linux/drivers/mailbox, branch v5.0

mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue

2019-02-18T16:40:58Z

RING_CONTROL reg was not written due to wrong address, hence all the subsequent ring flush was timing out. Fixes: a371c10ea4b3 ("mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush sequence") Signed-off-by: Rayagonda Kokatanur Signed-off-by: Ray Jui Reviewed-by: Scott Branden Signed-off-by: Jassi Brar

mailbox: Export mbox_flush()

2019-02-18T16:39:17Z

The mbox_flush() function can be used by drivers that are built as modules, so the function needs to be exported. Reported-by: Mark Brown Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: tegra-hsp: Use device-managed registration API

2018-12-22T04:31:26Z

In order to get rid of a lot of cleanup boilerplate code, use the device-managed registration API. Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: tegra-hsp: use devm_kstrdup_const()

2018-12-22T04:31:26Z

Use devm_kstrdup_const() in the tegra-hsp driver. This mostly serves as an example of how to use this new routine to shrink driver code. Also use devm_kzalloc() instead of regular kzalloc() to shrink the driver even more. Doorbell objects are only removed in the driver's remove callback so it's safe to convert all memory allocations to devres. Signed-off-by: Bartosz Golaszewski Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: tegra-hsp: Add suspend/resume support

2018-12-22T04:31:26Z

Upon resuming from a system sleep state, the interrupts for all active shared mailboxes need to be reenabled, otherwise they will not work. Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: tegra-hsp: Add support for shared mailboxes

2018-12-22T04:31:26Z

The Tegra HSP block supports 'shared mailboxes' that are simple 32-bit registers consisting of a FULL bit in MSB position and 31 bits of data. The hardware can be configured to trigger interrupts when a mailbox is empty or full. Add support for these shared mailboxes to the HSP driver. The initial use for the mailboxes is the Tegra Combined UART. For this purpose, we use interrupts to receive data, and spinning to wait for the transmit mailbox to be emptied to minimize unnecessary overhead. Based on work by Mikko Perttunen . Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: Allow multiple controllers per device

2018-12-22T04:31:26Z

Look through the whole controller list when mapping device tree phandles to controllers instead of stopping at the first one. Each controller is intended to only contain one kind of mailbox, but some devices (like Tegra HSP) implement multiple kinds and use the same device tree node for all of them. As such, we need to allow multiple mbox_controllers per device tree node. Signed-off-by: Mikko Perttunen Signed-off-by: Jassi Brar

mailbox: Support blocking transfers in atomic context

2018-12-22T04:31:26Z

The mailbox framework supports blocking transfers via completions for clients that can sleep. In order to support blocking transfers in cases where the transmission is not permitted to sleep, add a new ->flush() callback that controller drivers can implement to busy loop until the transmission has been completed. A new mbox_flush() function can be called by mailbox consumers in atomic context to make sure a transfer has completed. Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Use device-managed registration API

2018-12-21T22:49:26Z

Get rid of some boilerplate driver removal code by using the newly added device-managed registration API. Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar

mailbox: stm32-ipcc: Use device-managed registration API

2018-12-21T22:49:26Z

Get rid of some boilerplate driver removal code by using the newly added device-managed registration API. Reviewed-by: Ludovic Barre Signed-off-by: Thierry Reding Signed-off-by: Jassi Brar