The MSM8953 relies heavily on the RPM for power management. A driver that simply enables a clock or regulator without notifying the RPM will fail when the system enters Low Power Modes (LPM).
To verify driver quality on your ARM64 target, integrate these into your workflow: Monitor the Qualcomm-specific interconnect frequencies. To ensure C-states are being reached. dmesg --level=err,warn msm8953 for arm64 driver high quality
Power efficiency
Developing for MSM8953 on the ARM64 architecture requires more than just making hardware work; it requires a deep understanding of the Linux kernel subsystems, power management specific to Qualcomm hardware, and the ARM64 memory model. The MSM8953 relies heavily on the RPM for power management
A high-quality MSM8953 for ARM64 driver typically includes the following features: To ensure C-states are being reached
: For ARM devices, a significant portion of the driver development and maintenance involves working with the Linux kernel, as it is an open-source project. Qualcomm and other companies contribute to the kernel to ensure their hardware is supported.
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); m->mmio = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(m->mmio)) return PTR_ERR(m->mmio);