AM3352: TPS65217 device tree definitions

Chris Yorkey

Part Number: AM3352
Other Parts Discussed in Thread: TPS65217

Regarding previous thread for reference:

https://e2e.ti.com/support/power-management/f/196/t/798172

Our customer is looking for how to define the pins in the device tree. There was a patch to the device tree to support the TPS65217. I’m thinking we need guidance on how to read the device tree and look for how it hooks to the kernel. Thanks again for your help or from others in advance.

Regards,

Chris

over 5 years ago

0 Biser Gatchev-XID over 5 years ago

TI__Guru**** 393215 points

Hi Chris,

Which Linux version is this?

0 Chris Yorkey over 5 years ago in reply to Biser Gatchev-XID

TI__Genius 15205 points

Hello Biser,

One of the latest 4.1x versions in fact.

Please let me know if we have device tree pin definitions available for this AM335x/TPS65217 combination.

Thank you,
Chris

0 Pavel Botev over 5 years ago in reply to Chris Yorkey

TI__Guru**** 170625 points

Chris,

You can refer to BEAGLEBK DTS files for reference, as BEAGLEBK is also using TPS65217 PMIC.

linux-kernel/arch/arm/boot/dts/am335x-boneblack.dts
linux-kernel/arch/arm/boot/dts/am335x-boneblack-common.dtsi
linux-kernel/arch/arm/boot/dts/am335x-bone-common.dtsi

You will see that only I2C0 pinmux is described in am33xx_pinmux structure in am335x-bone-common.dtsi file. As the other PMIC pins attached to AM335x device (i.e. C6 pmic_power_on, B15 PORZ) have only one mode and can not be muxed with other modes.

&am33xx_pinmux {
pinctrl-names = "default";
......
i2c0_pins: pinmux_i2c0_pins {
pinctrl-single,pins = <
AM33XX_IOPAD(0x988, PIN_INPUT_PULLUP | MUX_MODE0) /* i2c0_sda.i2c0_sda */
AM33XX_IOPAD(0x98c, PIN_INPUT_PULLUP | MUX_MODE0) /* i2c0_scl.i2c0_scl */
>;
};
...
}

&i2c0 {
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;

status = "okay";
clock-frequency = <400000>;

tps: tps@24 {
reg = <0x24>;
};
....
}

Regards,
Pavel