[PATCH v6 0/2] ASPEED: Add mailbox driver for AST2700 series

[Jammy Huang <jammy_huang@aspeedtech.com>]

Add mailbox controller driver for AST27XX SoCs, which provides
independent tx/rx mailbox between different processors. There are 4
channels for each tx/rx mailbox and each channel has an 32-byte FIFO.

 v6 changes:
  - Update document
     1. Update description to preserve paragraphs.
     2. Update for property, reg.
     3. Add reg-names.
     4. Add 'Reviewed-by' from Krok.
  - Update driver
     1. Use devm_platform_ioremap_resource_byname since we add reg-names now.
     2. Update error code for ch not enabled. 
 
 v5 changes:
  - Update document
     1. Separate reg from 1 to 2. 1st is tx controller; 2nd is rx.
     2. Remove 'Reviewed-by' since the patch has changed.
  - Update driver, no functional changes.
     1. Update since there is 2 reg base now.
     2. Refine reg definitions
     3. Add spinlock to protect registers
     4. Use bool as return value for ast2700_mbox_tx_done
     5. Rename variable from drv_data to dev_data.

 v4 changes:
  - Update driver, no functional changes.
     1. Remove unused variable, rx_buff, in struct ast2700_mbox.
     2. Remove unneeded cast on device_get_match_data.
     3. Remove the usage of writel/readl_relaxed.
     4. Improve readability.
 v3 changes:
  - Correct document
     1. Use 32-bit addressing in dts example property, reg.
 v2 changes:
  - Update document
     1. Correct error in dts example.
     2. Drop description for mbox-cell per suggestion previously.

Jammy Huang (2):
  dt-bindings: mailbox: Add ASPEED AST2700 series SoC
  mailbox: aspeed: add mailbox driver for AST27XX series SoC

 .../mailbox/aspeed,ast2700-mailbox.yaml       |  68 +++++
 drivers/mailbox/Kconfig                       |   8 +
 drivers/mailbox/Makefile                      |   2 +
 drivers/mailbox/ast2700-mailbox.c             | 240 ++++++++++++++++++
 4 files changed, 318 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/aspeed,ast2700-mailbox.yaml
 create mode 100644 drivers/mailbox/ast2700-mailbox.c


base-commit: ec7714e4947909190ffb3041a03311a975350fe0
-- 
2.25.1