From patchwork Fri Dec 1 17:02:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 10087507 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C27646037E for ; Fri, 1 Dec 2017 17:04:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B1ADE2A585 for ; Fri, 1 Dec 2017 17:04:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A66512A580; Fri, 1 Dec 2017 17:04:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 380A42A58A for ; Fri, 1 Dec 2017 17:04:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751859AbdLARD5 (ORCPT ); Fri, 1 Dec 2017 12:03:57 -0500 Received: from mail-wm0-f66.google.com ([74.125.82.66]:40511 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751163AbdLARCc (ORCPT ); Fri, 1 Dec 2017 12:02:32 -0500 Received: by mail-wm0-f66.google.com with SMTP id v19so4499341wmh.5 for ; Fri, 01 Dec 2017 09:02:31 -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; bh=1slH2e92voQPdezAs8CuA7K+8aK867LAOOcPdZ4FYTA=; b=HCy4FtAu/pUJkKqesRDxPS/ZDO2HvaD4lU8c/E4YZ+p4RwVekqm0d8nExTVsNyfNRi XEGDyRkixVcfb7/ayq+uW7omekZS8IvB6b/gPV/e4koAKlcIyslue/kVNkbQzDjWhS/0 5vNBUQBuqZYJvB4PvJvRIPqWGGjTzkyGEf7Vo= 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; bh=1slH2e92voQPdezAs8CuA7K+8aK867LAOOcPdZ4FYTA=; b=U9qxGhM9nZGxb2nvqJDXNG5pssQtjN6jSoyiouQ4Y0XQusk1sY6z2yhaaDmn/nnzqe 9UYaGvaPYwNMkOj8hzXn7uWHgFw+ERllfTO14i8KivdD//uQKuZcbu7ItHUJ2u2wCV4t 6t7U2IGG2+gNjyx0CaujxiR60d4RrdpBboymYunLgGOOIBeO2K9KPd9hVw6VEYqIaFBC BC1r0DKWv53osGHBWK4HciL+RTj832XUdt9gXR0FzBBFXW51aS4zTCRvrgMctB8TAW75 HgPiY3onbUeVXAB+BBPAvzuStWUC6BRTjTp+N5PRutUnILcDxqvDjftdRI1jzwASwCD7 BsKA== X-Gm-Message-State: AKGB3mK/YTzpmr++p6vC82pRYXKxxUT+NwPirQfTvTipAza213ihHRTx 7yVVbpCLgkYKqt/QU+dW1Aecmg== X-Google-Smtp-Source: AGs4zMZWMM/uNEJi76Jw/8ZsoOT6ISaP1QK7UuN4NLnqpFqQHj9G47nuuMXAXGUoQe+y2+cfjQatIA== X-Received: by 10.28.215.71 with SMTP id o68mr1643483wmg.105.1512147750592; Fri, 01 Dec 2017 09:02:30 -0800 (PST) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id 2sm1535253wmk.28.2017.12.01.09.02.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 01 Dec 2017 09:02:29 -0800 (PST) From: Georgi Djakov To: sboyd@codeaurora.org, jassisinghbrar@gmail.com, bjorn.andersson@linaro.org, robh@kernel.org Cc: mturquette@baylibre.com, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, georgi.djakov@linaro.org Subject: [PATCH v10 3/6] clk: qcom: Add A53 PLL support Date: Fri, 1 Dec 2017 19:02:21 +0200 Message-Id: <20171201170224.25053-4-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171201170224.25053-1-georgi.djakov@linaro.org> References: <20171201170224.25053-1-georgi.djakov@linaro.org> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The CPUs on Qualcomm MSM8916-based platforms are clocked by two PLLs, a primary (A53) CPU PLL and a secondary fixed-rate GPLL0. These sources are connected to a mux and half-integer divider, which is feeding the CPU cores. This patch adds support for the primary CPU PLL which generates the higher range of frequencies above 1GHz. Signed-off-by: Georgi Djakov Acked-by: Rob Herring Acked-by: Bjorn Andersson --- .../devicetree/bindings/clock/qcom,a53pll.txt | 22 +++++ drivers/clk/qcom/Kconfig | 10 ++ drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/a53-pll.c | 109 +++++++++++++++++++++ 4 files changed, 142 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/qcom,a53pll.txt create mode 100644 drivers/clk/qcom/a53-pll.c -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/clock/qcom,a53pll.txt b/Documentation/devicetree/bindings/clock/qcom,a53pll.txt new file mode 100644 index 000000000000..e3fa8118eaee --- /dev/null +++ b/Documentation/devicetree/bindings/clock/qcom,a53pll.txt @@ -0,0 +1,22 @@ +Qualcomm MSM8916 A53 PLL Binding +-------------------------------- +The A53 PLL on MSM8916 platforms is the main CPU PLL used used for frequencies +above 1GHz. + +Required properties : +- compatible : Shall contain only one of the following: + + "qcom,msm8916-a53pll" + +- reg : shall contain base register location and length + +- #clock-cells : must be set to <0> + +Example: + + a53pll: clock@b016000 { + compatible = "qcom,msm8916-a53pll"; + reg = <0xb016000 0x40>; + #clock-cells = <0>; + }; + diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index 9f6c278deead..81ac7b9378fe 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -12,6 +12,16 @@ config COMMON_CLK_QCOM select REGMAP_MMIO select RESET_CONTROLLER +config QCOM_A53PLL + bool "MSM8916 A53 PLL" + depends on COMMON_CLK_QCOM + default ARCH_QCOM + help + Support for the A53 PLL on MSM8916 devices. It provides + the CPU with frequencies above 1GHz. + Say Y if you want to support higher CPU frequencies on MSM8916 + devices. + config QCOM_CLK_RPM tristate "RPM based Clock Controller" depends on COMMON_CLK_QCOM && MFD_QCOM_RPM diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index 26410d31446b..e767c60c24ec 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -32,5 +32,6 @@ obj-$(CONFIG_MSM_LCC_8960) += lcc-msm8960.o obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o obj-$(CONFIG_MSM_MMCC_8996) += mmcc-msm8996.o +obj-$(CONFIG_QCOM_A53PLL) += a53-pll.o obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o diff --git a/drivers/clk/qcom/a53-pll.c b/drivers/clk/qcom/a53-pll.c new file mode 100644 index 000000000000..b2bb8e9437f1 --- /dev/null +++ b/drivers/clk/qcom/a53-pll.c @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2017, Linaro Limited + * Copyright (c) 2014, The Linux Foundation. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include +#include +#include +#include + +#include "clk-pll.h" +#include "clk-regmap.h" + +static const struct pll_freq_tbl a53pll_freq[] = { + { 998400000, 52, 0x0, 0x1, 0 }, + { 1094400000, 57, 0x0, 0x1, 0 }, + { 1152000000, 62, 0x0, 0x1, 0 }, + { 1209600000, 63, 0x0, 0x1, 0 }, + { 1248000000, 65, 0x0, 0x1, 0 }, + { 1363200000, 71, 0x0, 0x1, 0 }, + { 1401600000, 73, 0x0, 0x1, 0 }, +}; + +static const struct regmap_config a53pll_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0x40, + .fast_io = true, +}; + +static int qcom_a53pll_remove(struct platform_device *pdev) +{ + of_clk_del_provider(pdev->dev.of_node); + return 0; +} + +static int qcom_a53pll_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct regmap *regmap; + struct resource *res; + struct clk_pll *pll; + void __iomem *base; + struct clk_init_data init = { }; + int ret; + + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return -ENOMEM; + + 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(dev, base, &a53pll_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + pll->l_reg = 0x04; + pll->m_reg = 0x08; + pll->n_reg = 0x0c; + pll->config_reg = 0x14; + pll->mode_reg = 0x00; + pll->status_reg = 0x1c; + pll->status_bit = 16; + pll->freq_tbl = a53pll_freq; + + init.name = "a53pll"; + init.parent_names = (const char *[]){ "xo" }; + init.num_parents = 1; + init.ops = &clk_pll_sr2_ops; + init.flags = CLK_IS_CRITICAL; + pll->clkr.hw.init = &init; + + ret = devm_clk_register_regmap(dev, &pll->clkr); + if (ret) { + dev_err(dev, "failed to register regmap clock: %d\n", ret); + return ret; + } + + ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, + &pll->clkr.hw); + if (ret) { + dev_err(dev, "failed to add clock provider: %d\n", ret); + return ret; + } + + return 0; +} + +static const struct of_device_id qcom_a53pll_match_table[] = { + { .compatible = "qcom,msm8916-a53pll" }, + { } +}; + +static struct platform_driver qcom_a53pll_driver = { + .probe = qcom_a53pll_probe, + .remove = qcom_a53pll_remove, + .driver = { + .name = "qcom-a53pll", + .of_match_table = qcom_a53pll_match_table, + }, +}; + +builtin_platform_driver(qcom_a53pll_driver);