Peng Fan 0a67003b19 mailbox: imx: add SCU MU support ... i.MX8/8X SCU MU is dedicated for communication between SCU and Cortex-A cores from hardware design, and could not be reused for other purpose. Per i.MX8/8X Reference mannual, Chapter "12.9.2.3.2 Messaging Examples", Passing short messages: Transmit register(s) can be used to pass short messages from one to four words in length. For example, when a four-word message is desired, only one of the registers needs to have its corresponding interrupt enable bit set at the receiver side; the message’s first three words are written to the registers whose interrupt is masked, and the fourth word is written to the other register (which triggers an interrupt at the receiver side). i.MX8/8X SCU firmware IPC is an implementation of passing short messages. But current imx-mailbox driver only support one word message, i.MX8/8X linux side firmware has to request four TX and four RX to support IPC to SCU firmware. This is low efficent and more interrupts triggered compared with one TX and one RX. To make SCU MU work, - parse the size of msg. - Only enable TR0/RR0 interrupt for transmit/receive message. - For TX/RX, only support one TX channel and one RX channel - For RX, support receive msg larger than 4 u32 words. - Support 6 channels, TX0/RX0/RXDB[0-3], not support TXDB. Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>		2020-03-19 23:04:32 -05:00
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arm_mhu.c
armada-37xx-rwtm-mailbox.c	mailbox:armada-37xx-rwtm:remove duplicate print in armada_37xx_mbox_probe()	2020-03-19 23:00:32 -05:00
bcm-flexrm-mailbox.c	maillbox: bcm-flexrm-mailbox: handle cmpl_pool dma allocation failure	2020-03-19 23:00:32 -05:00
bcm-pdc-mailbox.c	mailbox: bcm-pdc: Use scnprintf() for avoiding potential buffer overflow	2020-03-19 23:00:32 -05:00
bcm2835-mailbox.c
hi3660-mailbox.c
hi6220-mailbox.c	mailbox: no need to set .owner platform_driver_register	2019-11-26 22:45:15 -06:00
imx-mailbox.c	mailbox: imx: add SCU MU support	2020-03-19 23:04:32 -05:00
Kconfig	mailbox: sun6i-msgbox: Add a new mailbox driver	2020-03-19 23:00:32 -05:00
mailbox-altera.c
mailbox-sti.c
mailbox-test.c
mailbox-xgene-slimpro.c
mailbox.c
mailbox.h
Makefile	mailbox: sun6i-msgbox: Add a new mailbox driver	2020-03-19 23:00:32 -05:00
mtk-cmdq-mailbox.c	mailbox: mediatek: remove implementation related to atomic_exec	2020-03-19 23:00:32 -05:00
omap-mailbox.c	mailbox/omap: Handle if CONFIG_PM is disabled	2019-11-26 22:44:53 -06:00
pcc.c
pl320-ipc.c
platform_mhu.c
qcom-apcs-ipc-mailbox.c	mailbox: qcom-apcs: fix max_register value	2019-09-17 00:54:29 -05:00
rockchip-mailbox.c
stm32-ipcc.c	mailbox: stm32-ipcc: Update wakeup management	2019-11-30 23:08:59 -06:00
sun6i-msgbox.c	mailbox: sun6i-msgbox: Add a new mailbox driver	2020-03-19 23:00:32 -05:00
tegra-hsp.c	mailbox: tegra: Fix superfluous IRQ error message	2019-11-12 15:09:19 +01:00
ti-msgmgr.c
zynqmp-ipi-mailbox.c