drivers: ieee802154: set 'ieee802154_radio_api' as 'static const'

This change marks each instance of the 'api' as 'static const'.
The rationale is that 'api' is used for declaring internal
module interfaces and is not intended to be modified at runtime.
By using 'static const', we ensure immutability, leading to usage of only
.rodata and a reduction in the .data area.

Signed-off-by: Pisit Sawangvonganan <[email protected]>

Author: ndrs-pst

drivers/ieee802154/ieee802154_b91.c

@@ -617,7 +617,7 @@ static int b91_attr_get(const struct device *dev, enum ieee802154_attr attr,
 }
 
 /* IEEE802154 driver APIs structure */
-static struct ieee802154_radio_api b91_radio_api = {
+static const struct ieee802154_radio_api b91_radio_api = {
 	.iface_api.init = b91_iface_init,
 	.get_capabilities = b91_get_capabilities,
 	.cca = b91_cca,

drivers/ieee802154/ieee802154_cc1200.c

@@ -813,7 +813,7 @@ static const struct cc1200_config cc1200_config = {
 
 static struct cc1200_context cc1200_context_data;
 
-static struct ieee802154_radio_api cc1200_radio_api = {
+static const struct ieee802154_radio_api cc1200_radio_api = {
 	.iface_api.init	= cc1200_iface_init,
 
 	.get_capabilities	= cc1200_get_capabilities,

drivers/ieee802154/ieee802154_cc13xx_cc26xx.c

@@ -570,7 +570,7 @@ static void ieee802154_cc13xx_cc26xx_iface_init(struct net_if *iface)
 	ieee802154_init(iface);
 }
 
-static struct ieee802154_radio_api ieee802154_cc13xx_cc26xx_radio_api = {
+static const struct ieee802154_radio_api ieee802154_cc13xx_cc26xx_radio_api = {
 	.iface_api.init = ieee802154_cc13xx_cc26xx_iface_init,
 
 	.get_capabilities = ieee802154_cc13xx_cc26xx_get_capabilities,

drivers/ieee802154/ieee802154_cc13xx_cc26xx_subg.c

@@ -909,7 +909,7 @@ static void ieee802154_cc13xx_cc26xx_subg_iface_init(struct net_if *iface)
 	ieee802154_init(iface);
 }
 
-static struct ieee802154_radio_api
+static const struct ieee802154_radio_api
 	ieee802154_cc13xx_cc26xx_subg_radio_api = {
 	.iface_api.init = ieee802154_cc13xx_cc26xx_subg_iface_init,
 

drivers/ieee802154/ieee802154_cc2520.c

@@ -1057,7 +1057,7 @@ static const struct cc2520_config cc2520_config = {
 
 static struct cc2520_context cc2520_context_data;
 
-static struct ieee802154_radio_api cc2520_radio_api = {
+static const struct ieee802154_radio_api cc2520_radio_api = {
 	.iface_api.init	= cc2520_iface_init,
 
 	.get_capabilities	= cc2520_get_capabilities,

drivers/ieee802154/ieee802154_dw1000.c

@@ -1659,7 +1659,7 @@ static void dwt_iface_api_init(struct net_if *iface)
 	LOG_INF("Iface initialized");
 }
 
-static struct ieee802154_radio_api dwt_radio_api = {
+static const struct ieee802154_radio_api dwt_radio_api = {
 	.iface_api.init		= dwt_iface_api_init,
 
 	.get_capabilities	= dwt_get_capabilities,

drivers/ieee802154/ieee802154_kw41z.c

@@ -1091,7 +1091,7 @@ static int kw41z_attr_get(const struct device *dev, enum ieee802154_attr attr,
 		&drv_attr.phy_supported_channels, value);
 }
 
-static struct ieee802154_radio_api kw41z_radio_api = {
+static const struct ieee802154_radio_api kw41z_radio_api = {
 	.iface_api.init	= kw41z_iface_init,
 
 	.get_capabilities	= kw41z_get_capabilities,

drivers/ieee802154/ieee802154_mcr20a.c

@@ -1452,7 +1452,7 @@ static const struct mcr20a_config mcr20a_config = {
 
 static struct mcr20a_context mcr20a_context_data;
 
-static struct ieee802154_radio_api mcr20a_radio_api = {
+static const struct ieee802154_radio_api mcr20a_radio_api = {
 	.iface_api.init	= mcr20a_iface_init,
 
 	.get_capabilities	= mcr20a_get_capabilities,

drivers/ieee802154/ieee802154_nrf5.c

@@ -1199,7 +1199,7 @@ static const struct nrf5_802154_config nrf5_radio_cfg = {
 	.irq_config_func = nrf5_irq_config,
 };
 
-static struct ieee802154_radio_api nrf5_radio_api = {
+static const struct ieee802154_radio_api nrf5_radio_api = {
 	.iface_api.init = nrf5_iface_init,
 
 	.get_capabilities = nrf5_get_capabilities,

drivers/ieee802154/ieee802154_rf2xx.c

@@ -1084,7 +1084,7 @@ static void rf2xx_iface_init(struct net_if *iface)
 	ieee802154_init(iface);
 }
 
-static struct ieee802154_radio_api rf2xx_radio_api = {
+static const struct ieee802154_radio_api rf2xx_radio_api = {
 	.iface_api.init		= rf2xx_iface_init,
 
 	.get_capabilities	= rf2xx_get_capabilities,