TDA4VH-Q1: ECAP/EPWM

chen chen

Intellectual 356 points

Part Number: TDA4VH-Q1
Other Parts Discussed in Thread: TDA4VH

Tool/software:

Does TDA4VH SDK support ECAP and EPWM driver？ we did not find device from dts。

5 months ago

0 Doredla Sudheer Kumar 5 months ago

TI__Guru 64050 points

Hi,

We don't have support form Linux SDK. These are supported by MCUSW (MCAL drivers) from RTOS SDK.

Best Regards,
Sudheer

0 jeremy borgman 5 months ago in reply to Doredla Sudheer Kumar

Prodigy 130 points

Hello,

Is there a plan to add this to the linux SDK for J784S4? It looks like it is already supported in J722S.

0 Tony Tang 5 months ago in reply to Doredla Sudheer Kumar

TI__Mastermind 29002 points

Hi Kumar,

ECAP and PWM driver were supported in AM62x SDK from build sheet. I suppose they are same IP, should be able to migrate across, Will product line provide a guide and dts configuration file for customer?

https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/09_02_01_09/exports/docs/devices/AM62X/AM62X_build_sheet_09.02.01.htm

0 Doredla Sudheer Kumar 5 months ago in reply to Tony Tang

TI__Guru 64050 points

Hi,

EPWM is supported in TI SDK 10.1, but ECAP was not yet.

Please refer to below patch to enable ECAP on TDA4VH device.
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/4857.ecap_5F00_enable.patch

Best Regards,
Sudheer

0 chen chen 5 months ago in reply to Doredla Sudheer Kumar

Intellectual 356 points

Can ECAP support capture function? we want capture and report PWM signal from FAN speed.

"pwm-tiecap.c" don't have support capture function.

0 Doredla Sudheer Kumar 5 months ago in reply to chen chen

TI__Guru 64050 points

Hi,

chen chen said:
Can ECAP support capture function?

ECAP is a capture module in SoC, we don't have any application in Linux for ECAP for reference.

Above patch is enable ECAP from SoC.

Best Regards,
Sudheer

0 chen chen 4 months ago in reply to Doredla Sudheer Kumar

Intellectual 356 points

is there plan to support linux driver (pwm-tiecap.c) for capture the signal for input PWM?

0 Doredla Sudheer Kumar 4 months ago in reply to chen chen

TI__Guru 64050 points

Hi,

chen chen said:
is there plan to support linux driver (pwm-tiecap.c) for capture the signal for input PWM?

pwm-tiecap.c is for PWM generation.

ti-ecap-capture.c is for Capture functionality.

Best Regards,
Sudheer

0 chen chen 4 months ago in reply to Doredla Sudheer Kumar

Intellectual 356 points

like modify dts "ti,am3352-ecap" <=====> "ti,am62-ecap-capture" ??

ecap0:pwm@3100000 {

compatiable = "ti,am62-ecap-capture";

#pwm-cells = <3>;

reg = <0x00 0x3100000 0x00 0x100>;

power-domains = <&k3_pds 126 TI_SCI_PD_EXCLUSIVE>;

clocks = <&k3_clks 126 0>;
clock-names = "fck";

};

0 chen chen 4 months ago in reply to Doredla Sudheer Kumar

Intellectual 356 points

how can we config the irq in dts ? there are any other modify in dts ?

0 Doredla Sudheer Kumar 4 months ago in reply to chen chen

TI__Guru 64050 points

Hi,

Driver suppose the irq registration with kernel.

Please check the driver once.

Best Regards,

Sudheer

0 chen chen 4 months ago in reply to Doredla Sudheer Kumar

Intellectual 356 points

Hi,

Driver use "platform_get_irq( )" get irq from dts, so we need to know information as hw irq no and attribute like “interrupts = <GIC_SPI xxx IRQ_TYPE_LEVEL_HIGH >”

0 Doredla Sudheer Kumar 4 months ago in reply to chen chen

TI__Guru 64050 points

Hi,

chen chen said:
Driver use "platform_get_irq( )" get irq from dts, so we need to know information as hw irq no and attribute like “interrupts = <GIC_SPI xxx IRQ_TYPE_LEVEL_HIGH >”

We need to map interrupts in device tree.

We are working internally to confirm the same, will share the patch soon after.

chen chen said:
like modify dts "ti,am3352-ecap" <=====> "ti,am62-ecap-capture" ??

Also, yes we need to update dts with above compatible name and also need change the below as well.

>> ecap0:pwm@3100000 {
ecap0:capture@3100000 { for enabling capture mode.

Best Regards,
Sudheer

+1 Doredla Sudheer Kumar 4 months ago in reply to Doredla Sudheer Kumar

TI__Guru 64050 points

Hi,

Doredla Sudheer Kumar said:
chen chen said:
Driver use "platform_get_irq( )" get irq from dts, so we need to know information as hw irq no and attribute like “interrupts = <GIC_SPI xxx IRQ_TYPE_LEVEL_HIGH >”

We need to map interrupts in device tree.

We are working internally to confirm the same, will share the patch soon after.

Please use the updated patch for enabling capture mode and Interrupts.
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/ecap_5F00_capture_5F00_j784s4.patch

Best Regards,
Sudheer

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TDA4VH-Q1: ECAP/EPWM