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* Qualcomm Technologies, Inc. MSM Camera JPEG
The MSM camera JPEG devices are implemented multiple device nodes.
The root JPEG device node has properties defined to hint the driver
about the number of Encoder and DMA nodes available during the
probe sequence. Each node has multiple properties defined
for interrupts, clocks and regulators.
=======================
Required Node Structure
=======================
JPEG root interface node takes care of the handling account for number
of Encoder and DMA devices present on the hardware.
- compatible
Usage: required
Value type: <string>
Definition: Should be "qcom,cam-jpeg".
- compat-hw-name
Usage: required
Value type: <string>
Definition: Should be "qcom,jpegenc" or "qcom,jpegdma".
- num-jpeg-enc
Usage: required
Value type: <u32>
Definition: Number of supported Encoder HW blocks.
- num-jpeg-dma
Usage: required
Value type: <u32>
Definition: Number of supported DMA HW blocks.
Example:
qcom,cam-jpeg {
compatible = "qcom,cam-jpeg";
compat-hw-name = "qcom,jpegenc",
"qcom,jpegdma";
num-jpeg-enc = <1>;
num-jpeg-dma = <1>;
status = "ok";
};
=======================
Required Node Structure
=======================
Encoder/DMA Nodes provide interface for JPEG driver about
the device register map, interrupt map, clocks and regulators.
- cell-index
Usage: required
Value type: <u32>
Definition: Node instance number.
- compatible
Usage: required
Value type: <string>
Definition: Should be "qcom,cam_jpeg_enc".
- reg-names
Usage: optional
Value type: <string>
Definition: Name of the register resources.
- reg
Usage: optional
Value type: <u32>
Definition: Register values.
- reg-cam-base
Usage: optional
Value type: <u32>
Definition: Offset of the register space compared to
to Camera base register space.
- interrupt-names
Usage: optional
Value type: <string>
Definition: Name of the interrupt.
- interrupts
Usage: optional
Value type: <u32>
Definition: Interrupt associated with JPEG HW.
- regulator-names
Usage: required
Value type: <string>
Definition: Name of the regulator resources for JPEG HW.
- camss-vdd-supply
Usage: required
Value type: <phandle>
Definition: Regulator reference corresponding to the names listed
in "regulator-names".
- clock-names
Usage: required
Value type: <string>
Definition: List of clock names required for JPEG HW.
- clocks
Usage: required
Value type: <phandle>
Definition: List of clocks used for JPEG HW.
- clock-rates
Usage: required
Value type: <u32>
Definition: List of clocks rates.
- src-clock-name
Usage: required
Value type: <string>
Definition: Source clock name.
- clock-cntl-level
Usage: required
Value type: <string>
Definition: List of strings corresponds clock-rates levels.
Supported strings: minsvs, lowsvs, svs, svs_l1, nominal, turbo.
Examples:
cam_jpeg_enc: qcom,jpegenc@ac4e000 {
cell-index = <0>;
compatible = "qcom,cam_jpeg_enc";
reg-names = "jpege_hw";
reg = <0xac4e000 0x4000>;
reg-cam-base = <0x4e000>;
interrupt-names = "jpeg";
interrupts = <0 474 0>;
regulator-names = "camss-vdd";
camss-vdd-supply = <&titan_top_gdsc>;
clock-names = "camera_ahb",
"camera_axi",
"soc_ahb_clk",
"cpas_ahb_clk",
"camnoc_axi_clk",
"jpegenc_clk_src",
"jpegenc_clk";
clocks = <&clock_gcc GCC_CAMERA_AHB_CLK>,
<&clock_gcc GCC_CAMERA_AXI_CLK>,
<&clock_camcc CAM_CC_SOC_AHB_CLK>,
<&clock_camcc CAM_CC_CPAS_AHB_CLK>,
<&clock_camcc CAM_CC_CAMNOC_AXI_CLK>,
<&clock_camcc CAM_CC_JPEG_CLK_SRC>,
<&clock_camcc CAM_CC_JPEG_CLK>;
clock-rates = <0 0 0 0 0 600000000 0>;
src-clock-name = "jpegenc_clk_src";
clock-cntl-level = "nominal";
status = "ok";
};
cam_jpeg_dma: qcom,jpegdma@0xac52000{
cell-index = <0>;
compatible = "qcom,cam_jpeg_dma";
reg-names = "jpegdma_hw";
reg = <0xac52000 0x4000>;
reg-cam-base = <0x52000>;
interrupt-names = "jpegdma";
interrupts = <0 475 0>;
regulator-names = "camss-vdd";
camss-vdd-supply = <&titan_top_gdsc>;
clock-names = "camera_ahb",
"camera_axi",
"soc_ahb_clk",
"cpas_ahb_clk",
"camnoc_axi_clk",
"jpegdma_clk_src",
"jpegdma_clk";
clocks = <&clock_gcc GCC_CAMERA_AHB_CLK>,
<&clock_gcc GCC_CAMERA_AXI_CLK>,
<&clock_camcc CAM_CC_SOC_AHB_CLK>,
<&clock_camcc CAM_CC_CPAS_AHB_CLK>,
<&clock_camcc CAM_CC_CAMNOC_AXI_CLK>,
<&clock_camcc CAM_CC_JPEG_CLK_SRC>,
<&clock_camcc CAM_CC_JPEG_CLK>;
clock-rates = <0 0 0 0 0 600000000 0>;
src-clock-name = "jpegdma_clk_src";
clock-cntl-level = "nominal";
status = "ok";
};
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