From patchwork Wed May 23 02:43:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Collins X-Patchwork-Id: 918708 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=codeaurora.org header.i=@codeaurora.org header.b="T0GZZMHj"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="eNBHk/cE"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40rGzR32DRz9s1d for ; Wed, 23 May 2018 12:43:31 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753441AbeEWCn2 (ORCPT ); Tue, 22 May 2018 22:43:28 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:35270 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752658AbeEWCn1 (ORCPT ); Tue, 22 May 2018 22:43:27 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id AAE7D601E8; Wed, 23 May 2018 02:43:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1527043406; bh=+GPLVTmqIL4gvUC3bXlb39b53gn+yYVq03qY+zw6+5k=; h=From:To:Cc:Subject:Date:From; b=T0GZZMHjEZ0DsYMkXqPVT4fCOAmjvieITrBG8JJ/OE5IxMZmx4HPaNKezqm5zscuA ealQ0CqEnZlPOb0jCfuWIj56XTTACH8F9at9LiyW1ayDb2lT2Bk1pqukylklZZ2ZFi 5ug1wrMl/9tzSSRuUogiizlKu/wrm/VTgIg9Uan0= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED, T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from codeaurora.org (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: collinsd@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 4A2D4601E8; Wed, 23 May 2018 02:43:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1527043405; bh=+GPLVTmqIL4gvUC3bXlb39b53gn+yYVq03qY+zw6+5k=; h=From:To:Cc:Subject:Date:From; b=eNBHk/cE7sYDV6Hu5F0Llr45ihAqTFNw5NS3UfX7dw9U0sSVlPK/t226RU/2PaV3L sYhlqeN5aAzW6ylyGtZQnw1fcH3CcwQFvJyGxuneNz1giRkTTz6XKcijjX+uGp+qM+ pSBq3r7Kth096ory2+JRCDdNxs412Ogt20HAwSYg= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 4A2D4601E8 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=collinsd@codeaurora.org From: David Collins To: broonie@kernel.org, lgirdwood@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: David Collins , linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, rnayak@codeaurora.org, sboyd@kernel.org, dianders@chromium.org Subject: [PATCH v4 0/2] regulator: add QCOM RPMh regulator driver Date: Tue, 22 May 2018 19:43:16 -0700 Message-Id: X-Mailer: git-send-email 1.9.1 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch series adds a driver and device tree binding documentation for PMIC regulator control via Resource Power Manager-hardened (RPMh) on some Qualcomm Technologies, Inc. SoCs such as SDM845. RPMh is a hardware block which contains several accelerators which are used to manage various hardware resources that are shared between the processors of the SoC. The final hardware state of a regulator is determined within RPMh by performing max aggregation of the requests made by all of the processors. The RPMh regulator driver depends upon the RPMh driver [1] and command DB driver [2] which are both still undergoing review. It also depends upon three recent regulator changes: [3], [4], and [5]. Changes since v3 [6]: - Removed support for DT properties qcom,regulator-initial-microvolt and qcom,headroom-microvolt - Renamed DT property qcom,allowed-drms-modes to be qcom,regulator-drms-modes - Updated DT binding documentation to mention which common regulator bindings can be used for qcom-rpmh-regulator devices - Added voltage caching so that voltage requests are only sent to RPMh after the regulator has been enabled at least once - Changed 'voltage_selector' default value to be -ENOTRECOVERABLE to interact with [5] - Initialized 'enabled' to -EINVAL so that unused regulators are disabled by regulator_late_cleanup() - Removed rpmh_regulator_load_default_parameters() as it is no longer needed - Updated the mode usage description in qcom,rpmh-regulator.h Changes since v2 [7]: - Replaced '_' with '-' in device tree supply property names - Renamed qcom_rpmh-regulator.c to be qcom-rpmh-regulator.c - Updated various DT property names to use "microvolt" and "microamp" - Moved allowed modes constraint specification out of the driver [4] - Replaced rpmh_client with device pointer to match new RPMh API [1] - Corrected drms mode threshold checking - Initialized voltage_selector to -EINVAL when not specified in DT - Added constants for PMIC regulator hardware modes - Corrected type sign of mode mapping tables - Made variable names for mode arrays plural - Simplified Kconfig depends on - Removed unnecessary constants and struct fields - Added some descriptive comments Changes since v1 [8]: - Addressed review feedback from Doug, Mark, and Stephen - Replaced set_voltage()/get_voltage() callbacks with set_voltage_sel()/ get_voltage_sel() - Added set_bypass()/get_bypass() callbacks for BOB pass-through mode control - Removed top-level PMIC data structures - Removed initialization variables from structs and passed them as function parameters - Removed various comments and error messages - Simplified mode handling - Refactored per-PMIC rpmh-regulator data specification - Simplified probe function - Moved header into DT patch - Removed redundant property listings from DT binding documentation [1]: https://lkml.org/lkml/2018/5/9/729 [2]: https://lkml.org/lkml/2018/4/10/714 [3]: https://lkml.org/lkml/2018/4/18/556 [4]: https://lkml.org/lkml/2018/5/11/696 [5]: https://lkml.org/lkml/2018/5/15/1005 [6]: https://lkml.org/lkml/2018/5/11/701 [7]: https://lkml.org/lkml/2018/4/13/687 [8]: https://lkml.org/lkml/2018/3/16/1431 David Collins (2): regulator: dt-bindings: add QCOM RPMh regulator bindings regulator: add QCOM RPMh regulator driver .../bindings/regulator/qcom,rpmh-regulator.txt | 185 +++++ drivers/regulator/Kconfig | 9 + drivers/regulator/Makefile | 1 + drivers/regulator/qcom-rpmh-regulator.c | 865 +++++++++++++++++++++ .../dt-bindings/regulator/qcom,rpmh-regulator.h | 36 + 5 files changed, 1096 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt create mode 100644 drivers/regulator/qcom-rpmh-regulator.c create mode 100644 include/dt-bindings/regulator/qcom,rpmh-regulator.h