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Wolfram Sang 5e4907c490 mailbox: add list of used channels to debugfs ...

During development, it is useful to see which mailboxes are currently
obtained. Use a seq-file in debugfs to list the currently registered
controllers and their used channels. Example output from a Renesas R-Car
X5H based system:

 # cat /sys/kernel/debug/mailbox/mailbox_summary

189e0000.system-controller:
   0: c1000000.mailbox_test_send_to_recv
   1: c1000100.mailbox_test_recv_to_send
 128: c1000100.mailbox_test_recv_to_send
 129: c1000000.mailbox_test_send_to_recv
189e1000.system-controller:
   4: scmi_dev.1
   5: scmi_dev.2

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>

2026-05-18 13:37:28 -05:00

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