linux-kernel - [PATCH v3 0/3] mailbox: zynqmp: Enable Bufferless IPIs for Versal based SOCs

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Date: Wed, 10 Apr 2024 10:08:22 -0700
From: Ben Levinsky <ben.levinsky@....com>
To: <jassisinghbrar@...il.com>, <michal.simek@....com>,
	<shubhrajyoti.datta@....com>, <tanmay.shah@....com>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v3 0/3] mailbox: zynqmp: Enable Bufferless IPIs for Versal based SOCs

For Xilinx-AMD Versal and Versal NET SOC's there exist also
inter-processor-interrupts (IPIs) without IPI Message Buffers. For these
enable use of IPI Mailbox driver for send/receive as well.

This is enabled with new compatible string: "xlnx,versal-ipi-mailbox"

Original, buffered usage for ZynqMP based SOC is still supported.

Note that Versal bindings are already present in xlnx,zynqmp-ipi-mailbox.yaml

v2:
- formatting in 2/3 patch
- remove extra handling in 3/3 versal_ipi_setup()
v3:
1/3 - removed additional newline to avoid
/scripts/checkpatch.pl --strict -f drivers/mailbox/zynqmp-ipi-mailbox.c
CHECK: Please don't use multiple blank lines
#434: FILE: drivers/mailbox/zynqmp-ipi-mailbox.c:434:
+
+
2/3 - remove unused variable dev
drivers/mailbox/zynqmp-ipi-mailbox.c:565:24: warning: variable 'dev' set but not 
used [-Wunused-but-set-variable]
         struct device *mdev, *dev;
3/3 - remove unused variable dev
                               ^
drivers/mailbox/zynqmp-ipi-mailbox.c:666:24: warning: variable 'dev' set but not 
used [-Wunused-but-set-variable]
         struct device *mdev, *dev;
                               ^

Ben Levinsky (3):
  mailbox: zynqmp: Move of_match structure closer to usage
  mailbox: zynqmp: Move buffered IPI setup to of_match selected routine
  mailbox: zynqmp: Enable Bufferless IPI usage on Versal-based SOC's

 drivers/mailbox/zynqmp-ipi-mailbox.c | 257 ++++++++++++++++++++++-----
 1 file changed, 212 insertions(+), 45 deletions(-)

-- 
2.25.1