From patchwork Mon Aug 3 09:35:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 11697799 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C27CC14B7 for ; Mon, 3 Aug 2020 09:45:16 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9B2DD20722 for ; Mon, 3 Aug 2020 09:45:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="zT8Ie8rP"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="q9Qu3btp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9B2DD20722 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=walle.cc Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zvciI3aGsTSV+n7S21ZJfK0Jh//Ltgyv344MbmhhJto=; b=zT8Ie8rPYHJcb1SlAw8som7da LVhveSP+Hn3R3j5XLe5RnhrwahPmFsJ+QcAmjd2kKQ6pIuO/uAtBJaUY/Y7EWZOWzPXUtcIgwuDi0 qAF8BRQy550HY/ejOJ/8hK33i9DYO5cKoUQB8rlKjKARgVMvciOPL1E5lzTKfR9eIGfJEqRYVI2vQ 57E7HqOdzyhkkg8WiWRFp0T8sfBI94A1wMW2gSGWuF9c6LJPq6O5p5EbcUfQtZ7l7m64eIZBxxbNk abVOxcZm/QBCr/aVEF996YWKagREw17n7QoYla+EnxQTnHc3uVu+ni33FLxhXbrxod8yX1PeGKuQZ Lc3OzH5lA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k2Wzl-0008PJ-D6; Mon, 03 Aug 2020 09:43:01 +0000 Received: from ssl.serverraum.org ([2a01:4f8:151:8464::1:2]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k2WzT-0008Dp-Nj for linux-arm-kernel@lists.infradead.org; Mon, 03 Aug 2020 09:42:47 +0000 Received: from mwalle01.sab.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 2F58923E44; Mon, 3 Aug 2020 11:42:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1596447758; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LTNURoT62lgE6Qd3OeqKKh+i+lgcL1aXrQtabBSYfcU=; b=q9Qu3btpARtCQfdqlq66nrpW5/ij89PlMN8UntF+0Po6Y9KkuLTi+qgtqM4n7T8idim8QZ yT+DGfvfwZmyN4wDJ5033vDePGY1XYoSXqPLJJK8FMqrQj4gtveVUW8VMETMWae0PZW2jC uDtamjA3AHsLJH6NLSV4ZX/2LX8+Nlo= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v7 04/13] irqchip: add sl28cpld interrupt controller support Date: Mon, 3 Aug 2020 11:35:50 +0200 Message-Id: <20200803093559.12289-5-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200803093559.12289-1-michael@walle.cc> References: <20200803093559.12289-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200803_054244_108768_8AFF9EDE X-CRM114-Status: GOOD ( 25.03 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [2a01:4f8:151:8464:0:0:1:2 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marc Zyngier , Jean Delvare , Catalin Marinas , Jason Cooper , Will Deacon , Greg Kroah-Hartman , Shawn Guo , Linus Walleij , Andy Shevchenko , Li Yang , Bartosz Golaszewski , Michael Walle , Rob Herring , Thierry Reding , Mark Brown , Pavel Machek , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Thomas Gleixner , Wim Van Sebroeck , Lee Jones , Guenter Roeck Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add support for the interrupt controller inside the sl28 CPLD management controller. The interrupt controller can handle at most 8 interrupts and is really simplistic and consists only of an interrupt mask and an interrupt pending register. Signed-off-by: Michael Walle Acked-by: Marc Zyngier --- Changes since v6: - none Changes since v5: - none Changes since v4: - update copyright year - don't use "int irq" instead of "unsigne int irq", because platform_get_irq() might return a negative error code. Found by "kernel test robot - remove comma in terminator line of the compatible strings list, suggested by Andy - use newer devm_regmap_add_irq_chip_fwnode() - don't use KBUID_MODNAME, suggested by Andy - remove the platform device table Changes since v3: - see cover letter drivers/irqchip/Kconfig | 8 +++ drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-sl28cpld.c | 96 ++++++++++++++++++++++++++++++++++ 3 files changed, 105 insertions(+) create mode 100644 drivers/irqchip/irq-sl28cpld.c diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index bb70b7177f94..977bd7bcfe5c 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -246,6 +246,14 @@ config RENESAS_RZA1_IRQC Enable support for the Renesas RZ/A1 Interrupt Controller, to use up to 8 external interrupts with configurable sense select. +config SL28CPLD_INTC + bool "Kontron sl28cpld IRQ controller" + select MFD_SIMPLE_MFD_I2C + select REGMAP_IRQ + help + Interrupt controller driver for the board management controller + found on the Kontron sl28 CPLD. + config ST_IRQCHIP bool select REGMAP diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 133f9c45744a..39af7d89204d 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -111,3 +111,4 @@ obj-$(CONFIG_LOONGSON_HTPIC) += irq-loongson-htpic.o obj-$(CONFIG_LOONGSON_HTVEC) += irq-loongson-htvec.o obj-$(CONFIG_LOONGSON_PCH_PIC) += irq-loongson-pch-pic.o obj-$(CONFIG_LOONGSON_PCH_MSI) += irq-loongson-pch-msi.o +obj-$(CONFIG_SL28CPLD_INTC) += irq-sl28cpld.o diff --git a/drivers/irqchip/irq-sl28cpld.c b/drivers/irqchip/irq-sl28cpld.c new file mode 100644 index 000000000000..0aa50d025ef6 --- /dev/null +++ b/drivers/irqchip/irq-sl28cpld.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * sl28cpld interrupt controller driver + * + * Copyright 2020 Kontron Europe GmbH + */ + +#include +#include +#include +#include +#include +#include +#include + +#define INTC_IE 0x00 +#define INTC_IP 0x01 + +static const struct regmap_irq sl28cpld_irqs[] = { + REGMAP_IRQ_REG_LINE(0, 8), + REGMAP_IRQ_REG_LINE(1, 8), + REGMAP_IRQ_REG_LINE(2, 8), + REGMAP_IRQ_REG_LINE(3, 8), + REGMAP_IRQ_REG_LINE(4, 8), + REGMAP_IRQ_REG_LINE(5, 8), + REGMAP_IRQ_REG_LINE(6, 8), + REGMAP_IRQ_REG_LINE(7, 8), +}; + +struct sl28cpld_intc { + struct regmap *regmap; + struct regmap_irq_chip chip; + struct regmap_irq_chip_data *irq_data; +}; + +static int sl28cpld_intc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sl28cpld_intc *irqchip; + int irq; + u32 base; + int ret; + + if (!dev->parent) + return -ENODEV; + + irqchip = devm_kzalloc(dev, sizeof(*irqchip), GFP_KERNEL); + if (!irqchip) + return -ENOMEM; + + irqchip->regmap = dev_get_regmap(dev->parent, NULL); + if (!irqchip->regmap) + return -ENODEV; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = device_property_read_u32(&pdev->dev, "reg", &base); + if (ret) + return -EINVAL; + + irqchip->chip.name = "sl28cpld-intc"; + irqchip->chip.irqs = sl28cpld_irqs; + irqchip->chip.num_irqs = ARRAY_SIZE(sl28cpld_irqs); + irqchip->chip.num_regs = 1; + irqchip->chip.status_base = base + INTC_IP; + irqchip->chip.mask_base = base + INTC_IE; + irqchip->chip.mask_invert = true, + irqchip->chip.ack_base = base + INTC_IP; + + return devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev), + irqchip->regmap, irq, + IRQF_SHARED | IRQF_ONESHOT, 0, + &irqchip->chip, + &irqchip->irq_data); +} + +static const struct of_device_id sl28cpld_intc_of_match[] = { + { .compatible = "kontron,sl28cpld-intc" }, + {} +}; +MODULE_DEVICE_TABLE(of, sl28cpld_intc_of_match); + +static struct platform_driver sl28cpld_intc_driver = { + .probe = sl28cpld_intc_probe, + .driver = { + .name = "sl28cpld-intc", + .of_match_table = sl28cpld_intc_of_match, + } +}; +module_platform_driver(sl28cpld_intc_driver); + +MODULE_DESCRIPTION("sl28cpld Interrupt Controller Driver"); +MODULE_AUTHOR("Michael Walle "); +MODULE_LICENSE("GPL");