With a clock interval of 400 nsec and a 64 bit transactions (32 bit
preamble & 16 bit control & 16 bit data), it is reasonable to assume
the mdio transaction will take 25.6 usec. Add a 30 usec delay before
the first poll to reduce the chance of a 1000-2000 usec sleep.
Reduce the timeout from 1000ms to 100ms as it is unlikely for the bus
to take this long.
Signed-off-by: Justin Chen <justin.chen@broadcom.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20231213222744.2891184-2-justin.chen@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
static int unimac_mdio_poll(void *wait_func_data)
{
struct unimac_mdio_priv *priv = wait_func_data;
- unsigned int timeout = 1000;
+ unsigned int timeout = 100;
+
+ /*
+ * C22 transactions should take ~25 usec, will need to adjust
+ * if C45 support is added.
+ */
+ udelay(30);
do {
if (!unimac_mdio_busy(priv))