Commit b20da3c6 authored Mar 30, 2021 by Kishon Vijay Abraham I Committed by Vinod Koul Mar 31, 2021

phy: cadence-torrent: Add delay for PIPE clock to be stable



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 <kishon@ti.com>
Link: https://lore.kernel.org/r/20210330110138.24356-6-kishon@ti.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>

parent e0611d6d

drivers/phy/cadence/phy-cadence-torrent.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -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,
		};