Part Number: DRA77P
Tool/software: Linux
Hi,
We have followed few steps mentioned in e2e for enabling mmc3 interface in the dra76-evm.dts device tree file as the following,
&dra7_pmx_core {
mmc3_pins_default: mmc3_pins_default {
pinctrl-single,pins = <
0x37C (PIN_INPUT_PULLUP | MUX_MODE0) /* mmc3_clk.clk */
0x380 (PIN_INPUT_PULLUP | MUX_MODE0) /* mmc3_cmd.cmd */
0x384 (PIN_INPUT_PULLUP | MUX_MODE0) /* mmc3_dat0.dat0 */
0x388 (PIN_INPUT_PULLUP | MUX_MODE0) /* mmc3_dat1.dat1 */
0x38C (PIN_INPUT_PULLUP | MUX_MODE0) /* mmc3_dat2.dat2 */
0x390 (PIN_INPUT_PULLUP | MUX_MODE0) /* mmc3_dat3.dat3 */
>;
};
mmc3_pins_hs: mmc3_pins_hs {
pinctrl-single,pins = <
0x37C (PIN_INPUT_PULLUP | MUX_VIRTUAL_MODE11 | MUX_MODE0) /* mmc3_clk.clk */
0x380 (PIN_INPUT_PULLUP | MUX_VIRTUAL_MODE11 | MUX_MODE0) /* mmc3_cmd.cmd */
0x384 (PIN_INPUT_PULLUP | MUX_VIRTUAL_MODE11 | MUX_MODE0) /* mmc3_dat0.dat0 */
0x388 (PIN_INPUT_PULLUP | MUX_VIRTUAL_MODE11 | MUX_MODE0) /* mmc3_dat1.dat1 */
0x38C (PIN_INPUT_PULLUP | MUX_VIRTUAL_MODE11 | MUX_MODE0) /* mmc3_dat2.dat2 */
0x390 (PIN_INPUT_PULLUP | MUX_VIRTUAL_MODE11 | MUX_MODE0) /* mmc3_dat3.dat3 */
>;
};
};
&mmc3{
status = "okay";
vmmc-supply = <&vio_1v8>;
bus-width = <4>;
ti,non-removable;
max-frequency = <192000000>;
pinctrl-names = "default", "hs";
pinctrl-0 = <&mmc3_pins_default>;
pinctrl-1 = <&mmc3_pins_hs>;
clock-names = "fck", "clk32k";
clocks = <&mmc3_gfclk_div>, <&mmc3_clk32k>;
};
Also we have enabled it in the u-boot device tree also and was able to list the mmc3 device in u-boot.
In the kernel on inserting the command cat /sys/kernel/debug/mmc2/ios (mmc3 is listed as mmc2), the following is observed,
root@dra7xx-evm:~# cat /sys/kernel/debug/mmc2/ios clock: 0 Hz vdd: 0 (invalid) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 0 (off) bus width: 0 (1 bits) timing spec: 0 (legacy) signal voltage: 0 (1.80 V) driver type: 0 (driver type B)
We are using ti-processor-sdk-linux-automotive-dra7xx-evm-5_00_00_01.
What changes might be required for correcting this ?
Do we have any procedure in enabling the mmc3 in the sdk dra7xx-evm-5_00_00_01 ?
Regards,
Padmesh
