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Keypad-driver throwing error

Question asked by Purvi Billore on Sep 27, 2019
Latest reply on Sep 30, 2019 by Purvi Billore

Hello,

I am using 3x2 keypad and below is my interfacing of keypad with iMX-6 and part of dtsi file:

where the interfacing with rows are like:

                                                   KEY_ROW0

                                                   KEY_ROW2

and where the interfacing with columns are like:                                               

                                                   KEY_COL0

                                                   KEY_COL2

                                                   KEY_COL4


&kpp {
compatible = "fsl,imx6q-kpp", "fsl,imx21-kpp";
clocks = <&clks IMX6QDL_CLK_IPG>;
pinctrl-0 = <&pinctrl_kpp>;
linux,keymap = <

MATRIX_KEY(0x0, 0x0, KEY_U) //ROW0 COL0 UP
MATRIX_KEY(0x0, 0x2, KEY_D) //ROW0 COL2 DOWN
MATRIX_KEY(0x0, 0x4, KEY_E) //ROW0 COL4 ENTER
MATRIX_KEY(0x2, 0x0, KEY_C) //ROW2 COL0 ESC
MATRIX_KEY(0x2, 0x2, KEY_R) //ROW2 COL2 RIGHT
MATRIX_KEY(0x2, 0x4, KEY_L) //ROW2 COL4 LEFT
>;
keypad,num-rows = <2>;
keypad,num-columns = <3>;

};

pinctrl_kpp:kpp_grp_1{
fsl,pins = <

 

 


MX6QDL_PAD_KEY_COL0__KEY_COL0 0x80000000
MX6QDL_PAD_KEY_ROW0__KEY_ROW0 0x80000000
MX6QDL_PAD_KEY_COL2__KEY_COL2 0x80000000
MX6QDL_PAD_KEY_ROW2__KEY_ROW2 0x80000000
MX6QDL_PAD_KEY_COL4__KEY_COL4 0x80000000
>;
};

 

On boot, keypad driver is throwing an error:
                                                "too many keys pressed, control pins initialisation"

Can someone state me the changes I have to do and solution of the problem.

 

Thanks and Regards,

Purvi

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