Refactor touch pad error logging (#11878)

- Removed duplicated log_e("No touch pad on selected pin!") calls from multiple functions.
- Centralized the error log inside digitalPinToTouchChannel().
- Extended the error message to include the pin number for better
  debugging context.
- Added log_e() in digitalPinToTouchChannel() when no touch sensor is available on the chip.

Co-authored-by: Me No Dev <me-no-dev@users.noreply.github.com>

Author: Kolodieiev

cores/esp32/esp32-hal-gpio.c

@@ -33,20 +33,21 @@
 #include "soc/touch_sensor_periph.h"
 
 int8_t digitalPinToTouchChannel(uint8_t pin) {
-  int8_t ret = -1;
   if (pin < SOC_GPIO_PIN_COUNT) {
     for (uint8_t i = 0; i < SOC_TOUCH_SENSOR_NUM; i++) {
       if (touch_sensor_channel_io_map[i] == pin) {
-        ret = i;
-        break;
+        return i;
       }
     }
   }
-  return ret;
+
+  log_e("No touch pad on selected pin(%u)!", pin);
+  return -1;
 }
 #else
 // No Touch Sensor available
 int8_t digitalPinToTouchChannel(uint8_t pin) {
+  log_e("Touch sensor not available on this chip");
   return -1;
 }
 #endif

cores/esp32/esp32-hal-touch-ng.c

@@ -332,7 +332,6 @@ static void __touchChannelInit(int pad) {
 static touch_value_t __touchRead(uint8_t pin) {
   int8_t pad = digitalPinToTouchChannel(pin);
   if (pad < 0) {
-    log_e(" No touch pad on selected pin!");
     return 0;
   }
 
@@ -360,7 +359,6 @@ static touch_value_t __touchRead(uint8_t pin) {
 static void __touchConfigInterrupt(uint8_t pin, void (*userFunc)(void), void *Args, bool callWithArgs, touch_value_t threshold) {
   int8_t pad = digitalPinToTouchChannel(pin);
   if (pad < 0) {
-    log_e(" No touch pad on selected pin!");
     return;
   }
 
@@ -446,7 +444,6 @@ bool touchInterruptGetLastStatus(uint8_t pin) {
 void touchSleepWakeUpEnable(uint8_t pin, touch_value_t threshold) {
   int8_t pad = digitalPinToTouchChannel(pin);
   if (pad < 0) {
-    log_e(" No touch pad on selected pin!");
     return;
   }
 

cores/esp32/esp32-hal-touch.c

@@ -206,7 +206,6 @@ static void __touchChannelInit(int pad) {
 static touch_value_t __touchRead(uint8_t pin) {
   int8_t pad = digitalPinToTouchChannel(pin);
   if (pad < 0) {
-    log_e(" No touch pad on selected pin!");
     return 0;
   }
 
@@ -233,7 +232,6 @@ static touch_value_t __touchRead(uint8_t pin) {
 static void __touchConfigInterrupt(uint8_t pin, void (*userFunc)(void), void *Args, touch_value_t threshold, bool callWithArgs) {
   int8_t pad = digitalPinToTouchChannel(pin);
   if (pad < 0) {
-    log_e(" No touch pad on selected pin!");
     return;
   }
 
@@ -295,7 +293,6 @@ bool touchInterruptGetLastStatus(uint8_t pin) {
 void touchSleepWakeUpEnable(uint8_t pin, touch_value_t threshold) {
   int8_t pad = digitalPinToTouchChannel(pin);
   if (pad < 0) {
-    log_e(" No touch pad on selected pin!");
     return;
   }