29 lines
1.4 KiB
Plaintext
29 lines
1.4 KiB
Plaintext
Embedded Power Measurement(EPM) using Cypress Progammable System on a chip (PSOC)
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The EPM using the PSoC5 is used by clients to measure on target power
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measurement on supported channels. The PSoC5 is a microcontroller
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that is communicated over the SPI from the MSM. Primary configuration
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supports upto 31 channels and the scope of the driver is to support
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userspace clients.
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EPM node
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Required properties:
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- compatible : should be "cy,epm-adc-cy8c5568lti-114" for EPM using PSoC5.
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- reg : chip select for the device.
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- interrupt-parent : should be phandle of the interrupt controller
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servicing the interrupt for this device.
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- spi-max-frequency : existing support is set for 960kHz.
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- qcom,channels : The number of voltage and current channels that
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are supported.
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- qcom,gain : The gain for each of the supported channels.
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- qcom,rsense : The rsense value for each channel. The current channels
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rsense values units are in milliohms. The voltage channels
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rsense value is 1.
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- qcom,channel-type : Bitmak of channels to set as voltage and current.
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These are platform dependent and the appropriate scaling
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functions are used for returning voltage and current.
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- qcom,<gpio-name>-gpio : Handle to the GPIO node, see "gpios property" in
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Documentation/devicetree/bindings/gpio/gpio.txt.
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"gpio-name" can be "epm-enable" which is the EPM global enable GPIO for powering up the PSoC.
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