i.MX ProcessorsのトピックRe: imx7 Sim Card Device Tree

imx7 Sim Card Device Tree

eoin_oconnell — Mon, 02 Nov 2020 15:30:31 GMT

Hi all,

I have a SIM card that is connected to my imx7D processor on the following pins (through a level shifter IC):

pinctrl_sim1: sim-grp { fsl,pins = < MX7D_PAD_EPDC_DATA00__SIM1_PORT2_TRXD 0x00 /* SODIMM 111*/ MX7D_PAD_EPDC_DATA01__SIM1_PORT2_CLK 0x00 /* SODIMM 113*/ MX7D_PAD_EPDC_DATA02__SIM1_PORT2_RST_B 0x00 /* SODIMM 115*/ MX7D_PAD_EPDC_DATA03__SIM1_PORT2_SVEN 0x00 /* SODIMM 117*/ MX7D_PAD_EPDC_DATA04__SIM1_PORT2_PD 0x50 /* SODIMM 119 47k pull up*/ >; };

I have the card detect pin from my sim connector connected to MX7D_PAD_EPDC_DATA04__SIM1_PORT2_PD, when the card is present it pulls this pin down to ground.

To define the SIM in the device tree I tried this:

&sim1 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sim1>; clocks = <&clks IMX7D_SIM1_ROOT_CLK>; assigned-clock-rates = <240000000>; pinctrl-assert-gpios = <&gpio2 4 GPIO_ACTIVE_HIGH>; port = <2>; sven_high_active; status = "okay"; };

Unfortunately the sim peripheral does not show up in /dev/mxc_sim, however I do measure sensible voltages on the SIM pins and my card detect hardware is working.

I also added this extra define into my Kernel build, CONFIG_MXC_SIMv2 = y.

Does anybody know what I might have done wrong?

Re: imx7 Sim Card Device Tree

igorpadykov — Tue, 03 Nov 2020 01:12:38 GMT

Hi eoin_oconnell

sim dts example can be found on

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm/boot/dts/imx7d-sdb.dts?h=imx_5.4.47_2.2.0

One can test it on i.MX7D Sabre SD board with Demo Image i.MX 7Dual SABRESD

simple unit test

https://source.codeaurora.org/external/imx/imx-test/tree/test/mxc_sim_test?h=imx_5.4.47_2.2.0

Best regards
igor

Re: imx7 Sim Card Device Tree

eoin_oconnell — Tue, 03 Nov 2020 08:19:46 GMT

I found the issue, the port in the device tree needs to be defined as the port number -1. So for me SIM1 PORT2 needed to be defined as Port 1