From patchwork Mon Jan 4 08:11:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11996293 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 BE2D6C433DB for ; Mon, 4 Jan 2021 08:13:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EE9920784 for ; Mon, 4 Jan 2021 08:13:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726308AbhADINl (ORCPT ); Mon, 4 Jan 2021 03:13:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726505AbhADINk (ORCPT ); Mon, 4 Jan 2021 03:13:40 -0500 Received: from mail-pg1-x531.google.com (mail-pg1-x531.google.com [IPv6:2607:f8b0:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DB72C0617A9 for ; Mon, 4 Jan 2021 00:11:59 -0800 (PST) Received: by mail-pg1-x531.google.com with SMTP id c22so18567988pgg.13 for ; Mon, 04 Jan 2021 00:11:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=9oCBXEeItNyLdmXrVsfC7b3QROxgUzyHxaMFoVN3rtU=; b=hDEUNdAPJAtX++LhX22u+wNGUejjDE3QtoLzFGtKdF7HXXIxaXhOLHsrhp03rg5V/n +IDIrrysw1k0ISM1TcTAJnTjp2xYV0krvwNYP+t7BR3o0KKzjJSqe3AJ/LWGIHAaJ2n7 boFOf0AvtZ3SQ2IY57IzUfM2k+Ve9sHwuaY9hDhB+abS5UHLpJtMnVew150/1chRYl4a 3qKWDVcwOcV6/4x6Px3+BS/DDZ26XSLZLN1LxJwo9D8I0LNIvVc0+jpCOfLQonbW4ycx H18QB+NVqwx2N98Pkyq21hLHOKkVInAcux1eKarBboNmtBjyQjFlpjJCXvPcHBv+lEA4 Nejw== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=9oCBXEeItNyLdmXrVsfC7b3QROxgUzyHxaMFoVN3rtU=; b=c/aQ00i34xtk8G0pra9OfWqBEaWhwxAHfZp8jfjbQrZNJ5dp6qtwFZXMzFo8wO0et9 99sRh0TxXParlqRSN4o14PS05HMLHCjkht9A50vrQfyppUhqiqAaeLDN/bOmG0qXTx1R TyLF43ivOs/mEjzozhtFifTYNz6JJWHIq/XmvKv8B0w+s3hNB2Z49MMH0iRdX5U3PEfC LwIj28tXu35RvXrhzYZWfu/0r5lc1Z1JmaVFCn6jf6avxHbPns9tV9m7NDyKDY5JIrqe AbqZJylScL9EpRUV+bzxa6FOFJniVO2N9Qn8JE8nFrkUq3bv6qatzUwk3tBRX7thBZQz ghBQ== X-Gm-Message-State: AOAM532aq2OCjgZMOSKHNvBT9RWQVXXWSdxbJ2VX8zrAe546tL5BX70d 9bcg/q7ctQJ6dK1D4FUUFVBv X-Google-Smtp-Source: ABdhPJwUHjiqIxuEhe8OSMHowC/PaOq86NbHf8v11huUtIh61+qm9ixhKtBb4F3zIAoAq8gyXSad7Q== X-Received: by 2002:a62:87c9:0:b029:1a5:9d56:7e24 with SMTP id i192-20020a6287c90000b02901a59d567e24mr64204861pfe.56.1609747918870; Mon, 04 Jan 2021 00:11:58 -0800 (PST) Received: from localhost.localdomain ([103.77.37.160]) by smtp.gmail.com with ESMTPSA id n7sm55051339pfn.141.2021.01.04.00.11.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Jan 2021 00:11:58 -0800 (PST) From: Manivannan Sadhasivam To: mturquette@baylibre.com, sboyd@kernel.org, robh+dt@kernel.org, jassisinghbrar@gmail.com Cc: viresh.kumar@linaro.org, ulf.hansson@linaro.org, bjorn.andersson@linaro.org, agross@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH 4/5] clk: qcom: Add A7 PLL support Date: Mon, 4 Jan 2021 13:41:24 +0530 Message-Id: <20210104081125.147300-5-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210104081125.147300-1-manivannan.sadhasivam@linaro.org> References: <20210104081125.147300-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Add support for PLL found in Qualcomm SDX55 platforms which is used to provide clock to the Cortex A7 CPU via a mux. This PLL can provide high frequency clock to the CPU above 1GHz as compared to the other sources like GPLL0. In this driver, the power domain is attached to the cpudev. This is required for CPUFreq functionality and there seems to be no better place to do other than this driver (no dedicated CPUFreq driver). Signed-off-by: Manivannan Sadhasivam --- drivers/clk/qcom/Kconfig | 8 +++ drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/a7-pll.c | 100 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 109 insertions(+) create mode 100644 drivers/clk/qcom/a7-pll.c diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index d32bb12cd8d0..d6f4aee4427a 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -28,6 +28,14 @@ config QCOM_A53PLL Say Y if you want to support higher CPU frequencies on MSM8916 devices. +config QCOM_A7PLL + tristate "SDX55 A7 PLL" + help + Support for the A7 PLL on SDX55 devices. It provides the CPU with + frequencies above 1GHz. + Say Y if you want to support higher CPU frequencies on SDX55 + devices. + config QCOM_CLK_APCS_MSM8916 tristate "MSM8916 APCS Clock Controller" depends on QCOM_APCS_IPC || COMPILE_TEST diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index 9e5e0e3cb7b4..e7e0ac382176 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -44,6 +44,7 @@ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o obj-$(CONFIG_MSM_MMCC_8996) += mmcc-msm8996.o obj-$(CONFIG_MSM_MMCC_8998) += mmcc-msm8998.o obj-$(CONFIG_QCOM_A53PLL) += a53-pll.o +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_RPM) += clk-rpm.o diff --git a/drivers/clk/qcom/a7-pll.c b/drivers/clk/qcom/a7-pll.c new file mode 100644 index 000000000000..e171d3caf2cf --- /dev/null +++ b/drivers/clk/qcom/a7-pll.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Qualcomm A7 PLL driver + * + * Copyright (c) 2020, Linaro Limited + * Author: Manivannan Sadhasivam + */ + +#include +#include +#include +#include + +#include "clk-alpha-pll.h" + +#define LUCID_PLL_OFF_L_VAL 0x04 + +static const struct pll_vco lucid_vco[] = { + { 249600000, 2000000000, 0 }, +}; + +static struct clk_alpha_pll a7pll = { + .offset = 0x100, + .vco_table = lucid_vco, + .num_vco = ARRAY_SIZE(lucid_vco), + .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID], + .clkr = { + .hw.init = &(struct clk_init_data){ + .name = "a7pll", + .parent_data = &(const struct clk_parent_data){ + .fw_name = "bi_tcxo", + }, + .num_parents = 1, + .ops = &clk_alpha_pll_lucid_ops, + }, + }, +}; + +static const struct alpha_pll_config a7pll_config = { + .l = 0x39, + .config_ctl_val = 0x20485699, + .config_ctl_hi_val = 0x2261, + .config_ctl_hi1_val = 0x029A699C, + .user_ctl_val = 0x1, + .user_ctl_hi_val = 0x805, +}; + +static const struct regmap_config a7pll_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0x1000, + .fast_io = true, +}; + +static int qcom_a7pll_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct regmap *regmap; + void __iomem *base; + u32 l_val; + int ret; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + regmap = devm_regmap_init_mmio(dev, base, &a7pll_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + /* Configure PLL only if the l_val is zero */ + regmap_read(regmap, a7pll.offset + LUCID_PLL_OFF_L_VAL, &l_val); + if (!l_val) + clk_lucid_pll_configure(&a7pll, regmap, &a7pll_config); + + ret = devm_clk_register_regmap(dev, &a7pll.clkr); + if (ret) + return ret; + + return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, + &a7pll.clkr.hw); +} + +static const struct of_device_id qcom_a7pll_match_table[] = { + { .compatible = "qcom,sdx55-a7pll" }, + { } +}; + +static struct platform_driver qcom_a7pll_driver = { + .probe = qcom_a7pll_probe, + .driver = { + .name = "qcom-a7pll", + .of_match_table = qcom_a7pll_match_table, + }, +}; +module_platform_driver(qcom_a7pll_driver); + +MODULE_DESCRIPTION("Qualcomm A7 PLL Driver"); +MODULE_LICENSE("GPL v2");