40 lines
1014 B
Plaintext
40 lines
1014 B
Plaintext
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I2C bus that tunnels through the ChromeOS EC (cros-ec)
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======================================================
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On some ChromeOS board designs we've got a connection to the EC (embedded
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controller) but no direct connection to some devices on the other side of
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the EC (like a battery and PMIC). To get access to those devices we need
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to tunnel our i2c commands through the EC.
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The node for this device should be under a cros-ec node like google,cros-ec-spi
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or google,cros-ec-i2c.
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Required properties:
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- compatible: google,cros-ec-i2c-tunnel
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- google,remote-bus: The EC bus we'd like to talk to.
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Optional child nodes:
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- One node per I2C device connected to the tunnelled I2C bus.
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Example:
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cros-ec@0 {
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compatible = "google,cros-ec-spi";
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...
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i2c-tunnel {
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compatible = "google,cros-ec-i2c-tunnel";
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#address-cells = <1>;
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#size-cells = <0>;
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google,remote-bus = <0>;
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battery: sbs-battery@b {
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compatible = "sbs,sbs-battery";
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reg = <0xb>;
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sbs,poll-retry-count = <1>;
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};
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};
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}
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