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net: dsa: microchip: KSZ9893: do not write to not supported Output Clock Control Register 

This issue was detected after adding regmap register access validation.
KSZ9893 compatible chips do not have "Output Clock Control Register
0x0103". So, avoid writing to it.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oleksij Rempel 2022-08-26 12:56:25 +02:00 committed by David S. Miller
parent 9590fc4a2a
commit b5708dc653
1 changed files with 5 additions and 0 deletions
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5
drivers/net/dsa/microchip/ksz9477.c
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@ -193,6 +193,11 @@ int ksz9477_reset_switch(struct ksz_device *dev)
ksz_write32(dev, REG_SW_PORT_INT_MASK__4, 0x7F);
ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data32);
/* KSZ9893 compatible chips do not support refclk configuration */
if (dev->chip_id == KSZ9893_CHIP_ID ||
dev->chip_id == KSZ8563_CHIP_ID)
return 0;
data8 = SW_ENABLE_REFCLKO;
if (dev->synclko_disable)
data8 = 0;