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author | Kishon Vijay Abraham I <kishon@ti.com> | 2021-03-30 16:31:38 +0530 |
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committer | Vinod Koul <vkoul@kernel.org> | 2021-03-31 16:45:47 +0530 |
commit | b20da3c6b9dd0787e3eec996de806829e1bcaad1 (patch) | |
tree | 2a890851558f7ece4fc8303168f3bfdfe76b02f3 /drivers/phy | |
parent | e0611d6d9639b79bd2605a9eb2e5cae28edc3e85 (diff) | |
download | linux-b20da3c6b9dd0787e3eec996de806829e1bcaad1.tar.bz2 |
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>
Diffstat (limited to 'drivers/phy')
-rw-r--r-- | drivers/phy/cadence/phy-cadence-torrent.c | 9 |
1 files changed, 9 insertions, 0 deletions
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, }; |