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generic: ar8216: add mib_poll_interval switch attribute

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This allows specifying interval of polling MIB counters from userspace
and allow completely turning off MIB counter support by setting
mib_poll_interval to 0.

Since MIB counter polling is a heavy CPU load for GPIO emulated MDIO
bus, disable this behavior by default. Those who wants to use swconfig
LEDs can enable them with qca,mib-poll-interval dts property or with
swconfig command.

Fixes: FS#2230 ("kworker spikes 100% cpu every 2 second.")
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
This commit is contained in:
Chuanhong Guo
2019-04-09 21:32:32 +08:00
committed by Petr Štetiar
parent df6e8c8771
commit 107dc4326c
3 changed files with 63 additions and 8 deletions
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7
target/linux/generic/files/drivers/net/phy/ar8327.c
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@@ -1321,6 +1321,13 @@ static const struct switch_attr ar8327_sw_attr_globals[] = {
.description = "Reset all MIB counters",
.set = ar8xxx_sw_set_reset_mibs,
},
{
.type = SWITCH_TYPE_INT,
.name = "ar8xxx_mib_poll_interval",
.description = "MIB polling interval in msecs (0 to disable)",
.set = ar8xxx_sw_set_mib_poll_interval,
.get = ar8xxx_sw_get_mib_poll_interval
},
{
.type = SWITCH_TYPE_INT,
.name = "enable_mirror_rx",