From patchwork Mon Feb 14 07:04:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rohit Agarwal X-Patchwork-Id: 12745053 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8BDDC433F5 for ; Mon, 14 Feb 2022 07:04:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241038AbiBNHE2 (ORCPT ); Mon, 14 Feb 2022 02:04:28 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:57122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232616AbiBNHE2 (ORCPT ); Mon, 14 Feb 2022 02:04:28 -0500 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1745E192A4; Sun, 13 Feb 2022 23:04:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1644822261; x=1676358261; h=from:to:cc:subject:date:message-id; bh=a2rqhrwL0QDvqXSOvHL4UMfkkokAk4xYVtEp9iwOwjs=; b=fmkzTAlDStBeB5qeRT+CswXxbxGonIkI4Wrz/YYmiMQZGhEcu3OKbB5j 6qzOvEisVHG8Cpgaf9P6LBcbfsyWsSU3JRVMMDWWsICWQ62iILhElRVcM 8cH7527tadmGSeINfjUeOWZWjGksBum/gMEmjeHLqfL7sBkGNjWPW4hiG Y=; Received: from ironmsg08-lv.qualcomm.com ([10.47.202.152]) by alexa-out.qualcomm.com with ESMTP; 13 Feb 2022 23:04:21 -0800 X-QCInternal: smtphost Received: from ironmsg01-blr.qualcomm.com ([10.86.208.130]) by ironmsg08-lv.qualcomm.com with ESMTP/TLS/AES256-SHA; 13 Feb 2022 23:04:20 -0800 X-QCInternal: smtphost Received: from hu-rohiagar-hyd.qualcomm.com (HELO hu-sgudaval-hyd.qualcomm.com) ([10.213.106.138]) by ironmsg01-blr.qualcomm.com with ESMTP; 14 Feb 2022 12:34:17 +0530 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 3970568) id 462B44473; Mon, 14 Feb 2022 12:34:16 +0530 (+0530) From: Rohit Agarwal To: agross@kernel.org, bjorn.andersson@linaro.org, mturquette@baylibre.com, sboyd@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, Rohit Agarwal Subject: [PATCH 7/8] clk: qcom: Add SDX65 APCS clock controller support Date: Mon, 14 Feb 2022 12:34:07 +0530 Message-Id: <1644822247-27884-1-git-send-email-quic_rohiagar@quicinc.com> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add a driver for the SDX65 APCS clock controller. It is part of the APCS hardware block, which among other things implements also a combined mux and half integer divider functionality. The APCS clock controller has 3 parent clocks: 1. Board XO 2. Fixed rate GPLL0 3. A7 PLL This is required for enabling CPU frequency scaling on SDX65-based platforms. Signed-off-by: Rohit Agarwal --- drivers/clk/qcom/Kconfig | 9 +++ drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/apcs-sdx65.c | 130 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/clk/qcom/apcs-sdx65.c diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index 1904ba1..49e89f8 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -63,6 +63,15 @@ config QCOM_CLK_APCS_SDX55 Say Y if you want to support CPU frequency scaling on devices such as SDX55. +config QCOM_CLK_APCS_SDX65 + tristate "SDX65 APCS Clock Controller" + depends on QCOM_APCS_IPC || COMPILE_TEST + help + Support for the APCS Clock Controller on SDX65 platform. The + APCS is managing the mux and divider which feeds the CPUs. + Say Y if you want to support CPU frequency scaling on devices + such as SDX65. + config QCOM_CLK_RPM tristate "RPM based Clock Controller" depends on MFD_QCOM_RPM diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index 3d855c1..f914f31 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_QCOM_A7PLL) += a7-pll.o obj-$(CONFIG_QCOM_CLK_APCS_MSM8916) += apcs-msm8916.o obj-$(CONFIG_QCOM_CLK_APCC_MSM8996) += clk-cpu-8996.o obj-$(CONFIG_QCOM_CLK_APCS_SDX55) += apcs-sdx55.o +obj-$(CONFIG_QCOM_CLK_APCS_SDX65) += apcs-sdx65.o obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o obj-$(CONFIG_QCOM_CLK_RPMH) += clk-rpmh.o obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o diff --git a/drivers/clk/qcom/apcs-sdx65.c b/drivers/clk/qcom/apcs-sdx65.c new file mode 100644 index 0000000..c0cc16a --- /dev/null +++ b/drivers/clk/qcom/apcs-sdx65.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "clk-regmap.h" +#include "clk-regmap-mux-div.h" + +static const u32 apcs_mux_clk_parent_map[] = { 0, 1, 5 }; + +static const struct clk_parent_data pdata[] = { + { .fw_name = "ref" }, + { .fw_name = "aux" }, + { .fw_name = "pll" }, +}; + +static int a7cc_notifier_cb(struct notifier_block *nb, unsigned long event, + void *data) +{ + int ret = 0; + struct clk_regmap_mux_div *md = container_of(nb, + struct clk_regmap_mux_div, + clk_nb); + if (event == PRE_RATE_CHANGE) + ret = mux_div_set_src_div(md, 1, 2); + + return notifier_from_errno(ret); +} + +static int qcom_apcs_sdx65_clk_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device *parent = dev->parent; + struct device *cpu_dev; + struct clk_regmap_mux_div *a7cc; + struct regmap *regmap; + struct clk_init_data init = { }; + int ret; + + regmap = dev_get_regmap(parent, NULL); + if (!regmap) { + dev_err(dev, "Failed to get parent regmap\n"); + return -ENODEV; + } + + a7cc = devm_kzalloc(dev, sizeof(*a7cc), GFP_KERNEL); + if (!a7cc) + return -ENOMEM; + + init.name = "a7mux"; + init.parent_data = pdata; + init.num_parents = ARRAY_SIZE(pdata); + init.ops = &clk_regmap_mux_div_ops; + + a7cc->clkr.hw.init = &init; + a7cc->clkr.regmap = regmap; + a7cc->reg_offset = 0x8; + a7cc->hid_width = 5; + a7cc->hid_shift = 0; + a7cc->src_width = 3; + a7cc->src_shift = 8; + a7cc->parent_map = apcs_mux_clk_parent_map; + + a7cc->pclk = devm_clk_get(parent, "pll"); + if (IS_ERR(a7cc->pclk)) + return dev_err_probe(dev, PTR_ERR(a7cc->pclk), + "Failed to get PLL clk\n"); + + a7cc->clk_nb.notifier_call = a7cc_notifier_cb; + ret = clk_notifier_register(a7cc->pclk, &a7cc->clk_nb); + if (ret) + return dev_err_probe(dev, ret, + "Failed to register clock notifier\n"); + + ret = devm_clk_register_regmap(dev, &a7cc->clkr); + if (ret) { + dev_err_probe(dev, ret, "Failed to register regmap clock\n"); + goto err; + } + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, + &a7cc->clkr.hw); + if (ret) { + dev_err_probe(dev, ret, "Failed to add clock provider\n"); + goto err; + } + + platform_set_drvdata(pdev, a7cc); + + cpu_dev = get_cpu_device(0); + dev_pm_domain_attach(cpu_dev, true); + + return 0; + +err: + clk_notifier_unregister(a7cc->pclk, &a7cc->clk_nb); + return ret; +} + +static int qcom_apcs_sdx65_clk_remove(struct platform_device *pdev) +{ + struct device *cpu_dev = get_cpu_device(0); + struct clk_regmap_mux_div *a7cc = platform_get_drvdata(pdev); + + clk_notifier_unregister(a7cc->pclk, &a7cc->clk_nb); + dev_pm_domain_detach(cpu_dev, true); + + return 0; +} + +static struct platform_driver qcom_apcs_sdx65_clk_driver = { + .probe = qcom_apcs_sdx65_clk_probe, + .remove = qcom_apcs_sdx65_clk_remove, + .driver = { + .name = "qcom-sdx65-acps-clk", + }, +}; +module_platform_driver(qcom_apcs_sdx65_clk_driver); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Qualcomm SDX65 APCS Clock driver");