imx6 - pincontrol - iomux configuration in device tree

imx6 - pincontrol - iomux configuration in device tree

[ansaris]

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Hi,


We are using imx6Q sabresd platform for our development with Linux 
3.10.17_1.0.0-GA BSP.

In device tree, the UART1 IOMUX configuration is done in 
"arch/arm/boot/dts/imx6qdl.dtsi" file as mentioned below.

uart1 {
pinctrl_uart1_1: uart1grp-1 {
fsl,pins = <
MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA 0x1b0b1
MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
>;
};
};


We would like to know, in which file the IOMUX configuration will be called?
We have gone through the "linux-imx/drivers/tty/serial/imx.c" file. But 
we couldn't find the below function for IOMUX configuration

"devm_pinctrl_get_select_default"


In addition, the flexcan IOMUX configuration is called  in 
"drivers/net/can/flexcan.c" file as mentioned below (from the probe 
function call)

	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
	if (IS_ERR(pinctrl))
	return PTR_ERR(pinctrl);


Please suggest us for better understanding.


Thank You,
Regards,
Ansari


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Re: imx6 - pincontrol - iomux configuration in device tree

[Sven Ebenfeld]

Hi,

As far as I know, this is done by the pinctrl-driver.
The uart-driver should init the pinctrl for this particular device
during it's probe or init function.

Regards,
Sven

Am 08.10.2014 17:19, schrieb ansaris:
> Hi,
> 
> 
> We are using imx6Q sabresd platform for our development with Linux
> 3.10.17_1.0.0-GA BSP.
> 
> In device tree, the UART1 IOMUX configuration is done in
> "arch/arm/boot/dts/imx6qdl.dtsi" file as mentioned below.
> 
> uart1 {
> pinctrl_uart1_1: uart1grp-1 {
> fsl,pins = <
> MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA 0x1b0b1
> MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
>> ;
> };
> };
> 
> 
> We would like to know, in which file the IOMUX configuration will be
> called?
> We have gone through the "linux-imx/drivers/tty/serial/imx.c" file. But
> we couldn't find the below function for IOMUX configuration
> 
> "devm_pinctrl_get_select_default"
> 
> 
> In addition, the flexcan IOMUX configuration is called  in
> "drivers/net/can/flexcan.c" file as mentioned below (from the probe
> function call)
> 
>     pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
>     if (IS_ERR(pinctrl))
>     return PTR_ERR(pinctrl);
> 
> 
> Please suggest us for better understanding.
> 
> 
> Thank You,
> Regards,
> Ansari
> 
> 
> 
>