From patchwork Wed Jan 4 00:19:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoyou Xie X-Patchwork-Id: 89753 Delivered-To: patch@linaro.org Received: by 10.140.20.101 with SMTP id 92csp8257191qgi; Tue, 3 Jan 2017 16:22:14 -0800 (PST) X-Received: by 10.84.172.67 with SMTP id m61mr138240999plb.60.1483489334454; Tue, 03 Jan 2017 16:22:14 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id f9si45618070plm.292.2017.01.03.16.22.14; Tue, 03 Jan 2017 16:22:14 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966888AbdADAWL (ORCPT + 7 others); Tue, 3 Jan 2017 19:22:11 -0500 Received: from mail-pf0-f170.google.com ([209.85.192.170]:36434 "EHLO mail-pf0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966886AbdADAWJ (ORCPT ); Tue, 3 Jan 2017 19:22:09 -0500 Received: by mail-pf0-f170.google.com with SMTP id 189so79074990pfz.3 for ; Tue, 03 Jan 2017 16:22:09 -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=WuP2igvcrQEQy/xspUUTNItYLgI0uWm0abIiqpO9yaA=; b=KUPn7JAjdRaAmDsYyX/IJtvqvojv6W2ii0s22sBxX/Gr4gT912qY4k9bQs4ofh6/fb rq3mxCqJcFFNMo1BYYf29gZqVQhHnlb4ySaWc11K82nHkaccGbrssvvjhwt9EAh3q13m QLLbXTDy7ISzpKYGz4Qvb82IhEomgV7gou1vg= 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=WuP2igvcrQEQy/xspUUTNItYLgI0uWm0abIiqpO9yaA=; b=bq/ZEnWs9lb2vHSv3c1Aq6vUA4VMgIMj/8yCSRPV1DM8h6qPPzX41ptaO/r/ft1dX4 lATQszmtOhswN+mJAhezhGZuYXR4UKtH9ZFgy6bTc3C5gCj3ycpiPC/yWvlYep9BpDBp CBKrh6BiuZVpyZ768TpjuC0wH2Z1pfJo5ztFngDD6t70MXHLC0Tj8QK5mijyBH8guivs Zz4zk69p8aKy92zsFjmJeHJ97eFqlMTVA/F1xfoSFi085bQIVbrmpTSRB+by1DPwA5Nq I8k/51a3z7yl3kHLw8SNmnzWNpxS+hs8YYlJFUeMBwcuy8JmPzaVvzux2vFgJ80zEA2M 7mqg== X-Gm-Message-State: AIkVDXIrMAMiG+catgG0BVQRIyovlmBZJm3shaMnmwpbyeZZsz0dMQvPNKyiGnk657vE3LVF X-Received: by 10.99.141.67 with SMTP id z64mr118266775pgd.18.1483489328674; Tue, 03 Jan 2017 16:22:08 -0800 (PST) Received: from localhost.localdomain ([104.237.91.58]) by smtp.gmail.com with ESMTPSA id 186sm142418741pfv.61.2017.01.03.16.21.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 03 Jan 2017 16:22:08 -0800 (PST) From: Baoyou Xie To: jun.nie@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, gregkh@linuxfoundation.org, davem@davemloft.net, geert+renesas@glider.be, akpm@linux-foundation.org, mchehab@kernel.org, linux@roeck-us.net, krzk@kernel.org, arnd@arndb.de, linus.walleij@linaro.org, pankaj.dubey@samsung.com, yangbo.lu@nxp.com, f.fainelli@gmail.com, claudiu.manoil@nxp.com, laurent.pinchart+renesas@ideasonboard.com Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, shawnguo@kernel.org, baoyou.xie@linaro.org, xie.baoyou@zte.com.cn, chen.chaokai@zte.com.cn, wang.qiang01@zte.com.cn Subject: [PATCH v5 2/4] soc: zte: pm_domains: Prepare for supporting ARMv8 zx2967 family Date: Wed, 4 Jan 2017 08:19:15 +0800 Message-Id: <1483489157-10782-2-git-send-email-baoyou.xie@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1483489157-10782-1-git-send-email-baoyou.xie@linaro.org> References: <1483489157-10782-1-git-send-email-baoyou.xie@linaro.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The ARMv8 zx2967 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 Reviewed-by: Shawn Guo Reviewed-by: Jun Nie --- drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/zte/Kconfig | 13 ++++ drivers/soc/zte/Makefile | 4 ++ drivers/soc/zte/zx2967_pm_domains.c | 139 ++++++++++++++++++++++++++++++++++++ drivers/soc/zte/zx2967_pm_domains.h | 46 ++++++++++++ 6 files changed, 204 insertions(+) create mode 100644 drivers/soc/zte/Kconfig create mode 100644 drivers/soc/zte/Makefile create mode 100644 drivers/soc/zte/zx2967_pm_domains.c create mode 100644 drivers/soc/zte/zx2967_pm_domains.h -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" 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/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-$(CONFIG_ARCH_ZX) += zte/ diff --git a/drivers/soc/zte/Kconfig b/drivers/soc/zte/Kconfig new file mode 100644 index 0000000..20bde38 --- /dev/null +++ b/drivers/soc/zte/Kconfig @@ -0,0 +1,13 @@ +# +# ZTE SoC drivers +# +menuconfig SOC_ZTE + bool "ZTE SoC driver support" + +if SOC_ZTE + +config ZX2967_PM_DOMAINS + bool "ZX2967 PM domains" + depends on PM_GENERIC_DOMAINS + +endif diff --git a/drivers/soc/zte/Makefile b/drivers/soc/zte/Makefile new file mode 100644 index 0000000..8a37f2f --- /dev/null +++ b/drivers/soc/zte/Makefile @@ -0,0 +1,4 @@ +# +# ZTE SOC drivers +# +obj-$(CONFIG_ZX2967_PM_DOMAINS) += zx2967_pm_domains.o diff --git a/drivers/soc/zte/zx2967_pm_domains.c b/drivers/soc/zte/zx2967_pm_domains.c new file mode 100644 index 0000000..a215875 --- /dev/null +++ b/drivers/soc/zte/zx2967_pm_domains.c @@ -0,0 +1,139 @@ +/* + * Copyright (C) 2017 ZTE Ltd. + * + * Author: Baoyou Xie + * License terms: GNU General Public License (GPL) version 2 + */ +#include +#include +#include +#include + +#include "zx2967_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 zx2967_power_on(struct generic_pm_domain *domain) +{ + struct zx2967_pm_domain *zpd = (struct zx2967_pm_domain *)domain; + unsigned long loop = 1000; + u32 val; + + val = readl_relaxed(pcubase + PCU_DM_PWREN(zpd)); + if (zpd->polarity == PWREN) + val |= BIT(zpd->bit); + else + val &= ~BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_PWREN(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, 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, pcubase + PCU_DM_CLKEN(zpd)); + udelay(5); + + pr_debug("normal poweron %s\n", domain->name); + + return 0; +} + +int zx2967_power_off(struct generic_pm_domain *domain) +{ + struct zx2967_pm_domain *zpd = (struct zx2967_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, 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); + + val = readl_relaxed(pcubase + PCU_DM_PWREN(zpd)); + if (zpd->polarity == PWREN) + val &= ~BIT(zpd->bit); + else + val |= BIT(zpd->bit); + writel_relaxed(val, pcubase + PCU_DM_PWREN(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_debug("normal poweroff %s\n", domain->name); + + return 0; +} + +int zx2967_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); + pcubase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pcubase)) { + dev_err(&pdev->dev, "ioremap fail.\n"); + return PTR_ERR(pcubase); + } + + 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/zx2967_pm_domains.h b/drivers/soc/zte/zx2967_pm_domains.h new file mode 100644 index 0000000..81ad4d6 --- /dev/null +++ b/drivers/soc/zte/zx2967_pm_domains.h @@ -0,0 +1,46 @@ +/* + * Header for ZTE's Power Domain Driver support + * + * Copyright (C) 2017 ZTE Ltd. + * + * Author: Baoyou Xie + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __ZTE_ZX2967_PM_DOMAIN_H +#define __ZTE_ZX2967_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 zx2967_power_polarity { + PWREN, + PWRDN, +}; + +struct zx2967_pm_domain { + struct generic_pm_domain dm; + const u16 bit; + const enum zx2967_power_polarity polarity; + const u16 *reg_offset; +}; + +extern int zx2967_power_on(struct generic_pm_domain *domain); +extern int zx2967_power_off(struct generic_pm_domain *domain); +extern int zx2967_pd_probe(struct platform_device *pdev, + struct generic_pm_domain **zx_pm_domains, + int domain_num); + +#endif /* __ZTE_ZX2967_PM_DOMAIN_H */