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(unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 68E1D3F64C; Fri, 11 Aug 2023 09:15:49 -0700 (PDT) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, etienne.carriere@linaro.org, peng.fan@oss.nxp.com, chuck.cannon@nxp.com, souvik.chakravarty@arm.com, nicola.mazzucato@arm.com, Cristian Marussi Subject: [PATCH 0/6] Add SCMI v3.2 Clock new CONFIGs support Date: Fri, 11 Aug 2023 17:14:40 +0100 Message-ID: <20230811161446.636253-1-cristian.marussi@arm.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773951393023594401 X-GMAIL-MSGID: 1773951393023594401 Hi all, this small series introduces support for the new Clock CONFIG features added by SCMI v3.2 specification [1]. It does NOT add support, still, for the SCMI v3.2 Clock reparenting features added in v3.2 too. After a small refactoring in [1/6], support for the new CONFIG_SET message format is added in [2/6]: this is just internal rework to support new and legacy (pre-v3.2) message formats. Patch [3/6] adds support for the new v3.2 CONFIG_GET command and adds a new related Clock operation .state_get() to retrieve the enabled state of one clock when talking to a v3.2 compliant server. Patch [4/6] extend .state_get() support to legacy SCMI platforms implementing pre-v3.2 SCMI stacks: in such a scenario we can use the old CLOCK_ATTRIBUTES command to retrieve the clock state. Patch [5/6] finally wires up this new .state_get() clock operation to the Linux Clock framework .is_enabled() callback, AS-LONG-AS the underlying configured SCMI stack supports atomic operations. (since .is_enabled() is required not to sleep) This *should* ease unused clocks management by the Linux Clock framework. Last but not least, patch [6/6] exposes a couple more SCMI Clock operations in order to be able to set/get OEM specific clock configuration values as described in SCMI v3.2 specification; it is marked as RFC since, even though trivial and tested in emulation, there are really at the moment NO real users for these new OEM-related clock operations. Tested on JUNO and on an SCMI emulation setup. Based on v6.5-rc5. Any feedback welcome, Thanks, Cristian [1]: https://developer.arm.com/documentation/den0056/e Cristian Marussi (6): firmware: arm_scmi: Simplify enable/disable Clock operations firmware: arm_scmi: Add Clock v3.2 CONFIG_SET support firmware: arm_scmi: Add v3.2 Clock CONFIG_GET support firmware: arm_scmi: Add Clock .state_get support to pre-v3.2 clk: scmi: Add support for .is_enabled clk_ops [RFC] firmware: arm_scmi: Add Clock OEM config clock operations drivers/clk/clk-scmi.c | 31 ++++- drivers/firmware/arm_scmi/clock.c | 220 +++++++++++++++++++++++++++--- include/linux/scmi_protocol.h | 19 ++- 3 files changed, 240 insertions(+), 30 deletions(-)