lkml.org 
[lkml]   [2021]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 5/5] phy: cadence-torrent: Add delay for PIPE clock to be stable
Date
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>
---
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
\
 
 \ /
  Last update: 2021-03-30 13:04    [W:0.037 / U:1.160 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site