From patchwork Tue Aug 17 00:54:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 498181 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C27C9C4320A for ; Tue, 17 Aug 2021 00:55:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9BE260EFF for ; Tue, 17 Aug 2021 00:55:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235351AbhHQAzs (ORCPT ); Mon, 16 Aug 2021 20:55:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235199AbhHQAzr (ORCPT ); Mon, 16 Aug 2021 20:55:47 -0400 Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F18AC06179A for ; Mon, 16 Aug 2021 17:55:15 -0700 (PDT) Received: by mail-lj1-x22e.google.com with SMTP id n6so30065740ljp.9 for ; Mon, 16 Aug 2021 17:55:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=C/jXyVM8A6IIIf73CUW3opic/WD75vfkmRvuKQWW4Jo=; b=Ilqv4TYrhWro5ne/pyK8Z8uNieTgQV6uYOzuf7BRghGmB8vnlhfGvOr/0/e/S1IwQs 7hQf66rKkZbN2FzNg/lAkY8kGf8968Opho/WF3Oda7z3Bq5zGkHWUDeKdTIMK9vnpdcr Q21Q+ebQypHAX5SMsmdNk0shvXZpPmldQV8JkAnN+rTBj1EPUQqbI161vTAsodd2SjvZ MCqb1O1Ze+1fb4BtL/U3gENTSpiIzkKkc+t3xLBPezJesXnuxw+T6kn1KhGum0t21LcO jMIXT/hfLcwRdk65I9OuXZg0sgiZ+Ph1sisDURKJYN/RBaSvnazEEt1aLfLUFDVTen6Z an+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=C/jXyVM8A6IIIf73CUW3opic/WD75vfkmRvuKQWW4Jo=; b=Tgs0nNy+catRUQUeMgtqv7gy+UziMw6i0FC7vx39wTNdQsvprqCrAe3EGW+2Qk15Z8 JqvaV3pQX8eDreb45hOQGiXLt5BnckKOdg2rs0S+FB1kxrN3gsxaFfZ2GOL/EeDlwSUG 7hBmhbKH+FmNdE648pt5EgTAwu7OxUhnAfvK5m9NzYzFguliRl0U18QMjZeJ1pFaRXrn kgzHd3wndE6UQjVn1sXBA/g8PYVi9FIAHug8m7J+Dd00wlvBe4YMRA3ZJLAcSZu1JHun dduYWzHRAedG//kDlgwzBcMd8BQgsgWHg5qN1Akdclo/3LHdtvUNL7RKYTG5Tv/UpdK+ 7bRQ== X-Gm-Message-State: AOAM531tCjvzAYlNjw4HFDQBJmbNQlpeVmIQcBRmqIhN3ER7GHqMDWUe eJ4BHPa/Q9uYrYosGY9Y00Iqrg== X-Google-Smtp-Source: ABdhPJxgPqsyxqeCXBI3IsVJLkcFyXipmzYz3hTJEmurF1pvQfTvThKjXBvusty3YDmk6qnRjBkDxQ== X-Received: by 2002:a05:651c:118f:: with SMTP id w15mr779302ljo.47.1629161713357; Mon, 16 Aug 2021 17:55:13 -0700 (PDT) Received: from eriador.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id z6sm40719lfb.251.2021.08.16.17.55.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 17:55:12 -0700 (PDT) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Ulf Hansson , Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , Kalle Valo , "David S. Miller" , Jakub Kicinski , Stanimir Varbanov Cc: linux-arm-msm@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [RFC PATCH 00/15] create power sequencing subsystem Date: Tue, 17 Aug 2021 03:54:52 +0300 Message-Id: <20210817005507.1507580-1-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This is an RFC of the proposed power sequencer subsystem. This is a generification of the MMC pwrseq code. The subsystem tries to abstract the idea of complex power-up/power-down/reset of the devices. The primary set of devices that promted me to create this patchset is the Qualcomm BT+WiFi family of chips. They reside on serial+platform interfaces (older generations) or on serial+PCIe (newer generations). They require a set of external voltage regulators to be powered on and (some of them) have separate WiFi and Bluetooth enable GPIOs. This patchset being an RFC tries to demonstrate the approach, design and usage of the pwrseq subsystem. Following issues are present in the RFC at this moment but will be fixed later if the overall approach would be viewed as acceptable: - No documentation While the code tries to be self-documenting proper documentation would be required. - Minimal device tree bindings changes There are no proper updates for the DT bindings (thus neither Rob Herring nor devicetree are included in the To/Cc lists). The dt schema changes would be a part of v1. - Lack of proper PCIe integration At this moment support for PCIe is hacked up to be able to test the PCIe part of qca6390. Proper PCIe support would require automatically powering up the devices before the scan basing on the proper device structure in the device tree. ---------------------------------------------------------------- Dmitry Baryshkov (15): power: add power sequencer subsystem pwrseq: port MMC's pwrseq drivers to new pwrseq subsystem mmc: core: switch to new pwrseq subsystem ath10k: add support for pwrseq sequencing Bluetooth: hci_qca: merge qca_power into qca_serdev Bluetooth: hci_qca: merge init paths Bluetooth: hci_qca: merge qca_power_on with qca_regulators_init Bluetooth: hci_qca: futher rework of power on/off handling Bluetooth: hci_qca: add support for pwrseq pwrseq: add support for QCA BT+WiFi power sequencer arm64: dts: qcom: sdm845-db845c: switch bt+wifi to qca power sequencer arm64: dts: qcom: qrb5165-rb5: add bluetooth support arm64: dts: qcom: sdm845-db845c: add second channel support to qca power sequencer WIP: PCI: qcom: use pwrseq to power up bus devices WIP: arm64: dts: qcom: qrb5165-rb5: add bus-pwrseq property to pcie0 .../{mmc => power/pwrseq}/mmc-pwrseq-emmc.yaml | 0 .../{mmc => power/pwrseq}/mmc-pwrseq-sd8787.yaml | 0 .../{mmc => power/pwrseq}/mmc-pwrseq-simple.yaml | 0 arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 51 +++ arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 28 +- arch/arm64/boot/dts/qcom/sdm845.dtsi | 6 + drivers/bluetooth/hci_qca.c | 286 +++++++------- drivers/mmc/core/Kconfig | 32 -- drivers/mmc/core/Makefile | 4 - drivers/mmc/core/core.c | 9 +- drivers/mmc/core/host.c | 8 +- drivers/mmc/core/mmc.c | 3 +- drivers/mmc/core/pwrseq.c | 117 ------ drivers/mmc/core/pwrseq.h | 58 --- drivers/mmc/core/pwrseq_emmc.c | 120 ------ drivers/mmc/core/pwrseq_sd8787.c | 107 ------ drivers/mmc/core/pwrseq_simple.c | 164 -------- drivers/net/wireless/ath/ath10k/snoc.c | 63 +++- drivers/net/wireless/ath/ath10k/snoc.h | 2 + drivers/pci/controller/dwc/pcie-qcom.c | 13 + drivers/power/Kconfig | 1 + drivers/power/Makefile | 1 + drivers/power/pwrseq/Kconfig | 57 +++ drivers/power/pwrseq/Makefile | 11 + drivers/power/pwrseq/core.c | 411 +++++++++++++++++++++ drivers/power/pwrseq/pwrseq_emmc.c | 118 ++++++ drivers/power/pwrseq/pwrseq_qca.c | 291 +++++++++++++++ drivers/power/pwrseq/pwrseq_sd8787.c | 97 +++++ drivers/power/pwrseq/pwrseq_simple.c | 160 ++++++++ include/linux/mmc/host.h | 4 +- include/linux/pwrseq/consumer.h | 88 +++++ include/linux/pwrseq/driver.h | 71 ++++ 32 files changed, 1592 insertions(+), 789 deletions(-) rename Documentation/devicetree/bindings/{mmc => power/pwrseq}/mmc-pwrseq-emmc.yaml (100%) rename Documentation/devicetree/bindings/{mmc => power/pwrseq}/mmc-pwrseq-sd8787.yaml (100%) rename Documentation/devicetree/bindings/{mmc => power/pwrseq}/mmc-pwrseq-simple.yaml (100%) delete mode 100644 drivers/mmc/core/pwrseq.c delete mode 100644 drivers/mmc/core/pwrseq.h delete mode 100644 drivers/mmc/core/pwrseq_emmc.c delete mode 100644 drivers/mmc/core/pwrseq_sd8787.c delete mode 100644 drivers/mmc/core/pwrseq_simple.c create mode 100644 drivers/power/pwrseq/Kconfig create mode 100644 drivers/power/pwrseq/Makefile create mode 100644 drivers/power/pwrseq/core.c create mode 100644 drivers/power/pwrseq/pwrseq_emmc.c create mode 100644 drivers/power/pwrseq/pwrseq_qca.c create mode 100644 drivers/power/pwrseq/pwrseq_sd8787.c create mode 100644 drivers/power/pwrseq/pwrseq_simple.c create mode 100644 include/linux/pwrseq/consumer.h create mode 100644 include/linux/pwrseq/driver.h