diff --git a/bdk/display/di.c b/bdk/display/di.c
index 33e0aed..80c4d12 100644
--- a/bdk/display/di.c
+++ b/bdk/display/di.c
@@ -935,7 +935,7 @@ void display_move_framebuffer(u32 window, void *fb)
 	DISPLAY_A(_DIREG(DC_CMD_DISPLAY_WINDOW_HEADER)) = BIT(WINDOW_SELECT + window);
 
 	// Get current framebuffer address.
-	void *fb_curr = (void *)DISPLAY_A(_DIREG(DC_WINBUF_START_ADDR));
+	const void *fb_curr = (void *)DISPLAY_A(_DIREG(DC_WINBUF_START_ADDR));
 	u32 win_size = DISPLAY_A(_DIREG(DC_WIN_PRESCALED_SIZE));
 	win_size = (win_size & 0x7FFF) * ((win_size >> 16) & 0x1FFF);
 
diff --git a/bdk/display/vic.c b/bdk/display/vic.c
index 4611eb4..1044448 100644
--- a/bdk/display/vic.c
+++ b/bdk/display/vic.c
@@ -390,7 +390,7 @@ static int _vic_wait_idle()
 	return 0;
 }
 
-void vic_set_surface(vic_surface_t *sfc)
+void vic_set_surface(const vic_surface_t *sfc)
 {
 	u32 flip_x  = 0;
 	u32 flip_y  = 0;
diff --git a/bdk/display/vic.h b/bdk/display/vic.h
index 54a3007..20fbe6c 100644
--- a/bdk/display/vic.h
+++ b/bdk/display/vic.h
@@ -58,7 +58,7 @@ typedef struct _vic_surface_t
 	u32 rotation;
 } vic_surface_t;
 
-void vic_set_surface(vic_surface_t *sfc);
+void vic_set_surface(const vic_surface_t *sfc);
 int  vic_compose();
 int  vic_init();
 void vic_end();
diff --git a/bdk/mem/minerva.h b/bdk/mem/minerva.h
index de32c78..e78bb41 100644
--- a/bdk/mem/minerva.h
+++ b/bdk/mem/minerva.h
@@ -38,7 +38,7 @@ typedef struct
 	bool emc_2X_clk_src_is_pllmb;
 	bool fsp_for_src_freq;
 	bool train_ram_patterns;
-	bool init_done;
+	u32  init_done;
 } mtc_config_t;
 
 enum train_mode_t
diff --git a/bdk/power/bm92t36.c b/bdk/power/bm92t36.c
index faa1db5..371ed04 100644
--- a/bdk/power/bm92t36.c
+++ b/bdk/power/bm92t36.c
@@ -75,7 +75,7 @@ void bm92t36_get_sink_info(bool *inserted, usb_pd_objects_t *usb_pd)
 	{
 		memset(buf, 0, sizeof(buf));
 		_bm92t36_read_reg(buf, 2, STATUS1_REG);
-		*inserted = buf[0] & STATUS1_INSERT ? true : false;
+		*inserted = (buf[0] & STATUS1_INSERT) ? true : false;
 	}
 
 	if (usb_pd)
diff --git a/bdk/sec/se.c b/bdk/sec/se.c
index b6a2841..e89d13b 100644
--- a/bdk/sec/se.c
+++ b/bdk/sec/se.c
@@ -194,7 +194,7 @@ static int _se_execute_one_block(u32 op, void *dst, u32 dst_size, const void *sr
 	return res;
 }
 
-static void _se_aes_ctr_set(void *ctr)
+static void _se_aes_ctr_set(const void *ctr)
 {
 	u32 data[SE_AES_IV_SIZE / 4];
 	memcpy(data, ctr, SE_AES_IV_SIZE);
@@ -226,7 +226,7 @@ u32 se_key_acc_ctrl_get(u32 ks)
 	return SE(SE_CRYPTO_KEYTABLE_ACCESS_REG + 4 * ks);
 }
 
-void se_aes_key_set(u32 ks, void *key, u32 size)
+void se_aes_key_set(u32 ks, const void *key, u32 size)
 {
 	u32 data[SE_AES_MAX_KEY_SIZE / 4];
 	memcpy(data, key, size);
@@ -238,7 +238,7 @@ void se_aes_key_set(u32 ks, void *key, u32 size)
 	}
 }
 
-void se_aes_iv_set(u32 ks, void *iv)
+void se_aes_iv_set(u32 ks, const void *iv)
 {
 	u32 data[SE_AES_IV_SIZE / 4];
 	memcpy(data, iv, SE_AES_IV_SIZE);
diff --git a/bdk/sec/se.h b/bdk/sec/se.h
index 7c8c38b..36b057b 100644
--- a/bdk/sec/se.h
+++ b/bdk/sec/se.h
@@ -25,8 +25,8 @@ void se_rsa_acc_ctrl(u32 rs, u32 flags);
 void se_key_acc_ctrl(u32 ks, u32 flags);
 u32  se_key_acc_ctrl_get(u32 ks);
 void se_get_aes_keys(u8 *buf, u8 *keys, u32 keysize);
-void se_aes_key_set(u32 ks, void *key, u32 size);
-void se_aes_iv_set(u32 ks, void *iv);
+void se_aes_key_set(u32 ks, const void *key, u32 size);
+void se_aes_iv_set(u32 ks, const void *iv);
 void se_aes_key_get(u32 ks, void *key, u32 size);
 void se_aes_key_clear(u32 ks);
 void se_aes_iv_clear(u32 ks);
diff --git a/bdk/soc/clock.c b/bdk/soc/clock.c
index 6b2870c..b3a48fa 100644
--- a/bdk/soc/clock.c
+++ b/bdk/soc/clock.c
@@ -701,7 +701,7 @@ static void _clock_sdmmc_clear_enable(u32 id)
 
 static void _clock_sdmmc_config_legacy_tm()
 {
-	clk_rst_t *clk = &_clock_sdmmc_legacy_tm;
+	const clk_rst_t *clk = &_clock_sdmmc_legacy_tm;
 	if (!(CLOCK(clk->enable) & BIT(clk->index)))
 		clock_enable(clk);
 }
diff --git a/bdk/soc/clock.h b/bdk/soc/clock.h
index 4bceb24..14d1df7 100644
--- a/bdk/soc/clock.h
+++ b/bdk/soc/clock.h
@@ -150,6 +150,7 @@
 #define CLK_RST_CONTROLLER_PLLC_MISC_2 0x5D0
 #define CLK_RST_CONTROLLER_PLLC4_OUT 0x5E4
 #define CLK_RST_CONTROLLER_PLLMB_BASE 0x5E8
+#define CLK_RST_CONTROLLER_PLLMB_MISC1 0x5EC
 #define CLK_RST_CONTROLLER_CLK_SOURCE_XUSB_FS 0x608
 #define CLK_RST_CONTROLLER_CLK_SOURCE_XUSB_CORE_DEV 0x60C
 #define CLK_RST_CONTROLLER_CLK_SOURCE_XUSB_SS 0x610
diff --git a/bdk/soc/fuse.c b/bdk/soc/fuse.c
index 60e2fe7..e0a6dc8 100644
--- a/bdk/soc/fuse.c
+++ b/bdk/soc/fuse.c
@@ -189,7 +189,7 @@ void fuse_read_array(u32 *words)
 		words[i] = fuse_read(i);
 }
 
-static u32 _parity32_even(u32 *words, u32 count)
+static u32 _parity32_even(const u32 *words, u32 count)
 {
 	u32 acc = words[0];
 	for (u32 i = 1; i < count; i++)
@@ -303,7 +303,7 @@ int fuse_read_ipatch(void (*ipatch)(u32 offset, u32 value))
 	u32 words[80];
 	u32 word_count;
 	u32 word_addr;
-	u32 word0 = 0;
+	u32 word0;
 	u32 total_read = 0;
 
 	word_count = FUSE(FUSE_FIRST_BOOTROM_PATCH_SIZE);
@@ -363,7 +363,7 @@ int fuse_read_evp_thunk(u32 *iram_evp_thunks, u32 *iram_evp_thunks_len)
 	u32 words[80];
 	u32 word_count;
 	u32 word_addr;
-	u32 word0 = 0;
+	u32 word0;
 	u32 total_read = 0;
 	int evp_thunk_written = 0;
 	void *evp_thunk_dst_addr = 0;
diff --git a/bdk/soc/i2c.c b/bdk/soc/i2c.c
index 81f783c..c38e952 100644
--- a/bdk/soc/i2c.c
+++ b/bdk/soc/i2c.c
@@ -96,7 +96,7 @@ static void _i2c_load_cfg_wait(vu32 *base)
 	}
 }
 
-static int _i2c_send_single(u32 i2c_idx, u32 dev_addr, u8 *buf, u32 size)
+static int _i2c_send_single(u32 i2c_idx, u32 dev_addr, const u8 *buf, u32 size)
 {
 	if (size > 8)
 		return 0;
@@ -384,7 +384,7 @@ int i2c_recv_buf_big(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr, u32 reg)
 	return _i2c_recv_pkt(i2c_idx, buf, size, dev_addr, reg);
 }
 
-int i2c_send_buf_small(u32 i2c_idx, u32 dev_addr, u32 reg, u8 *buf, u32 size)
+int i2c_send_buf_small(u32 i2c_idx, u32 dev_addr, u32 reg, const u8 *buf, u32 size)
 {
 	u8 tmp[8];
 
diff --git a/bdk/soc/i2c.h b/bdk/soc/i2c.h
index a04eec1..ab3078e 100644
--- a/bdk/soc/i2c.h
+++ b/bdk/soc/i2c.h
@@ -31,7 +31,7 @@ void i2c_init(u32 i2c_idx);
 int i2c_recv_buf(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr);
 int i2c_send_buf_big(u32 i2c_idx, u32 dev_addr, u8 *buf, u32 size);
 int i2c_recv_buf_big(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr, u32 reg);
-int i2c_send_buf_small(u32 i2c_idx, u32 dev_addr, u32 reg, u8 *buf, u32 size);
+int i2c_send_buf_small(u32 i2c_idx, u32 dev_addr, u32 reg, const u8 *buf, u32 size);
 int i2c_recv_buf_small(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr, u32 reg);
 int i2c_send_byte(u32 i2c_idx, u32 dev_addr, u32 reg, u8 val);
 u8  i2c_recv_byte(u32 i2c_idx, u32 dev_addr, u32 reg);
diff --git a/bdk/storage/sd.c b/bdk/storage/sd.c
index f2a22ed..3ad31fa 100644
--- a/bdk/storage/sd.c
+++ b/bdk/storage/sd.c
@@ -274,7 +274,7 @@ void *sd_file_read(const char *path, u32 *fsize)
 	return buf;
 }
 
-int sd_save_to_file(void *buf, u32 size, const char *filename)
+int sd_save_to_file(const void *buf, u32 size, const char *filename)
 {
 	FIL fp;
 	u32 res = 0;
diff --git a/bdk/storage/sd.h b/bdk/storage/sd.h
index 1008b65..1153996 100644
--- a/bdk/storage/sd.h
+++ b/bdk/storage/sd.h
@@ -61,6 +61,6 @@ void sd_unmount();
 void sd_end();
 bool sd_is_gpt();
 void *sd_file_read(const char *path, u32 *fsize);
-int  sd_save_to_file(void *buf, u32 size, const char *filename);
+int  sd_save_to_file(const void *buf, u32 size, const char *filename);
 
 #endif
\ No newline at end of file
diff --git a/bdk/storage/sdmmc.c b/bdk/storage/sdmmc.c
index 6fcdd5e..6458b44 100644
--- a/bdk/storage/sdmmc.c
+++ b/bdk/storage/sdmmc.c
@@ -33,7 +33,7 @@
 
 u32 sd_power_cycle_time_start;
 
-static inline u32 unstuff_bits(u32 *resp, u32 start, u32 size)
+static inline u32 unstuff_bits(const u32 *resp, u32 start, u32 size)
 {
 	const u32 mask = (size < 32 ? 1 << size : 0) - 1;
 	const u32 off  = 3 - ((start) / 32);
@@ -783,7 +783,7 @@ static int _sd_storage_execute_app_cmd_type1(sdmmc_storage_t *storage, u32 *resp
 }
 
 #ifdef SDMMC_DEBUG_PRINT_SD_REGS
-void _sd_storage_debug_print_cid(u32 *raw_cid)
+void _sd_storage_debug_print_cid(const u32 *raw_cid)
 {
 	gfx_printf("Card Identification\n");
 
@@ -799,7 +799,7 @@ void _sd_storage_debug_print_cid(u32 *raw_cid)
 	gfx_printf("--RSVD--               %X\n",   unstuff_bits(raw_cid, 20, 4));
 }
 
-void _sd_storage_debug_print_csd(u32 *raw_csd)
+void _sd_storage_debug_print_csd(const u32 *raw_csd)
 {
 	gfx_printf("\n");
 
@@ -836,7 +836,7 @@ void _sd_storage_debug_print_csd(u32 *raw_csd)
 		unstuff_bits(raw_csd, 16, 5),  unstuff_bits(raw_csd, 8, 2));
 }
 
-void _sd_storage_debug_print_scr(u32 *raw_scr)
+void _sd_storage_debug_print_scr(const u32 *raw_scr)
 {
 	u32 resp[4];
 	memcpy(&resp[2], raw_scr, 8);
@@ -857,7 +857,7 @@ void _sd_storage_debug_print_scr(u32 *raw_scr)
 	gfx_printf("--RSVD--               %X\n",   unstuff_bits(resp, 36, 2));
 }
 
-void _sd_storage_debug_print_ssr(u8 *raw_ssr)
+void _sd_storage_debug_print_ssr(const u8 *raw_ssr)
 {
 	u32 raw_ssr0[4]; // 511:384.
 	u32 raw_ssr1[4]; // 383:256.
diff --git a/bdk/storage/sdmmc_driver.c b/bdk/storage/sdmmc_driver.c
index 3697692..95336e2 100644
--- a/bdk/storage/sdmmc_driver.c
+++ b/bdk/storage/sdmmc_driver.c
@@ -575,7 +575,7 @@ static int _sdmmc_setup_read_small_block(sdmmc_t *sdmmc)
 	return 1;
 }
 
-static int _sdmmc_send_cmd(sdmmc_t *sdmmc, sdmmc_cmd_t *cmd, bool is_data_present)
+static int _sdmmc_send_cmd(sdmmc_t *sdmmc, const sdmmc_cmd_t *cmd, bool is_data_present)
 {
 	u16 cmdflags = 0;
 
@@ -1025,7 +1025,7 @@ int sdmmc_stop_transmission(sdmmc_t *sdmmc, u32 *rsp)
 	return result;
 }
 
-static int _sdmmc_config_sdma(sdmmc_t *sdmmc, u32 *blkcnt_out, sdmmc_req_t *req)
+static int _sdmmc_config_sdma(sdmmc_t *sdmmc, u32 *blkcnt_out, const sdmmc_req_t *req)
 {
 	if (!req->blksize || !req->num_sectors)
 		return 0;
diff --git a/bdk/usb/usb_gadget_hid.c b/bdk/usb/usb_gadget_hid.c
index 591649a..dc7681a 100644
--- a/bdk/usb/usb_gadget_hid.c
+++ b/bdk/usb/usb_gadget_hid.c
@@ -80,7 +80,7 @@ enum {
 static jc_cal_t jc_cal_ctx;
 static usb_ops_t usb_ops;
 
-static bool _jc_calibration(jc_gamepad_rpt_t *jc_pad)
+static bool _jc_calibration(const jc_gamepad_rpt_t *jc_pad)
 {
 	// Calibrate left stick.
 	if (jc_cal_ctx.cl_step != JC_CAL_MAX_STEPS)
diff --git a/bdk/usb/xusbd.c b/bdk/usb/xusbd.c
index 38578e7..87df551 100644
--- a/bdk/usb/xusbd.c
+++ b/bdk/usb/xusbd.c
@@ -1011,7 +1011,7 @@ static void _xusb_device_power_down()
 	CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = BIT(CLK_W_XUSB);
 }
 
-static int _xusb_queue_trb(u32 ep_idx, void *trb, bool ring_doorbell)
+static int _xusb_queue_trb(u32 ep_idx, const void *trb, bool ring_doorbell)
 {
 	int res = USB_RES_OK;
 	data_trb_t *next_trb;
@@ -1226,7 +1226,7 @@ static int _xusb_wait_ep_stopped(u32 endpoint)
 	return USB_RES_OK;
 }
 
-static int _xusb_handle_transfer_event(transfer_event_trb_t *trb)
+static int _xusb_handle_transfer_event(const transfer_event_trb_t *trb)
 {
 	// Advance dequeue list.
 	data_trb_t *next_trb;
@@ -1461,7 +1461,7 @@ static int _xusb_handle_get_ep_status(u32 ep_idx)
 	return _xusb_issue_data_trb(xusb_ep_status_descriptor, 2, USB_DIR_IN);
 }
 
-static int _xusb_handle_get_class_request(usb_ctrl_setup_t *ctrl_setup)
+static int _xusb_handle_get_class_request(const usb_ctrl_setup_t *ctrl_setup)
 {
 	u8 _bRequest = ctrl_setup->bRequest;
 	u16 _wIndex  = ctrl_setup->wIndex;
@@ -1492,7 +1492,7 @@ stall:
 	return USB_RES_OK;
 }
 
-static int _xusb_handle_get_descriptor(usb_ctrl_setup_t *ctrl_setup)
+static int _xusb_handle_get_descriptor(const usb_ctrl_setup_t *ctrl_setup)
 {
 	u32 size;
 	void *descriptor;
@@ -1621,7 +1621,7 @@ static int _xusb_handle_get_descriptor(usb_ctrl_setup_t *ctrl_setup)
 	return _xusb_issue_data_trb(descriptor, size, USB_DIR_IN);
 }
 
-static void _xusb_handle_set_request_dev_address(usb_ctrl_setup_t *ctrl_setup)
+static void _xusb_handle_set_request_dev_address(const usb_ctrl_setup_t *ctrl_setup)
 {
 	u32 addr = ctrl_setup->wValue & 0xFF;
 
@@ -1633,7 +1633,7 @@ static void _xusb_handle_set_request_dev_address(usb_ctrl_setup_t *ctrl_setup)
 	usbd_xotg->device_state = XUSB_ADDRESSED_STS_WAIT;
 }
 
-static void _xusb_handle_set_request_configuration(usb_ctrl_setup_t *ctrl_setup)
+static void _xusb_handle_set_request_configuration(const usb_ctrl_setup_t *ctrl_setup)
 {
 	usbd_xotg->config_num = ctrl_setup->wValue;
 
diff --git a/bdk/utils/ini.c b/bdk/utils/ini.c
index 104b261..27a4387 100644
--- a/bdk/utils/ini.c
+++ b/bdk/utils/ini.c
@@ -53,7 +53,7 @@ ini_sec_t *_ini_create_section(link_t *dst, ini_sec_t *csec, char *name, u8 type
 	return csec;
 }
 
-int ini_parse(link_t *dst, char *ini_path, bool is_dir)
+int ini_parse(link_t *dst, const char *ini_path, bool is_dir)
 {
 	FIL fp;
 	u32 lblen;
diff --git a/bdk/utils/ini.h b/bdk/utils/ini.h
index 929a850..35c13c8 100644
--- a/bdk/utils/ini.h
+++ b/bdk/utils/ini.h
@@ -43,7 +43,7 @@ typedef struct _ini_sec_t
 	u32 color;
 } ini_sec_t;
 
-int   ini_parse(link_t *dst, char *ini_path, bool is_dir);
+int   ini_parse(link_t *dst, const char *ini_path, bool is_dir);
 char *ini_check_special_section(ini_sec_t *cfg);
 void  ini_free(link_t *src);