Other Parts Discussed in Thread: SK-AM62B-P1,
Hi TI Experts,
We have AM62 base custom HW modules which uses on module DP83867 Ethernet PHY. This PHY uses 25MHz EXT_REFCLK1 from SOC.
I found that EXT_REFCLK1 25MHz clock goes off in deepsleep mode and comes back with a wrong frequency of 50 MHz. (Already have this thread in e2e for the same). However with the below workaround in ti-sci firmware driver, I could recover the 25 MHz clock back after waking up from deepsleep.
diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index a58d25724365..9b211ce386d7 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3619,6 +3620,20 @@ static int ti_sci_resume(struct device *dev)
return ret;
dev_dbg(dev, "%s: disable isolation: %d\n", __func__, ret);
+ /* ti_sci_cmd_clk_set_freq(const struct ti_sci_handle *handle,
+ u32 dev_id, u32 clk_id, u64 min_freq,
+ u64 target_freq, u64 max_freq); */
+
+ ret = ti_sci_cmd_clk_set_freq(&info->handle, 157, 20, 0, 25000000, 50000000);
+
+ if (ret) {
+ dev_info(dev, "%s: setting EXT_REFCLK1 at 25MHz failed with error : %d\n", __func__, ret);
+ return ret;
+ }
+
+ dev_info(dev, "%s: setting EXT_REFCLK1 at 25MHz success : %d\n", __func__, ret);
ti_sci_msg_cmd_lpm_wake_reason(&info->handle, &source, &time);
dev_info(dev, "%s: wakeup source: 0x%X\n", __func__, source);
By doing above workaround, I am still unable to make Ethernet interface (DP83867 Ethernet PHY) working. Eth0 link status is not resuming back online. Unable to get IP for eth0 interface after wake up from deepsleep.
Please see below status logs of eth0 upon resuming from deepsleep.
root@verdin-am62-15133510:~# ifconfig
eth0: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC> mtu 1500
inet6 fe80::214:2dff:fee6:eb46 prefixlen 64 scopeid 0x20<link>
ether 00:14:2d:e6:eb:46 txqueuelen 1000 (Ethernet)
RX packets 77 bytes 6838 (6.6 KiB)
RX errors 0 dropped 43 overruns 0 frame 0
TX packets 115 bytes 20379 (19.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 213 bytes 15432 (15.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 213 bytes 15432 (15.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
usb0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.11.1 netmask 255.255.255.0 broadcast 192.168.11.255
inet6 fe80::a413:aff:feda:7f7d prefixlen 64 scopeid 0x20<link>
ether a6:13:0a:da:7f:7d txqueuelen 1000 (Ethernet)
RX packets 112 bytes 16551 (16.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 44 bytes 7996 (7.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 10Mb/s
Duplex: Half
Auto-negotiation: on
master-slave cfg: preferred slave
master-slave status: unknown
Port: Twisted Pair
PHYAD: 0
Transceiver: external
MDI-X: Unknown
Supports Wake-on: ubgs
Wake-on: ubgs
SecureOn password: ff:ff:ff:ff:ff:ff
Current message level: 0x000020f7 (8439)
drv probe link ifdown ifup rx_err tx_err hw
Link detected: no
root@verdin-am62-15133510:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,DYNAMIC,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether 00:14:2d:e6:eb:46 brd ff:ff:ff:ff:ff:ff
3: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
link/can
4: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
link/can
5: mlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 6c:1d:eb:9d:38:4d brd ff:ff:ff:ff:ff:ff
6: uap0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 6c:1d:eb:9d:3a:4d brd ff:ff:ff:ff:ff:ff
7: usb0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether a6:13:0a:da:7f:7d brd ff:ff:ff:ff:ff:ff
inet 192.168.11.1/24 brd 192.168.11.255 scope global usb0
valid_lft forever preferred_lft forever
inet6 fe80::a413:aff:feda:7f7d/64 scope link
valid_lft forever preferred_lft forever
Questions :
- Is DP83867 Ethernet PHY supports XI clock breakage (going off and getting on again) during it's operation in current SW ? (As per the datasheet https://www.ti.com/lit/gpn/dp83867ir, PHY supports deepsleep mode in which XI can be turned off, however present dp83867 Linux driver is not supporting this feature as far as I can understand)
- If answer to Q#1 is no, what could be the solution for this issue ?
- How to make eth0 (DP83867) functionally working after deepsleep wakeup while using an internal EXT_REFCLK1 25MHz clock ?
SW details:
- All SW components at latest and greatest tag - '09.01.00.008' from the December 2023 release
- DTSI: https://git.toradex.com/cgit/linux-toradex.git/tree/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi?h=toradex_ti-linux-6.1.y
Looking forward for support.
Thank you.
Regards,
Parth P
