From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) (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 521302EE97E; Fri, 25 Jul 2025 15:26:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753457196; cv=none; b=WOEKnjzWBKqHQD5E7qLrETLx9QPGruTsYjIz9ibxAgFW67CEJCEcD4CyxXrBFoK2bT4KWWzI9QZWRGmUoYvuDmqWLBQ4d0Lht/KzUIJU5MVp3LeMtFCvRbnMtyglYXQH642FqMiAG69cbY3XT10VR47F4owVqLi/8v76cM9TS/E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753457196; c=relaxed/simple; bh=/ZcV+0GPdJthrvYhyoNts6nK/br1ORNPwUM6PWdxMvg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eqTRGAacrNSLoTfrWOQWoonm5en4XIsVqA0QZxrOhweKsLbswnWVjXTlQT8il9bm2+Zjt8UGOsklMbB+y55jgbZekCTPVYAkiFVgN5JM2nqZ5feRCCLmazora3qgk1D/tPOLdiU1mA3HeRrsecQB0vabj16aHEHaupgfBWHMGtA= 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=cVmWSZuV; arc=none smtp.client-ip=217.70.183.198 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="cVmWSZuV" Received: by mail.gandi.net (Postfix) with ESMTPA id AC24B442B7; Fri, 25 Jul 2025 15:26:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1753457191; 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=+2bVnURAI35njT7CHzoVAKYMvlvIjGI7coGMmmFm+tk=; b=cVmWSZuVUD4d/BzyZ2P3M3yN57ldaaR296hxd9KdXEzno4up4DcxsTf3A/AtiMNowyL3M2 Hd0TMhxKNfi5WShO8d12RijLrFow8LbayKFJ902n/dPF/KjmsdvGSs1h7DlcYquf6rOOCr wvJZdrToVGj7WW+BXcxj1wW0sgeKr8th+6vVNNuQbxQp2LBpmj+G0fjrPLLKmRjVNQzGD/ bArBSEw83AWbhAH6XqNtTFSHwCqQ5+r4PttVt3iyl6YnqnxToBhmsb5s7Ori0bEpxQKjxu GPrwNZfOE9Dfnx48lX6W34wWT4UifAM7A6GzRJIC4CuvfdMmXgkLGIWkzMAbWw== From: Herve Codina To: 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, Miquel Raynal , Thomas Petazzoni Subject: [PATCH 5/6] soc: renesas: Add support for Renesas RZ/N1 GPIO Interrupt Multiplexer Date: Fri, 25 Jul 2025 17:26:14 +0200 Message-ID: <20250725152618.32886-6-herve.codina@bootlin.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250725152618.32886-1-herve.codina@bootlin.com> References: <20250725152618.32886-1-herve.codina@bootlin.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdefgdekfeekkecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepjfgvrhhvvgcuvehoughinhgruceohhgvrhhvvgdrtghoughinhgrsegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeehffeigfejueelueeuffelueefgfelhfejhfehieegudekteeiledttdfhffekffenucfkphepledtrdekledrudeifedruddvjeenucevlhhushhtvghrufhiiigvpedvnecurfgrrhgrmhepihhnvghtpeeltddrkeelrdduieefrdduvdejpdhhvghloheplhhotggrlhhhohhsthdrlhhotggrlhguohhmrghinhdpmhgrihhlfhhrohhmpehhvghrvhgvrdgtohguihhnrgessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepudekpdhrtghpthhtohephhhorghnsehoshdrrghmphgvrhgvtghomhhpuhhtihhnghdrtghomhdprhgtphhtthhopehlihhnuhhsrdifrghllhgvihhjsehlihhnrghrohdrohhrghdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtoheprhhosghhsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehkrhiikhdoughtsehkvghrnhgvlhdrohhrghdprhgtphhtt hhopegtohhnohhrodgutheskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepghgvvghrthdorhgvnhgvshgrshesghhlihguvghrrdgsvgdprhgtphhtthhopehmrghgnhhushdruggrmhhmsehgmhgrihhlrdgtohhm X-GND-Sasl: herve.codina@bootlin.com 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 --- drivers/soc/renesas/Kconfig | 4 + drivers/soc/renesas/Makefile | 1 + drivers/soc/renesas/rzn1_irqmux.c | 169 ++++++++++++++++++++++++++++++ 3 files changed, 174 insertions(+) create mode 100644 drivers/soc/renesas/rzn1_irqmux.c diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig index fbc3b69d21a7..9e8ac33052fb 100644 --- a/drivers/soc/renesas/Kconfig +++ b/drivers/soc/renesas/Kconfig @@ -58,6 +58,7 @@ config ARCH_RZN1 select PM select PM_GENERIC_DOMAINS select ARM_AMBA + select RZN1_IRQMUX if ARM && ARCH_RENESAS @@ -435,6 +436,9 @@ 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 diff --git a/drivers/soc/renesas/Makefile b/drivers/soc/renesas/Makefile index 3bdcc6a395d5..daa932c7698d 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..37e41c2b9104 --- /dev/null +++ b/drivers/soc/renesas/rzn1_irqmux.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * RZ/N1 GPIO Interrupt Multiplexer + * + * Copyright 2025 Schneider Electric + * Author: Herve Codina + */ + +#include +#include +#include +#include +#include + +#define IRQMUX_MAX_IRQS 8 + +static int irqmux_is_phandle_args_equal(const struct of_phandle_args *a, + const struct of_phandle_args *b) +{ + int i; + + if (a->np != b->np) + return false; + + if (a->args_count != b->args_count) + return false; + + for (i = 0; i < a->args_count; i++) { + if (a->args[i] != b->args[i]) + return false; + } + + return true; +} + +static int irqmux_find_interrupt_index(struct device *dev, struct device_node *np, + const struct of_phandle_args *expected_irq) +{ + struct of_phandle_args out_irq; + bool is_equal; + int ret; + int i; + + for (i = 0; i < IRQMUX_MAX_IRQS; i++) { + ret = of_irq_parse_one(np, i, &out_irq); + if (ret) + return ret; + + is_equal = irqmux_is_phandle_args_equal(expected_irq, &out_irq); + of_node_put(out_irq.np); + if (is_equal) + return i; + } + + return -ENOENT; +} + +struct irqmux_cb_data { + struct device_node *np; + struct device *dev; + u32 __iomem *regs; +}; + +static int irqmux_imap_cb(void *data, const __be32 *imap, + const struct of_phandle_args *parent_args) +{ + struct irqmux_cb_data *priv = data; + u32 src_hwirq; + int index; + + /* + * The child #address-cells is 0. Already checked in irqmux_setup(). + * The first value in imap is the src_hwirq + */ + src_hwirq = be32_to_cpu(*imap); + + /* + * Get the index in our interrupt array that matches the parent in the + * interrupt-map + */ + index = irqmux_find_interrupt_index(priv->dev, priv->np, parent_args); + if (index < 0) + return dev_err_probe(priv->dev, index, "output interrupt not found\n"); + + dev_info(priv->dev, "interrupt %u mapped to output interrupt[%u]\n", + src_hwirq, index); + + /* + * Our interrupt array items matches 1:1 the interrupt lines that could + * be configured by registers (same order, same number). + * Configure the related register with the src hwirq retrieved from the + * interrupt-map. + */ + writel(src_hwirq, priv->regs + index); + + return 0; +} + +static int irqmux_setup(struct device *dev, struct device_node *np, u32 __iomem *regs) +{ + struct irqmux_cb_data cb_data; + u32 tmp; + int ret; + + /* 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; + + cb_data.dev = dev; + cb_data.regs = regs; + cb_data.np = np; + return of_irq_foreach_imap(np, irqmux_imap_cb, &cb_data); +} + +static int irqmux_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + u32 __iomem *regs; + int nr_irqs; + int ret; + + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + nr_irqs = of_irq_count(np); + if (nr_irqs < 0) + return nr_irqs; + + if (nr_irqs > IRQMUX_MAX_IRQS) { + dev_err(dev, "too many output interrupts\n"); + return -ENOENT; + } + + ret = irqmux_setup(dev, np, regs); + if (ret) + return dev_err_probe(dev, ret, "failed to setup mux\n"); + + return 0; +} + +static const struct of_device_id irqmux_of_match[] = { + { .compatible = "renesas,rzn1-gpioirqmux", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, irq_mux_of_match); + +static struct platform_driver irqmux_driver = { + .probe = irqmux_probe, + .driver = { + .name = "rzn1_irqmux", + .of_match_table = irqmux_of_match, + }, +}; +module_platform_driver(irqmux_driver); + +MODULE_AUTHOR("Herve Codina "); +MODULE_DESCRIPTION("Renesas RZ/N1 GPIO IRQ Multiplexer Driver"); +MODULE_LICENSE("GPL"); -- 2.50.1