Messages in this thread Patch in this message | | | From | Andreas Färber <> | Subject | [PATCH lora-next 01/11] net: lora: sx125x: Abort on wrong version | Date | Sun, 6 Jan 2019 09:37:44 +0100 |
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This helps detect issues such as the concentrator being in reset.
Enhance error output while at it.
Signed-off-by: Andreas Färber <afaerber@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
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