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* Qualcomm Technologies, Inc. MSM FLASH
The MSM camera Flash driver provides the definitions for
enabling and disabling LED Torch/Flash by requesting it to
PMIC/I2C/GPIO based hardware. It provides the functions for
the Client to control the Flash hardware.
=======================================================
Required Node Structure
=======================================================
The Flash device is described in one level of the device node.
======================================
First Level Node - CAM FLASH device
======================================
- compatible
Usage: required
Value type: <string>
Definition: Should be "qcom,camera-flash".
- cell-index
Usage: required
Value type: <u32>
Definition: Should specify the hardware index id.
- reg
Usage: required
Value type: <u32>
Definition: Register values.
- flash-source
Usage: required
Value type: <phandle>
Definition: Should contain array of phandles to Flash source nodes.
- torch-source
Usage: required
Value type: <phandle>
Definition: Should contain array of phandles to torch source nodes.
- switch-source
Usage: Optional
Value type: <phandle>
Definition: Should contain phandle to switch source nodes.
- slave-id
Usage: optional
Value type: <u32>
Definition: should contain i2c slave address, device id address
and expected id read value.
- cci-master
Usage: optional
Value type: <u32>
Definition: should contain i2c master id to be used for this camera
flash.
- max-current
Usage: optional
Value type: <u32>
Definition: Max current in mA supported by flash
- max-duration
Usage: optional
Value type: <u32>
Definition: Max duration in ms flash can glow.
- wled-flash-support
Usage: optional
Value type: <boolean>
Definition: To identity wled flash hardware support.
- gpios
Usage: optional
Value type: <u32>
Definition: should specify the gpios to be used for the flash.
- gpio-req-tbl-num
Usage: optional
Value type: <u32>
Definition: should specify the gpio table index.
- gpio-req-tbl-flags
Usage: optional
Value type: <u32>
Definition: should specify the gpio functions.
- gpio-req-tbl-label
Usage: optional
Value type: <u32>
Definition: should specify the gpio labels.
- gpio-flash-reset
Usage: optional
Value type: <u32>
Definition: should contain index to gpio used by flash's "flash reset" pin.
- gpio-flash-en
Usage: optional
Value type: <u32>
Definition: should contain index to gpio used by flash's "flash enable" pin.
- gpio-flash-now
Usage: optional
Value type: <u32>
Definition: should contain index to gpio used by flash's "flash now" pin.
Example:
led_flash_rear: qcom,camera-flash@0 {
reg = <0x00 0x00>;
cell-index = <0>;
compatible = "qcom,camera-flash";
flash-source = <&pmi8998_flash0 &pmi8998_flash1>;
torch-source = <&pmi8998_torch0 &pmi8998_torch1>;
switch-source = <&pmi8998_switch0>;
wled-flash-support;
qcom,slave-id = <0x00 0x00 0x0011>;
qcom,cci-master = <0>;
gpios = <&msmgpio 23 0>,
<&msmgpio 24 0>;
<&msmgpio 25 0>;
qcom,gpio-flash-reset = <0>;
qcom,gpio-flash-en = <0>;
qcom,gpio-flash-now = <1>;
qcom,gpio-req-tbl-num = <0 1>;
qcom,gpio-req-tbl-flags = <0 0>;
qcom,gpio-req-tbl-label = "FLASH_EN",
"FLASH_NOW";
qcom,max-current = <1500>;
qcom,max-duration = <1200>;
};
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