From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08990310636; Mon, 27 Oct 2025 12:36:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761568608; cv=none; b=qWKRnx7PIjXPDzaVlT+lj2cU8gKaXE9GxZ7Em/9N+FsSpTj+O0Xyurt4+9TWtmqyiKb9bDJ0S/ak0ndDan4M/SdxQ8cHQWWKKqv2Jn+Wq1avGZmTmpJ6ODaweB8FrqA2UOHuvznZTOiplGYnrlkeoSH2eODrg3afw5zsGktd/5w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761568608; c=relaxed/simple; bh=i73+J+5YWXR9D7KoiVDvvYVCvPEX+KIaI7mvprlvhU4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Qou3KUCBuUrSZm/R17z3F5kBj5mKQ0DTJ6FGZDFWXEJFSBsK4SSJVaWCu5rRqa5ysDjNg2GfWFASzmhTqNCvpqrFBdo+5KH2ONyGcoc5FUymFYtvOf1jJVHjP1yt7F43atoJ4PXGnwTSMs3UcnavIT+DEEx3d8SuYPmL8EXxak4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=aWz5rmWZ; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="aWz5rmWZ" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 7AE761A16B1; Mon, 27 Oct 2025 12:36:45 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 4F78A6062C; Mon, 27 Oct 2025 12:36:45 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 966A6102F2500; Mon, 27 Oct 2025 13:36:42 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1761568604; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=VfnUueWfAVRAV/x6hFQ9mn2fIhY2mVl6MuXPrlj2o2w=; b=aWz5rmWZ/RkSEnfqEyCXsYr1npcDijDuTItI0e/BwXLWGsARov/NMeMYKIc/KB+QmfAH9o SO0BbaO/52c2ILTbPjDP/CaPzV0786Nx5JlmDY5oIy2aYUMleHfEarw2eZbzlmLLF/eJMg upCwE7RqqPx2JnNpE8ClHTnAeV4QrS3Ltg9PYjOJNq5AcjqtMNEhUK3CrVDREoQaPFLyXi Cbnk9U++CJNZSoSFc22xzmRodFhUmO7WfkSWt99S1J0fJbI4xzx1Hs56p9KKctgb1J2TkU 7zgA0+u9ALGduaL+dn4JveGxBFxfkO576AnxYVb5sNRUDUFMIoa1vYpeWoFmfw== From: "Herve Codina (Schneider Electric)" To: Thomas Gleixner , Wolfram Sang , Hoan Tran , Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm , Saravana Kannan , Serge Semin , Herve Codina Cc: Phil Edworthy , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Pascal Eberhard , Miquel Raynal , Thomas Petazzoni Subject: [PATCH v6 7/8] soc: renesas: Add support for Renesas RZ/N1 GPIO Interrupt Multiplexer Date: Mon, 27 Oct 2025 13:35:59 +0100 Message-ID: <20251027123601.77216-8-herve.codina@bootlin.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251027123601.77216-1-herve.codina@bootlin.com> References: <20251027123601.77216-1-herve.codina@bootlin.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 On the Renesas RZ/N1 SoC, GPIOs can generate interruptions. Those interruption lines are multiplexed by the GPIO Interrupt Multiplexer in order to map 32 * 3 GPIO interrupt lines to 8 GIC interrupt lines. The GPIO interrupt multiplexer IP does nothing but select 8 GPIO IRQ lines out of the 96 available to wire them to the GIC input lines. Signed-off-by: Herve Codina (Schneider Electric) --- drivers/soc/renesas/Kconfig | 4 + drivers/soc/renesas/Makefile | 1 + drivers/soc/renesas/rzn1_irqmux.c | 133 ++++++++++++++++++++++++++++++ 3 files changed, 138 insertions(+) create mode 100644 drivers/soc/renesas/rzn1_irqmux.c diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig index 340a1ff7e92b..71865778b058 100644 --- a/drivers/soc/renesas/Kconfig +++ b/drivers/soc/renesas/Kconfig @@ -62,6 +62,7 @@ config ARCH_RZN1 select PM select PM_GENERIC_DOMAINS select ARM_AMBA + select RZN1_IRQMUX if ARM && ARCH_RENESAS @@ -459,6 +460,9 @@ config PWC_RZV2M config RST_RCAR bool "Reset Controller support for R-Car" if COMPILE_TEST +config RZN1_IRQMUX + bool "Renesas RZ/N1 GPIO IRQ multiplexer support" if COMPILE_TEST + config SYSC_RZ bool "System controller for RZ SoCs" if COMPILE_TEST select MFD_SYSCON diff --git a/drivers/soc/renesas/Makefile b/drivers/soc/renesas/Makefile index 3bdcc6a395d5..33d44d964d61 100644 --- a/drivers/soc/renesas/Makefile +++ b/drivers/soc/renesas/Makefile @@ -14,4 +14,5 @@ obj-$(CONFIG_SYS_R9A09G057) += r9a09g057-sys.o # Family obj-$(CONFIG_PWC_RZV2M) += pwc-rzv2m.o obj-$(CONFIG_RST_RCAR) += rcar-rst.o +obj-$(CONFIG_RZN1_IRQMUX) += rzn1_irqmux.o obj-$(CONFIG_SYSC_RZ) += rz-sysc.o diff --git a/drivers/soc/renesas/rzn1_irqmux.c b/drivers/soc/renesas/rzn1_irqmux.c new file mode 100644 index 000000000000..b4b43aa3e496 --- /dev/null +++ b/drivers/soc/renesas/rzn1_irqmux.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * RZ/N1 GPIO Interrupt Multiplexer + * + * Copyright 2025 Schneider Electric + * Author: Herve Codina + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Up to 8 output lines are connected to GIC SPI interrupt controller + * starting at IRQ 103. + */ +#define RZN1_IRQMUX_GIC_SPI_BASE 103 +#define RZN1_IRQMUX_NUM_OUTPUTS 8 + +static int rzn1_irqmux_parent_args_to_line_index(struct device *dev, + const struct of_phandle_args *parent_args) +{ + /* + * The parent interrupt should be one of the GIC controller. + * Three arguments must be provided. + * - args[0]: GIC_SPI + * - args[1]: The GIC interrupt number + * - args[2]: The interrupt flags + * + * We retrieve the line index based on the GIC interrupt number + * provided. + */ + + if (parent_args->args_count != 3 || + parent_args->args[0] != GIC_SPI) { + dev_err(dev, "Invalid interrupt-map item\n"); + return -EINVAL; + } + + if (parent_args->args[1] < RZN1_IRQMUX_GIC_SPI_BASE || + parent_args->args[1] >= RZN1_IRQMUX_GIC_SPI_BASE + RZN1_IRQMUX_NUM_OUTPUTS) { + dev_err(dev, "Invalid GIC interrupt %u\n", parent_args->args[1]); + return -EINVAL; + } + + return parent_args->args[1] - RZN1_IRQMUX_GIC_SPI_BASE; +} + +static int rzn1_irqmux_setup(struct device *dev, struct device_node *np, u32 __iomem *regs) +{ + DECLARE_BITMAP(index_done, RZN1_IRQMUX_NUM_OUTPUTS) = {}; + struct of_imap_parser imap_parser; + struct of_imap_item imap_item; + int index; + int ret; + u32 tmp; + + /* We support only #interrupt-cells = <1> and #address-cells = <0> */ + ret = of_property_read_u32(np, "#interrupt-cells", &tmp); + if (ret) + return ret; + if (tmp != 1) + return -EINVAL; + + ret = of_property_read_u32(np, "#address-cells", &tmp); + if (ret) + return ret; + if (tmp != 0) + return -EINVAL; + + ret = of_imap_parser_init(&imap_parser, np, &imap_item); + if (ret) + return ret; + + for_each_of_imap_item(&imap_parser, &imap_item) { + index = rzn1_irqmux_parent_args_to_line_index(dev, &imap_item.parent_args); + if (index < 0) { + of_node_put(imap_item.parent_args.np); + return index; + } + + if (test_and_set_bit(index, index_done)) { + of_node_put(imap_item.parent_args.np); + dev_err(dev, "Mux output line already defined\n"); + return -EINVAL; + } + + /* + * The child #address-cells is 0 (already checked). The first + * value in imap item is the src hwirq. + */ + writel(imap_item.child_imap[0], regs + index); + } + + return 0; +} + +static int rzn1_irqmux_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + u32 __iomem *regs; + + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + return rzn1_irqmux_setup(dev, np, regs); +} + +static const struct of_device_id rzn1_irqmux_of_match[] = { + { .compatible = "renesas,rzn1-gpioirqmux", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rzn1_irqmux_of_match); + +static struct platform_driver rzn1_irqmux_driver = { + .probe = rzn1_irqmux_probe, + .driver = { + .name = "rzn1_irqmux", + .of_match_table = rzn1_irqmux_of_match, + }, +}; +module_platform_driver(rzn1_irqmux_driver); + +MODULE_AUTHOR("Herve Codina "); +MODULE_DESCRIPTION("Renesas RZ/N1 GPIO IRQ Multiplexer Driver"); +MODULE_LICENSE("GPL"); -- 2.51.0