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i2c-mux and i2c-pwm overlay updates for alternate i2c buses #5443

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Apr 24, 2023
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i2c-mux and i2c-pwm overlay updates for alternate i2c buses #5443

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fed9422
dtoverlays: Add overrides for alternate i2c buses to i2c-mux
6by9 Apr 24, 2023
2792815
dtoverlays: Add overrides for alternate i2c buses to i2c-pwm-pva9685a
6by9 Apr 24, 2023
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26 changes: 26 additions & 0 deletions arch/arm/boot/dts/overlays/README
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Original file line number Diff line number Diff line change
Expand Up @@ -1833,6 +1833,22 @@ Params: pca9542 Select the NXP PCA9542 device

addr Change I2C address of the device (default 0x70)

i2c0 Choose the I2C0 bus on GPIOs 0&1

i2c_csi_dsi Choose the I2C0 bus on GPIOs 44&45

i2c3 Choose the I2C3 bus (configure with the i2c3
overlay - BCM2711 only)

i2c4 Choose the I2C3 bus (configure with the i2c3
overlay - BCM2711 only)

i2c5 Choose the I2C5 bus (configure with the i2c4
overlay - BCM2711 only)

i2c6 Choose the I2C6 bus (configure with the i2c6
overlay - BCM2711 only)


[ The i2c-mux-pca9548a overlay has been deleted. See i2c-mux. ]

Expand All @@ -1841,6 +1857,16 @@ Name: i2c-pwm-pca9685a
Info: Adds support for an NXP PCA9685A I2C PWM controller on i2c_arm
Load: dtoverlay=i2c-pwm-pca9685a,<param>=<val>
Params: addr I2C address of PCA9685A (default 0x40)
i2c0 Choose the I2C0 bus on GPIOs 0&1
i2c_csi_dsi Choose the I2C0 bus on GPIOs 44&45
i2c3 Choose the I2C3 bus (configure with the i2c3
overlay - BCM2711 only)
i2c4 Choose the I2C3 bus (configure with the i2c3
overlay - BCM2711 only)
i2c5 Choose the I2C5 bus (configure with the i2c4
overlay - BCM2711 only)
i2c6 Choose the I2C6 bus (configure with the i2c6
overlay - BCM2711 only)


Name: i2c-rtc
Expand Down
40 changes: 37 additions & 3 deletions arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
compatible = "brcm,bcm2835";

fragment@0 {
target = <&i2c_arm>;
target = <&i2cbus>;
__dormant__ {
#address-cells = <1>;
#size-cells = <0>;
Expand All @@ -34,7 +34,7 @@
};

fragment@1 {
target = <&i2c_arm>;
target = <&i2cbus>;
__dormant__ {
#address-cells = <1>;
#size-cells = <0>;
Expand Down Expand Up @@ -71,7 +71,7 @@
};

fragment@2 {
target = <&i2c_arm>;
target = <&i2cbus>;
__dormant__ {
#address-cells = <1>;
#size-cells = <0>;
Expand Down Expand Up @@ -127,6 +127,27 @@
};
};

frag100: fragment@100 {
target = <&i2c_arm>;
i2cbus: __overlay__ {
status = "okay";
};
};

fragment@101 {
target = <&i2c0if>;
__dormant__ {
status = "okay";
};
};

fragment@102 {
target = <&i2c0mux>;
__dormant__ {
status = "okay";
};
};

__overrides__ {
pca9542 = <0>, "+0";
pca9545 = <0>, "+1";
Expand All @@ -135,5 +156,18 @@
addr = <&pca9542>,"reg:0",
<&pca9545>,"reg:0",
<&pca9548>,"reg:0";

i2c0 = <&frag100>, "target:0=",<&i2c0>,
<0>,"+101+102";
i2c_csi_dsi = <&frag100>, "target:0=",<&i2c_csi_dsi>,
<0>,"+101+102";
i2c3 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c3";
i2c4 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c4";
i2c5 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c5";
i2c6 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c6";
};
};
37 changes: 36 additions & 1 deletion arch/arm/boot/dts/overlays/i2c-pwm-pca9685a-overlay.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
compatible = "brcm,bcm2835";

fragment@0 {
target = <&i2c_arm>;
target = <&i2cbus>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
Expand All @@ -20,7 +20,42 @@
};
};
};


frag100: fragment@100 {
target = <&i2c_arm>;
i2cbus: __overlay__ {
status = "okay";
};
};

fragment@101 {
target = <&i2c0if>;
__dormant__ {
status = "okay";
};
};

fragment@102 {
target = <&i2c0mux>;
__dormant__ {
status = "okay";
};
};

__overrides__ {
addr = <&pca>,"reg:0";
i2c0 = <&frag100>, "target:0=",<&i2c0>,
<0>,"+101+102";
i2c_csi_dsi = <&frag100>, "target:0=",<&i2c_csi_dsi>,
<0>,"+101+102";
i2c3 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c3";
i2c4 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c4";
i2c5 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c5";
i2c6 = <&frag100>, "target?=0",
<&frag100>, "target-path=i2c6";
};
};