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net: phy: mscc-miim: use more reasonable delays 

The MSCC MIIM MDIO driver uses delays to read poll a status register. I
made multiple tests on a Ocelot PCS120 platform which led me to reduce
those delays. The delay in between which the polling function is allowed
to sleep is reduced from 100us to 50us which in almost all cases is a
good value to succeed at the first retry. The overall delay is also
lowered as the prior value was really way to high, 10000us is large
enough.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Antoine Tenart 2020-05-26 18:22:53 +02:00 committed by David S. Miller
parent 90ce665c6a
commit 9513167e6c
1 changed files with 1 additions and 1 deletions
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2
drivers/net/phy/mdio-mscc-miim.c
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@ -44,7 +44,7 @@ static int mscc_miim_wait_ready(struct mii_bus *bus)
u32 val;
readl_poll_timeout(miim->regs + MSCC_MIIM_REG_STATUS, val,
!(val & MSCC_MIIM_STATUS_STAT_BUSY), 100, 250000);
!(val & MSCC_MIIM_STATUS_STAT_BUSY), 50, 10000);
if (val & MSCC_MIIM_STATUS_STAT_BUSY)
return -ETIMEDOUT;