diff --git a/qdf/inc/qdf_str.h b/qdf/inc/qdf_str.h
index 59861b35ed..5b94c10f2b 100644
--- a/qdf/inc/qdf_str.h
+++ b/qdf/inc/qdf_str.h
@@ -57,7 +57,7 @@ QDF_STATUS qdf_str_dup(char **dest, const char *src);
  *
  * Return: A pointer to the first non-space character in @str
  */
-static inline char *qdf_str_left_trim(char *str)
+static inline const char *qdf_str_left_trim(const char *str)
 {
 	return __qdf_str_left_trim(str);
 }
diff --git a/qdf/inc/qdf_types.h b/qdf/inc/qdf_types.h
index 09b32a50e0..2ef36a3564 100644
--- a/qdf/inc/qdf_types.h
+++ b/qdf/inc/qdf_types.h
@@ -678,7 +678,7 @@ typedef enum {
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_bool_parse(char *bool_str, bool *out_bool);
+QDF_STATUS qdf_bool_parse(const char *bool_str, bool *out_bool);
 
 /**
  * qdf_int32_parse() - parse the given string as a 32-bit signed integer
@@ -691,7 +691,7 @@ QDF_STATUS qdf_bool_parse(char *bool_str, bool *out_bool);
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_int32_parse(char *int_str, int32_t *out_int);
+QDF_STATUS qdf_int32_parse(const char *int_str, int32_t *out_int);
 
 /**
  * qdf_uint32_parse() - parse the given string as a 32-bit unsigned integer
@@ -704,7 +704,7 @@ QDF_STATUS qdf_int32_parse(char *int_str, int32_t *out_int);
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_uint32_parse(char *int_str, uint32_t *out_int);
+QDF_STATUS qdf_uint32_parse(const char *int_str, uint32_t *out_int);
 
 /**
  * qdf_int64_parse() - parse the given string as a 64-bit signed integer
@@ -717,7 +717,7 @@ QDF_STATUS qdf_uint32_parse(char *int_str, uint32_t *out_int);
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_int64_parse(char *int_str, int64_t *out_int);
+QDF_STATUS qdf_int64_parse(const char *int_str, int64_t *out_int);
 
 /**
  * qdf_uint64_parse() - parse the given string as a 64-bit unsigned integer
@@ -730,7 +730,7 @@ QDF_STATUS qdf_int64_parse(char *int_str, int64_t *out_int);
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_uint64_parse(char *int_str, uint64_t *out_int);
+QDF_STATUS qdf_uint64_parse(const char *int_str, uint64_t *out_int);
 
 #define QDF_MAC_ADDR_SIZE 6
 #define QDF_MAC_ADDR_STR "%02x:%02x:%02x:%02x:%02x:%02x"
@@ -765,7 +765,7 @@ struct qdf_mac_addr {
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_mac_parse(char *mac_str, struct qdf_mac_addr *out_addr);
+QDF_STATUS qdf_mac_parse(const char *mac_str, struct qdf_mac_addr *out_addr);
 
 #define QDF_IPV4_ADDR_SIZE 4
 #define QDF_IPV4_ADDR_STR "%d.%d.%d.%d"
@@ -798,7 +798,7 @@ struct qdf_ipv4_addr {
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_ipv4_parse(char *ipv4_str, struct qdf_ipv4_addr *out_addr);
+QDF_STATUS qdf_ipv4_parse(const char *ipv4_str, struct qdf_ipv4_addr *out_addr);
 
 #define QDF_IPV6_ADDR_SIZE 16
 #define QDF_IPV6_ADDR_HEXTET_COUNT 8
@@ -841,7 +841,7 @@ struct qdf_ipv6_addr {
  *
  * Return: QDF_STATUS
  */
-QDF_STATUS qdf_ipv6_parse(char *ipv6_str, struct qdf_ipv6_addr *out_addr);
+QDF_STATUS qdf_ipv6_parse(const char *ipv6_str, struct qdf_ipv6_addr *out_addr);
 
 #define QDF_MAX_NUM_CHAN   (128)
 
diff --git a/qdf/libc/inc/i_qdf_str.h b/qdf/libc/inc/i_qdf_str.h
index 69a140ac06..4e8956c587 100644
--- a/qdf/libc/inc/i_qdf_str.h
+++ b/qdf/libc/inc/i_qdf_str.h
@@ -25,7 +25,7 @@
 #define __I_QDF_STR_H
 
 #define __qdf_is_space(c) isspace(c)
-char *__qdf_str_left_trim(char *str);
+const char *__qdf_str_left_trim(const char *str);
 char *__qdf_str_trim(char *str);
 #define __qdf_str_nlen(str, limit) strnlen(str, limit)
 
diff --git a/qdf/libc/inc/qdf_str.c b/qdf/libc/inc/qdf_str.c
index 851e9ab6e0..f44a74a943 100644
--- a/qdf/libc/inc/qdf_str.c
+++ b/qdf/libc/inc/qdf_str.c
@@ -18,7 +18,7 @@
 
 #include "i_qdf_str.h"
 
-char *__qdf_str_left_trim(char *str)
+const char *__qdf_str_left_trim(const char *str)
 {
 	while (qdf_str_is_space(str))
 		str++;
@@ -28,7 +28,7 @@ char *__qdf_str_left_trim(char *str)
 
 char *__qdf_str_trim(char *str)
 {
-	char *trimmed = qdf_str_left_trim(str);
+	char *trimmed = (char *)qdf_str_left_trim(str);
 
 	qdf_str_right_trim(str);
 
diff --git a/qdf/src/qdf_types.c b/qdf/src/qdf_types.c
index 46b76d7db3..5886aa5082 100644
--- a/qdf/src/qdf_types.c
+++ b/qdf/src/qdf_types.c
@@ -23,7 +23,7 @@
 #include "qdf_trace.h"
 #include "qdf_types.h"
 
-static QDF_STATUS qdf_consume_char(char **str, char c)
+static QDF_STATUS qdf_consume_char(const char **str, char c)
 {
 	if ((*str)[0] != c)
 		return QDF_STATUS_E_FAILURE;
@@ -33,7 +33,7 @@ static QDF_STATUS qdf_consume_char(char **str, char c)
 	return QDF_STATUS_SUCCESS;
 }
 
-static QDF_STATUS qdf_consume_dec(char **str, uint8_t *out_digit)
+static QDF_STATUS qdf_consume_dec(const char **str, uint8_t *out_digit)
 {
 	uint8_t c = (*str)[0];
 
@@ -47,7 +47,7 @@ static QDF_STATUS qdf_consume_dec(char **str, uint8_t *out_digit)
 	return QDF_STATUS_SUCCESS;
 }
 
-static QDF_STATUS qdf_consume_hex(char **str, uint8_t *out_nibble)
+static QDF_STATUS qdf_consume_hex(const char **str, uint8_t *out_nibble)
 {
 	uint8_t c = (*str)[0];
 
@@ -65,7 +65,7 @@ static QDF_STATUS qdf_consume_hex(char **str, uint8_t *out_nibble)
 	return QDF_STATUS_SUCCESS;
 }
 
-static QDF_STATUS qdf_consume_octet_dec(char **str, uint8_t *out_octet)
+static QDF_STATUS qdf_consume_octet_dec(const char **str, uint8_t *out_octet)
 {
 	uint8_t len = 0;
 	uint16_t octet = 0;
@@ -96,7 +96,7 @@ static QDF_STATUS qdf_consume_octet_dec(char **str, uint8_t *out_octet)
 	return QDF_STATUS_SUCCESS;
 }
 
-static QDF_STATUS qdf_consume_hex_pair(char **str, uint8_t *out_byte)
+static QDF_STATUS qdf_consume_hex_pair(const char **str, uint8_t *out_byte)
 {
 	QDF_STATUS status;
 	uint8_t hi, low;
@@ -116,7 +116,7 @@ static QDF_STATUS qdf_consume_hex_pair(char **str, uint8_t *out_byte)
 	return QDF_STATUS_SUCCESS;
 }
 
-static QDF_STATUS qdf_consume_hextet(char **str, uint16_t *out_hextet)
+static QDF_STATUS qdf_consume_hextet(const char **str, uint16_t *out_hextet)
 {
 	uint8_t len = 0;
 	uint16_t hextet = 0;
@@ -144,7 +144,7 @@ static QDF_STATUS qdf_consume_hextet(char **str, uint16_t *out_hextet)
 	return QDF_STATUS_SUCCESS;
 }
 
-static QDF_STATUS qdf_consume_radix(char **str, uint8_t *out_radix)
+static QDF_STATUS qdf_consume_radix(const char **str, uint8_t *out_radix)
 {
 	if ((*str)[0] == '0') {
 		switch ((*str)[1]) {
@@ -177,7 +177,7 @@ static QDF_STATUS qdf_consume_radix(char **str, uint8_t *out_radix)
 }
 
 static QDF_STATUS
-qdf_int_parse(char *int_str, uint64_t *out_int, bool *out_negate)
+qdf_int_parse(const char *int_str, uint64_t *out_int, bool *out_negate)
 {
 	QDF_STATUS status;
 	bool negate = false;
@@ -227,7 +227,7 @@ qdf_int_parse(char *int_str, uint64_t *out_int, bool *out_negate)
 	return QDF_STATUS_SUCCESS;
 }
 
-QDF_STATUS qdf_int32_parse(char *int_str, int32_t *out_int)
+QDF_STATUS qdf_int32_parse(const char *int_str, int32_t *out_int)
 {
 	QDF_STATUS status;
 	int64_t value;
@@ -245,7 +245,7 @@ QDF_STATUS qdf_int32_parse(char *int_str, int32_t *out_int)
 }
 qdf_export_symbol(qdf_int32_parse);
 
-QDF_STATUS qdf_uint32_parse(char *int_str, uint32_t *out_int)
+QDF_STATUS qdf_uint32_parse(const char *int_str, uint32_t *out_int)
 {
 	QDF_STATUS status;
 	uint64_t value;
@@ -263,7 +263,7 @@ QDF_STATUS qdf_uint32_parse(char *int_str, uint32_t *out_int)
 }
 qdf_export_symbol(qdf_uint32_parse);
 
-QDF_STATUS qdf_int64_parse(char *int_str, int64_t *out_int)
+QDF_STATUS qdf_int64_parse(const char *int_str, int64_t *out_int)
 {
 	QDF_STATUS status;
 	bool negate;
@@ -290,7 +290,7 @@ QDF_STATUS qdf_int64_parse(char *int_str, int64_t *out_int)
 }
 qdf_export_symbol(qdf_int64_parse);
 
-QDF_STATUS qdf_uint64_parse(char *int_str, uint64_t *out_int)
+QDF_STATUS qdf_uint64_parse(const char *int_str, uint64_t *out_int)
 {
 	QDF_STATUS status;
 	bool negate;
@@ -309,7 +309,7 @@ QDF_STATUS qdf_uint64_parse(char *int_str, uint64_t *out_int)
 }
 qdf_export_symbol(qdf_uint64_parse);
 
-QDF_STATUS qdf_bool_parse(char *bool_str, bool *out_bool)
+QDF_STATUS qdf_bool_parse(const char *bool_str, bool *out_bool)
 {
 	bool value;
 
@@ -349,7 +349,7 @@ QDF_STATUS qdf_bool_parse(char *bool_str, bool *out_bool)
 }
 qdf_export_symbol(qdf_bool_parse);
 
-QDF_STATUS qdf_mac_parse(char *mac_str, struct qdf_mac_addr *out_addr)
+QDF_STATUS qdf_mac_parse(const char *mac_str, struct qdf_mac_addr *out_addr)
 {
 	QDF_STATUS status;
 	struct qdf_mac_addr addr;
@@ -398,7 +398,7 @@ QDF_STATUS qdf_mac_parse(char *mac_str, struct qdf_mac_addr *out_addr)
 }
 qdf_export_symbol(qdf_mac_parse);
 
-QDF_STATUS qdf_ipv4_parse(char *ipv4_str, struct qdf_ipv4_addr *out_addr)
+QDF_STATUS qdf_ipv4_parse(const char *ipv4_str, struct qdf_ipv4_addr *out_addr)
 {
 	QDF_STATUS status;
 	struct qdf_ipv4_addr addr;
@@ -441,7 +441,7 @@ QDF_STATUS qdf_ipv4_parse(char *ipv4_str, struct qdf_ipv4_addr *out_addr)
 }
 qdf_export_symbol(qdf_ipv4_parse);
 
-QDF_STATUS qdf_ipv6_parse(char *ipv6_str, struct qdf_ipv6_addr *out_addr)
+QDF_STATUS qdf_ipv6_parse(const char *ipv6_str, struct qdf_ipv6_addr *out_addr)
 {
 	QDF_STATUS status;
 	struct qdf_ipv6_addr addr;