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To understand the driver requirements of the MSM8953, one must first understand the hardware it was designed to support. The MSM8953 was a pioneering chip for the Arm64 instruction set. Manufactured on a 14nm FinFET process—a first for the mid-range segment—it featured an octa-core Cortex-A53 CPU configuration. msm8953 for arm64 driver
: Most MSM8953 devices will not receive official updates, but custom ROMs will switch to Project Sandcastle or postmarketOS (mainline Linux). This means replacing all Qualcomm proprietary blobs with open drivers (e.g., msm-fb-refresher for display, libopen-codec for audio).
The pinctrl-msm8953 driver manages the 142 General Purpose Input/Output pins. This is the first driver initialized to allow communication with external sensors or buttons. To understand the driver requirements of the MSM8953,
Base your .dts on qcom-msm8953.dtsi from the mainline kernel (it exists but is minimal). You will need to copy bindings from the CAF kernel’s arch/arm64/boot/dts/qcom/ .
Getting a functional ARM64 driver stack on the MSM8953 requires moving away from the "downstream" (Android-specific) 3.18 or 4.9 kernels and toward the (current stable releases). 1. Device Tree (DT) Configuration : Most MSM8953 devices will not receive official
To run a modern Linux kernel (5.x or 6.x) instead of the heavily patched Android 3.18/4.9 kernels these devices shipped with, specialized are required for all these subsystems. 2. The Current State of MSM8953 ARM64 Drivers (Mainline)
Thus, in mainline Linux is a work in progress.
The MSM8953 functions through a highly modular upstream and downstream Linux kernel infrastructure. Downstream kernels (provided by Qualcomm/OEMs, typically versions 3.18, 4.9, or 4.19) rely on proprietary Android drivers. The mainline Linux kernel (versions 5.x and 6.x) implements open-source alternatives. Driver Subsystems and Core Components
To understand the driver requirements of the MSM8953, one must first understand the hardware it was designed to support. The MSM8953 was a pioneering chip for the Arm64 instruction set. Manufactured on a 14nm FinFET process—a first for the mid-range segment—it featured an octa-core Cortex-A53 CPU configuration.
: Most MSM8953 devices will not receive official updates, but custom ROMs will switch to Project Sandcastle or postmarketOS (mainline Linux). This means replacing all Qualcomm proprietary blobs with open drivers (e.g., msm-fb-refresher for display, libopen-codec for audio).
The pinctrl-msm8953 driver manages the 142 General Purpose Input/Output pins. This is the first driver initialized to allow communication with external sensors or buttons.
Base your .dts on qcom-msm8953.dtsi from the mainline kernel (it exists but is minimal). You will need to copy bindings from the CAF kernel’s arch/arm64/boot/dts/qcom/ .
Getting a functional ARM64 driver stack on the MSM8953 requires moving away from the "downstream" (Android-specific) 3.18 or 4.9 kernels and toward the (current stable releases). 1. Device Tree (DT) Configuration
To run a modern Linux kernel (5.x or 6.x) instead of the heavily patched Android 3.18/4.9 kernels these devices shipped with, specialized are required for all these subsystems. 2. The Current State of MSM8953 ARM64 Drivers (Mainline)
Thus, in mainline Linux is a work in progress.
The MSM8953 functions through a highly modular upstream and downstream Linux kernel infrastructure. Downstream kernels (provided by Qualcomm/OEMs, typically versions 3.18, 4.9, or 4.19) rely on proprietary Android drivers. The mainline Linux kernel (versions 5.x and 6.x) implements open-source alternatives. Driver Subsystems and Core Components