v2: - Add note on what "phram" means in binding. - Use /schemas/mtd/mtd.yaml instead of relative pathUse /schemas/mtd/mtd.yaml instead of relative path in binding. The phram driver in the MTD subsystem can be used to allow the kernel to use an MTD or (via mtdblock) a block device in RAM (with the contents loaded by a bootloader for example). This series has some improvements to make it more usable by adding device tree support and to significantly improve its performance by using cached mappings when possible. I use this feature to pass the rootfs to the kernel when booting from RAM. The boot is much faster and requires less memory than initrd (which is on top of that being deprecated), and it allows the same disk images to be used when booting from RAM, unlike initramfs. Cc: linux-mtd@xxxxxxxxxxxxxxxxxxx Cc: devicetree@xxxxxxxxxxxxxxx Cc: robh+dt@xxxxxxxxxx Cc: krzk+dt@xxxxxxxxxx Cc: frowand.list@xxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Vincent Whitchurch (4): mtd: core: Check devicetree alias for index dt-bindings: reserved-memory: Add phram mtd: phram: Allow probing via reserved-memory mtd: phram: Allow cached mappings .../bindings/reserved-memory/phram.yaml | 47 +++++++++++ drivers/mtd/devices/phram.c | 78 +++++++++++++++++-- drivers/mtd/mtdcore.c | 11 ++- drivers/of/platform.c | 1 + 4 files changed, 129 insertions(+), 8 deletions(-) create mode 100644 Documentation/devicetree/bindings/reserved-memory/phram.yaml -- 2.34.1
