diff --git a/components/soc/esp32/emac_hal.c b/components/soc/esp32/emac_hal.c
index 08f123e9e8..eff683ab8e 100644
--- a/components/soc/esp32/emac_hal.c
+++ b/components/soc/esp32/emac_hal.c
@@ -457,7 +457,7 @@ uint32_t emac_hal_transmit_frame(emac_hal_context_t *hal, uint8_t *buf, uint32_t
 
     eth_dma_tx_descriptor_t *desc_iter = hal->tx_desc;
     /* A frame is transmitted in multiple descriptor */
-    for (int i = 0; i < bufcount; i++) {
+    for (uint32_t i = 0; i < bufcount; i++) {
         /* Check if the descriptor is owned by the Ethernet DMA (when 1) or CPU (when 0) */
         if (desc_iter->TDES0.Own != EMAC_DMADESC_OWNER_CPU) {
             goto err;
@@ -492,7 +492,7 @@ uint32_t emac_hal_transmit_frame(emac_hal_context_t *hal, uint8_t *buf, uint32_t
     }
 
     /* Set Own bit of the Tx descriptor Status: gives the buffer back to ETHERNET DMA */
-    for (int i = 0; i < bufcount; i++) {
+    for (uint32_t i = 0; i < bufcount; i++) {
         hal->tx_desc->TDES0.Own = EMAC_DMADESC_OWNER_DMA;
         hal->tx_desc = (eth_dma_tx_descriptor_t *)(hal->tx_desc->Buffer2NextDescAddr);
     }
diff --git a/components/soc/esp32/include/hal/spi_flash_ll.h b/components/soc/esp32/include/hal/spi_flash_ll.h
index a242450bd4..814dc3817e 100644
--- a/components/soc/esp32/include/hal/spi_flash_ll.h
+++ b/components/soc/esp32/include/hal/spi_flash_ll.h
@@ -141,7 +141,7 @@ static inline void spi_flash_ll_get_buffer_data(spi_dev_t *dev, void *buffer, ui
     } else {
         // Otherwise, slow(er) path copies word by word
         int copy_len = read_len;
-        for (int i = 0; i < (read_len + 3) / 4; i++) {
+        for (uint32_t i = 0; i < (read_len + 3) / 4; i++) {
             int word_len = MIN(sizeof(uint32_t), copy_len);
             uint32_t word = dev->data_buf[i];
             memcpy(buffer, &word, word_len);
diff --git a/components/soc/esp32/include/hal/spi_ll.h b/components/soc/esp32/include/hal/spi_ll.h
index 836b049182..a884308589 100644
--- a/components/soc/esp32/include/hal/spi_ll.h
+++ b/components/soc/esp32/include/hal/spi_ll.h
@@ -165,7 +165,7 @@ static inline void spi_ll_txdma_start(spi_dev_t *hw, lldesc_t *addr)
  */
 static inline void spi_ll_write_buffer(spi_dev_t *hw, const uint8_t *buffer_to_send, size_t bitlen)
 {
-    for (int x = 0; x < bitlen; x += 32) {
+    for (size_t x = 0; x < bitlen; x += 32) {
         //Use memcpy to get around alignment issues for txdata
         uint32_t word;
         memcpy(&word, &buffer_to_send[x / 8], 4);
@@ -182,7 +182,7 @@ static inline void spi_ll_write_buffer(spi_dev_t *hw, const uint8_t *buffer_to_s
  */
 static inline void spi_ll_read_buffer(spi_dev_t *hw, uint8_t *buffer_to_rcv, size_t bitlen)
 {
-    for (int x = 0; x < bitlen; x += 32) {
+    for (size_t x = 0; x < bitlen; x += 32) {
         //Do a memcpy to get around possible alignment issues in rx_buffer
         uint32_t word = hw->data_buf[x / 32];
         int len = bitlen - x;
diff --git a/components/soc/esp32/include/hal/uart_ll.h b/components/soc/esp32/include/hal/uart_ll.h
index 45248f6934..1b70503527 100644
--- a/components/soc/esp32/include/hal/uart_ll.h
+++ b/components/soc/esp32/include/hal/uart_ll.h
@@ -165,7 +165,7 @@ FORCE_INLINE_ATTR void uart_ll_read_rxfifo(uart_dev_t *hw, uint8_t *buf, uint32_
 {
     //Get the UART APB fifo addr. Read fifo, we use APB address
     uint32_t fifo_addr = (hw == &UART0) ? UART_FIFO_REG(0) : (hw == &UART1) ? UART_FIFO_REG(1) : UART_FIFO_REG(2);
-    for(int i = 0; i < rd_len; i++) {
+    for(uint32_t i = 0; i < rd_len; i++) {
         buf[i] = READ_PERI_REG(fifo_addr);
     }
 }
@@ -183,7 +183,7 @@ FORCE_INLINE_ATTR void uart_ll_write_txfifo(uart_dev_t *hw, const uint8_t *buf,
 {
     //Get the UART AHB fifo addr, Write fifo, we use AHB address
     uint32_t fifo_addr = (hw == &UART0) ? UART_FIFO_AHB_REG(0) : (hw == &UART1) ? UART_FIFO_AHB_REG(1) : UART_FIFO_AHB_REG(2);
-    for(int i = 0; i < wr_len; i++) {
+    for(uint32_t i = 0; i < wr_len; i++) {
         WRITE_PERI_REG(fifo_addr, buf[i]);
     }
 }
diff --git a/components/soc/esp32/include/soc/cpu.h b/components/soc/esp32/include/soc/cpu.h
index 5e1eca273e..6a66815df9 100644
--- a/components/soc/esp32/include/soc/cpu.h
+++ b/components/soc/esp32/include/soc/cpu.h
@@ -74,7 +74,7 @@ static inline void cpu_init_memctl(void)
 static inline void cpu_configure_region_protection(void)
 {
     const uint32_t pages_to_protect[] = {0x00000000, 0x80000000, 0xa0000000, 0xc0000000, 0xe0000000};
-    for (int i = 0; i < sizeof(pages_to_protect)/sizeof(pages_to_protect[0]); ++i) {
+    for (size_t i = 0; i < sizeof(pages_to_protect)/sizeof(pages_to_protect[0]); ++i) {
         cpu_write_dtlb(pages_to_protect[i], 0xf);
         cpu_write_itlb(pages_to_protect[i], 0xf);
     }
diff --git a/components/soc/esp32/rtc_clk.c b/components/soc/esp32/rtc_clk.c
index e0c74ec722..6e8c6653ab 100644
--- a/components/soc/esp32/rtc_clk.c
+++ b/components/soc/esp32/rtc_clk.c
@@ -106,7 +106,7 @@ static void rtc_clk_bbpll_enable(void);
 static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz);
 
 // Current PLL frequency, in MHZ (320 or 480). Zero if PLL is not enabled.
-static int s_cur_pll_freq;
+static size_t s_cur_pll_freq;
 
 static const char* TAG = "rtc_clk";
 
diff --git a/components/soc/src/hal/adc_hal.c b/components/soc/src/hal/adc_hal.c
index 19e91a6a6f..e6f6ea64e7 100644
--- a/components/soc/src/hal/adc_hal.c
+++ b/components/soc/src/hal/adc_hal.c
@@ -36,14 +36,14 @@ void adc_hal_dig_controller_config(const adc_hal_dig_config_t *cfg)
     if (cfg->conv_mode & ADC_CONV_SINGLE_UNIT_1) {
         adc_ll_set_controller(ADC_NUM_1, ADC_CTRL_DIG);
         adc_ll_set_pattern_table_len(ADC_NUM_1, cfg->adc1_pattern_len);
-        for (int i = 0; i < cfg->adc1_pattern_len; i++) {
+        for (uint32_t i = 0; i < cfg->adc1_pattern_len; i++) {
             adc_ll_set_pattern_table(ADC_NUM_1, i, cfg->adc1_pattern[i]);
         }
     }
     if (cfg->conv_mode & ADC_CONV_SINGLE_UNIT_2) {
         adc_ll_set_controller(ADC_NUM_2, ADC_CTRL_DIG);
         adc_ll_set_pattern_table_len(ADC_NUM_2, cfg->adc2_pattern_len);
-        for (int i = 0; i < cfg->adc2_pattern_len; i++) {
+        for (uint32_t i = 0; i < cfg->adc2_pattern_len; i++) {
             adc_ll_set_pattern_table(ADC_NUM_2, i, cfg->adc2_pattern[i]);
         }
     }
diff --git a/components/soc/src/hal/sdio_slave_hal.c b/components/soc/src/hal/sdio_slave_hal.c
index 485fb09df2..331e1d381b 100644
--- a/components/soc/src/hal/sdio_slave_hal.c
+++ b/components/soc/src/hal/sdio_slave_hal.c
@@ -127,7 +127,7 @@ static inline esp_err_t sdio_ringbuf_recv(sdio_ringbuf_t *buf, uint8_t **start,
 static inline int sdio_ringbuf_return(sdio_ringbuf_t* buf, uint8_t *ptr)
 {
     assert(sdio_ringbuf_offset_ptr(buf, RINGBUF_FREE_PTR, SDIO_SLAVE_SEND_DESC_SIZE) == ptr);
-    int size = (buf->read_ptr + buf->size - buf->free_ptr) % buf->size;
+    size_t size = (buf->read_ptr + buf->size - buf->free_ptr) % buf->size;
     int count = size / SDIO_SLAVE_SEND_DESC_SIZE;
     assert(count * SDIO_SLAVE_SEND_DESC_SIZE==size);
     buf->free_ptr = buf->read_ptr;