Linux/AM5728: UART configuration

guan

Prodigy 165 points

Part Number: AM5728

Tool/software: Linux

In the device tree ile am57xx-idk-common.dtsi, I have seen these:

&uart3 {
status = "okay";
interrupts-extended = <&crossbar_mpu GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH
&dra7_pmx_core 0x248>;
};

What's mean of <&dra7_pmx_core 0x248>, and how can I calculate the number after dra7_pmx_cure for a new UART?

Thanks.

over 7 years ago

0 Pavel Botev over 7 years ago

TI__Guru**** 170625 points

Hi Guan,

Do you use AM57x PSDK Linux? If yes, which version?

Regards,
Pavel

0 guan over 7 years ago in reply to Pavel Botev

Prodigy 165 points

Hi Pavel,

Yes, I am using sdk 5.01.

Best Regards,
Guan Qing

0 Pavel Botev over 7 years ago in reply to guan

TI__Guru**** 170625 points

Guan,

The value for &dra7_pmx_core will have a different address based on the mux mode.

<&dra7_pmx_core 0x248> correspond to CTRL_CORE_PAD_UART3_RXD register (addr is 0x4A002000 + 0x14000 + 0x248).

dra7_pmx_core is the start point of the pinmux registers at Control Module.

See also if below pointers will be in help:

e2e.ti.com/.../692735
e2e.ti.com/.../687421

Regards,
Pavel

0 guan over 7 years ago in reply to Pavel Botev

Prodigy 165 points

Hi, Pavel
Thanks for your help, and I have found the these registers in document SPRUHZ6J.

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Linux/AM5728: UART configuration