64 lines
2.4 KiB
Plaintext
64 lines
2.4 KiB
Plaintext
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Msm Machine Name
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Machine name is used to:
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1. show up in the beginning of kernel message.
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Example:
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[ 0.000000] Machine: Qualcomm Technologies, Inc. MSM8953 PMI8950 MTP
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2. show up as arch description when do dump stack.
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Example:
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[ 1.222319] WARNING: CPU: 2 PID: 1 at kernel/lib/debugobjects.c:263 debug_print_object+0xa8/0xb0
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[ 1.222334] Modules linked in:
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[ 1.222362] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.9.65+ #71
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[ 1.222376] Hardware name: Qualcomm Technologies, Inc. MSM8953 PMI8950 MTP (DT)
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[ 1.222392] task: ffffffc0ed1b0080 task.stack: ffffffc0ed1b8000
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[ 1.222408] PC is at debug_print_object+0xa8/0xb0
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[ 1.222424] LR is at debug_print_object+0xa8/0xb0
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Msm machine name is a string concatenated from:
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1. constant string contain msm information: "Qualcomm Technologies, Inc.".
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2. string of device tree property "qcom,msm-name".
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3. string of device tree property "qcom,pmic-name".
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4. string of device tree property "model".
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The reason for using msm machine Name is single board overlay device tree
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may applied to multiple soc device trees. The "model" property in soc device
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tree is overwritten with board overlay device tree. So the final string in
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"model" property can only contain Board information. And "qcom,msm-name"
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and "qcom,pmic-name" property is introduced.
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Optional properties:
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- qcom,msm-name: The name string of MSM SoC chip
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- qcom,pmic-name: The name string of MSM Pmic chip
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Required properties:
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- model: in soc device tree
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Contain the soc and pmic information.
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Will be overwritten by model string in board overlay device tree.
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It will be used in bootloader for debug purpose.
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- model: in board overlay device tree
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Contain the board information. It is the final model string that
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kernel can see.
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Note:
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When device tree property qcom,msm-name and qcom,pmic-name exist, it will
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use concatenated msm machine name string for final machine name.
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When device tree property qcom,msm-name and qcom,pmic-name doesn't exist,
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it will use model property string for final machine name.
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Example:
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* In soc device tree:
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/ {
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model = "Qualcomm Technologies, Inc. APQ 8953 + PMI8950 SOC";
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compatible = "qcom,apq8053";
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qcom,pmic-id = <0x010016 0x010011 0x0 0x0>;
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qcom,pmic-name = "PMI8950";
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qcom,msm-id = <293 0x0>;
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qcom,msm-name = "APQ8053";
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};
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* In board overlay device tree:
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/ {
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model = "MTP";
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compatible = "qcom,mtp";
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};
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