3c51dd18f2
git-subtree-dir: qcom/camera git-subtree-mainline:8263fe365egit-subtree-split:a1378b76f0
164 lines
3.5 KiB
Plaintext
164 lines
3.5 KiB
Plaintext
* Qualcomm Technologies, Inc. MSM Camera CRE
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The cre device node has properties defined to hint the driver
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about the number of CRE nodes available during the
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probe sequence. Each node has multiple properties defined
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for interrupts, clocks and regulators.
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=======================
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Required Node Structure
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=======================
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CRE root interface node takes care of the handling account for number
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of CRE devices present on the hardware.
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- compatible
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Usage: required
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Value type: <string>
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Definition: Should be "qcom,cam-cre".
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- compat-hw-name
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Usage: required
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Value type: <string>
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Definition: Should be "qcom,cre".
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- num-cre
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Usage: required
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Value type: <u32>
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Definition: Number of supported CRE HW blocks.
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Example:
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qcom,cam-cre {
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compatible = "qcom,cam-cre";
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compat-hw-name = "qcom,cre";
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num-cre = <2>;
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status = "ok";
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};
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=======================
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Required Node Structure
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=======================
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CRE Node provides interface for Image Control Processor driver
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about the CRE register map, interrupt map, clocks, regulators.
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- cell-index
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Usage: required
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Value type: <u32>
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Definition: Node instance number.
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- compatible
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Usage: required
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Value type: <string>
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Definition: Should be "qcom,cre".
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- reg-names
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Usage: optional
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Value type: <string>
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Definition: Name of the register resources.
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- reg
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Usage: optional
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Value type: <u32>
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Definition: Register values.
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- reg-cam-base
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Usage: optional
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Value type: <u32>
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Definition: Register values.
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- interrupt-names
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Usage: optional
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Value type: <string>
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Definition: Name of the interrupt.
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- interrupts
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Usage: optional
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Value type: <u32>
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Definition: Interrupt associated with CRE HW.
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- regulator-names
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Usage: required
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Value type: <string>
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Definition: Name of the regulator resources for CRE HW.
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- camss-supply
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Usage: required
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Value type: <phandle>
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Definition: Regulator reference corresponding to the names listed
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in "regulator-names".
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- clock-names
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Usage: required
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Value type: <string>
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Definition: List of clock names required for CDM HW.
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- src-clock-name
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Usage: required
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Value type: <string>
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Definition: Source clock name.
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- clock-control-debugfs
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Usage: optional
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Value type: <string>
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Definition: Enable/Disable clk rate control.
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- clocks
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Usage: required
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Value type: <phandle>
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Definition: List of clocks used for CDM HW.
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- clock-cntl-level
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Usage: required
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Value type: <string>
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Definition: List of strings corresponds clock-rates levels.
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Supported strings: lowsvs, svs, svs_l1, nominal, turbo.
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- clock-rates
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Usage: required
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Value type: <u32>
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Definition: List of clocks rates.
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Examples:
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qcom,cam-cre {
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compatible = "qcom,cam-cre";
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compat-hw-name = "qcom,cre";
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num-cre = <1>;
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status = "ok";
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};
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cre: qcom,cre@ac00000 {
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cell-index = <0>;
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compatible = "qcom,cre";
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reg =
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<0xFA000 0x400>,
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<0xFA400 0xB0>,
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<0xFAB00 0x300>;
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reg-names =
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"cre_top",
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"cre_bus_rd",
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"cre_bus_wr";
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reg-cam-base = <0xFA000 0xFA400 0xFAB00>;
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interrupts = <GIC_SPI 463 IRQ_TYPE_EDGE_RISING>;
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interrupt-names = "cre";
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regulator-names = "camss-vdd";
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camss-vdd-supply = <&gcc_camss_top_gdsc>;
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clock-names =
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"cre_ahb_clk",
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"cre_clk_src",
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"cre_clk";
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clocks =
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<&gcc GCC_CAMSS_CRE_AHB_CLK>,
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<&gcc GCC_CAMSS_CRE_CLK_SRC>,
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<&gcc GCC_CAMSS_CRE_CLK>;
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clock-rates =
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<80000000 30000000 30000000>,
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<80000000 41000000 41000000>,
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<80000000 46000000 46000000>,
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<80000000 60000000 60000000>,
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<80000000 70000000 70000000>;
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clock-cntl-level = "lowsvs", "maxsvs", "svs", "nom", "turbo";
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src-clock-name = "cre_clk_src";
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status = "ok";
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};
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