diff --git a/arch/risc-v/src/common/espressif/esp_rmt.c b/arch/risc-v/src/common/espressif/esp_rmt.c
index 45e603d8efc..2502c5d9e8c 100644
--- a/arch/risc-v/src/common/espressif/esp_rmt.c
+++ b/arch/risc-v/src/common/espressif/esp_rmt.c
@@ -222,7 +222,7 @@ struct rmt_dev_common_s
 
 struct rmt_dev_lowerhalf_s
 {
-  /* The following block is part of the upper-hald device struct */
+  /* The following block is part of the upper-half device struct */
 
   FAR const struct rmt_ops_s *ops;
   FAR struct circbuf_s       *circbuf;
@@ -241,18 +241,18 @@ struct rmt_obj_s
   size_t tx_len_rem;
   size_t tx_sub_len;
   bool wait_done;     /* Mark whether wait tx done */
-  bool loop_autostop; /* mark whether loop auto-stop is enabled */
+  bool loop_autostop; /* Mark whether loop auto-stop is enabled */
   rmt_channel_t channel;
   const rmt_item32_t *tx_data;
   sem_t tx_sem;
-#if CONFIG_SPIRAM_USE_MALLOC
+#ifdef CONFIG_SPIRAM_USE_MALLOC
   int intr_alloc_flags;
   sem_t tx_sem_buffer;
 #endif
   rmt_item32_t *tx_buf;
   struct circbuf_s rx_buf;
   sem_t rx_sem;
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   rmt_item32_t *rx_item_buf;
   uint32_t rx_item_buf_size;
   uint32_t rx_item_len;
@@ -433,7 +433,7 @@ static void rmt_module_enable(void)
  *
  ****************************************************************************/
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
 static int rmt_set_rx_thr_intr_en(rmt_channel_t channel, bool en,
                                   uint16_t evt_thresh)
 {
@@ -496,7 +496,7 @@ static int rmt_rx_start(rmt_channel_t channel, bool rx_idx_rst)
 {
   irqstate_t flags;
   rmt_channel_t ch = RMT_DECODE_RX_CHANNEL(channel);
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   const uint32_t item_block_len =
     rmt_ll_rx_get_mem_blocks(g_rmtdev_common.hal.regs, ch) *
     RMT_MEM_ITEM_NUM;
@@ -517,7 +517,7 @@ static int rmt_rx_start(rmt_channel_t channel, bool rx_idx_rst)
   rmt_ll_enable_interrupt(g_rmtdev_common.hal.regs,
                           RMT_LL_EVENT_RX_DONE(ch), true);
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   p_rmt_obj[channel]->rx_item_start_idx = 0;
   p_rmt_obj[channel]->rx_item_len = 0;
   rmt_set_rx_thr_intr_en(channel, true, item_block_len / 2);
@@ -560,7 +560,7 @@ static int rmt_tx_start(rmt_channel_t channel, bool tx_idx_rst)
   rmt_ll_clear_interrupt_status(g_rmtdev_common.hal.regs,
                                 RMT_LL_EVENT_TX_DONE(channel));
 
-  /* enable tx end interrupt in non-loop mode */
+  /* Enable tx end interrupt in non-loop mode */
 
   if (!rmt_ll_tx_is_loop_enabled(g_rmtdev_common.hal.regs, channel))
     {
@@ -938,7 +938,7 @@ static int rmt_internal_config(rmt_dev_t *dev,
       rmt_ll_rx_enable_filter(dev, RMT_DECODE_RX_CHANNEL(channel),
                               rmt_param->rx_config.filter_en);
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
 
       /* always enable rx ping-pong */
 
@@ -1232,7 +1232,7 @@ static int IRAM_ATTR rmt_driver_isr_default(int irq, void *context,
 
               addr = (rmt_item32_t *)
                 RMTMEM.chan[RMT_ENCODE_RX_CHANNEL(channel)].data32;
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
               if (item_len > p_rmt->rx_item_start_idx)
                 {
                   item_len = item_len - p_rmt->rx_item_start_idx;
@@ -1272,7 +1272,7 @@ static int IRAM_ATTR rmt_driver_isr_default(int irq, void *context,
               rmterr("RMT RX BUFFER ERROR");
             }
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
           p_rmt->rx_item_start_idx = 0;
           p_rmt->rx_item_len = 0;
           memset((void *)p_rmt->rx_item_buf, 0, p_rmt->rx_item_buf_size);
@@ -1287,7 +1287,7 @@ static int IRAM_ATTR rmt_driver_isr_default(int irq, void *context,
                                     RMT_LL_EVENT_RX_DONE(channel));
     }
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
 
   /* Rx thres interrupt */
 
@@ -1463,8 +1463,8 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
     }
 #endif
 
-#if !CONFIG_SPIRAM_USE_MALLOC
-  p_rmt_obj[channel] = calloc(1, sizeof(rmt_obj_t));
+#ifndef CONFIG_SPIRAM_USE_MALLOC
+  p_rmt_obj[channel] = kmm_calloc(1, sizeof(rmt_obj_t));
 #else
   if (!(intr_alloc_flags & ESP_INTR_FLAG_IRAM))
     {
@@ -1472,9 +1472,7 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
     }
   else
     {
-      p_rmt_obj[channel] = heap_caps_calloc(1, sizeof(rmt_obj_t),
-                                            MALLOC_CAP_INTERNAL | \
-                                            MALLOC_CAP_8BIT);
+      p_rmt_obj[channel] = kmm_calloc(1, sizeof(rmt_obj_t));
     }
 #endif
 
@@ -1492,7 +1490,7 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
   p_rmt_obj[channel]->wait_done = false;
   p_rmt_obj[channel]->loop_autostop = false;
 
-#if !CONFIG_SPIRAM_USE_MALLOC
+#ifndef CONFIG_SPIRAM_USE_MALLOC
   nxsem_init(&p_rmt_obj[channel]->tx_sem, 0, 0);
   nxsem_init(&p_rmt_obj[channel]->rx_sem, 0, 0);
 #endif
@@ -1504,24 +1502,22 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
       circbuf_init(&p_rmt_obj[channel]->rx_buf, NULL, rx_buf_size);
     }
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   if (p_rmt_obj[channel]->rx_item_buf == NULL && rx_buf_size > 0)
     {
-#if !CONFIG_SPIRAM_USE_MALLOC
-      p_rmt_obj[channel]->rx_item_buf = calloc(1, rx_buf_size);
-#else
+#  ifndef CONFIG_SPIRAM_USE_MALLOC
+      p_rmt_obj[channel]->rx_item_buf = kmm_calloc(1, rx_buf_size);
+#  else
       if (!(p_rmt_obj[channel]->intr_alloc_flags & ESP_INTR_FLAG_IRAM))
         {
           p_rmt_obj[channel]->rx_item_buf = calloc(1, rx_buf_size);
         }
       else
         {
-          p_rmt_obj[channel]->rx_item_buf =
-              heap_caps_calloc(1, rx_buf_size,
-                               MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
+          p_rmt_obj[channel]->rx_item_buf = kmm_calloc(1, rx_buf_size);
         }
 
-#endif
+#  endif
       if (p_rmt_obj[channel]->rx_item_buf == NULL)
         {
           rmterr("RMT malloc fail");
@@ -1605,12 +1601,12 @@ static int rmt_write_items(rmt_channel_t channel,
                                                  channel);
 
   DEBUGASSERT(mem_blocks + channel <= SOC_RMT_CHANNELS_PER_GROUP);
-#if CONFIG_SPIRAM_USE_MALLOC
+#ifdef CONFIG_SPIRAM_USE_MALLOC
   if (p_rmt_obj[channel]->intr_alloc_flags & ESP_INTR_FLAG_IRAM)
     {
       if (!esp_ptr_internal(rmt_item))
         {
-          remterr(RMT_PSRAM_BUFFER_WARN_STR);
+          rmterr(RMT_PSRAM_BUFFER_WARN_STR);
           return ESP_ERR_INVALID_ARG;
         }
     }
@@ -1904,7 +1900,7 @@ static struct rmt_dev_s
  *   Initialize the selected RMT device in TX mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the TX channel
  *
  * Returned Value:
@@ -1926,7 +1922,7 @@ struct rmt_dev_s *esp_rmt_tx_init(int ch, int pin)
  *   Initialize the selected RMT device in RC mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the RX channel
  *
  * Returned Value:
diff --git a/arch/risc-v/src/common/espressif/esp_rmt.h b/arch/risc-v/src/common/espressif/esp_rmt.h
index 606f34e2ab5..84bec403e9c 100644
--- a/arch/risc-v/src/common/espressif/esp_rmt.h
+++ b/arch/risc-v/src/common/espressif/esp_rmt.h
@@ -72,7 +72,7 @@ extern "C"
  *   Initialize the selected RMT device in TX mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the TX channel
  *
  * Returned Value:
@@ -89,7 +89,7 @@ struct rmt_dev_s *esp_rmt_tx_init(int ch, int pin);
  *   Initialize the selected RMT device in RC mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the RX channel
  *
  * Returned Value:
diff --git a/arch/risc-v/src/common/espressif/esp_ws2812.c b/arch/risc-v/src/common/espressif/esp_ws2812.c
index a3726d5f950..cc4e14865a4 100644
--- a/arch/risc-v/src/common/espressif/esp_ws2812.c
+++ b/arch/risc-v/src/common/espressif/esp_ws2812.c
@@ -126,9 +126,9 @@ extern uint32_t g_rmt_source_clock_hz;
  *
  * Description:
  *   Maps a byte to a sequence of RMT items. Each bit in the byte is
- *   represented by an RMT item (32-bit value). Iterates over each bit in
- *   the byte, creating an RMT item for each bit, set or not. The created
- *   RMT items are stored in the destination array.
+ *   represented by an RMT item (32-bit value). The function iterates over
+ *   each bit in the byte, creating an RMT item for each bit, HIGH or LOW.
+ *   The created RMT items are stored in the destination array.
  *
  * Input Parameters:
  *   dev  - Pointer to the RMT-based WS2812 device structure.
diff --git a/arch/xtensa/src/common/espressif/Kconfig b/arch/xtensa/src/common/espressif/Kconfig
index 6bc8c13f71a..c6cfce8c7ff 100644
--- a/arch/xtensa/src/common/espressif/Kconfig
+++ b/arch/xtensa/src/common/espressif/Kconfig
@@ -3,5 +3,7 @@ config ESP_RMT
 	default n
 	depends on RMT
 	---help---
-		Remote Control Module is currently used to control WS2812
-		RGB LED normally used on LED strips.
\ No newline at end of file
+		The RMT (Remote Control Transceiver) peripheral was designed to act as
+		an infrared transceiver. However, due to the flexibility of its data
+		format, RMT can be extended to a versatile and general-purpose
+		transceiver, transmitting or receiving many other types of signals.
diff --git a/arch/xtensa/src/common/espressif/esp_rmt.c b/arch/xtensa/src/common/espressif/esp_rmt.c
index 6f66a9a2308..2b15c313c20 100644
--- a/arch/xtensa/src/common/espressif/esp_rmt.c
+++ b/arch/xtensa/src/common/espressif/esp_rmt.c
@@ -268,7 +268,7 @@ struct rmt_dev_common_s
 
 struct rmt_dev_lowerhalf_s
 {
-  /* The following block is part of the upper-hald device struct */
+  /* The following block is part of the upper-half device struct */
 
   FAR const struct rmt_ops_s *ops;
   FAR struct circbuf_s       *circbuf;
@@ -287,18 +287,18 @@ struct rmt_obj_s
   size_t tx_len_rem;
   size_t tx_sub_len;
   bool wait_done;     /* Mark whether wait tx done */
-  bool loop_autostop; /* mark whether loop auto-stop is enabled */
+  bool loop_autostop; /* Mark whether loop auto-stop is enabled */
   rmt_channel_t channel;
   const rmt_item32_t *tx_data;
   sem_t tx_sem;
-#if CONFIG_SPIRAM_USE_MALLOC
+#ifdef CONFIG_SPIRAM_USE_MALLOC
   int intr_alloc_flags;
   sem_t tx_sem_buffer;
 #endif
   rmt_item32_t *tx_buf;
   struct circbuf_s rx_buf;
   sem_t rx_sem;
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   rmt_item32_t *rx_item_buf;
   uint32_t rx_item_buf_size;
   uint32_t rx_item_len;
@@ -479,7 +479,7 @@ static void rmt_module_enable(void)
  *
  ****************************************************************************/
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
 static int rmt_set_rx_thr_intr_en(rmt_channel_t channel, bool en,
                                   uint16_t evt_thresh)
 {
@@ -543,7 +543,7 @@ static int rmt_rx_start(rmt_channel_t channel, bool rx_idx_rst)
 {
   irqstate_t flags;
   rmt_channel_t ch = RMT_DECODE_RX_CHANNEL(channel);
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   const uint32_t item_block_len =
     rmt_ll_rx_get_mem_blocks(g_rmtdev_common.hal.regs, ch) *
     RMT_MEM_ITEM_NUM;
@@ -564,7 +564,7 @@ static int rmt_rx_start(rmt_channel_t channel, bool rx_idx_rst)
   rmt_ll_enable_interrupt(g_rmtdev_common.hal.regs,
                           RMT_LL_EVENT_RX_DONE(ch), true);
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   p_rmt_obj[channel]->rx_item_start_idx = 0;
   p_rmt_obj[channel]->rx_item_len = 0;
   rmt_set_rx_thr_intr_en(channel, true, item_block_len / 2);
@@ -607,7 +607,7 @@ static int rmt_tx_start(rmt_channel_t channel, bool tx_idx_rst)
   rmt_ll_clear_interrupt_status(g_rmtdev_common.hal.regs,
                                 RMT_LL_EVENT_TX_DONE(channel));
 
-  /* enable tx end interrupt in non-loop mode */
+  /* Enable tx end interrupt in non-loop mode */
 
   if (!rmt_ll_tx_is_loop_enabled(g_rmtdev_common.hal.regs, channel))
     {
@@ -985,7 +985,7 @@ static int rmt_internal_config(rmt_dev_t *dev,
       rmt_ll_rx_enable_filter(dev, RMT_DECODE_RX_CHANNEL(channel),
                               rmt_param->rx_config.filter_en);
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
 
       /* always enable rx ping-pong */
 
@@ -1283,7 +1283,7 @@ static int IRAM_ATTR rmt_driver_isr_default(int irq, void *context,
 
               addr = (rmt_item32_t *)
                 RMTMEM.chan[RMT_ENCODE_RX_CHANNEL(channel)].data32;
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
               if (item_len > p_rmt->rx_item_start_idx)
                 {
                   item_len = item_len - p_rmt->rx_item_start_idx;
@@ -1323,7 +1323,7 @@ static int IRAM_ATTR rmt_driver_isr_default(int irq, void *context,
               rmterr("RMT RX BUFFER ERROR");
             }
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
           p_rmt->rx_item_start_idx = 0;
           p_rmt->rx_item_len = 0;
           memset((void *)p_rmt->rx_item_buf, 0, p_rmt->rx_item_buf_size);
@@ -1338,7 +1338,7 @@ static int IRAM_ATTR rmt_driver_isr_default(int irq, void *context,
                                     RMT_LL_EVENT_RX_DONE(channel));
     }
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
 
   /* Rx thres interrupt */
 
@@ -1514,8 +1514,8 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
     }
 #endif
 
-#if !CONFIG_SPIRAM_USE_MALLOC
-  p_rmt_obj[channel] = calloc(1, sizeof(rmt_obj_t));
+#ifndef CONFIG_SPIRAM_USE_MALLOC
+  p_rmt_obj[channel] = kmm_calloc(1, sizeof(rmt_obj_t));
 #else
   if (!(intr_alloc_flags & ESP_INTR_FLAG_IRAM))
     {
@@ -1523,9 +1523,7 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
     }
   else
     {
-      p_rmt_obj[channel] = heap_caps_calloc(1, sizeof(rmt_obj_t),
-                                            MALLOC_CAP_INTERNAL | \
-                                            MALLOC_CAP_8BIT);
+      p_rmt_obj[channel] = kmm_calloc(1, sizeof(rmt_obj_t));
     }
 #endif
 
@@ -1543,7 +1541,7 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
   p_rmt_obj[channel]->wait_done = false;
   p_rmt_obj[channel]->loop_autostop = false;
 
-#if !CONFIG_SPIRAM_USE_MALLOC
+#ifndef CONFIG_SPIRAM_USE_MALLOC
   nxsem_init(&p_rmt_obj[channel]->tx_sem, 0, 0);
   nxsem_init(&p_rmt_obj[channel]->rx_sem, 0, 0);
 #endif
@@ -1555,24 +1553,22 @@ static int rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size,
       circbuf_init(&p_rmt_obj[channel]->rx_buf, NULL, rx_buf_size);
     }
 
-#if SOC_RMT_SUPPORT_RX_PINGPONG
+#ifdef SOC_RMT_SUPPORT_RX_PINGPONG
   if (p_rmt_obj[channel]->rx_item_buf == NULL && rx_buf_size > 0)
     {
-#if !CONFIG_SPIRAM_USE_MALLOC
-      p_rmt_obj[channel]->rx_item_buf = calloc(1, rx_buf_size);
-#else
+#  ifndef CONFIG_SPIRAM_USE_MALLOC
+      p_rmt_obj[channel]->rx_item_buf = kmm_calloc(1, rx_buf_size);
+#  else
       if (!(p_rmt_obj[channel]->intr_alloc_flags & ESP_INTR_FLAG_IRAM))
         {
           p_rmt_obj[channel]->rx_item_buf = calloc(1, rx_buf_size);
         }
       else
         {
-          p_rmt_obj[channel]->rx_item_buf =
-              heap_caps_calloc(1, rx_buf_size,
-                               MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
+          p_rmt_obj[channel]->rx_item_buf = kmm_calloc(1, rx_buf_size);
         }
 
-#endif
+#  endif
       if (p_rmt_obj[channel]->rx_item_buf == NULL)
         {
           rmterr("RMT malloc fail");
@@ -1656,12 +1652,12 @@ static int rmt_write_items(rmt_channel_t channel,
                                                  channel);
 
   DEBUGASSERT(mem_blocks + channel <= SOC_RMT_CHANNELS_PER_GROUP);
-#if CONFIG_SPIRAM_USE_MALLOC
+#ifdef CONFIG_SPIRAM_USE_MALLOC
   if (p_rmt_obj[channel]->intr_alloc_flags & ESP_INTR_FLAG_IRAM)
     {
       if (!esp_ptr_internal(rmt_item))
         {
-          remterr(RMT_PSRAM_BUFFER_WARN_STR);
+          rmterr(RMT_PSRAM_BUFFER_WARN_STR);
           return ESP_ERR_INVALID_ARG;
         }
     }
@@ -1955,7 +1951,7 @@ static struct rmt_dev_s
  *   Initialize the selected RMT device in TX mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the TX channel
  *
  * Returned Value:
@@ -1977,7 +1973,7 @@ struct rmt_dev_s *esp_rmt_tx_init(int ch, int pin)
  *   Initialize the selected RMT device in RC mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the RX channel
  *
  * Returned Value:
diff --git a/arch/xtensa/src/common/espressif/esp_rmt.h b/arch/xtensa/src/common/espressif/esp_rmt.h
index 336725bf3f3..b1b1d03f8a4 100644
--- a/arch/xtensa/src/common/espressif/esp_rmt.h
+++ b/arch/xtensa/src/common/espressif/esp_rmt.h
@@ -72,7 +72,7 @@ extern "C"
  *   Initialize the selected RMT device in TX mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the TX channel
  *
  * Returned Value:
@@ -89,7 +89,7 @@ struct rmt_dev_s *esp_rmt_tx_init(int ch, int pin);
  *   Initialize the selected RMT device in RC mode
  *
  * Input Parameters:
- *   ch   - the RMT's channel that will be used
+ *   ch   - The RMT's channel that will be used
  *   pin  - The pin used for the RX channel
  *
  * Returned Value:
diff --git a/arch/xtensa/src/common/espressif/esp_ws2812.c b/arch/xtensa/src/common/espressif/esp_ws2812.c
index f6e6ee075ca..1baf01fa62d 100644
--- a/arch/xtensa/src/common/espressif/esp_ws2812.c
+++ b/arch/xtensa/src/common/espressif/esp_ws2812.c
@@ -126,9 +126,9 @@ extern uint32_t g_rmt_source_clock_hz;
  *
  * Description:
  *   Maps a byte to a sequence of RMT items. Each bit in the byte is
- *   represented by an RMT item (32-bit value). Iterates over each bit in
- *   the byte, creating an RMT item for each bit, set or not. The created
- *   RMT items are stored in the destination array.
+ *   represented by an RMT item (32-bit value). The function iterates over
+ *   each bit in the byte, creating an RMT item for each bit, HIGH or LOW.
+ *   The created RMT items are stored in the destination array.
  *
  * Input Parameters:
  *   dev  - Pointer to the RMT-based WS2812 device structure.
diff --git a/arch/xtensa/src/common/espressif/esp_ws2812.h b/arch/xtensa/src/common/espressif/esp_ws2812.h
index e81c7a6f4ab..3da5d58f36a 100644
--- a/arch/xtensa/src/common/espressif/esp_ws2812.h
+++ b/arch/xtensa/src/common/espressif/esp_ws2812.h
@@ -65,9 +65,9 @@ extern "C"
  ****************************************************************************/
 
 struct ws2812_dev_s *esp_ws2812_setup(const char *path,
-                                        struct rmt_dev_s *rmt,
-                                        uint16_t    pixel_count,
-                                        bool        has_white);
+                                      struct rmt_dev_s *rmt,
+                                      uint16_t    pixel_count,
+                                      bool        has_white);
 
 /****************************************************************************
  * Name: esp_ws2812_release
diff --git a/boards/risc-v/esp32c3/common/include/esp_board_rmt.h b/boards/risc-v/esp32c3/common/include/esp_board_rmt.h
index 03ce6bb942d..74fd115341c 100644
--- a/boards/risc-v/esp32c3/common/include/esp_board_rmt.h
+++ b/boards/risc-v/esp32c3/common/include/esp_board_rmt.h
@@ -56,10 +56,10 @@ extern "C"
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -73,10 +73,10 @@ int board_rmt_rxinitialize(int ch, int pin);
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/risc-v/esp32c3/common/src/esp_board_rmt.c b/boards/risc-v/esp32c3/common/src/esp_board_rmt.c
index 528d70581e5..0d15d2e77cf 100644
--- a/boards/risc-v/esp32c3/common/src/esp_board_rmt.c
+++ b/boards/risc-v/esp32c3/common/src/esp_board_rmt.c
@@ -72,10 +72,10 @@
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -103,10 +103,10 @@ int board_rmt_rxinitialize(int ch, int pin)
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/risc-v/esp32c6/common/include/esp_board_rmt.h b/boards/risc-v/esp32c6/common/include/esp_board_rmt.h
index cbb3f56f5c4..eae34fa6711 100644
--- a/boards/risc-v/esp32c6/common/include/esp_board_rmt.h
+++ b/boards/risc-v/esp32c6/common/include/esp_board_rmt.h
@@ -56,10 +56,10 @@ extern "C"
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -73,10 +73,10 @@ int board_rmt_rxinitialize(int ch, int pin);
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/risc-v/esp32c6/common/src/esp_board_rmt.c b/boards/risc-v/esp32c6/common/src/esp_board_rmt.c
index d73ebcd23ad..9c3eefd321e 100644
--- a/boards/risc-v/esp32c6/common/src/esp_board_rmt.c
+++ b/boards/risc-v/esp32c6/common/src/esp_board_rmt.c
@@ -72,10 +72,10 @@
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -103,10 +103,10 @@ int board_rmt_rxinitialize(int ch, int pin)
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/risc-v/esp32h2/common/include/esp_board_rmt.h b/boards/risc-v/esp32h2/common/include/esp_board_rmt.h
index 4106b0d5d36..0e713aaee0f 100644
--- a/boards/risc-v/esp32h2/common/include/esp_board_rmt.h
+++ b/boards/risc-v/esp32h2/common/include/esp_board_rmt.h
@@ -56,10 +56,10 @@ extern "C"
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -73,10 +73,10 @@ int board_rmt_rxinitialize(int ch, int pin);
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/risc-v/esp32h2/common/src/esp_board_rmt.c b/boards/risc-v/esp32h2/common/src/esp_board_rmt.c
index 39484443363..2b7d2f9fb4f 100644
--- a/boards/risc-v/esp32h2/common/src/esp_board_rmt.c
+++ b/boards/risc-v/esp32h2/common/src/esp_board_rmt.c
@@ -72,10 +72,10 @@
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -103,10 +103,10 @@ int board_rmt_rxinitialize(int ch, int pin)
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/xtensa/esp32/common/include/esp32_board_rmt.h b/boards/xtensa/esp32/common/include/esp32_board_rmt.h
index afb7cdb0f95..0d218892f7e 100644
--- a/boards/xtensa/esp32/common/include/esp32_board_rmt.h
+++ b/boards/xtensa/esp32/common/include/esp32_board_rmt.h
@@ -56,10 +56,10 @@ extern "C"
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -73,10 +73,10 @@ int board_rmt_rxinitialize(int ch, int pin);
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/xtensa/esp32/common/src/esp32_board_rmt.c b/boards/xtensa/esp32/common/src/esp32_board_rmt.c
index cf78ae127e2..993ec87361e 100644
--- a/boards/xtensa/esp32/common/src/esp32_board_rmt.c
+++ b/boards/xtensa/esp32/common/src/esp32_board_rmt.c
@@ -74,10 +74,10 @@
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -105,10 +105,10 @@ int board_rmt_rxinitialize(int ch, int pin)
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
@@ -141,7 +141,7 @@ int board_rmt_txinitialize(int ch, int pin)
 
 #ifdef CONFIG_WS2812_NON_SPI_DRIVER
   led = esp_ws2812_setup("/dev/leds0", rmt,
-                           CONFIG_WS2812_LED_COUNT, false);
+                         CONFIG_WS2812_LED_COUNT, false);
 
   if (led == NULL)
     {
diff --git a/boards/xtensa/esp32s2/common/include/esp32s2_board_rmt.h b/boards/xtensa/esp32s2/common/include/esp32s2_board_rmt.h
index 1b4026f6485..6682746c968 100644
--- a/boards/xtensa/esp32s2/common/include/esp32s2_board_rmt.h
+++ b/boards/xtensa/esp32s2/common/include/esp32s2_board_rmt.h
@@ -56,10 +56,10 @@ extern "C"
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -73,10 +73,10 @@ int board_rmt_rxinitialize(int ch, int pin);
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/xtensa/esp32s2/common/src/esp32s2_board_rmt.c b/boards/xtensa/esp32s2/common/src/esp32s2_board_rmt.c
index 2cdd10164be..243c710db6d 100644
--- a/boards/xtensa/esp32s2/common/src/esp32s2_board_rmt.c
+++ b/boards/xtensa/esp32s2/common/src/esp32s2_board_rmt.c
@@ -74,10 +74,10 @@
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -105,10 +105,10 @@ int board_rmt_rxinitialize(int ch, int pin)
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/xtensa/esp32s3/common/include/esp32s3_board_rmt.h b/boards/xtensa/esp32s3/common/include/esp32s3_board_rmt.h
index 2acdc337688..0b9fbb618a7 100644
--- a/boards/xtensa/esp32s3/common/include/esp32s3_board_rmt.h
+++ b/boards/xtensa/esp32s3/common/include/esp32s3_board_rmt.h
@@ -56,10 +56,10 @@ extern "C"
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -73,10 +73,10 @@ int board_rmt_rxinitialize(int ch, int pin);
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value:
diff --git a/boards/xtensa/esp32s3/common/src/esp32s3_board_rmt.c b/boards/xtensa/esp32s3/common/src/esp32s3_board_rmt.c
index a3d178105ea..f42d2b33acd 100644
--- a/boards/xtensa/esp32s3/common/src/esp32s3_board_rmt.c
+++ b/boards/xtensa/esp32s3/common/src/esp32s3_board_rmt.c
@@ -74,10 +74,10 @@
  * Name: board_rmt_rxinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a RX device.
+ *   Initialize the RMT peripheral and register an RX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the RX channel
  *
  * Returned Value:
@@ -105,10 +105,10 @@ int board_rmt_rxinitialize(int ch, int pin)
  * Name: board_rmt_txinitialize
  *
  * Description:
- *   Initialize the RMT peripheral and register a TX device.
+ *   Initialize the RMT peripheral and register an TX device.
  *
  * Input Parameters:
- *   ch  - the RMT's channel that will be used
+ *   ch  - The RMT's channel that will be used
  *   pin - The pin used for the TX channel
  *
  * Returned Value: