SK-AM62P-LP: ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19

Sergio Rossi

Part Number: SK-AM62P-LP

Tool/software:

Hi,

in my DMESG i'm having this issues

[ 0.414886] ti-sci 44043000.system-controller: ABI: 4.0 (firmware rev 0x000b '11.0.7--v11.00.07 (Fancy Rat)')
[ 0.463307] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19
[ 0.473928] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19
[ 0.484605] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19

Node referring to the error

&sdhci2 {
/* SDIO Wifi */
status = "okay";
assigned-clocks = <&k3_clks 226 0>;
assigned-clock-parents = <&k3_clks 226 5>;

pinctrl-names = "default";
pinctrl-0 =<&main_mmc2_pins_default>, <&wifi_32k_clk>;

mmc-pwrseq = <&wifi_pwrseq>;
vmmc-supply = <&wl_lt_en>;

non-removable;
ti,fails-without-test-cd;
ti,driver-strength-ohm = <50>;
cap-power-off-card;
keep-power-in-suspend;

};

I'm using k3-am62p5-sk.dts devicetree.

1 month ago

0 Bin Liu 30 days ago

TI__Guru**** 168211 points

Hi Seigio,

Device id 226 does not seem to be related to sdhci2. What are you trying to do here?

0 Sergio Rossi 30 days ago in reply to Bin Liu

Intellectual 335 points

Hi Bin Liu,

I'm trying to start my wi-fi/bluetooth module. As the way it is configured on my sdhci2 now it is working, but i have this messages on my dmesg.

Att.

0 Bin Liu 30 days ago in reply to Sergio Rossi

TI__Guru**** 168211 points

Hi Sergio,

Understood, but why do you add device 226 clk 0 to the sdhci2 node? What is it for?

assigned-clocks = <&k3_clks 226 0>;
assigned-clock-parents = <&k3_clks 226 5>;

0 Sergio Rossi 30 days ago in reply to Bin Liu

Intellectual 335 points

we had followed a other DTS example.

0 Bin Liu 30 days ago in reply to Sergio Rossi

TI__Guru**** 168211 points

Okay, you shouldn't need these two lines, please remove them and let me know if you run into any issues.

0 Sergio Rossi 30 days ago in reply to Bin Liu

Intellectual 335 points

Without these two lines, my wi-fi/bluetoot module didn't work, we had tried it before.

0 Bin Liu 30 days ago in reply to Sergio Rossi

TI__Guru**** 168211 points

Please add the following line before these two lines and let me know if you still see those "get parent failed" messages in kernel log.

clocks = <&k3_clks 226 0>;

0 Sergio Rossi 30 days ago in reply to Bin Liu

Intellectual 335 points

I did as you mentioned and i got this output

[    0.414531] ti-sci 44043000.system-controller: ABI: 4.0 (firmware rev 0x000b '11.0.7--v11.00.07 (Fancy Rat)')
[    0.461793] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19
[    0.472395] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19
[    0.483034] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19

&sdhci2 {
 /* SDIO Wifi */
 status = "okay";
 clocks = <&k3_clks 226 0>;
 assigned-clocks = <&k3_clks 226 0>;
 assigned-clock-parents = <&k3_clks 226 5>;
 
 pinctrl-names = "default";
 pinctrl-0 =<&main_mmc2_pins_default>, <&wifi_32k_clk>;

 mmc-pwrseq = <&wifi_pwrseq>;
 vmmc-supply = <&wl_lt_en>;

 non-removable;
 ti,fails-without-test-cd;
 ti,driver-strength-ohm = <50>;
 cap-power-off-card;
 keep-power-in-suspend;

};

0 Bin Liu 30 days ago in reply to Sergio Rossi

TI__Guru**** 168211 points

Thanks for the testing.

I am out of office for the next few days. I will look into the issue later next week.

0 Sergio Rossi 30 days ago in reply to Bin Liu

Intellectual 335 points

Thank you, I will be waiting for your contact.

+1 Bin Liu 18 days ago in reply to Sergio Rossi

TI__Guru**** 168211 points

Hi Sergio,

[ 0.461793] ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19

Your original devicetree configuration is fine, and you can ignore this error message. It is not really an error.

I believe the message is printed because device 226 clock 0 originally default to no clock.

Processors

Processors forum

SK-AM62P-LP: ti-sci-clk 44043000.system-controller:clock-controller: get-parent failed for dev=226, clk=0, ret=-19