From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x2261Qru1VZF5uypb6CRERQFbcBeQTIHCqQF56hb2Yzh4UnVRR1dskEoIb5QhUGnKrxJhGPn6 ARC-Seal: i=1; a=rsa-sha256; t=1518461142; cv=none; d=google.com; s=arc-20160816; b=WFj8JSU6YMmBYCdtGVux5z30VGIntXBeh79dasokQ+uL9Yrl9XMayA/EYx3LE4HNoK Qp69ASCJT0qSbkzFAFBJNGuohRxMtgNkBMu82GoQUY669bvkYnyTdzFBCPq/ihyGsInx o5G0MiANbDVkWgWiB5M/9De3XA9h34/C4lcyklXu1RVYdtNxaJmwkmuiyYRJX4jOXlPw s5uPfC1nyY98Y7nQ2BENHLyH5LVl2kmCmkyFGmhYjAiu2jWUpkXy2oMktj2ztQjoBdbM vc1wiKGgiY5upNU7u1pDy3126nRKJhDWGF17rzFGMMDULKeVvMHIq1Ptra1Wt9gTggRu 7lsg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=message-id:date:subject:cc:to:from:arc-authentication-results; bh=PS7NBl2JQisHVBRPtbsLgAqjor67bBLsYVMxq5goHYk=; b=DiWuRLnFQe0El8CPj0pfX8nGhmI8DrDCw6LOJBJqDJ1MhUy01F8TM/EJqyVEIGy7N4 F89FYAYD2v1Jn9QG9H24ULoNcs+eMGF+ON3MC+DIGVw5y8w4jmmwj/d5MMXAwN9XV4oq seYehjib0Pvidce9gqwSDoFgHUJjQcfqfkspZW8S5ITOxL5O709l5tMZZw6j5Q08cIN4 0ix20tF1XlJV8uvWotR+JZhshzt1rbFeF7ow3qlaYO/qdihRfdTD1LBcO4JG82ZnTYqz 5ruEBa/+mpg6GXcwZT1AkR3kfyWHtGXXvE1h0d2jd8X4QGhKvjZIo7cwtMtTHMmcyZO4 EkIQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of sudeep.holla@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=sudeep.holla@arm.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of sudeep.holla@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=sudeep.holla@arm.com From: Sudeep Holla To: ALKML , LKML , DTML Cc: Sudeep Holla , Greg Kroah-Hartman , Arnd Bergmann , Alexey Klimov Subject: [PATCH v5 00/20][RESEND] firmware: ARM System Control and Management Interface(SCMI) support Date: Mon, 12 Feb 2018 18:45:04 +0000 Message-Id: <1518461124-17371-1-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 2.7.4 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1592221911183430118?= X-GMAIL-MSGID: =?utf-8?q?1592221911183430118?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Hi all, ARM System Control and Management Interface(SCMI) is more flexible and easily extensible than any of the existing interfaces. Many vendors were involved in the making of this formal specification and is now published[1]. There is a strong trend in the industry to provide micro-controllers in systems to abstract various power, or other system management tasks. These controllers usually have similar interfaces, both in terms of the functions that are provided by them, and in terms of how requests are communicated to them. This specification is to standardise and avoid (any further) fragmentation in the design of such interface by various vendors. This patch set is intended to get feedback on the design and structure of the code. This is not complete and not fully tested due to non-availability of firmware with full feature set at this time. It currently doesn't support notification, asynchronous/delayed response, perf/power statistics region and sensor register region to name a few. I have borrowed some of the ideas of message allocation/management from TI SCI. Changes: v4[6]->v5: - Rebased to v4.16-rc1 - Updated all the gathered Ack/Reviewed-by tags(which includes all the drivers using SCMI protocol) v3[5]->v4[6]: - Added SCMI protocol bus to enumerate supported protocols as suggested by Arnd - Dropped the abstraction to mailbox as it may be optional v2[4]->v3: - Addressed various comments received so far(clock, hwmon and cpufreq drivers along with scmi drivers) - Hwmon driver now uses core layer to create and manage sysfs attributes - Added a shim layer to abstract the mailbox interface to support any custom adaptation required by the controller driver - Simple ARM MHU shim layer using newly added abstraction v1[3]->v2[4]: - Additional support for polling based DVFS and per protocol channels - Dependent drivers(clock, hwmon, cpufreq and power domains) - Various other review comments and issued found during testing addressed - Explicit binding for method dropped as even SMC based method are adviertised as mailbox RFC[2]->v1[3]: - Add generic mailbox binding for shared memory(Rob H) - Dropped compatibles per protocol(Suggested by Matt S) - Dropped lot of unnecessary pointer casting(Arnd B) - Dropped packing of structures(Arnd B) - Few other changes/additions based initial testing with firmware providing SCMI interface to OSPM -- Regards, Sudeep [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/index.html [2] https://marc.info/?l=linux-kernel&m=149685193627620&w=2 [3] https://marc.info/?l=linux-arm-kernel&m=149849482623492&w=2 [4] https://marc.info/?l=devicetree&m=150185763105926&w=2 [5] https://marc.info/?l=devicetree&m=150660452015351&w=2 [6] https://marc.info/?l=devicetree&m=150972061408961&w=2 Sudeep Holla (20): dt-bindings: mailbox: add support for mailbox client shared memory dt-bindings: arm: add support for ARM System Control and Management Interface(SCMI) protocol firmware: arm_scmi: add basic driver infrastructure for SCMI firmware: arm_scmi: add common infrastructure and support for base protocol firmware: arm_scmi: add scmi protocol bus to enumerate protocol devices firmware: arm_scmi: add initial support for performance protocol firmware: arm_scmi: add initial support for clock protocol firmware: arm_scmi: add initial support for power protocol firmware: arm_scmi: add initial support for sensor protocol firmware: arm_scmi: probe and initialise all the supported protocols firmware: arm_scmi: add support for polling based SCMI transfers firmware: arm_scmi: add option for polling based performance domain operations firmware: arm_scmi: refactor in preparation to support per-protocol channels firmware: arm_scmi: add per-protocol channels support using idr objects firmware: arm_scmi: add device power domain support using genpd clk: add support for clocks provided by SCMI hwmon: (core) Add hwmon_max to hwmon_sensor_types enumeration hwmon: add support for sensors exported via ARM SCMI cpufreq: add support for CPU DVFS based on SCMI message protocol cpufreq: scmi: add support for fast frequency switching Documentation/devicetree/bindings/arm/arm,scmi.txt | 179 +++++ .../devicetree/bindings/mailbox/mailbox.txt | 28 + MAINTAINERS | 11 +- drivers/clk/Kconfig | 10 + drivers/clk/Makefile | 1 + drivers/clk/clk-scmi.c | 213 +++++ drivers/cpufreq/Kconfig.arm | 21 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/scmi-cpufreq.c | 264 +++++++ drivers/firmware/Kconfig | 34 + drivers/firmware/Makefile | 1 + drivers/firmware/arm_scmi/Makefile | 5 + drivers/firmware/arm_scmi/base.c | 264 +++++++ drivers/firmware/arm_scmi/bus.c | 232 ++++++ drivers/firmware/arm_scmi/clock.c | 353 +++++++++ drivers/firmware/arm_scmi/common.h | 116 +++ drivers/firmware/arm_scmi/driver.c | 876 +++++++++++++++++++++ drivers/firmware/arm_scmi/perf.c | 492 ++++++++++++ drivers/firmware/arm_scmi/power.c | 232 ++++++ drivers/firmware/arm_scmi/scmi_pm_domain.c | 140 ++++ drivers/firmware/arm_scmi/sensors.c | 302 +++++++ drivers/hwmon/Kconfig | 12 + drivers/hwmon/Makefile | 1 + drivers/hwmon/scmi-hwmon.c | 233 ++++++ include/linux/hwmon.h | 1 + include/linux/scmi_protocol.h | 270 +++++++ 26 files changed, 4287 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/arm,scmi.txt create mode 100644 drivers/clk/clk-scmi.c create mode 100644 drivers/cpufreq/scmi-cpufreq.c create mode 100644 drivers/firmware/arm_scmi/Makefile create mode 100644 drivers/firmware/arm_scmi/base.c create mode 100644 drivers/firmware/arm_scmi/bus.c create mode 100644 drivers/firmware/arm_scmi/clock.c create mode 100644 drivers/firmware/arm_scmi/common.h create mode 100644 drivers/firmware/arm_scmi/driver.c create mode 100644 drivers/firmware/arm_scmi/perf.c create mode 100644 drivers/firmware/arm_scmi/power.c create mode 100644 drivers/firmware/arm_scmi/scmi_pm_domain.c create mode 100644 drivers/firmware/arm_scmi/sensors.c create mode 100644 drivers/hwmon/scmi-hwmon.c create mode 100644 include/linux/scmi_protocol.h -- 2.7.4