firmware: arm_scmi: Move boiler plate code into the get info functions

This code to check whether the selector is valid and if the item has
already been recorded in the array can be moved to the
scmi_pinctrl_get_function_info() type functions.  That way it's in
one place instead of duplicated in each of the callers.

Remove the check for if "pi->nr_groups == 0" because if that were the
case then "selector >= pi->nr_groups" would already be true.  It already
was not checked for the pin case so this makes things a bit more uniform.

Also remove the check for if (!pin) since pin is an offset into the
middle of an array and can't be NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Message-Id: <287b5302f583e3535d50617ec3b0856e38253171.1761576798.git.dan.carpenter@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Author: Dan Carpenter

drivers/firmware/arm_scmi/pinctrl.c

@@ -596,11 +596,19 @@ static int scmi_pinctrl_pin_free(const struct scmi_protocol_handle *ph, u32 pin)
 }
 
 static int scmi_pinctrl_get_group_info(const struct scmi_protocol_handle *ph,
-				       u32 selector,
-				       struct scmi_group_info *group)
+				       u32 selector)
 {
+	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	struct scmi_group_info *group;
 	int ret;
 
+	if (selector >= pi->nr_groups)
+		return -EINVAL;
+
+	group = &pi->groups[selector];
+	if (group->present)
+		return 0;
+
 	ret = scmi_pinctrl_attributes(ph, GROUP_TYPE, selector, group->name,
 				      &group->nr_pins);
 	if (ret)
@@ -632,21 +640,14 @@ static int scmi_pinctrl_get_group_name(const struct scmi_protocol_handle *ph,
 				       u32 selector, const char **name)
 {
 	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	int ret;
 
 	if (!name)
 		return -EINVAL;
 
-	if (selector >= pi->nr_groups || pi->nr_groups == 0)
-		return -EINVAL;
-
-	if (!pi->groups[selector].present) {
-		int ret;
-
-		ret = scmi_pinctrl_get_group_info(ph, selector,
-						  &pi->groups[selector]);
-		if (ret)
-			return ret;
-	}
+	ret = scmi_pinctrl_get_group_info(ph, selector);
+	if (ret)
+		return ret;
 
 	*name = pi->groups[selector].name;
 
@@ -658,21 +659,14 @@ static int scmi_pinctrl_group_pins_get(const struct scmi_protocol_handle *ph,
 				       u32 *nr_pins)
 {
 	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	int ret;
 
 	if (!pins || !nr_pins)
 		return -EINVAL;
 
-	if (selector >= pi->nr_groups || pi->nr_groups == 0)
-		return -EINVAL;
-
-	if (!pi->groups[selector].present) {
-		int ret;
-
-		ret = scmi_pinctrl_get_group_info(ph, selector,
-						  &pi->groups[selector]);
-		if (ret)
-			return ret;
-	}
+	ret = scmi_pinctrl_get_group_info(ph, selector);
+	if (ret)
+		return ret;
 
 	*pins = pi->groups[selector].group_pins;
 	*nr_pins = pi->groups[selector].nr_pins;
@@ -681,11 +675,19 @@ static int scmi_pinctrl_group_pins_get(const struct scmi_protocol_handle *ph,
 }
 
 static int scmi_pinctrl_get_function_info(const struct scmi_protocol_handle *ph,
-					  u32 selector,
-					  struct scmi_function_info *func)
+					  u32 selector)
 {
+	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	struct scmi_function_info *func;
 	int ret;
 
+	if (selector >= pi->nr_functions)
+		return -EINVAL;
+
+	func = &pi->functions[selector];
+	if (func->present)
+		return 0;
+
 	ret = scmi_pinctrl_attributes(ph, FUNCTION_TYPE, selector, func->name,
 				      &func->nr_groups);
 	if (ret)
@@ -716,21 +718,14 @@ static int scmi_pinctrl_get_function_name(const struct scmi_protocol_handle *ph,
 					  u32 selector, const char **name)
 {
 	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	int ret;
 
 	if (!name)
 		return -EINVAL;
 
-	if (selector >= pi->nr_functions || pi->nr_functions == 0)
-		return -EINVAL;
-
-	if (!pi->functions[selector].present) {
-		int ret;
-
-		ret = scmi_pinctrl_get_function_info(ph, selector,
-						     &pi->functions[selector]);
-		if (ret)
-			return ret;
-	}
+	ret = scmi_pinctrl_get_function_info(ph, selector);
+	if (ret)
+		return ret;
 
 	*name = pi->functions[selector].name;
 	return 0;
@@ -742,21 +737,14 @@ scmi_pinctrl_function_groups_get(const struct scmi_protocol_handle *ph,
 				 const u32 **groups)
 {
 	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	int ret;
 
 	if (!groups || !nr_groups)
 		return -EINVAL;
 
-	if (selector >= pi->nr_functions || pi->nr_functions == 0)
-		return -EINVAL;
-
-	if (!pi->functions[selector].present) {
-		int ret;
-
-		ret = scmi_pinctrl_get_function_info(ph, selector,
-						     &pi->functions[selector]);
-		if (ret)
-			return ret;
-	}
+	ret = scmi_pinctrl_get_function_info(ph, selector);
+	if (ret)
+		return ret;
 
 	*groups = pi->functions[selector].groups;
 	*nr_groups = pi->functions[selector].nr_groups;
@@ -771,13 +759,19 @@ static int scmi_pinctrl_mux_set(const struct scmi_protocol_handle *ph,
 }
 
 static int scmi_pinctrl_get_pin_info(const struct scmi_protocol_handle *ph,
-				     u32 selector, struct scmi_pin_info *pin)
+				     u32 selector)
 {
+	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	struct scmi_pin_info *pin;
 	int ret;
 
-	if (!pin)
+	if (selector >= pi->nr_pins)
 		return -EINVAL;
 
+	pin = &pi->pins[selector];
+	if (pin->present)
+		return 0;
+
 	ret = scmi_pinctrl_attributes(ph, PIN_TYPE, selector, pin->name, NULL);
 	if (ret)
 		return ret;
@@ -790,20 +784,14 @@ static int scmi_pinctrl_get_pin_name(const struct scmi_protocol_handle *ph,
 				     u32 selector, const char **name)
 {
 	struct scmi_pinctrl_info *pi = ph->get_priv(ph);
+	int ret;
 
 	if (!name)
 		return -EINVAL;
 
-	if (selector >= pi->nr_pins)
-		return -EINVAL;
-
-	if (!pi->pins[selector].present) {
-		int ret;
-
-		ret = scmi_pinctrl_get_pin_info(ph, selector, &pi->pins[selector]);
-		if (ret)
-			return ret;
-	}
+	ret = scmi_pinctrl_get_pin_info(ph, selector);
+	if (ret)
+		return ret;
 
 	*name = pi->pins[selector].name;