Hi Team,
I am trying to communicate with I2C devices i.e., temperature sensors and LED Driver but when I run "I2Cdetect -l " I could not see both devices getting detected.
Could you please let me know what changes I need to do to access both devices.
I am using default image available in https://www.ti.com/tool/PROCESSOR-SDK-AM62X.
Regards,
Kumar Ashutosh
Hi Ashutosh,
This is my understanding of why SoC_I2C1 is not showing temperature sensors at slave address set to 0x48 and 0x49.
I am attaching here a segment of how SoC_I2C1 is defined in the device tree files.
&main_i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&main_i2c1_pins_default>;
clock-frequency = <100000>;
exp1: gpio@22 {
compatible = "ti,tca6424";
reg = <0x22>;
gpio-controller;
#gpio-cells = <2>;
gpio-line-names = "GPIO_CPSW2_RST", "GPIO_CPSW1_RST",
"PRU_DETECT", "MMC1_SD_EN",
"VPP_LDO_EN", "EXP_PS_3V3_En",
"EXP_PS_5V0_En", "EXP_HAT_DETECT",
"GPIO_AUD_RSTn", "GPIO_eMMC_RSTn",
"UART1_FET_BUF_EN", "WL_LT_EN",
"GPIO_HDMI_RSTn", "CSI_GPIO1",
"CSI_GPIO2", "PRU_3V3_EN",
"HDMI_INTn", "TEST_GPIO2",
"MCASP1_FET_EN", "MCASP1_BUF_BT_EN",
"MCASP1_FET_SEL", "UART1_FET_SEL",
"TSINT#", "IO_EXP_TEST_LED";
interrupt-parent = <&main_gpio1>;
interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
interrupt-controller;
#interrupt-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
};
sii9022: sii9022@3b {
#sound-dai-cells = <0>;
compatible = "sil,sii9022";
reg = <0x3b>;
clocks = <&hdmi_mstrclk>;
clock-names = "mclk";
interrupt-parent = <&exp1>;
interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
sil,i2s-data-lanes = < 0 >;
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
sii9022_in: endpoint {
remote-endpoint = <&dpi1_out>;
};
};
port@1 {
reg = <1>;
sii9022_out: endpoint {
remote-endpoint = <&hdmi_connector_in>;
};
};
};
};
tlv320aic3106: audio-codec@1b {
#sound-dai-cells = <0>;
compatible = "ti,tlv320aic3106";
reg = <0x1b>;
ai3x-micbias-vg = <1>; /* 2.0V */
status = "okay";
/* Regulators */
AVDD-supply = <&vcc_3v3_sys>;
IOVDD-supply = <&vcc_3v3_sys>;
DRVDD-supply = <&vcc_3v3_sys>;
DVDD-supply = <&vcc_1v8>;
};
};
So the above declaration states that considering I2C1 bus, only three such slaves will be addressed/detected. They are 0x22, 0x3b and 0x1b
And the rest we need to add if we want to probe them.
As far as wakeup I2C0 is concerned I would suggest you to make the node enabled.
This can be done by stating status to "okay"
To further comment on SoC_I2C1 please wait for comments from the assigned expert.
Regards,
Vaibhav