Hi Thomas,

Would you mind giving us some details on your use case ?

Do you expect to be able to change only the affectation of the pin and apply preconfigured settings ?

For instance PIN X is:

ALT FUNC 5, pull up, open drain for PWM

Analog for ADC

Input  when GPIO

And then you switch between those config in the application?

Or do you expect to be able to be able to program the pin at run time to any kind of function ?

On Fri, 23 Oct 2020 at 15:07, Carles Cufi <carles.cufi@...> wrote:

Hi Thomas,

 

This is currently not possible, but under active discussion:

https://github.com/zephyrproject-rtos/zephyr/issues/11918

 

Carles

 

From: devel@... <devel@...> On Behalf Of Thomas Hobson via lists.zephyrproject.org
Sent: 23 October 2020 12:16
To: devel@...
Subject: [Zephyr-devel] Runtime pin remapping on STM32F103

 

Hi,

I'm looking for how I would switch a physical pin between ADC, PWM and GPIO, all without the chip being reprogrammed.

I have found pinmux, but I can't tell exactly what it does as documentation is lacking.

 

Thanks a bunch,
Thomas

 

Hi,

I'm looking for how I would switch a physical pin between ADC, PWM and GPIO, all without the chip being reprogrammed.

I have found pinmux, but I can't tell exactly what it does as documentation is lacking.

Thanks a bunch,
Thomas

On Oct 20, 2020, at 1:22 PM, Hiremath, Vijay P <vijay.p.hiremath@intel.com> wrote:

Hi Kumar,

Thanks for the response, still couldn't compile.

const struct device *pin_pp3300_en = DT_GPIO_LABEL(DT_NODELABEL(EC_VR_EN_PP3300_A), gpios);

error: 'DT_N_NODELABEL_EC_VR_EN_PP3300_A_P_gpios_IDX_0_PH_P_label' undeclared (first use in this function)
25 | DT_GPIO_LABEL(DT_NODELABEL(EC_VR_EN_PP3300_A), gpios);

Regards
Vijay

-----Original Message-----
From: Kumar Gala <kumar.gala@linaro.org>
Sent: Tuesday, October 20, 2020 11:09 AM
To: Hiremath, Vijay P <vijay.p.hiremath@intel.com>
Cc: devel@lists.zephyrproject.org
Subject: Re: [Zephyr-devel] zephyr: Getting GPIOs from DTS file without aliases

On Oct 20, 2020, at 12:24 PM, Hiremath, Vijay P <vijay.p.hiremath@intel.com> wrote:

Hi All,

I have a dts file for GPIO configs. I would like to know if it is possible to get the GPIOs without aliases

DTS file:
pow_seq_gpio_keys {
compatible = "gpio-keys";

EC_VR_EN_PP3300_A: GPIOA3 {
label = "EN_PP3300_A";
gpios = <&gpioa 3 GPIO_ACTIVE_HIGH>;
};
};

aliases {
pp3300aout = &EC_VR_EN_PP3300_A;
};

C file:
Compiles:
const struct device *pin_pp3300_en = device_get_binding(DT_GPIO_LABEL(DT_ALIAS(pp3300aout), gpios));

fails to compile:
const struct device *pin_pp3300_en = device_get_binding(DT_GPIO_LABEL(EC_VR_EN_PP3300_A, gpios));

I think you want DT_NODELABEL.

DT_GPIO_LABEL(DT_NODELABEL(EC_VR_EN_PP3300_A), gpios)

- k

On Oct 20, 2020, at 12:24 PM, Hiremath, Vijay P <vijay.p.hiremath@intel.com> wrote:

Hi All,

I have a dts file for GPIO configs. I would like to know if it is possible to get the GPIOs without aliases

DTS file:
pow_seq_gpio_keys {
compatible = "gpio-keys";

EC_VR_EN_PP3300_A: GPIOA3 {
label = "EN_PP3300_A";
gpios = <&gpioa 3 GPIO_ACTIVE_HIGH>;
};
};

aliases {
pp3300aout = &EC_VR_EN_PP3300_A;
};

C file:
Compiles:
const struct device *pin_pp3300_en = device_get_binding(DT_GPIO_LABEL(DT_ALIAS(pp3300aout), gpios));

fails to compile:
const struct device *pin_pp3300_en = device_get_binding(DT_GPIO_LABEL(EC_VR_EN_PP3300_A, gpios));

On Oct 20, 2020, at 12:24 PM, Hiremath, Vijay P <vijay.p.hiremath@intel.com> wrote:

Hi All,

I have a dts file for GPIO configs. I would like to know if it is possible to get the GPIOs without aliases

DTS file:
pow_seq_gpio_keys {
compatible = "gpio-keys";

EC_VR_EN_PP3300_A: GPIOA3 {
label = "EN_PP3300_A";
gpios = <&gpioa 3 GPIO_ACTIVE_HIGH>;
};
};

aliases {
pp3300aout = &EC_VR_EN_PP3300_A;
};

C file:
Compiles:
const struct device *pin_pp3300_en = device_get_binding(DT_GPIO_LABEL(DT_ALIAS(pp3300aout), gpios));

fails to compile:
const struct device *pin_pp3300_en = device_get_binding(DT_GPIO_LABEL(EC_VR_EN_PP3300_A, gpios));