linux/drivers/mailbox, branch v5.7

mailbox: imx: add SCU MU support

2020-03-20T04:04:32Z

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 Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: restructure code to make easy for new MU

2020-03-20T04:03:11Z

Add imx_mu_generic_tx for data send and imx_mu_generic_rx for interrupt data receive. Pack original mu chans related code into imx_mu_init_generic Add tx/rx/init hooks into imx_mu_dcfg With these, it will be a bit easy to introduce i.MX8/8X SCU type MU dedicated to communicate with SCU. Reviewed-by: Oleksij Rempel Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: mediatek: remove implementation related to atomic_exec

2020-03-20T04:00:32Z

After implement flush, client can flush the executing command buffer or abort the still waiting for event command buffer, so controller do not need to implement atomic_exe feature. remove it. Signed-off-by: Bibby Hsieh Reviewed-by: CK Hu Signed-off-by: Jassi Brar

mailbox: mediatek: implement flush function

2020-03-20T04:00:32Z

For client driver which need to reorganize the command buffer, it could use this function to flush the send command buffer. If the channel doesn't be started (usually in waiting for event), this function will abort it directly. Signed-off-by: Bibby Hsieh Reviewed-by: CK Hu Signed-off-by: Jassi Brar

maillbox: bcm-flexrm-mailbox: handle cmpl_pool dma allocation failure

2020-03-20T04:00:32Z

Handle 'cmpl_pool' dma memory allocation failure. Fixes: a9a9da47f8e6 ("mailbox: no need to check return value of debugfs_create functions") Signed-off-by: Rayagonda Kokatanur Reviewed-by: Tyler Hicks Signed-off-by: Jassi Brar

mailbox: sun6i-msgbox: Add a new mailbox driver

2020-03-20T04:00:32Z

Allwinner sun6i, sun8i, sun9i, and sun50i SoCs contain a hardware message box used for communication between the ARM CPUs and the ARISC management coprocessor. This mailbox contains 8 unidirectional 4-message FIFOs. Add a driver for it, so it can be used with the Linux mailbox framework. Reviewed-by: Philipp Zabel Signed-off-by: Samuel Holland Signed-off-by: Jassi Brar

mailbox: bcm-pdc: Use scnprintf() for avoiding potential buffer overflow

2020-03-20T04:00:32Z

Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Signed-off-by: Takashi Iwai Signed-off-by: Jassi Brar

mailbox:armada-37xx-rwtm:remove duplicate print in armada_37xx_mbox_probe()

2020-03-20T04:00:32Z

In this function,we don't need dev_err() message because when something goes wrong,platform_get_irq() and devm_platform_ioremap_resource() have print an error message itself, so we should remove duplicate dev_err(). Signed-off-by: Tang Bin Signed-off-by: Jassi Brar

mailbox: armada-37xx-rwtm: convert to devm_platform_ioremap_resource

2020-01-08T09:41:52Z

Use devm_platform_ioremap_resource() to simplify code. Signed-off-by: Yangtao Li Signed-off-by: Gregory CLEMENT

Merge tag 'mailbox-v5.5' of git://git.linaro.org/landing-teams/working/fujitsu/integration

2019-12-02T02:42:02Z

Pull mailbox updates from Jassi Brar: - omap : misc - catch error returned from pm_runtime_put_sync - hisi : misc - drop .owner from platform_driver - stm : change how wakeup is handled - imx : fix - bailout on error and nuke correct irq - imx : add support for imx7ulp platform * tag 'mailbox-v5.5' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: imx: add support for imx v1 mu dt-bindings: mailbox: imx-mu: add imx7ulp MU support mailbox: imx: Clear the right interrupts at shutdown mailbox: imx: Fix Tx doorbell shutdown path mailbox: stm32-ipcc: Update wakeup management mailbox: no need to set .owner platform_driver_register mailbox/omap: Handle if CONFIG_PM is disabled