mfd: cros_ec: Check result code from EC messages

[karo-tx-linux.git] / drivers / mfd / cros_ec.c

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 4851ed2fbe3187a92e6fecbd2dfb59afbb431106..83e30c66357850dc132e5cf005c23597583b19e5 100644 (file)
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -44,6 +44,24 @@ int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
 }
 EXPORT_SYMBOL(cros_ec_prepare_tx);
 
+int cros_ec_check_result(struct cros_ec_device *ec_dev,
+                        struct cros_ec_command *msg)
+{
+       switch (msg->result) {
+       case EC_RES_SUCCESS:
+               return 0;
+       case EC_RES_IN_PROGRESS:
+               dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
+                       msg->command);
+               return -EAGAIN;
+       default:
+               dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",
+                       msg->command, msg->result);
+               return 0;
+       }
+}
+EXPORT_SYMBOL(cros_ec_check_result);
+
 static irqreturn_t ec_irq_thread(int irq, void *data)
 {
        struct cros_ec_device *ec_dev = data;