From patchwork Tue Feb 27 14:06:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sricharan Ramabadhran X-Patchwork-Id: 10245395 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 E7A3360211 for ; Tue, 27 Feb 2018 14:12:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D734A26419 for ; Tue, 27 Feb 2018 14:12:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CB3412890C; Tue, 27 Feb 2018 14:12:12 +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 3B59426419 for ; Tue, 27 Feb 2018 14:12:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753806AbeB0OL5 (ORCPT ); Tue, 27 Feb 2018 09:11:57 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:54894 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753432AbeB0OIe (ORCPT ); Tue, 27 Feb 2018 09:08:34 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id ACC8660851; Tue, 27 Feb 2018 14:08:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1519740514; bh=eekOTMQfZEDJsVQevAzDAewaQTJX2dR3AJFRs95oQK4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=JB4Rw0ndjUbJVGO+ajAkY7JQBkpF9i4CKKZkOhaDG3sKZGWEXPzRMTwoiwIrqaGk+ ifrsXQ4+qTB2uNnl4XgzAg1WQMPxZ8HT6xFPqA5CEueeBifQN685TSzWkGdx0rnW9D 7w44WWUjNgH8/EuFAAULSPGIfFOOK7hILnazPWjg= Received: from srichara-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sricharan@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 4B5D360F6D; Tue, 27 Feb 2018 14:08:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1519740510; bh=eekOTMQfZEDJsVQevAzDAewaQTJX2dR3AJFRs95oQK4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=NhWGHI38JVLPP9ys6os/9S67etJj32u59v4a12oIJT57AQAm/grLEHkJeP1FaciOu thj4ONYjoQiHHYUC8+MBn6HcfLEPmeuJJvP5mmhT2NtHZ+B5720aq+Sy0FA142uouW 5p17AeLGYBSHBxraWEz6pOpTvj399K2Ah0DvIP+U= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 4B5D360F6D 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=sricharan@codeaurora.org From: Sricharan R To: viresh.kumar@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, mturquette@baylibre.com, sboyd@codeaurora.org, linux@armlinux.org.uk, andy.gross@linaro.org, david.brown@linaro.org, rjw@rjwysocki.net, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-pm@vger.kernel.org, robh@kernel.org, sricharan@codeaurora.org, linux@arm.linux.org.uk Subject: [PATCH v8 09/15] clk: qcom: Add KPSS ACC/GCC driver Date: Tue, 27 Feb 2018 19:36:56 +0530 Message-Id: <1519740422-3835-10-git-send-email-sricharan@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1519740422-3835-1-git-send-email-sricharan@codeaurora.org> References: <1519740422-3835-1-git-send-email-sricharan@codeaurora.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 From: Stephen Boyd The ACC and GCC regions present in KPSSv1 contain registers to control clocks and power to each Krait CPU and L2. For CPUfreq purposes probe these devices and expose a mux clock that chooses between PXO and PLL8. Cc: Signed-off-by: Stephen Boyd --- drivers/clk/qcom/Kconfig | 8 +++++ drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/kpss-xcc.c | 87 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 96 insertions(+) create mode 100644 drivers/clk/qcom/kpss-xcc.c diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index bf14f56..8fca65d 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -235,6 +235,14 @@ config QCOM_HFPLL Say Y if you want to support CPU frequency scaling on devices such as MSM8974, APQ8084, etc. +config KPSS_XCC + tristate "KPSS Clock Controller" + depends on COMMON_CLK_QCOM + help + Support for the Krait ACC and GCC clock controllers. Say Y + if you want to support CPU frequency scaling on devices such + as MSM8960, APQ8064, etc. + config KRAIT_CLOCKS bool select KRAIT_L2_ACCESSORS diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index e1e96f6..24e598a 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -40,4 +40,5 @@ obj-$(CONFIG_QCOM_CLK_APCS_MSM8916) += apcs-msm8916.o obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o +obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o obj-$(CONFIG_QCOM_HFPLL) += hfpll.o diff --git a/drivers/clk/qcom/kpss-xcc.c b/drivers/clk/qcom/kpss-xcc.c new file mode 100644 index 0000000..8590b5e --- /dev/null +++ b/drivers/clk/qcom/kpss-xcc.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018, The Linux Foundation. All rights reserved. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static const char *aux_parents[] = { + "pll8_vote", + "pxo", +}; + +static unsigned int aux_parent_map[] = { + 3, + 0, +}; + +static const struct of_device_id kpss_xcc_match_table[] = { + { .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL }, + { .compatible = "qcom,kpss-gcc" }, + {} +}; +MODULE_DEVICE_TABLE(of, kpss_xcc_match_table); + +static int kpss_xcc_driver_probe(struct platform_device *pdev) +{ + const struct of_device_id *id; + struct clk *clk; + struct resource *res; + void __iomem *base; + const char *name; + + id = of_match_device(kpss_xcc_match_table, &pdev->dev); + if (!id) + return -ENODEV; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (id->data) { + if (of_property_read_string_index(pdev->dev.of_node, + "clock-output-names", + 0, &name)) + return -ENODEV; + base += 0x14; + } else { + name = "acpu_l2_aux"; + base += 0x28; + } + + clk = clk_register_mux_table(&pdev->dev, name, aux_parents, + ARRAY_SIZE(aux_parents), 0, base, 0, 0x3, + 0, aux_parent_map, NULL); + + platform_set_drvdata(pdev, clk); + + return PTR_ERR_OR_ZERO(clk); +} + +static int kpss_xcc_driver_remove(struct platform_device *pdev) +{ + clk_unregister_mux(platform_get_drvdata(pdev)); + return 0; +} + +static struct platform_driver kpss_xcc_driver = { + .probe = kpss_xcc_driver_probe, + .remove = kpss_xcc_driver_remove, + .driver = { + .name = "kpss-xcc", + .of_match_table = kpss_xcc_match_table, + }, +}; +module_platform_driver(kpss_xcc_driver); + +MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:kpss-xcc");