[PATCH lora-next 01/11] net: lora: sx125x: Abort on wrong version

[Andreas Färber]

This helps detect issues such as the concentrator being in reset.

Enhance error output while at it.

Signed-off-by: Andreas Färber <afaer...@suse.de>
---
 drivers/net/lora/sx125x.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/lora/sx125x.c b/drivers/net/lora/sx125x.c
index 90e7cdb9d1a8..0228d1f887a0 100644
--- a/drivers/net/lora/sx125x.c
+++ b/drivers/net/lora/sx125x.c
@@ -195,9 +195,13 @@ static int __maybe_unused sx125x_regmap_probe(struct 
device *dev, struct regmap
        if (true) {
                ret = regmap_read(priv->regmap, SX1255_VERSION, &val);
                if (ret) {
-                       dev_err(dev, "version read failed\n");
+                       dev_err(dev, "version read failed (%d)\n", ret);
                        return ret;
                }
+               if (val != 0x21) {
+                       dev_err(dev, "unexpected version: %u\n", val);
+                       return -EINVAL;
+               }
                dev_info(dev, "SX125x version: %02x\n", val);
        }
 
-- 
2.16.4