Hello all,
I am trying to add the PCA 9535 expander on the i2c2 bus on P9. 23 and
P9.24 using the device tree but I cannot detect it when booting the board
with the kernel 4.1.15.
below the way I declare the device on the DTS.
Do you know what I am doing wrong?
&omap3_pmx_core {
pinctrl-names = "default";
pinctrl-0 = <
&hsusb2_pins
>;
i2c2_pins: pinmux_i2c_pins {
pinctrl-single,pins = <
0x18E (PIN_INPUT_PULLUP | MUX_MODE0) /*
i2c2_scl.gpio_168 */
0x190 (PIN_INPUT_PULLUP | MUX_MODE0) /*
i2c2_sda.gpio_136 */
>;
};
&i2c2 {
clock-frequency = <400000>;
pca9535: gpio@20 {
compatible = "nxp, pca9535";
gpio-controller;
#gpio-cell = <2>;
reg = <0x20>;
status = "okay";
};
gpio@21 {
compatible = "nxp, pca9535";
gpio-controller;
#gpio-cell = <2>;
reg = <0x21>;
status = "okay";
};
gpio@22 {
compatible = "nxp, pca9535";
gpio-controller;
status = "okay";
#gpio-cell = <2>;
reg = <0x22>;
};
gpio@24 {
compatible = "nxp, pca9535";
gpio-controller;
status = "okay";
#gpio-cell = <2>;
reg = <0x24>;
};
};
&gpio5 {
pinctrl-names = "defaults";
pinctrl-0 = <
&gpio_pins
&i2c2_pins
>;
};
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