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[34.38.134.32]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43625553208sm19992375e9.9.2024.12.12.07.43.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Dec 2024 07:43:58 -0800 (PST) From: Tudor Ambarus Subject: [PATCH v4 0/3] mailbox: add Samsung Exynos driver Date: Thu, 12 Dec 2024 15:43:44 +0000 Message-Id: <20241212-acpm-v4-upstream-mbox-v4-0-02f8de92cfaf@linaro.org> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIALAEW2cC/x3MPQqAMAxA4atIZgNtifhzFXGoGjVDtbRaBPHuF sdveO+ByEE4Qlc8EDhJlGPPoLKAabP7yihzNhhlSBtt0E7eYSK8fDwDW4duPG5sqak1KUWjqiC 3PvAi9//th/f9AOGOsatnAAAA To: Jassi Brar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krzysztof Kozlowski , Alim Akhtar Cc: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, andre.draszik@linaro.org, peter.griffin@linaro.org, kernel-team@android.com, willmcvicker@google.com, daniel.lezcano@linaro.org, vincent.guittot@linaro.org, ulf.hansson@linaro.org, arnd@arndb.de, Tudor Ambarus X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1734018238; l=2062; i=tudor.ambarus@linaro.org; s=20241212; h=from:subject:message-id; bh=inxG5U01dwICaPn51/1LEiQE4F0yknkNINDgMxzkN1Q=; b=y7Ognb6ayQPqwvgD0Lmzmg/KIvR0LOshRRT/Qq1JDx+MdDTUxE+D2Vxxb/cIfuliW7U13lCnz eGFOcRSXwbQBAGbbIwa9LJ/hA9vDdp7sXQ+xW2AKj+qCSkJ/4BIfRCb X-Developer-Key: i=tudor.ambarus@linaro.org; a=ed25519; pk=uQzE0NXo3dIjeowMTOPCpIiPHEz12IA/MbyzrZVh9WI= The samsung exynos mailbox controller has 16 flag bits for hardware interrupt generation and a shared register for passing mailbox messages. When the controller is used by the ACPM protocol the shared register is ignored and the mailbox controller acts as a doorbell. The controller just raises the interrupt to APM after the ACPM protocol has written the message to SRAM. I mark this as v3 because it is a continuation of: https://lore.kernel.org/linux-arm-kernel/20241017163649.3007062-1-tudor.ambarus@linaro.org/ Changes in v4: - rename bindings file to be based on compatible: google,gs101-acpm-mbox - specify doorbell or data mode via '#mbox-cells' dt property. Update driver and introduce exynos_mbox_of_xlate() to parse the mode. - s/samsung/Samsung/, s/exynos/Exynos/ - use writel instead of writel_relaxed - remove stray of_match_ptr() Changes in v3: - decouple the mailbox controller driver from the ACPM protocol driver - address Krzysztof's review comments v2: https://lore.kernel.org/linux-arm-kernel/20241017163649.3007062-1-tudor.ambarus@linaro.org/ v1: https://lore.kernel.org/linux-arm-kernel/20241004165301.1979527-1-tudor.ambarus@linaro.org/ Signed-off-by: Tudor Ambarus --- Tudor Ambarus (3): dt-bindings: mailbox: add google,gs101-mbox bindings mailbox: add Samsung Exynos driver MAINTAINERS: add entry for Samsung Exynos mailbox driver .../bindings/mailbox/google,gs101-mbox.yaml | 79 +++++++++ MAINTAINERS | 10 ++ drivers/mailbox/Kconfig | 11 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/exynos-mailbox.c | 184 +++++++++++++++++++++ include/dt-bindings/mailbox/google,gs101.h | 14 ++ 6 files changed, 300 insertions(+) --- base-commit: fac04efc5c793dccbd07e2d59af9f90b7fc0dca4 change-id: 20241212-acpm-v4-upstream-mbox-948714004b05 Best regards,