Hi,
I'm using imx6 wandboard dual tried to configure spi1,
made device-tree changes:
-----------------------------------------------
...
&iomuxc {
...
ecspi1 {
pinctrl_ecspi1_cs: ecspi1cs {
fsl,pins = <
MX6QDL_PAD_EIM_EB2__ECSPI1_SS0 0x80000000
>;
};
pinctrl_ecspi1: ecspi1grp {
fsl,pins = <
MX6QDL_PAD_EIM_D17__ECSPI1_MISO 0x100b1
MX6QDL_PAD_EIM_D18__ECSPI1_MOSI 0x100b1
MX6QDL_PAD_EIM_D16__ECSPI1_SCLK 0x100b1
>;
};
};
...
...
&ecspi1 {
fsl,spi-num-chipselects = <1>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1 &pinctrl_ecspi1_cs>;
status = "okay";
spidev@0x01 {
compatible = "linux,lcd-st7565";
spi-max-frequency = <20000000>;
reg = <0x0>;
register-sel-gpio =<&gpio4 5 0>;
reset-gpio =<&gpio7 13 0>;
backlight-gpio =<&gpio3 26 0>;
status = "okay";
};
};
...
----------------------------------------------------------------
but while connecting the LCD to the SPI, its not working (lcd-st7565 driver for my LCD, which is working fine as i get all debug prints)on probing the SPI pins with oscilloscope confirmed data is coming but in some distorted manner (overshoot undershoot problem),
kernel version 3.14.28
oscilloscope probed : data line and clock
can anyone please guide me what is the reason for such a behavior..??
