Linux 5.9 has not been released. While this changelog is completed, you can read about this release here:
Phoronix Linux 5.9 feature overview
or take a look at these pull requests:
1. PHY ("physical layer" framework)
bcm63xx-usbh: Add BCM63xx USBH driver commit
qcom-qmp: Add USB QMP PHY support for IPQ8074 commit
qcom: remove ufs qmp phy driver commit
qualcomm: add qcom ipq806x dwc usb phy driver commit
samsung-ufs: add UFS PHY driver for samsung SoC commit
zynqmp: Add PHY driver for the Xilinx ZynqMP Gigabit Transceiver commit
2. Memory Controller Drivers
Add Renesas RPC-IF driver commit
mtk-smi: Add basic support for MT6779 commit
samsung: exynos5422-dmc: Add module param to control IRQ mode commit
stm32-fmc2-ebi: add STM32 FMC2 EBI controller driver commit
tegra: Add EMC scaling sequence code for Tegra210 commit
tegra: Add EMC scaling support code for Tegra210 commit
3. Firmware Drivers
arm_scmi: SCMI Notifications Core Support commit, commit, commit, commit, commit, commit, commit, commit, commit
Extend svc and rsu drivers for new RSU features commit, commit, commit, commit
smccc: Add ARCH_SOC_ID support commit
tegra: Add support for in-band debug commit
turris-mox-rwtm: support ECDSA signatures via debugfs commit
4. Remote Processors
Add coredump debugfs entry commit
k3-dsp: Add a remoteproc driver of K3 C66x DSPs commit
k3-dsp: Add support for C71x DSPs commit
k3-dsp: Add support for L2RAM loading on C66x DSPs commit
k3: Add TI-SCI processor control helper functions commit
5. Various
bus: fsl-mc: Add ACPI support for fsl-mc commit
counter: Add microchip TCB capture counter commit
fpga: Add interrupt support to FPGA DFL drivers commit, commit, commit, commit, commit, commit, commit
fpga: dfl: pci: add device id for Intel FPGA PAC N3000 commit
iommu: NVIDIA ARM SMMU Implementation commit, commit, commit, commit, commit
iommu/mediatek: Add mt6779 basic support commit
iommu/renesas: Add support for r8a77961 commit
irqchip/imx-intmux: Implement intmux runtime power management commit
misc: mei: add device kind to sysfs commit
misc: rtsx: Add support new chip rts5228 mmc: rtsx: Add support MMC_CAP2_NO_MMC commit
nvmem: enables blowing of fuses on Qualcomm SoCs commit, commit, commit, commit
nvmem: sc27xx: add sc2730 efuse support commit
ocxl: control via sysfs whether the FPGA is reloaded on a link reset commit
vdpasim: support batch updating commit
6. List of Pull Requests