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[83.9.2.167]) by smtp.gmail.com with ESMTPSA id 27-20020ac2483b000000b004f858249932sm1927732lft.90.2023.07.15.07.37.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Jul 2023 07:37:19 -0700 (PDT) From: Konrad Dybcio Subject: [PATCH v3 0/2] Resolve MPM register space situation Date: Sat, 15 Jul 2023 16:37:10 +0200 Message-Id: <20230328-topic-msgram_mpm-v3-0-2c72f27b4706@linaro.org> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIABavsmQC/4WN0Q6CIBhGX8VxHQ1Bk7rqPVprgL/6bwIOjNWc7 x56101dnm/7zllIhIAQyaVYSICEEb3LIA4FMYNyPVBsMxPOuGCCSzr7CQ21sQ/KPuxkqTlJqUF ow88VyTetIlAdlDNDPrrnOOZxCtDha+/c7pkHjLMP7z2bym39UUglZbTUjZSq7molxHVEp4I/+ tCTzZb4PwPPBuCVqiTUTcfaL8O6rh9W4TQxCAEAAA== To: Andy Gross , Bjorn Andersson , Thomas Gleixner , Marc Zyngier , Rob Herring , Krzysztof Kozlowski , Shawn Guo , Conor Dooley Cc: Marijn Suijten , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1689431838; l=2027; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=HY4bja96z3HZK1pydbJM0rSpcC7fy2yGgK79IMSfsXc=; b=I5HQQyjFCoBt+fL13S3iDwYZxgitiRcPGqRZSP+r5mwRBGEBn73r/8ZH/6Peh7i6E/JlH0N5s zEmu+y/cZM5BtDvoS5Dl78Zt9Ji0rfV6PDMjgavVupYjMFafSjR3F9m X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org v2 -> v3: - Fix the example - Pick up tags - remove the outdated example from the cover letter, check bindings should you want to see one The bindings for the wrapper node used in the yaml example are merged in qcom/for-next Link to v2: https://lore.kernel.org/r/20230328-topic-msgram_mpm-v2-0-e24a48e57f0d@linaro.org v1 -> v2: - deprecate 'reg', make qcom,rpm-msg-ram required [1/2] - Use devm_ioremap() [2/2] Link to v1: https://lore.kernel.org/r/20230328-topic-msgram_mpm-v1-0-1b788a5f5a33@linaro.org Depends on resolution of https://github.com/devicetree-org/dt-schema/issues/104 The MPM (and some other things, irrelevant to this patchset) resides (as far as the ARM cores are concerned, anyway) in a MMIO-mapped region that's a portion of the RPM (low-power management core)'s RAM, known as the RPM Message RAM. Representing this relation in the Device Tree creates some challenges, as one would either have to treat a memory region as a bus, map nodes in a way such that their reg-s would be overlapping, or supply the nodes with a slice of that region. This series implements the third option, by adding a qcom,rpm-msg-ram property, which has been used for some drivers poking into this region before. Bindings ABI compatibility is preserved through keeping the "normal" (a.k.a read the reg property and map that region) way of passing the register space. Signed-off-by: Konrad Dybcio --- Konrad Dybcio (2): dt-bindings: interrupt-controller: mpm: Pass MSG RAM slice through phandle irqchip: irq-qcom-mpm: Support passing a slice of SRAM as reg space .../bindings/interrupt-controller/qcom,mpm.yaml | 44 +++++++++++++--------- drivers/irqchip/irq-qcom-mpm.c | 21 +++++++++-- 2 files changed, 45 insertions(+), 20 deletions(-) --- base-commit: 7c2878be573282a9961c359b806ccf70afe1a6b6 change-id: 20230328-topic-msgram_mpm-c688be3bc294 Best regards,