adc: unify adc_ll_num_t and adc_unit_t

components/hal/include/hal/adc_hal_common.h

@@ -0,0 +1,38 @@
+/*
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * This header file is only for hardware abstract concepts and APIs
+ * used by both ADC RTC controller and Digital controller
+ */
+
+/**
+ * ADC work mode
+ */
+typedef enum adc_hal_work_mode_t {
+    ADC_HAL_ULP_MODE,
+    ADC_HAL_SINGLE_READ_MODE,
+    ADC_HAL_CONTINUOUS_READ_MODE,
+    ADC_HAL_PWDET_MODE
+} adc_hal_work_mode_t;
+
+/**
+ * Set ADC work mode
+ *
+ * @param unit       ADC unit
+ * @param work_mode  see `adc_hal_work_mode_t`
+ */
+void adc_hal_set_controller(adc_unit_t unit, adc_hal_work_mode_t work_mode);
+
+#ifdef __cplusplus
+}
+#endif