From a749488f9f973158fe505be382c0813821e13201 Mon Sep 17 00:00:00 2001
From: xiongyu <xiongyu@espressif.com>
Date: Fri, 27 Dec 2019 20:27:01 +0800
Subject: [PATCH] bugfix(driver): fix i2s and timergroup some issues

* fix i2s and timergroup dev array used by isr crash issue

* Closes IDFGH-2432

* Closes https://github.com/espressif/esp-idf/issues/4545

* fix i2s adc data inv issue

* Closes IDFGH-2444

* Closes https://github.com/espressif/esp-idf/issues/4557
---
 components/driver/i2s.c        | 3 ++-
 components/driver/rtc_module.c | 2 ++
 components/driver/timer.c      | 3 ++-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/components/driver/i2s.c b/components/driver/i2s.c
index c079082e8e..8435395933 100644
--- a/components/driver/i2s.c
+++ b/components/driver/i2s.c
@@ -99,7 +99,8 @@ typedef struct {
 } i2s_obj_t;
 
 static i2s_obj_t *p_i2s_obj[I2S_NUM_MAX] = {0};
-static i2s_dev_t* I2S[I2S_NUM_MAX] = {&I2S0, &I2S1};
+/* DRAM_ATTR is required to avoid I2S array placed in flash, due to accessed from ISR */
+static DRAM_ATTR i2s_dev_t* I2S[I2S_NUM_MAX] = {&I2S0, &I2S1};
 static portMUX_TYPE i2s_spinlock[I2S_NUM_MAX] = {portMUX_INITIALIZER_UNLOCKED, portMUX_INITIALIZER_UNLOCKED};
 static int _i2s_adc_unit = -1;
 static int _i2s_adc_channel = -1;
diff --git a/components/driver/rtc_module.c b/components/driver/rtc_module.c
index d36acc6dba..a072bca15c 100644
--- a/components/driver/rtc_module.c
+++ b/components/driver/rtc_module.c
@@ -1217,10 +1217,12 @@ esp_err_t adc_set_data_inv(adc_unit_t adc_unit, bool inv_en)
     if (adc_unit & ADC_UNIT_1) {
         // Enable ADC data invert
         SENS.sar_read_ctrl.sar1_data_inv = inv_en;
+        SYSCON.saradc_ctrl2.sar1_inv = inv_en;
     }
     if (adc_unit & ADC_UNIT_2) {
         // Enable ADC data invert
         SENS.sar_read_ctrl2.sar2_data_inv = inv_en;
+        SYSCON.saradc_ctrl2.sar2_inv = inv_en;
     }
     portEXIT_CRITICAL(&rtc_spinlock);
     return ESP_OK;
diff --git a/components/driver/timer.c b/components/driver/timer.c
index 5881a58acc..bca443faa6 100644
--- a/components/driver/timer.c
+++ b/components/driver/timer.c
@@ -36,7 +36,8 @@ static const char* TIMER_TAG = "timer_group";
 #define TIMER_SCALE_ERROR       "HW TIMER SCALE ERROR"
 #define TIMER_ALARM_ERROR       "HW TIMER ALARM ERROR"
 #define DIVIDER_RANGE_ERROR     "HW TIMER divider outside of [2, 65536] range error"
-static timg_dev_t *TG[2] = {&TIMERG0, &TIMERG1};
+/* DRAM_ATTR is required to avoid TG array placed in flash, due to accessed from ISR */
+static DRAM_ATTR timg_dev_t *TG[2] = {&TIMERG0, &TIMERG1};
 static portMUX_TYPE timer_spinlock[TIMER_GROUP_MAX] = {portMUX_INITIALIZER_UNLOCKED, portMUX_INITIALIZER_UNLOCKED};
 
 #define TIMER_ENTER_CRITICAL(mux)      portENTER_CRITICAL_SAFE(mux);