@ static inline void rtcio_ll_function_select(int rtcio_num, rtcio_ll_func_t func)
if (rtcio_num == rtc_io_num_map[USB_DM_GPIO_NUM] || rtcio_num == rtc_io_num_map[USB_DP_GPIO_NUM]) {
USB_SERIAL_JTAG.conf0.usb_pad_enable = 0;
}
SENS.sar_peri_clk_gate_conf.iomux_clk_en = 1;
// 0: GPIO connected to digital GPIO module. 1: GPIO connected to analog RTC module.
SET_PERI_REG_MASK(rtc_io_desc[rtcio_num].reg, (rtc_io_desc[rtcio_num].mux));
//0:RTC FUNCTION 1,2,3:Reserved
SET_PERI_REG_BITS(rtc_io_desc[rtcio_num].reg, RTC_IO_TOUCH_PAD1_FUN_SEL_V, RTCIO_LL_PIN_FUNC, rtc_io_desc[rtcio_num].func);
} else if (func == RTCIO_FUNC_DIGITAL) {
CLEAR_PERI_REG_MASK(rtc_io_desc[rtcio_num].reg, (rtc_io_desc[rtcio_num].mux));
SENS.sar_peri_clk_gate_conf.iomux_clk_en = 0;
// USB Serial JTAG pad re-enable won't be done here (it requires both DM and DP pins not in rtc function)
// Instead, USB_SERIAL_JTAG_USB_PAD_ENABLE needs to be guaranteed to be set in usb_serial_jtag driver
}
@ -297,8 +306,7 @@ static inline void rtcio_ll_force_unhold_all(void)
*/
static inline void rtcio_ll_wakeup_enable(int rtcio_num, rtcio_ll_wake_type_t type)
{
SENS.sar_peri_clk_gate_conf.iomux_clk_en = 1;
RTCIO.pin[rtcio_num].wakeup_enable = 0x1;
RTCIO.pin[rtcio_num].wakeup_enable = 1;
RTCIO.pin[rtcio_num].int_type = type;
}

4
components/soc/esp32s2/include/soc/Kconfig.soc_caps.in
View File

@ -539,6 +539,10 @@ config SOC_RTCIO_WAKE_SUPPORTED
bool
default y
config SOC_LP_IO_CLOCK_IS_INDEPENDENT
bool
default y
config SOC_SDM_GROUPS
int
default 1

2
components/soc/esp32s2/include/soc/soc_caps.h
View File

@ -241,6 +241,8 @@
#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1
#define SOC_RTCIO_HOLD_SUPPORTED 1
#define SOC_RTCIO_WAKE_SUPPORTED 1
// LP IO peripherals have independent clock gating to manage
#define SOC_LP_IO_CLOCK_IS_INDEPENDENT 1
/*-------------------------- Sigma Delta Modulator CAPS -----------------*/

4
components/soc/esp32s3/include/soc/Kconfig.soc_caps.in
View File

@ -627,6 +627,10 @@ config SOC_RTCIO_WAKE_SUPPORTED
bool
default y
config SOC_LP_IO_CLOCK_IS_INDEPENDENT
bool
default y
config SOC_SDM_GROUPS
bool
default y

2
components/soc/esp32s3/include/soc/soc_caps.h
View File

@ -257,6 +257,8 @@
#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1
#define SOC_RTCIO_HOLD_SUPPORTED 1
#define SOC_RTCIO_WAKE_SUPPORTED 1
// LP IO peripherals have independent clock gating to manage
#define SOC_LP_IO_CLOCK_IS_INDEPENDENT 1
/*-------------------------- Sigma Delta Modulator CAPS -----------------*/
#define SOC_SDM_GROUPS 1