From patchwork Mon Jan 16 10:56:34 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoyou Xie X-Patchwork-Id: 91554 Delivered-To: patch@linaro.org Received: by 10.140.20.99 with SMTP id 90csp1364431qgi; Mon, 16 Jan 2017 03:00:45 -0800 (PST) X-Received: by 10.98.14.84 with SMTP id w81mr27732109pfi.168.1484564445562; Mon, 16 Jan 2017 03:00:45 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id v5si2735865pgv.254.2017.01.16.03.00.45; Mon, 16 Jan 2017 03:00:45 -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 sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751374AbdAPLAn (ORCPT + 7 others); Mon, 16 Jan 2017 06:00:43 -0500 Received: from mail-pf0-f169.google.com ([209.85.192.169]:34610 "EHLO mail-pf0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751166AbdAPLAj (ORCPT ); Mon, 16 Jan 2017 06:00:39 -0500 Received: by mail-pf0-f169.google.com with SMTP id e4so14554242pfg.1 for ; Mon, 16 Jan 2017 03:00:39 -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=hCQ/a6JeFI3bpJ3pMw0tkXOofuGUYHc3UXORpeTVUww=; b=ZidWVl3brXab3UcreMvLnd0ZzOiRQmnPGew1AT4TOuhK5Ej0ep+CFqfwpOgC+v80S5 eyNVgwyqCzmqCDh1NP7JbolXkXfdDsEJQ3F4h36mYISdeCLgLlK9fA4ABnMW1pGBcDY9 FMD5efQFTLmEG+sXU8IcjpXUopD+eZAoZbf0M= 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=hCQ/a6JeFI3bpJ3pMw0tkXOofuGUYHc3UXORpeTVUww=; b=Zbf3R+kNBy68JUl/zfFmUvZYgaCa0V3uO5wz4K9+ZeK0/2brhG2oOknH/zBR+WOqyy mX1nM2SoCZHtacyAwiJKuFKtHg9grLby6s1jnpN8AynPSoAmdhM5mzmubvpbZI29Mg9Q woVqJYj2J23f5+/cVuj0rdVbHi9qmfvwr3z+s9nKPt6lbRZdSvpWcnjXphHrR+Vcd6G0 ieGZ/sIVFKPAIuS8TzqlxAN54iAW4Mf4d9pqgIaSk4BeQ1N1V8h6fTXkZu1q99CCUyrw evt9pWmKR3+IqcknKgvq3C7MTDnxnkctLk8JZJ0ylitURJOL7+yffYdbMuPRQ7kObS+R zTxw== X-Gm-Message-State: AIkVDXIrs/GWyLsSTRf4CHpg63tf8dcUt0vjt5ZewhNjob/YvRcPeHAzJFdK9O6Zh/sDPcul X-Received: by 10.99.174.75 with SMTP id e11mr38907810pgp.89.1484564439159; Mon, 16 Jan 2017 03:00:39 -0800 (PST) Received: from localhost.localdomain ([104.237.91.166]) by smtp.gmail.com with ESMTPSA id n25sm46805238pfi.33.2017.01.16.03.00.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 16 Jan 2017 03:00:38 -0800 (PST) From: Baoyou Xie To: jun.nie@linaro.org, p.zabel@pengutronix.de, robh+dt@kernel.org, mark.rutland@arm.com Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@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 v2 3/3] reset: zx2967: add reset controller driver for ZTE's zx2967 family Date: Mon, 16 Jan 2017 18:56:34 +0800 Message-Id: <1484564194-18530-3-git-send-email-baoyou.xie@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1484564194-18530-1-git-send-email-baoyou.xie@linaro.org> References: <1484564194-18530-1-git-send-email-baoyou.xie@linaro.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch adds reset controller driver for ZTE's zx2967 family. Signed-off-by: Baoyou Xie --- drivers/reset/Kconfig | 6 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-zx2967.c | 125 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 132 insertions(+) create mode 100644 drivers/reset/reset-zx2967.c -- 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/reset/Kconfig b/drivers/reset/Kconfig index 172dc96..f4cdfe9 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -86,6 +86,12 @@ config RESET_UNIPHIER Say Y if you want to control reset signals provided by System Control block, Media I/O block, Peripheral Block. +config RESET_ZX2967 + bool "ZTE ZX2967 Reset Driver" + depends on ARCH_ZX || COMPILE_TEST + help + This enables the reset controller driver for ZTE's zx2967 family. + config RESET_ZYNQ bool "ZYNQ Reset Driver" if COMPILE_TEST default ARCH_ZYNQ diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 13b346e..2cd3f6c 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -13,4 +13,5 @@ obj-$(CONFIG_RESET_STM32) += reset-stm32.o obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o obj-$(CONFIG_TI_SYSCON_RESET) += reset-ti-syscon.o obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o +obj-$(CONFIG_RESET_ZX2967) += reset-zx2967.o obj-$(CONFIG_RESET_ZYNQ) += reset-zynq.o diff --git a/drivers/reset/reset-zx2967.c b/drivers/reset/reset-zx2967.c new file mode 100644 index 0000000..bc95261 --- /dev/null +++ b/drivers/reset/reset-zx2967.c @@ -0,0 +1,125 @@ +/* + * ZTE's zx2967 family reset controller driver + * + * Copyright (C) 2017 ZTE Ltd. + * + * Author: Baoyou Xie + * + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include + +struct zx2967_reset { + void __iomem *reg_base; + spinlock_t lock; + struct reset_controller_dev rcdev; +}; + +static int zx2967_reset_act(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct zx2967_reset *reset = NULL; + u32 bank = id / 32; + u32 offset = id % 32; + u32 reg; + unsigned long flags; + + reset = container_of(rcdev, struct zx2967_reset, rcdev); + + spin_lock_irqsave(&reset->lock, flags); + + reg = readl(reset->reg_base + (bank * 4)); + if (assert) + reg &= ~BIT(offset); + else + reg |= BIT(offset); + writel(reg, reset->reg_base + (bank * 4)); + + spin_unlock_irqrestore(&reset->lock, flags); + + return 0; +} + +static int zx2967_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return zx2967_reset_act(rcdev, id, true); +} + +static int zx2967_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return zx2967_reset_act(rcdev, id, false); +} + +static struct reset_control_ops zx2967_reset_ops = { + .assert = zx2967_reset_assert, + .deassert = zx2967_reset_deassert, +}; + +static int zx2967_reset_probe(struct platform_device *pdev) +{ + struct zx2967_reset *reset; + struct resource *res; + + reset = devm_kzalloc(&pdev->dev, sizeof(*reset), GFP_KERNEL); + if (!reset) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reset->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(reset->reg_base)) + return PTR_ERR(reset->reg_base); + + spin_lock_init(&reset->lock); + + reset->rcdev.owner = THIS_MODULE; + reset->rcdev.nr_resets = resource_size(res) * 8; + reset->rcdev.ops = &zx2967_reset_ops; + reset->rcdev.of_node = pdev->dev.of_node; + + dev_info(&pdev->dev, "reset controller cnt:%d", + reset->rcdev.nr_resets); + + return devm_reset_controller_register(&pdev->dev, &reset->rcdev); +} + +static int zx2967_reset_remove(struct platform_device *pdev) +{ + return 0; +} + +static const struct of_device_id zx2967_reset_dt_ids[] = { + { .compatible = "zte,zx296718-reset", }, + {}, +}; +MODULE_DEVICE_TABLE(of, zx2967_reset_dt_ids); + +static struct platform_driver zx2967_reset_driver = { + .probe = zx2967_reset_probe, + .remove = zx2967_reset_remove, + .driver = { + .name = "zx2967-reset", + .of_match_table = zx2967_reset_dt_ids, + }, +}; + +static int __init zx2967_reset_init(void) +{ + return platform_driver_register(&zx2967_reset_driver); +} +arch_initcall(zx2967_reset_init); + +static void __exit zx2967_reset_exit(void) +{ + platform_driver_unregister(&zx2967_reset_driver); +} +module_exit(zx2967_reset_exit); + +MODULE_AUTHOR("Baoyou Xie "); +MODULE_DESCRIPTION("ZTE zx2967 Reset Controller Driver"); +MODULE_LICENSE("GPL");