From patchwork Wed Dec 7 06:13:22 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoyou Xie X-Patchwork-Id: 86968 Delivered-To: patch@linaro.org Received: by 10.140.20.101 with SMTP id 92csp162056qgi; Tue, 6 Dec 2016 22:14:22 -0800 (PST) X-Received: by 10.99.44.84 with SMTP id s81mr118490354pgs.153.1481091262644; Tue, 06 Dec 2016 22:14:22 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id h1si22869349plh.10.2016.12.06.22.14.22; Tue, 06 Dec 2016 22:14:22 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752492AbcLGGOT (ORCPT + 25 others); Wed, 7 Dec 2016 01:14:19 -0500 Received: from mail-pf0-f170.google.com ([209.85.192.170]:33176 "EHLO mail-pf0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059AbcLGGOS (ORCPT ); Wed, 7 Dec 2016 01:14:18 -0500 Received: by mail-pf0-f170.google.com with SMTP id d2so75255694pfd.0 for ; Tue, 06 Dec 2016 22:14:17 -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; bh=E5krbyrFeBdqccXbUyW5S2aHbSsik6WvB4Gw760UBig=; b=MWGKRqorPGRTE7oI5g06PgY+5/PXjjoFTkV1xkwHP2IszyARhk4yKB5qbJnOSW4tYG Kf0iEWQ4NWHCNtEQP42byqrwWCDT845KeAXtd1fGDkf8uos43H9QmwHhfG7C885QLVv1 TmJDAaml2IpQpohrDiE66gI12mYpGO4bRNEVQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=E5krbyrFeBdqccXbUyW5S2aHbSsik6WvB4Gw760UBig=; b=L0xnHznCDzl679OGqA+xjd3jmJfooAdg/Lwr0m317KXtY11mhVzjEEbcwmsbtg2+pJ Saw6xIkPBCLvBsxhfv7AIDmtPzLPBDGIFSYSEv6fLzSRGwZmB5c8EDZWj1tFJatC3k+E awvZdsrY/wLsOcM9S6UecPDZPgjkiogp+05HDOUJiABzs3O/IT9PDl6wz/iaWVbsTURV /Vzx2yFuCHL4ZdvqIWMMUCxQsh+F4zndfKC955V8bD+0UW7mBk877YfBkUXXqY5EACZ/ MaauTU4sZiOL2Lt24fkGsMHIXw/6AgOwzjr+O+ZelueEquhzJTE0K+NtrOCOcpQZ+NTy /JAA== X-Gm-Message-State: AKaTC00qxziXT/fkO66yEyS868FBayUAJAEiaq3w0WNxAb0+hOA6KZ4c0QpDVK5eSDYhglfn X-Received: by 10.84.202.163 with SMTP id x32mr144766593pld.44.1481091257086; Tue, 06 Dec 2016 22:14:17 -0800 (PST) Received: from localhost.localdomain ([171.214.159.137]) by smtp.gmail.com with ESMTPSA id p14sm6471624pfl.74.2016.12.06.22.14.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 06 Dec 2016 22:14:16 -0800 (PST) From: Baoyou Xie To: jun.nie@linaro.org, baoyou.xie@linaro.org, gregkh@linuxfoundation.org, davem@davemloft.net, geert+renesas@glider.be, akpm@linux-foundation.org, mchehab@kernel.org, linux@roeck-us.net, ulf.hansson@linaro.org, krzk@kernel.org, oss@buserror.net, arnd@arndb.de, amitdanielk@gmail.com, aar@pengutronix.de, f.fainelli@gmail.com, qiang.zhao@nxp.com, claudiu.manoil@nxp.com, pankaj.dubey@samsung.com, yangbo.lu@nxp.com, scott.branden@broadcom.com, rmk+kernel@armlinux.org.uk Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shawnguo@kernel.org, xie.baoyou@zte.com.cn, chen.chaokai@zte.com.cn, wang.qiang01@zte.com.cn Subject: [PATCH v3 1/3] soc: zte: pm_domains: Prepare for supporting ARMv8 2967 family Date: Wed, 7 Dec 2016 14:13:22 +0800 Message-Id: <1481091204-6559-1-git-send-email-baoyou.xie@linaro.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The ARMv8 2967 family (296718, 296716 etc) uses different value for controlling the power domain on/off registers, Choose the value depending on the compatible. Multiple domains are prepared for the family, this patch prepares the common functions. Signed-off-by: Baoyou Xie --- drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/zte/Kconfig | 13 ++++ drivers/soc/zte/Makefile | 4 ++ drivers/soc/zte/pm_domains.c | 150 +++++++++++++++++++++++++++++++++++++++++++ drivers/soc/zte/pm_domains.h | 48 ++++++++++++++ 6 files changed, 217 insertions(+) create mode 100644 drivers/soc/zte/Kconfig create mode 100644 drivers/soc/zte/Makefile create mode 100644 drivers/soc/zte/pm_domains.c create mode 100644 drivers/soc/zte/pm_domains.h -- 2.7.4 diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index f31bceb..f09023f 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -11,5 +11,6 @@ source "drivers/soc/tegra/Kconfig" source "drivers/soc/ti/Kconfig" source "drivers/soc/ux500/Kconfig" source "drivers/soc/versatile/Kconfig" +source "drivers/soc/zte/Kconfig" endmenu diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 50c23d0..05eae52 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -16,3 +16,4 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_SOC_TI) += ti/ obj-$(CONFIG_ARCH_U8500) += ux500/ obj-$(CONFIG_PLAT_VERSATILE) += versatile/ +obj-$(CONFIG_ARCH_ZX) += zte/ diff --git a/drivers/soc/zte/Kconfig b/drivers/soc/zte/Kconfig new file mode 100644 index 0000000..4953c3fa --- /dev/null +++ b/drivers/soc/zte/Kconfig @@ -0,0 +1,13 @@ +# +# zx SoC drivers +# +menuconfig SOC_ZX + bool "zx SoC driver support" + +if SOC_ZX + +config ZX_PM_DOMAINS + bool "zx PM domains" + depends on PM_GENERIC_DOMAINS + +endif diff --git a/drivers/soc/zte/Makefile b/drivers/soc/zte/Makefile new file mode 100644 index 0000000..97ac8ea --- /dev/null +++ b/drivers/soc/zte/Makefile @@ -0,0 +1,4 @@ +# +# zx SOC drivers +# +obj-$(CONFIG_ZX_PM_DOMAINS) += pm_domains.o diff --git a/drivers/soc/zte/pm_domains.c b/drivers/soc/zte/pm_domains.c new file mode 100644 index 0000000..e4d1235 --- /dev/null +++ b/drivers/soc/zte/pm_domains.c @@ -0,0 +1,150 @@ +/* + * Copyright (C) 2015 ZTE Ltd. + * + * Author: Baoyou Xie + * License terms: GNU General Public License (GPL) version 2 + */ +#include +#include +#include +#include +#include "pm_domains.h" + +#define PCU_DM_CLKEN(zpd) ((zpd)->reg_offset[REG_CLKEN]) +#define PCU_DM_ISOEN(zpd) ((zpd)->reg_offset[REG_ISOEN]) +#define PCU_DM_RSTEN(zpd) ((zpd)->reg_offset[REG_RSTEN]) +#define PCU_DM_PWREN(zpd) ((zpd)->reg_offset[REG_PWREN]) +#define PCU_DM_PWRDN(zpd) ((zpd)->reg_offset[REG_PWRDN]) +#define PCU_DM_ACK_SYNC(zpd) ((zpd)->reg_offset[REG_ACK_SYNC]) + +static void __iomem *pcubase; + +int zx_normal_power_on(struct generic_pm_domain *domain) +{ + struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain; + unsigned long loop = 1000; + u32 val; + + if (zpd->polarity == PWREN) { + val = readl_relaxed(pcubase + PCU_DM_PWREN(zpd)); + val |= BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_PWREN(zpd)); + } else { + val = readl_relaxed(pcubase + PCU_DM_PWRDN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_PWRDN(zpd)); + } + + do { + udelay(1); + val = readl_relaxed(pcubase + PCU_DM_ACK_SYNC(zpd)) + & BIT(zpd->bit); + } while (--loop && !val); + + if (!loop) { + pr_err("Error: %s %s fail\n", __func__, domain->name); + return -EIO; + } + + val = readl_relaxed(pcubase + PCU_DM_RSTEN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_RSTEN(zpd)); + udelay(5); + + val = readl_relaxed(pcubase + PCU_DM_ISOEN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_ISOEN(zpd)); + udelay(5); + + val = readl_relaxed(pcubase + PCU_DM_CLKEN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_CLKEN(zpd)); + udelay(5); + + pr_info("normal poweron %s\n", domain->name); + + return 0; +} + +int zx_normal_power_off(struct generic_pm_domain *domain) +{ + struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain; + unsigned long loop = 1000; + u32 val; + + val = readl_relaxed(pcubase + PCU_DM_CLKEN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_CLKEN(zpd)); + udelay(5); + + val = readl_relaxed(pcubase + PCU_DM_ISOEN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_ISOEN(zpd)); + udelay(5); + + val = readl_relaxed(pcubase + PCU_DM_RSTEN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_RSTEN(zpd)); + udelay(5); + + if (zpd->polarity == PWREN) { + val = readl_relaxed(pcubase + PCU_DM_PWREN(zpd)); + val &= ~BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_PWREN(zpd)); + } else { + val = readl_relaxed(pcubase + PCU_DM_PWRDN(zpd)); + val |= BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_PWRDN(zpd)); + } + + do { + udelay(1); + val = readl_relaxed(pcubase + PCU_DM_ACK_SYNC(zpd)) + & BIT(zpd->bit); + } while (--loop && val); + + if (!loop) { + pr_err("Error: %s %s fail\n", __func__, domain->name); + return -EIO; + } + + pr_info("normal poweroff %s\n", domain->name); + + return 0; +} + +int +zx_pd_probe(struct platform_device *pdev, + struct generic_pm_domain **zx_pm_domains, + int domain_num) +{ + struct genpd_onecell_data *genpd_data; + struct resource *res; + int i; + + genpd_data = devm_kzalloc(&pdev->dev, sizeof(*genpd_data), GFP_KERNEL); + if (!genpd_data) + return -ENOMEM; + + genpd_data->domains = zx_pm_domains; + genpd_data->num_domains = domain_num; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no memory resource defined\n"); + return -ENODEV; + } + + pcubase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pcubase)) { + dev_err(&pdev->dev, "ioremap fail.\n"); + return -EIO; + } + + for (i = 0; i < domain_num; ++i) + pm_genpd_init(zx_pm_domains[i], NULL, false); + + of_genpd_add_provider_onecell(pdev->dev.of_node, genpd_data); + dev_info(&pdev->dev, "powerdomain init ok\n"); + return 0; +} diff --git a/drivers/soc/zte/pm_domains.h b/drivers/soc/zte/pm_domains.h new file mode 100644 index 0000000..d3a52fd --- /dev/null +++ b/drivers/soc/zte/pm_domains.h @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015 ZTE Co., Ltd. + * http://www.zte.com.cn + * + * Header for ZTE's Power Domain Driver support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ZTE_PM_DOMAIN_H +#define __ZTE_PM_DOMAIN_H + +#include +#include + +enum { + REG_CLKEN, + REG_ISOEN, + REG_RSTEN, + REG_PWREN, + REG_PWRDN, + REG_ACK_SYNC, + + /* The size of the array - must be last */ + REG_ARRAY_SIZE, +}; + +enum zx_power_polarity { + PWREN, + PWRDN, +}; + +struct zx_pm_domain { + struct generic_pm_domain dm; + const u16 bit; + const enum zx_power_polarity polarity; + const u16 *reg_offset; +}; + +extern int zx_normal_power_on(struct generic_pm_domain *domain); +extern int zx_normal_power_off(struct generic_pm_domain *domain); +extern int +zx_pd_probe(struct platform_device *pdev, + struct generic_pm_domain **zx_pm_domains, + int domain_num); +#endif /* __ZTE_PM_DOMAIN_H */