Can not update pin mux ?

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Hi Everyone,

I try to compile a cape but I can’t change pinmux, does anyone have the same situation ?
It’s already loaded on SLOT but not doing the job :
root@beaglebone:/lib/firmware# cat $SLOTS
0: PF---- -1
1: PF---- -1
2: PF---- -1
3: PF---- -1
4: P-O-L- 0 Override Board Name,00A0,Override Manuf,cape-universal
5: P-O-L- 1 Override Board Name,00A0,Override Manuf,EBB-GPIO-Example
root@beaglebone:/lib/firmware#
dmesg :
5: P-O-L- 1 Override Board Name,00A0,Override Manuf,EBB-GPIO-Example
root@beaglebone:/lib/firmware# dmesg | grep EBB
[ 706.990227] bone_capemgr bone_capemgr: part_number ‘EBB-GPIO-Example’, version ‘N/A’
[ 706.990330] bone_capemgr bone_capemgr: slot #5: ‘Override Board Name,00A0,Override Manuf,EBB-GPIO-Example’
[ 707.028392] pinctrl-single 44e10800.pinmux: could not request pin 28 (44e10870.0) from group EBB_GPIO_Example on device pinctrl-single
[ 707.139290] pinctrl-single 44e10800.pinmux: could not request pin 28 (44e10870.0) from group EBB_GPIO_Example on device pinctrl-single
[ 707.168352] bone_capemgr bone_capemgr: slot #5: dtbo ‘EBB-GPIO-Example-00A0.dtbo’ loaded; overlay id #1
root@beaglebone:/lib/firmware#

code :
/dts-v1/;
/plugin/;

/{
compatible = “ti,beaglebone”, “ti,beaglebone-black”;
part-number = “EBB-GPIO-Example”;
version = “00A0”;

fragment@0 {
target = <&am33xx_pinmux>;

overlay {
ebb_example: EBB_GPIO_Example {
pinctrl-single,pins = <
0x070 0x07 // P9_11 PINS$28 GPIO0_30 = 30 Output Mode7 pulldown
0x074 0x37 // P9_13 PINS$29 GPIO0_31 = 31 Input Mode7 pullup

/* OUTPUT GPIO(mode7) 0x07 pulldown, 0x17 pullup, 0x?f no pullup/down /
/ INPUT GPIO(mode7) 0x27 pulldown, 0x37 pullup, 0x?f no pullup/down */

;
};
};
};

Thanks