[PATCH v2 5/5] phy: cadence-torrent: Add delay for PIPE clock to be stable
STALE2011d
LANDED
From: Kishon Vijay Abraham I <hidden>
Date: 2021-03-30 11:03:05
Also in:
lkml
Subsystem:
generic phy framework, the rest · Maintainers:
Vinod Koul, Linus Torvalds
Landed in mainline as b20da3c6b9dd on 2021-03-31.
The Torrent spec specifies delay of 660.5us after phy_reset is asserted by the controller. To be on the safe side provide a delay of 5ms to 10ms in ->phy_on() callback where the SERDES is already configured in bootloader. Signed-off-by: Kishon Vijay Abraham I <redacted> --- drivers/phy/cadence/phy-cadence-torrent.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index ff8bb4b724c0..0477e7beebbf 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c@@ -371,7 +371,16 @@ static const struct phy_ops cdns_torrent_phy_ops = { .owner = THIS_MODULE, }; +static int cdns_torrent_noop_phy_on(struct phy *phy) +{ + /* Give 5ms to 10ms delay for the PIPE clock to be stable */ + usleep_range(5000, 10000); + + return 0; +} + static const struct phy_ops noop_ops = { + .power_on = cdns_torrent_noop_phy_on, .owner = THIS_MODULE, };
--
2.17.1
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