thermal/drivers/int340x: processor_thermal: Export mailbox interface

Export the mailbox interface to be used by other modules. Also change
command id and response from u8 to u32 data type.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210517061441.1921901-2-srinivas.pandruvada@linux.intel.com

drivers/thermal/intel/int340x_thermal/processor_thermal_device.h

@@ -79,4 +79,6 @@ void proc_thermal_rfim_remove(struct pci_dev *pdev);
 int proc_thermal_mbox_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv);
 void proc_thermal_mbox_remove(struct pci_dev *pdev);
 
+int processor_thermal_send_mbox_cmd(struct pci_dev *pdev, u16 cmd_id, u32 cmd_data, u32 *cmd_resp);
+
 #endif

drivers/thermal/intel/int340x_thermal/processor_thermal_mbox.c

@@ -23,7 +23,7 @@
 
 static DEFINE_MUTEX(mbox_lock);
 
-static int send_mbox_cmd(struct pci_dev *pdev, u8 cmd_id, u32 cmd_data, u8 *cmd_resp)
+static int send_mbox_cmd(struct pci_dev *pdev, u16 cmd_id, u32 cmd_data, u32 *cmd_resp)
 {
 	struct proc_thermal_device *proc_priv;
 	u32 retries, data;
@@ -82,6 +82,12 @@ static int send_mbox_cmd(struct pci_dev *pdev, u8 cmd_id, u32 cmd_data, u8 *cmd_
 	return ret;
 }
 
+int processor_thermal_send_mbox_cmd(struct pci_dev *pdev, u16 cmd_id, u32 cmd_data, u32 *cmd_resp)
+{
+	return send_mbox_cmd(pdev, cmd_id, cmd_data, cmd_resp);
+}
+EXPORT_SYMBOL_GPL(processor_thermal_send_mbox_cmd);
+
 /* List of workload types */
 static const char * const workload_types[] = {
 	"none",
@@ -147,7 +153,7 @@ static ssize_t workload_type_show(struct device *dev,
 				   char *buf)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
-	u8 cmd_resp;
+	u32 cmd_resp;
 	int ret;
 
 	ret = send_mbox_cmd(pdev, MBOX_CMD_WORKLOAD_TYPE_READ, 0, &cmd_resp);
@@ -181,7 +187,7 @@ static bool workload_req_created;
 
 int proc_thermal_mbox_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
 {
-	u8 cmd_resp;
+	u32 cmd_resp;
 	int ret;
 
 	/* Check if there is a mailbox support, if fails return success */