Hi, These series adds ARM MHU doorbell controller driver based on the discussion[1]. The DT patches are just repost from Viresh's last posting[2] Regards, Sudeep v1[3]->v2: - No updates to binding patches(1-2) - Fixed memory leak and improved logic to find free channel reusing mhu_db_mbox_to_channel as suggested by Jassi [1] https://lore.kernel.org/r/20200909044618.deyx37pzocxiga7u@vireshk-i7 [2] https://lore.kernel.org/r/3874de094d193a08624a00a35067a3237e0b42b1.1600249102.git.viresh.kumar@xxxxxxxxxx [3] https://lore.kernel.org/r/20200928114445.19689-1-sudeep.holla@xxxxxxx Sudeep Holla (3): dt-bindings: mailbox: add doorbell support to ARM MHU mailbox: arm_mhu: Match only if compatible is "arm,mhu" mailbox: arm_mhu: Add ARM MHU doorbell driver Viresh Kumar (1): dt-bindings: mailbox : arm,mhu: Convert to Json-schema .../devicetree/bindings/mailbox/arm,mhu.yaml | 135 +++++++ .../devicetree/bindings/mailbox/arm-mhu.txt | 43 --- drivers/mailbox/Makefile | 2 +- drivers/mailbox/arm_mhu.c | 3 + drivers/mailbox/arm_mhu_db.c | 354 ++++++++++++++++++ 5 files changed, 493 insertions(+), 44 deletions(-) create mode 100644 Documentation/devicetree/bindings/mailbox/arm,mhu.yaml delete mode 100644 Documentation/devicetree/bindings/mailbox/arm-mhu.txt create mode 100644 drivers/mailbox/arm_mhu_db.c -- 2.17.1