Hello Folks!
I am trying to understand the device tree file of imx8mmevk board because I intend to make a change in the imx8mm-evk.dts file. At the file "fsl,imx8mm-pinctrl.txt" I saw that "fsl,pins" field has the format <PIN_FUNC_ID CONFIG>. The PIN_FUNC_ID field, I found at imx8mm-pinfunc.h file and the CONFIG field I found at "i.MX8M Mini Applications Processor Reference Manual, Rev. 2, 08/2019" document.
From "i.MX8M Mini Applications Processor Reference Manual, Rev. 2, 08/2019" document the CONFIG value has 9 bits. Like the example below
pinctrl_csi_rst: csi_rst_grp {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO06_GPIO1_IO6 0x19
MX8MM_IOMUXC_GPIO1_IO14_CCMSRCGPCMIX_CLKO1 0x59
>;
};
pinctrl_ir_recv: ir-recv {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO13_GPIO1_IO13 0x4f
>;
};
I would like to understand why the I2C pins doesn't use the same syntax of the other pins. Look the example below
pinctrl_i2c1: i2c1grp {
fsl,pins = <
MX8MM_IOMUXC_I2C1_SCL_I2C1_SCL 0x400001c3
MX8MM_IOMUXC_I2C1_SDA_I2C1_SDA 0x400001c3
>;
};
pinctrl_i2c2: i2c2grp {
fsl,pins = <
MX8MM_IOMUXC_I2C2_SCL_I2C2_SCL 0x400001c3
MX8MM_IOMUXC_I2C2_SDA_I2C2_SDA 0x400001c3
>;
};
pinctrl_i2c3: i2c3grp {
fsl,pins = <
MX8MM_IOMUXC_I2C3_SCL_I2C3_SCL 0x400001c3
MX8MM_IOMUXC_I2C3_SDA_I2C3_SDA 0x400001c3
>;
};
Does anybody can explain why I2C pin doesn't use the same form of the other pins at the device tree file?
Thanks in advance.
