From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (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 898872E8E0F; Mon, 20 Oct 2025 08:08:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760947687; cv=none; b=UDVjvz1gwNVmN1K2SUbBb5Dssjo6dtLTgJDxEdJqCbEKA3KHbt0HnBopM6XigHXJFd9t6rTsxmuc0E1z1O119fEO8MEpa5I+bOoKZOrLKY8RcoQ7a8dE7slur+Uz9gyepQ/71z6Uzom3AsehTOjtb+2NL3sOvOcDKHwbItTeHYs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760947687; c=relaxed/simple; bh=YJwqjaGZAUPD4tO/1iwXfZSi8CYOngLDs6UTKh3mLlo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KBRnHiu0xHFWGm4yAHgXDgRe/3mgaNGLN7x2vBp5VSPxr1+ebCH0Ne2A98EQ7wodFQ8ME5aAVKsqPtzvSfcsM35lk+b+fOOi29sYia/755x7BiMYl8WXxxrY3upr9P3ReYAf1GGr7/D3UgcmqSkwvl+qO9aOlQFHlBi2w+Hn8WE= 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=QGBAMZVn; arc=none smtp.client-ip=185.246.85.4 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="QGBAMZVn" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id A184F4E411EE; Mon, 20 Oct 2025 08:08:03 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 75616606D5; Mon, 20 Oct 2025 08:08:03 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 87138102F239C; Mon, 20 Oct 2025 10:07:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1760947678; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=TMLJFW6Npf8hLh9XfvbRPURc/xJl+PVIV7H35JXGX2k=; b=QGBAMZVnbC9QxkyKm9RXRu0hv1DPjc+WDtYXOxDoV3NmINrTfHI3cKpR5penvJOLKr7M3S i8l0bNaSplPvUTs3sgLqolPZ0Vt0oJkUsDoqQImnIxMxbeulcVTIKZvA0evKSirwV6VQx3 rsoUEmAG/+G4adg0BSS2rixPbpvmWwAoqbUeAiFrE9I+wA+FHtl9cg/eIxenbPdqWSVt52 EDrDdmu/8KXgB/02JERLUUfv5oYkf/ktOwVZbyd5x1XljYZzqTCZJZpnZAC6fdx7CL4KkO 73JwVVELsQRWkv58pLRkdVdxkQWAH5IvLm1HjWRHTAfF8wMaBVjO0AvJJhXFng== 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 v5 7/8] soc: renesas: Add support for Renesas RZ/N1 GPIO Interrupt Multiplexer Date: Mon, 20 Oct 2025 10:06:43 +0200 Message-ID: <20251020080648.13452-8-herve.codina@bootlin.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251020080648.13452-1-herve.codina@bootlin.com> References: <20251020080648.13452-1-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 | 150 ++++++++++++++++++++++++++++++ 3 files changed, 155 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..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..42dc4174a34e --- /dev/null +++ b/drivers/soc/renesas/rzn1_irqmux.c @@ -0,0 +1,150 @@ +// 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 + +/* + * The array index is the output line index, the value at the index is the + * GIC SPI interrupt number the output line is connected to. + */ +static const u32 rzn1_irqmux_output_lines[] = { + 103, 104, 105, 106, 107, 108, 109, 110 +}; + +static int rzn1_irqmux_parent_args_to_line_index(struct device *dev, + const struct of_phandle_args *parent_args, + const u32 output_lines[], + unsigned int output_lines_count) +{ + unsigned int i; + + /* + * 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 and rzn1_irqmux_output_line[] mapping array. + */ + + if (parent_args->args_count != 3 || + parent_args->args[0] != GIC_SPI) { + dev_err(dev, "Invalid interrupt-map item\n"); + return -EINVAL; + } + + for (i = 0; i < output_lines_count; i++) { + if (parent_args->args[1] == output_lines[i]) + return i; + } + + dev_err(dev, "Invalid GIC interrupt %u\n", parent_args->args[1]); + return -EINVAL; +} + +static int rzn1_irqmux_setup(struct device *dev, struct device_node *np, u32 __iomem *regs) +{ + struct of_imap_parser imap_parser; + struct of_imap_item imap_item; + unsigned long index_done = 0; + 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; + + /* 8 output lines are available */ + BUILD_BUG_ON(ARRAY_SIZE(rzn1_irqmux_output_lines) != 8); + + /* + * index_done is an unsigned long integer. Be sure that no buffer + * overflow can occur. + */ + BUILD_BUG_ON(ARRAY_SIZE(rzn1_irqmux_output_lines) > BITS_PER_LONG); + + for_each_of_imap_item(&imap_parser, &imap_item) { + index = rzn1_irqmux_parent_args_to_line_index(dev, + &imap_item.parent_args, + rzn1_irqmux_output_lines, + ARRAY_SIZE(rzn1_irqmux_output_lines)); + 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