On Mon, Feb 15, 2016 at 7:20 PM, Leo Yan <leo.yan@xxxxxxxxxx> wrote: > Hi6220 mailbox supports up to 32 channels. Each channel is unidirectional > with a maximum message size of 8 words. I/O is performed using register > access (there is no DMA) and the cell raises an interrupt when messages > are received. > > This patch series is to implement Hi6220 mailbox driver. It registers > two channels into framework for communication with MCU, one is tx channel > and another is rx channel. Now mailbox driver is used to send message to > MCU to control dynamic voltage and frequency scaling for CPU, GPU and DDR. > > Changes from v6: > * Fix to use lowercase for hexadecimal value in DT binding document > > Changes from v5: > * Refine to use mailbox three specifiers for client driver, so add xlate > callback function in mailbox driver to support these specifiers > * Refine document for property "hi6220,mbox-tx-noirq" > > Changes from v4: > * According to Jassi's suggestion, using DT binding to register channels > * Change to use operating-points-v2 to register operating points > > Changes from v3: > * The patch series for enabling idle state for Hi6220 has reserved memory > regions, so this series will not include it anymore > * Refined mailbox driver according to Jassi's suggestion; > Removed kfifo from mailbox driver; > Removed spinlock for ipc registers accessing, due every channel has its > own dedicated bit in ipc register and readl/writel will introduce memory > barrier, so don't need spinlock to protect ipc registers accessing > * After mailbox driver is ready, can use patch 4 to enable CPU's OPPs and > stub clock driver; finally can enable CPUFreq driver for CPU frequency > scaling > > Changes from v2: > * Get rid of unused memory regions from memory node in DT, and don't use > reserved-memory node according to Mark and Leif's suggestion; Haojian also > has updated UEFI for efi memory info > > Changes from v1: > * Correct lock usage for SMP scenario > > Changes from RFC: > * According to Jassi's review, totally remove the abstract common driver > layer and only commit driver dedicated for Hi6220 > * According to Paul Bolle's review, fix typo issue for Kconfig and remove > unnecessary dependency with OF and fix minor for mailbox driver > * Refine a little for dts nodes > > > Leo Yan (4): > dt-bindings: mailbox: Document Hi6220 mailbox driver > mailbox: Hi6220: add mailbox driver > arm64: dts: add mailbox node for Hi6220 > arm64: dts: add Hi6220's stub clock node > > .../bindings/mailbox/hisilicon,hi6220-mailbox.txt | 74 ++++ > arch/arm64/boot/dts/hisilicon/hi6220.dtsi | 64 ++++ > drivers/mailbox/Kconfig | 8 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/hi6220-mailbox.c | 395 +++++++++++++++++++++ > Applied 1 & 2 to mailbox-for-next. Patch-3&4 should go via asoc tree. Thanks -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
