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