From patchwork Mon May 4 06:20:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sivaprakash Murugesan X-Patchwork-Id: 189308 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 C793AC3A5A9 for ; Mon, 4 May 2020 06:21:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B1B4021775 for ; Mon, 4 May 2020 06:21:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727786AbgEDGUe (ORCPT ); Mon, 4 May 2020 02:20:34 -0400 Received: from alexa-out-sd-02.qualcomm.com ([199.106.114.39]:3330 "EHLO alexa-out-sd-02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726910AbgEDGUc (ORCPT ); Mon, 4 May 2020 02:20:32 -0400 Received: from unknown (HELO ironmsg05-sd.qualcomm.com) ([10.53.140.145]) by alexa-out-sd-02.qualcomm.com with ESMTP; 03 May 2020 23:20:31 -0700 Received: from sivaprak-linux.qualcomm.com ([10.201.3.202]) by ironmsg05-sd.qualcomm.com with ESMTP; 03 May 2020 23:20:28 -0700 Received: by sivaprak-linux.qualcomm.com (Postfix, from userid 459349) id C736321738; Mon, 4 May 2020 11:50:26 +0530 (IST) From: Sivaprakash Murugesan To: agross@kernel.org, bjorn.andersson@linaro.org, mturquette@baylibre.com, sboyd@kernel.org, robh+dt@kernel.org, jassisinghbrar@gmail.com, linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sivaprakash Murugesan Subject: [PATCH V4 3/8] clk: qcom: Add ipq apss pll driver Date: Mon, 4 May 2020 11:50:19 +0530 Message-Id: <1588573224-3038-4-git-send-email-sivaprak@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1588573224-3038-1-git-send-email-sivaprak@codeaurora.org> References: <1588573224-3038-1-git-send-email-sivaprak@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The CPUs on Qualcomm ipq based devices are clocked by an alpha PLL. Add support for the apss pll found on ipq based devices which can support CPU frequencies above 1Ghz. Signed-off-by: Sivaprakash Murugesan --- drivers/clk/qcom/Kconfig | 8 ++++ drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/apss-ipq-pll.c | 97 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 106 insertions(+) create mode 100644 drivers/clk/qcom/apss-ipq-pll.c diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index 11ec6f4..e70aa01 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -89,6 +89,14 @@ config APQ_MMCC_8084 Say Y if you want to support multimedia devices such as display, graphics, video encode/decode, camera, etc. +config IPQ_APSS_PLL + tristate "IPQ APSS PLL" + help + Support for APSS PLL on ipq devices. The APSS PLL is the main + clock that feeds the CPUs on ipq based devices. + Say Y if you want to support CPU frequency scaling on ipq based + devices. + config IPQ_GCC_4019 tristate "IPQ4019 Global Clock Controller" help diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index 691efbf..b4a6ba1 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -19,6 +19,7 @@ clk-qcom-$(CONFIG_QCOM_GDSC) += gdsc.o # Keep alphabetically sorted by config obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o obj-$(CONFIG_APQ_MMCC_8084) += mmcc-apq8084.o +obj-$(CONFIG_IPQ_APSS_PLL) += apss-ipq-pll.o obj-$(CONFIG_IPQ_GCC_4019) += gcc-ipq4019.o obj-$(CONFIG_IPQ_GCC_6018) += gcc-ipq6018.o obj-$(CONFIG_IPQ_GCC_806X) += gcc-ipq806x.o diff --git a/drivers/clk/qcom/apss-ipq-pll.c b/drivers/clk/qcom/apss-ipq-pll.c new file mode 100644 index 0000000..0b08655 --- /dev/null +++ b/drivers/clk/qcom/apss-ipq-pll.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018, The Linux Foundation. All rights reserved. +#include +#include +#include + +#include "clk-alpha-pll.h" + +static const u8 ipq_pll_offsets[] = { + [PLL_OFF_L_VAL] = 0x08, + [PLL_OFF_ALPHA_VAL] = 0x10, + [PLL_OFF_USER_CTL] = 0x18, + [PLL_OFF_CONFIG_CTL] = 0x20, + [PLL_OFF_CONFIG_CTL_U] = 0x24, + [PLL_OFF_STATUS] = 0x28, + [PLL_OFF_TEST_CTL] = 0x30, + [PLL_OFF_TEST_CTL_U] = 0x34, +}; + +static struct clk_alpha_pll ipq_pll = { + .offset = 0x0, + .regs = ipq_pll_offsets, + .flags = SUPPORTS_DYNAMIC_UPDATE, + .clkr = { + .enable_reg = 0x0, + .enable_mask = BIT(0), + .hw.init = &(struct clk_init_data){ + .name = "a53pll", + .parent_data = &(const struct clk_parent_data) { + .fw_name = "xo", + }, + .num_parents = 1, + .ops = &clk_alpha_pll_huayra_ops, + }, + }, +}; + +static const struct alpha_pll_config ipq_pll_config = { + .l = 0x37, + .config_ctl_val = 0x04141200, + .config_ctl_hi_val = 0x0, + .early_output_mask = BIT(3), + .main_output_mask = BIT(0), +}; + +static const struct regmap_config ipq_pll_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0x40, + .fast_io = true, +}; + +static int apss_ipq_pll_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct regmap *regmap; + struct resource *res; + void __iomem *base; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + regmap = devm_regmap_init_mmio(&pdev->dev, base, + &ipq_pll_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + clk_alpha_pll_configure(&ipq_pll, regmap, &ipq_pll_config); + + ret = devm_clk_register_regmap(dev, &ipq_pll.clkr); + if (ret) + return ret; + + return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, + &ipq_pll.clkr.hw); +} + +static const struct of_device_id apss_ipq_pll_match_table[] = { + { .compatible = "qcom,ipq-apss-pll" }, + { } +}; + +static struct platform_driver apss_ipq_pll_driver = { + .probe = apss_ipq_pll_probe, + .driver = { + .name = "qcom-ipq-apss-pll", + .of_match_table = apss_ipq_pll_match_table, + }, +}; +module_platform_driver(apss_ipq_pll_driver); + +MODULE_DESCRIPTION("Qualcomm technology Inc APSS ALPHA PLL Driver"); +MODULE_LICENSE("GPL v2");