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net: qca_spi: Introduce write register verification

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The SPI protocol for the QCA7000 doesn't have any fault detection.
In order to increase the drivers reliability in noisy environments,
we could implement a write verification inspired by the enc28j60.
This should avoid situations were the driver wrongly assumes the
receive interrupt is enabled and miss all incoming packets.

This function is disabled per default and can be controlled via module
parameter wr_verify.

Signed-off-by: Michael Heimpold <michael.heimpold@i2se.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Wahren
2018-09-24 13:20:10 +02:00
committed by David S. Miller
parent 4128c0cfb1
commit 48c1699ec2
5 changed files with 56 additions and 10 deletions
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drivers/net/ethernet/qualcomm/qca_debug.c
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@@ -60,6 +60,7 @@ static const char qcaspi_gstrings_stats[][ETH_GSTRING_LEN] = {
"Write buffer misses",
"Transmit ring full",
"SPI errors",
"Write verify errors",
};
#ifdef CONFIG_DEBUG_FS