From mboxrd@z Thu Jan 1 00:00:00 1970 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=-2.9 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 A5F7BC46464 for ; Mon, 13 Aug 2018 13:37:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B58021781 for ; Mon, 13 Aug 2018 13:37:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="CtQ6XKJ1"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="IvyYg7Z2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B58021781 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730060AbeHMQT6 (ORCPT ); Mon, 13 Aug 2018 12:19:58 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:56362 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728427AbeHMQT6 (ORCPT ); Mon, 13 Aug 2018 12:19:58 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 4EC9F60DEA; Mon, 13 Aug 2018 13:37:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1534167458; bh=3PsFwEKgrXMM+aBgw3bivqvZ9OtzpDg0VDNkD5wtjRw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CtQ6XKJ1BwuZsSK3TelIT4ARdc46NUkQRXA13pX5lE9p15W2fze1/bCj0hT9tnsPi iQUSfjfbkMizJbplzkb/66nAQjkp6XP/WM1mT57WDssWV7I6c5E3QgGIe31p/mmP+e pTVUW4i0SMm/dMh02rIqFR8PiSWB6hydUagXXdcA= 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 3F89960C7B; Mon, 13 Aug 2018 13:37:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1534167438; bh=3PsFwEKgrXMM+aBgw3bivqvZ9OtzpDg0VDNkD5wtjRw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IvyYg7Z22bmV3p2f0X+ySFmq3I+m6/quZ+BmK8mDaaXeSitdQMVWFUZA7JMhgKyrd J9VzPVKUJNV8ykw3363z4rD2yWdT8jjUFhvE62E8F9ozk+ItuQ+B1ZuNupBS2mKVW7 XJW5MqSRMura+zgOPPS3CCCySo5tyD1jm3v8eq4o= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3F89960C7B 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: mark.rutland@arm.com, robh@kernel.org, sudeep.holla@arm.com, linux@arm.linux.org.uk, ctatlor97@gmail.com, rjw@rjwysocki.net, viresh.kumar@linaro.org, mturquette@baylibre.com, linux-pm@vger.kernel.org, sboyd@codeaurora.org, linux@armlinux.org.uk, thierry.escande@linaro.org, linux-kernel@vger.kernel.org, david.brown@linaro.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, andy.gross@linaro.org, linux-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, niklas.cassel@linaro.org Cc: sricharan@codeaurora.org Subject: [PATCH 08/14] clk: qcom: Add KPSS ACC/GCC driver Date: Mon, 13 Aug 2018 19:06:01 +0530 Message-Id: <1534167367-17545-9-git-send-email-sricharan@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1534167367-17545-1-git-send-email-sricharan@codeaurora.org> References: <1534167367-17545-1-git-send-email-sricharan@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 66894d2..b17f638 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -262,6 +262,14 @@ 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 82615ed..b9cf068 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -43,4 +43,5 @@ obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o obj-$(CONFIG_SDM_GCC_845) += gcc-sdm845.o obj-$(CONFIG_SDM_VIDEOCC_845) += videocc-sdm845.o obj-$(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"); -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation