From patchwork Sun Jul 3 19:40:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 12904455 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6647C433EF for ; Sun, 3 Jul 2022 19:41:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231179AbiGCTlj (ORCPT ); Sun, 3 Jul 2022 15:41:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229549AbiGCTli (ORCPT ); Sun, 3 Jul 2022 15:41:38 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2ACA02DF6; Sun, 3 Jul 2022 12:41:37 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id g16-20020a17090a7d1000b001ea9f820449so11533290pjl.5; Sun, 03 Jul 2022 12:41:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5XuEM/peWM3jBqKuamMU4NqIG4MXBojlkQGoqVrdA0g=; b=pz050vurpfnwHsUrLq49QpQJh/9gfG1u98HtnjQjWpYKSl0cylf+MQ6tBtfup11Mg4 PevsqLBtwPLcAcOtGAV890NEvRj0+dDSXMQhot1uNQ1fRv1eP3kPJBrKKPxGaMY3sBw7 dzrguHipndHwP99hgvmHjxaBURiuFmrH4JCG7eOBixY0oE6TrxSwbQVo5tmGJtqislkn LPLdRf/7JtA56E88+ZgGiIAZUfL7aQ7wHpe4kNh5znAFLxkQNEiOkjdPoXHWL59fbdId 7zCjUCtZwAftG2gU7bRMKoYCrPLO76wQgyZZ4C7Jbn/U+Hwamld/nnZAg87XJFgArLuH XeVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=5XuEM/peWM3jBqKuamMU4NqIG4MXBojlkQGoqVrdA0g=; b=19wN1uzFbcngtUZvKDxwPNvBXbJEbRtQSr3fNvMYV+tN1a1Tong2gWrNYPsYDjzNTs OzJWpmeHA023LOPljDOHCE55y1i6mY2EQpMu4Monr2r0kj1B4umKWjGT3oHtMfoWTOFX hSctahZV++Kxmk/GfpkU5mxkD0M3k9TOTop0TLkeiP5HSqocMLHaTYQBIPmd90bhlN0A U7l4XlSMz7UA5blV6xf8ZbAQnDFBuViCGZ2muNIdOq/8tPjvGNOARY0u2//YtSl222qw tlpSl/s9HfTVxjx6r1SDzAWJphbQn1z8QHSHuQCIfWtf4T/w5WjfUciiBzNJDof3BIeD nsvg== X-Gm-Message-State: AJIora9Rnh+GfO4+rIKsg+GJ26BfSehnMiyyP8nQ+ScSMn43PKDYWW8E oxKufoE1Z4DUvG0JA7UWtMM= X-Google-Smtp-Source: AGRyM1vWmgh5EyQYP8GKMXsRjqRidJNXHkEp8plBfOphntnH5XxbA0CsgqF/vxxPAPRWwiSBUFizrw== X-Received: by 2002:a17:90a:304b:b0:1ec:86b7:2f4f with SMTP id q11-20020a17090a304b00b001ec86b72f4fmr31903680pjl.107.1656877296390; Sun, 03 Jul 2022 12:41:36 -0700 (PDT) Received: from prasmi.domain.name ([103.219.60.86]) by smtp.gmail.com with ESMTPSA id y19-20020a17090aca9300b001e0c5da6a51sm10656104pjt.50.2022.07.03.12.41.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 12:41:35 -0700 (PDT) From: Lad Prabhakar X-Google-Original-From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Geert Uytterhoeven , Linus Walleij , Bartosz Golaszewski , Philipp Zabel , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar , Rob Herring Subject: [PATCH v7 1/5] dt-bindings: interrupt-controller: Add Renesas RZ/G2L Interrupt Controller Date: Sun, 3 Jul 2022 20:40:16 +0100 Message-Id: <20220703194020.78701-2-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add DT bindings for the Renesas RZ/G2L Interrupt Controller. Signed-off-by: Lad Prabhakar Reviewed-by: Rob Herring Reviewed-by: Geert Uytterhoeven --- .../renesas,rzg2l-irqc.yaml | 133 ++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml diff --git a/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml new file mode 100644 index 000000000000..ffbb4ab4d9a7 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml @@ -0,0 +1,133 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/interrupt-controller/renesas,rzg2l-irqc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/G2L (and alike SoC's) Interrupt Controller (IA55) + +maintainers: + - Lad Prabhakar + - Geert Uytterhoeven + +description: | + IA55 performs various interrupt controls including synchronization for the external + interrupts of NMI, IRQ, and GPIOINT and the interrupts of the built-in peripheral + interrupts output by each IP. And it notifies the interrupt to the GIC + - IRQ sense select for 8 external interrupts, mapped to 8 GIC SPI interrupts + - GPIO pins used as external interrupt input pins, mapped to 32 GIC SPI interrupts + - NMI edge select (NMI is not treated as NMI exception and supports fall edge and + stand-up edge detection interrupts) + +allOf: + - $ref: /schemas/interrupt-controller.yaml# + +properties: + compatible: + items: + - enum: + - renesas,r9a07g044-irqc # RZ/G2L + - const: renesas,rzg2l-irqc + + '#interrupt-cells': + description: The first cell should contain external interrupt number (IRQ0-7) and the + second cell is used to specify the flag. + const: 2 + + '#address-cells': + const: 0 + + interrupt-controller: true + + reg: + maxItems: 1 + + interrupts: + maxItems: 41 + + clocks: + maxItems: 2 + + clock-names: + items: + - const: clk + - const: pclk + + power-domains: + maxItems: 1 + + resets: + maxItems: 1 + +required: + - compatible + - '#interrupt-cells' + - '#address-cells' + - interrupt-controller + - reg + - interrupts + - clocks + - clock-names + - power-domains + - resets + +unevaluatedProperties: false + +examples: + - | + #include + #include + + irqc: interrupt-controller@110a0000 { + compatible = "renesas,r9a07g044-irqc", "renesas,rzg2l-irqc"; + reg = <0x110a0000 0x10000>; + #interrupt-cells = <2>; + #address-cells = <0>; + interrupt-controller; + interrupts = , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + ; + clocks = <&cpg CPG_MOD R9A07G044_IA55_CLK>, + <&cpg CPG_MOD R9A07G044_IA55_PCLK>; + clock-names = "clk", "pclk"; + power-domains = <&cpg>; + resets = <&cpg R9A07G044_IA55_RESETN>; + }; From patchwork Sun Jul 3 19:40:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 12904456 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7DD1CCA47F for ; Sun, 3 Jul 2022 19:41:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232713AbiGCTlp (ORCPT ); Sun, 3 Jul 2022 15:41:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232766AbiGCTlo (ORCPT ); Sun, 3 Jul 2022 15:41:44 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70DB060FD; Sun, 3 Jul 2022 12:41:42 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id z1so1056950plb.1; Sun, 03 Jul 2022 12:41:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=CEOh1MxU9c1aKZbSqjLUHoMSMkISw+NEmnMGAQ+BJnY=; b=Q6J6qYhRWfuKFpgyfUjVEO/w6u+CjlAuDi1ga0ZQqMEnL+d4ovwKfrsydTYutMCIv0 /WLO9I0e/76DnTtuhy130Z2OghDLx3ZNmEDE4bI6dibZ0ohlRDQqt5N/E/kU2CgKFqud YMqtJrKB8bnbw9vpsyiMOvg7VP6EK54vbzO67gBlBw0sd8QuK4GDb7mx50i9Oz5o5hhZ syVFC5NJbGH4R9h3UIPw/CtcC+Im1u0HCR91JAlX0xnjZRaf3KDmbsbUOkHMi9sRrUtD hyXCo1xIF75tkbMPzZpNLEkykgizXQFxbUqXF6aup3I9VP/dOlZ8NK0fbbkhEAG0ShkH YESw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=CEOh1MxU9c1aKZbSqjLUHoMSMkISw+NEmnMGAQ+BJnY=; b=xhveqSWYNgENFcLEsDxKyCGXuJtKgGnbxIwckDX4gL0dJOsdoOeMKy6yZygLQuYFsn WMMGhKPj6QW2qVhwnoabYCWCWyQc5yANGppDxqFBldzqRT4BSII/ZfxDcmqL7W9ruCt3 Oe5xxeMzQzA/eGcgjd3XvWtl9WzGXLWxRz+IjW/PJnZdaUEm75efYONGsXReJ+hcc2pp 8DJUCXD5XFeyC34oajcno5ox1DtQztytdPIJQpM+IYzocij5u5uGN80ZbkRDR0PGbEAQ 8Bq/hdodX+KJ+nfYn+BpcwZAfV6tsEvm1ooQhh+WH4UkamqZZPSigXCO7YQAq7Qo+BzQ cYbA== X-Gm-Message-State: AJIora/yWVQj9Zo5ZUWAkSJ/oC3h13XBu3djKkwN//2yEqLYFtlh0AG2 YkyOgi1/KDPtf0CAYkjWlqU= X-Google-Smtp-Source: AGRyM1shQxVzazN5H/wKRucgfhiSGr+4dF5GjkE5TOOqus8acwgmqRU3juo4/6smQDcNH85z0LdCdQ== X-Received: by 2002:a17:902:7104:b0:16b:e1fa:eac7 with SMTP id a4-20020a170902710400b0016be1faeac7mr2092852pll.128.1656877301912; Sun, 03 Jul 2022 12:41:41 -0700 (PDT) Received: from prasmi.domain.name ([103.219.60.86]) by smtp.gmail.com with ESMTPSA id y19-20020a17090aca9300b001e0c5da6a51sm10656104pjt.50.2022.07.03.12.41.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 12:41:41 -0700 (PDT) From: Lad Prabhakar X-Google-Original-From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Geert Uytterhoeven , Linus Walleij , Bartosz Golaszewski , Philipp Zabel , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH v7 2/5] irqchip: Add RZ/G2L IA55 Interrupt Controller driver Date: Sun, 3 Jul 2022 20:40:17 +0100 Message-Id: <20220703194020.78701-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add a driver for the Renesas RZ/G2L Interrupt Controller. This supports external pins being used as interrupts. It supports one line for NMI, 8 external pins and 32 GPIO pins (out of 123) to be used as IRQ lines. Signed-off-by: Lad Prabhakar --- drivers/irqchip/Kconfig | 8 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-renesas-rzg2l.c | 393 ++++++++++++++++++++++++++++ 3 files changed, 402 insertions(+) create mode 100644 drivers/irqchip/irq-renesas-rzg2l.c diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 1f23a6be7d88..b1ab85171a3a 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -242,6 +242,14 @@ 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 RENESAS_RZG2L_IRQC + bool "Renesas RZ/G2L (and alike SoC) IRQC support" if COMPILE_TEST + select GENERIC_IRQ_CHIP + select IRQ_DOMAIN_HIERARCHY + help + Enable support for the Renesas RZ/G2L (and alike SoC) Interrupt Controller + for external devices. + config SL28CPLD_INTC bool "Kontron sl28cpld IRQ controller" depends on MFD_SL28CPLD=y || COMPILE_TEST diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 5b67450a9538..04cb15b647c5 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_RDA_INTC) += irq-rda-intc.o obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o obj-$(CONFIG_RENESAS_RZA1_IRQC) += irq-renesas-rza1.o +obj-$(CONFIG_RENESAS_RZG2L_IRQC) += irq-renesas-rzg2l.o obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq-renesas-rzg2l.c new file mode 100644 index 000000000000..4e977fa04bbe --- /dev/null +++ b/drivers/irqchip/irq-renesas-rzg2l.c @@ -0,0 +1,393 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas RZ/G2L IRQC Driver + * + * Copyright (C) 2022 Renesas Electronics Corporation. + * + * Author: Lad Prabhakar + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IRQC_IRQ_START 1 +#define IRQC_IRQ_COUNT 8 +#define IRQC_TINT_START (IRQC_IRQ_START + IRQC_IRQ_COUNT) +#define IRQC_TINT_COUNT 32 +#define IRQC_NUM_IRQ (IRQC_TINT_START + IRQC_TINT_COUNT) + +#define ISCR 0x10 +#define IITSR 0x14 +#define TSCR 0x20 +#define TITSR0 0x24 +#define TITSR1 0x28 +#define TITSR0_MAX_INT 16 +#define TITSEL_WIDTH 0x2 +#define TSSR(n) (0x30 + ((n) * 4)) +#define TIEN BIT(7) +#define TSSEL_SHIFT(n) (8 * (n)) +#define TSSEL_MASK GENMASK(7, 0) +#define IRQ_MASK 0x3 + +#define TSSR_OFFSET(n) ((n) % 4) +#define TSSR_INDEX(n) ((n) / 4) + +#define TITSR_TITSEL_EDGE_RISING 0 +#define TITSR_TITSEL_EDGE_FALLING 1 +#define TITSR_TITSEL_LEVEL_HIGH 2 +#define TITSR_TITSEL_LEVEL_LOW 3 + +#define IITSR_IITSEL(n, sense) ((sense) << ((n) * 2)) +#define IITSR_IITSEL_LEVEL_LOW 0 +#define IITSR_IITSEL_EDGE_FALLING 1 +#define IITSR_IITSEL_EDGE_RISING 2 +#define IITSR_IITSEL_EDGE_BOTH 3 +#define IITSR_IITSEL_MASK(n) IITSR_IITSEL((n), 3) + +#define TINT_EXTRACT_HWIRQ(x) FIELD_GET(GENMASK(15, 0), (x)) +#define TINT_EXTRACT_GPIOINT(x) FIELD_GET(GENMASK(31, 16), (x)) + +struct rzg2l_irqc_priv { + void __iomem *base; + struct irq_fwspec fwspec[IRQC_NUM_IRQ]; + raw_spinlock_t lock; +}; + +static struct rzg2l_irqc_priv *irq_data_to_priv(struct irq_data *data) +{ + return data->domain->host_data; +} + +static void rzg2l_irq_eoi(struct irq_data *d) +{ + unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START; + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + u32 bit = BIT(hw_irq); + u32 reg; + + reg = readl_relaxed(priv->base + ISCR); + if (reg & bit) + writel_relaxed(reg & ~bit, priv->base + ISCR); +} + +static void rzg2l_tint_eoi(struct irq_data *d) +{ + unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_TINT_START; + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + u32 bit = BIT(hw_irq); + u32 reg; + + reg = readl_relaxed(priv->base + TSCR); + if (reg & bit) + writel_relaxed(reg & ~bit, priv->base + TSCR); +} + +static void rzg2l_irqc_eoi(struct irq_data *d) +{ + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + unsigned int hw_irq = irqd_to_hwirq(d); + + raw_spin_lock(&priv->lock); + if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT) + rzg2l_irq_eoi(d); + else if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) + rzg2l_tint_eoi(d); + raw_spin_unlock(&priv->lock); + irq_chip_eoi_parent(d); +} + +static void rzg2l_irqc_irq_disable(struct irq_data *d) +{ + unsigned int hw_irq = irqd_to_hwirq(d); + + if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) { + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + u32 offset = hw_irq - IRQC_TINT_START; + u32 tssr_offset = TSSR_OFFSET(offset); + u8 tssr_index = TSSR_INDEX(offset); + u32 reg; + + raw_spin_lock(&priv->lock); + reg = readl_relaxed(priv->base + TSSR(tssr_index)); + reg &= ~(TSSEL_MASK << tssr_offset); + writel_relaxed(reg, priv->base + TSSR(tssr_index)); + raw_spin_unlock(&priv->lock); + } + irq_chip_disable_parent(d); +} + +static void rzg2l_irqc_irq_enable(struct irq_data *d) +{ + unsigned int hw_irq = irqd_to_hwirq(d); + + if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) { + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + unsigned long tint = (uintptr_t)d->chip_data; + u32 offset = hw_irq - IRQC_TINT_START; + u32 tssr_offset = TSSR_OFFSET(offset); + u8 tssr_index = TSSR_INDEX(offset); + u32 reg; + + raw_spin_lock(&priv->lock); + reg = readl_relaxed(priv->base + TSSR(tssr_index)); + reg |= (TIEN | tint) << TSSEL_SHIFT(tssr_offset); + writel_relaxed(reg, priv->base + TSSR(tssr_index)); + raw_spin_unlock(&priv->lock); + } + irq_chip_enable_parent(d); +} + +static int rzg2l_irq_set_type(struct irq_data *d, unsigned int type) +{ + unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START; + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + u16 sense, tmp; + + switch (type & IRQ_TYPE_SENSE_MASK) { + case IRQ_TYPE_LEVEL_LOW: + sense = IITSR_IITSEL_LEVEL_LOW; + break; + + case IRQ_TYPE_EDGE_FALLING: + sense = IITSR_IITSEL_EDGE_FALLING; + break; + + case IRQ_TYPE_EDGE_RISING: + sense = IITSR_IITSEL_EDGE_RISING; + break; + + case IRQ_TYPE_EDGE_BOTH: + sense = IITSR_IITSEL_EDGE_BOTH; + break; + + default: + return -EINVAL; + } + + raw_spin_lock(&priv->lock); + tmp = readl_relaxed(priv->base + IITSR); + tmp &= ~IITSR_IITSEL_MASK(hw_irq); + tmp |= IITSR_IITSEL(hw_irq, sense); + writel_relaxed(tmp, priv->base + IITSR); + raw_spin_unlock(&priv->lock); + + return 0; +} + +static int rzg2l_tint_set_edge(struct irq_data *d, unsigned int type) +{ + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + unsigned int hwirq = irqd_to_hwirq(d); + u32 titseln = hwirq - IRQC_TINT_START; + u32 offset; + u8 sense; + u32 reg; + + switch (type & IRQ_TYPE_SENSE_MASK) { + case IRQ_TYPE_EDGE_RISING: + sense = TITSR_TITSEL_EDGE_RISING; + break; + + case IRQ_TYPE_EDGE_FALLING: + sense = TITSR_TITSEL_EDGE_FALLING; + break; + + default: + return -EINVAL; + } + + offset = TITSR0; + if (titseln >= TITSR0_MAX_INT) { + titseln -= TITSR0_MAX_INT; + offset = TITSR1; + } + + raw_spin_lock(&priv->lock); + reg = readl_relaxed(priv->base + offset); + reg &= ~(IRQ_MASK << (titseln * TITSEL_WIDTH)); + reg |= sense << (titseln * TITSEL_WIDTH); + writel_relaxed(reg, priv->base + offset); + raw_spin_unlock(&priv->lock); + + return 0; +} + +static int rzg2l_irqc_set_type(struct irq_data *d, unsigned int type) +{ + unsigned int hw_irq = irqd_to_hwirq(d); + int ret = -EINVAL; + + if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT) + ret = rzg2l_irq_set_type(d, type); + else if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) + ret = rzg2l_tint_set_edge(d, type); + if (ret) + return ret; + + return irq_chip_set_type_parent(d, IRQ_TYPE_LEVEL_HIGH); +} + +static const struct irq_chip irqc_chip = { + .name = "rzg2l-irqc", + .irq_eoi = rzg2l_irqc_eoi, + .irq_mask = irq_chip_mask_parent, + .irq_unmask = irq_chip_unmask_parent, + .irq_disable = rzg2l_irqc_irq_disable, + .irq_enable = rzg2l_irqc_irq_enable, + .irq_get_irqchip_state = irq_chip_get_parent_state, + .irq_set_irqchip_state = irq_chip_set_parent_state, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_set_type = rzg2l_irqc_set_type, + .flags = IRQCHIP_MASK_ON_SUSPEND | + IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_SKIP_SET_WAKE, +}; + +static int rzg2l_irqc_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + struct rzg2l_irqc_priv *priv = domain->host_data; + unsigned long tint = 0; + irq_hw_number_t hwirq; + unsigned int type; + int ret; + + ret = irq_domain_translate_twocell(domain, arg, &hwirq, &type); + if (ret) + return ret; + + /* + * For TINT interrupts ie where pinctrl driver is child of irqc domain + * the hwirq and TINT are encoded in fwspec->param[0]. + * hwirq for TINT range from 9-40, hwirq is embedded 0-15 bits and TINT + * from 16-31 bits. TINT from the pinctrl driver needs to be programmed + * in IRQC registers to enable a given gpio pin as interrupt. + */ + if (hwirq > IRQC_IRQ_COUNT) { + tint = TINT_EXTRACT_GPIOINT(hwirq); + hwirq = TINT_EXTRACT_HWIRQ(hwirq); + + if (hwirq < IRQC_TINT_START) + return -EINVAL; + } + + if (hwirq > (IRQC_NUM_IRQ - 1)) + return -EINVAL; + + ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &irqc_chip, + (void *)(uintptr_t)tint); + if (ret) + return ret; + + return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &priv->fwspec[hwirq]); +} + +static const struct irq_domain_ops rzg2l_irqc_domain_ops = { + .alloc = rzg2l_irqc_alloc, + .free = irq_domain_free_irqs_common, + .translate = irq_domain_translate_twocell, +}; + +static int rzg2l_irqc_parse_interrupts(struct rzg2l_irqc_priv *priv, + struct device_node *np) +{ + struct of_phandle_args map; + unsigned int i; + int ret; + + for (i = 0; i < IRQC_NUM_IRQ; i++) { + ret = of_irq_parse_one(np, i, &map); + if (ret) + return ret; + of_phandle_args_to_fwspec(np, map.args, map.args_count, + &priv->fwspec[i]); + } + + return 0; +} + +static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent) +{ + struct irq_domain *irq_domain, *parent_domain; + struct platform_device *pdev; + struct reset_control *resetn; + struct rzg2l_irqc_priv *priv; + int ret; + + pdev = of_find_device_by_node(node); + if (!pdev) + return -ENODEV; + + parent_domain = irq_find_host(parent); + if (!parent_domain) { + dev_err(&pdev->dev, "cannot find parent domain\n"); + return -ENODEV; + } + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + ret = rzg2l_irqc_parse_interrupts(priv, node); + if (ret) { + dev_err(&pdev->dev, "cannot parse interrupts: %d\n", ret); + return ret; + } + + resetn = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(resetn)) + return IS_ERR(resetn); + + ret = reset_control_deassert(resetn); + if (ret) { + dev_err(&pdev->dev, "failed to deassert resetn pin, %d\n", ret); + return ret; + } + + pm_runtime_enable(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "pm_runtime_resume_and_get failed: %d\n", ret); + goto pm_disable; + } + + raw_spin_lock_init(&priv->lock); + + irq_domain = irq_domain_add_hierarchy(parent_domain, 0, IRQC_NUM_IRQ, + node, &rzg2l_irqc_domain_ops, + priv); + if (!irq_domain) { + dev_err(&pdev->dev, "failed to add irq domain\n"); + ret = -ENOMEM; + goto pm_put; + } + + return 0; + +pm_put: + pm_runtime_put(&pdev->dev); +pm_disable: + pm_runtime_disable(&pdev->dev); + reset_control_assert(resetn); + return ret; +} + +IRQCHIP_PLATFORM_DRIVER_BEGIN(rzg2l_irqc) +IRQCHIP_MATCH("renesas,rzg2l-irqc", rzg2l_irqc_init) +IRQCHIP_PLATFORM_DRIVER_END(rzg2l_irqc) +MODULE_AUTHOR("Lad Prabhakar "); +MODULE_DESCRIPTION("Renesas RZ/G2L IRQC Driver"); +MODULE_LICENSE("GPL"); From patchwork Sun Jul 3 19:40:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 12904457 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8171BC43334 for ; Sun, 3 Jul 2022 19:41:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232847AbiGCTlx (ORCPT ); Sun, 3 Jul 2022 15:41:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52678 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232809AbiGCTlt (ORCPT ); Sun, 3 Jul 2022 15:41:49 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D3BF6157; Sun, 3 Jul 2022 12:41:47 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id z1so1057044plb.1; Sun, 03 Jul 2022 12:41:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=XI0bxFBrEKRBuDqtanZl8S03OsomJgySRxxoYC8Ucrc=; b=BMRuLECs2RX8B6S5+IZV8fP93sQaUeK4uPrhUKicuUsLE9HU0FKZbfklpf6VirX9lg 9DCIhzlSiWlXIR09aOkB1etop/nGQ2JVntWXMNI6BYXbDZ9HxM4BTi6NqLFEqYAPCqxc evfCU8JZ4TeOuxzq1Z8Z3SK7FDZ7C4LW3FPjfkTGGG2FXFfkgnj3jWLQ46QgxSdYFnr8 56zMstllAfIfejEk13ksSdnSKnnNCtlgQ+3sVsrRCtoQunL1VR3PAUGJH7oBTWYlod3l CoGaIWQYtZasb9muld9wqIkOQvxQGl7pbEng/KsLHt6eVjmrmYTTgw5+boH+lgqR/IQo O5kQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=XI0bxFBrEKRBuDqtanZl8S03OsomJgySRxxoYC8Ucrc=; b=CgPR+DwRAussj78jccWiQo8LClR04YQ5dwGcxAZdJlx3wWE3iKw0cQupaobeMdjKur 0XJABIlvylFG1ArpXItZwnBJGoj0r7bq9F29blsX/TDF6s4MY08L/0cbSrBAF4gMnOLr j5pmpCe8xH2t4sVF5CnkxqNVoc2bhSC3X2ToBH/dDCJLcXXg/f2sb/+95TgxUa16akmT lgGlibMnoY5gLrhBwAZs3Y/3iXgXtV1TEghaJfNgsTENufk0wn2YteuB4ouiOxjYGFC9 zWN3OmYS8C9j0qlE6VFMnU4U8ffct7lr266nCiJB386gtP2w2JLFsVK5SewqI1Z6jhyT DPSg== X-Gm-Message-State: AJIora+0TjeAkyXfWPLVUuIbSGUEEMahhFgBcbM4Fe8PczoR8aB3Fa+N ndIIYjuedEAtLMwPb/W1yOs= X-Google-Smtp-Source: AGRyM1tcLiw1b5SdWvCYRgaGNtv6D8+BAF8MpHbHdXcwoN9JYPJuqM+yVkIbHGghRgjIqW9rBqW3XA== X-Received: by 2002:a17:90a:9401:b0:1ee:e31f:7523 with SMTP id r1-20020a17090a940100b001eee31f7523mr29827184pjo.175.1656877307226; Sun, 03 Jul 2022 12:41:47 -0700 (PDT) Received: from prasmi.domain.name ([103.219.60.86]) by smtp.gmail.com with ESMTPSA id y19-20020a17090aca9300b001e0c5da6a51sm10656104pjt.50.2022.07.03.12.41.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 12:41:46 -0700 (PDT) From: Lad Prabhakar X-Google-Original-From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Geert Uytterhoeven , Linus Walleij , Bartosz Golaszewski , Philipp Zabel , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH v7 3/5] gpio: gpiolib: Allow free() callback to be overridden Date: Sun, 3 Jul 2022 20:40:18 +0100 Message-Id: <20220703194020.78701-4-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Allow free() callback to be overridden from irq_domain_ops for hierarchical chips. This allows drivers to free up resources which are allocated during child_to_parent_hwirq()/populate_parent_alloc_arg() callbacks. On Renesas RZ/G2L platform a bitmap is maintained for TINT slots, a slot is allocated in child_to_parent_hwirq() callback which is freed up in free callback hence this override. Signed-off-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven --- drivers/gpio/gpiolib.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index bfde94243752..68d9f95d7799 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1181,15 +1181,18 @@ static void gpiochip_hierarchy_setup_domain_ops(struct irq_domain_ops *ops) ops->activate = gpiochip_irq_domain_activate; ops->deactivate = gpiochip_irq_domain_deactivate; ops->alloc = gpiochip_hierarchy_irq_domain_alloc; - ops->free = irq_domain_free_irqs_common; /* - * We only allow overriding the translate() function for + * We only allow overriding the translate() and free() functions for * hierarchical chips, and this should only be done if the user - * really need something other than 1:1 translation. + * really need something other than 1:1 translation for translate() + * callback and free if user wants to free up any resources which + * were allocated during callbacks, for example populate_parent_alloc_arg. */ if (!ops->translate) ops->translate = gpiochip_hierarchy_irq_domain_translate; + if (!ops->free) + ops->free = irq_domain_free_irqs_common; } static int gpiochip_hierarchy_add_domain(struct gpio_chip *gc) From patchwork Sun Jul 3 19:40:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 12904458 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6CB2EC43334 for ; Sun, 3 Jul 2022 19:41:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232803AbiGCTl5 (ORCPT ); Sun, 3 Jul 2022 15:41:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232869AbiGCTlz (ORCPT ); Sun, 3 Jul 2022 15:41:55 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C149624C; Sun, 3 Jul 2022 12:41:53 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id y14-20020a17090a644e00b001ef775f7118so3168766pjm.2; Sun, 03 Jul 2022 12:41:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZusAfOqShMCPeI4fl6PdXXLSrPbbUhiptFDPPX9DwwU=; b=old0sniP2RKpqGWQhym3YJMH/Kdwoipcp3daTc6keF+8niCm/8DV75hn7xyeyDb2kw FGqXhjKIt8fJcUxdR2/ghUMiFMmuMV2vEpRW4RhnIX5cqbaUc/CtTrzcVnGUu3dcFXlE 4wiQzaJQ236GkmmeDSydYAZ+ZYoChlNNJts27XKLAoMMfdQ6rt9CARav+vGJfsc55eiq 1caFhMMMOvtJOEkpk5EsJVYVIOLlGp1RHWu5xvWNzHqaXSbTMRAhJqbA0h/YaFc3zCFx Y/sN+gXKomJzCigu8jg1uKnOySEgEateP2kyeDq8YlPxC/VVUbmh7L5LPU9kOFWFGFLX cthw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZusAfOqShMCPeI4fl6PdXXLSrPbbUhiptFDPPX9DwwU=; b=jjLCgJhXctnG9RBt0jMg9S/ix6djhBsKxH7imoYDO3VHEJmy0qK0ubMYSUBJLqei6+ Ws+xAlOgijl3CWkjFcDWLv0qTPr8RC78EaR/BCJZ4po0+LnsgUS3LfykBHMhIVJcwWXP UEXZk8Df7kVcN0EntEA/0EXF2YKw0Ngq++I+r1/1RcIJx+1WorAhQ1oouA2dXdx8bsPv WbAfLgxffQgxp88Uu4CIy9YQ75VhVyeY6VnFpLmfM9oYUR2wJUdntK+VimeQH6ZIzENQ 1WGl3gUCCeKBPEFaWHTxZJKuH+8v6tP/9XYvpQgPQ1ZhZB+X12e/QXYU1rLYKndi9f6f fTHg== X-Gm-Message-State: AJIora9DtzSezMaA4zELIYrVNLPrBY0O/oFpC6GEzjhBJN09hyMciXiC O5fgG4BCRDTckwPA/8Dq2Dtl5hOB+f8= X-Google-Smtp-Source: AGRyM1tTdh3JSwBX1i4xFXSzUcD5IW6XObjfRYamNyUoDsAqIsezV2BCORGbK19Yj9X/pd553WAwmg== X-Received: by 2002:a17:902:aa8a:b0:16a:1ea5:d417 with SMTP id d10-20020a170902aa8a00b0016a1ea5d417mr33238807plr.4.1656877312738; Sun, 03 Jul 2022 12:41:52 -0700 (PDT) Received: from prasmi.domain.name ([103.219.60.86]) by smtp.gmail.com with ESMTPSA id y19-20020a17090aca9300b001e0c5da6a51sm10656104pjt.50.2022.07.03.12.41.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 12:41:52 -0700 (PDT) From: Lad Prabhakar X-Google-Original-From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Geert Uytterhoeven , Linus Walleij , Bartosz Golaszewski , Philipp Zabel , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar , Rob Herring Subject: [PATCH v7 4/5] dt-bindings: pinctrl: renesas,rzg2l-pinctrl: Document the properties to handle GPIO IRQ Date: Sun, 3 Jul 2022 20:40:19 +0100 Message-Id: <20220703194020.78701-5-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Document the required properties to handle GPIO IRQ. Signed-off-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven Reviewed-by: Rob Herring --- .../bindings/pinctrl/renesas,rzg2l-pinctrl.yaml | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml index 52df1b146174..997b74639112 100644 --- a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml +++ b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml @@ -47,6 +47,17 @@ properties: gpio-ranges: maxItems: 1 + interrupt-controller: true + + '#interrupt-cells': + const: 2 + description: + The first cell contains the global GPIO port index, constructed using the + RZG2L_GPIO() helper macro in and the + second cell is used to specify the flag. + E.g. "interrupts = ;" if P43_0 is + being used as an interrupt. + clocks: maxItems: 1 @@ -110,6 +121,8 @@ required: - gpio-controller - '#gpio-cells' - gpio-ranges + - interrupt-controller + - '#interrupt-cells' - clocks - power-domains - resets @@ -126,6 +139,8 @@ examples: gpio-controller; #gpio-cells = <2>; gpio-ranges = <&pinctrl 0 0 392>; + interrupt-controller; + #interrupt-cells = <2>; clocks = <&cpg CPG_MOD R9A07G044_GPIO_HCLK>; resets = <&cpg R9A07G044_GPIO_RSTN>, <&cpg R9A07G044_GPIO_PORT_RESETN>, From patchwork Sun Jul 3 19:40:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 12904459 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59133C43334 for ; Sun, 3 Jul 2022 19:42:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232973AbiGCTmJ (ORCPT ); Sun, 3 Jul 2022 15:42:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232823AbiGCTmE (ORCPT ); Sun, 3 Jul 2022 15:42:04 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF91C62CA; Sun, 3 Jul 2022 12:41:58 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id r22so222383pgr.2; Sun, 03 Jul 2022 12:41:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7etB9DDCy5eqA6qYraUm4MlNCx1GfS+ch6OV0SqfpSg=; b=Irgb4kSNkqtNQTsRQCWztqM91xfcPrMZIsR5FR1xGmZMm8llbEFidPWE7fUQFfJJXV 9Zgm4SCmFmcA6/B9PGRXTTHBOYGc39E55LDDWq3t3xZ3j/pZxXwnUnisHpHWLY19sIjl NIsmyDI/NoPL4jrcx8fHhqzUEyUL/GJ1UU1zi0UiheXVrTKMQ2xLbD/w36nBo3X9fkMu q3qnyTIZtVF7VD2Q1q+JARPTzlHB/ScrE1jMcpvJJ0uv6NATS49vqnMEr3QkHN+DeCjF gStkgE9MB8+grHH+DLZDMUsGnOchIQ6a2UmLn0uflvBSibpgZSXWCZ6wEs//+UOpf9YR dkLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7etB9DDCy5eqA6qYraUm4MlNCx1GfS+ch6OV0SqfpSg=; b=WKNuGu2g3TYZVROlQhJoCU/o2dT+KtlNAJ31dQ0unD/RFHy4U1HZQmfkNnsT2Vmo3J QZhqVGlo22kgOuNd9rfbExbwy6wjZ0UeOCV+FLTv0xxeMcRn5yagtLzqe38zVz2qx6ui V6HxGW+SiAThb4Kei0wUjkf3otmnCcet//xTslL/aSzG/Xgew4hAKm+vBpEPDV2LLlYA wGjgsEwSWwNk9SKssFzpLQSgfVbS4JyE73kbWElOzabI8qUChcBQUIRoB79djLchBEhQ mb/c7yO4bsrxSvHd/z+N2OAJq82QKtU18NbhHFVopzoOl99Ln08VMDnmxIyPY+rSFzKx QF+w== X-Gm-Message-State: AJIora/ciPG4zpHRUiPTXZfZr+zw5zfy2fdymAIIacGgLfZI+8y9Ey5V cKFbWd5uLvqXUqfrT5D8c1M= X-Google-Smtp-Source: AGRyM1s7ocHuJp0dmHyHq2ijhwKocSYM8rsnEGEdj+lLxjjd2W+1v+Ee6ss1QTC/qgrMBQm5Z/MH8g== X-Received: by 2002:a65:6b8a:0:b0:3db:7dc5:fec2 with SMTP id d10-20020a656b8a000000b003db7dc5fec2mr21744593pgw.223.1656877318147; Sun, 03 Jul 2022 12:41:58 -0700 (PDT) Received: from prasmi.domain.name ([103.219.60.86]) by smtp.gmail.com with ESMTPSA id y19-20020a17090aca9300b001e0c5da6a51sm10656104pjt.50.2022.07.03.12.41.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 12:41:57 -0700 (PDT) From: Lad Prabhakar X-Google-Original-From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Geert Uytterhoeven , Linus Walleij , Bartosz Golaszewski , Philipp Zabel , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH v7 5/5] pinctrl: renesas: pinctrl-rzg2l: Add IRQ domain to handle GPIO interrupt Date: Sun, 3 Jul 2022 20:40:20 +0100 Message-Id: <20220703194020.78701-6-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220703194020.78701-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add IRQ domain to RZ/G2L pinctrl driver to handle GPIO interrupt. GPIO0-GPIO122 pins can be used as IRQ lines but only 32 pins can be used as IRQ lines at a given time. Selection of pins as IRQ lines is handled by IA55 (which is the IRQC block) which sits in between the GPIO and GIC. Signed-off-by: Lad Prabhakar Reviewed-by: Linus Walleij --- drivers/pinctrl/renesas/pinctrl-rzg2l.c | 233 ++++++++++++++++++++++++ 1 file changed, 233 insertions(+) diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c index a48cac55152c..c47eed9d948f 100644 --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c @@ -9,8 +9,10 @@ #include #include #include +#include #include #include +#include #include #include #include @@ -89,6 +91,7 @@ #define PIN(n) (0x0800 + 0x10 + (n)) #define IOLH(n) (0x1000 + (n) * 8) #define IEN(n) (0x1800 + (n) * 8) +#define ISEL(n) (0x2c80 + (n) * 8) #define PWPR (0x3014) #define SD_CH(n) (0x3000 + (n) * 4) #define QSPI (0x3008) @@ -112,6 +115,10 @@ #define RZG2L_PIN_ID_TO_PORT_OFFSET(id) (RZG2L_PIN_ID_TO_PORT(id) + 0x10) #define RZG2L_PIN_ID_TO_PIN(id) ((id) % RZG2L_PINS_PER_PORT) +#define RZG2L_TINT_MAX_INTERRUPT 32 +#define RZG2L_TINT_IRQ_START_INDEX 9 +#define RZG2L_PACK_HWIRQ(t, i) (((t) << 16) | (i)) + struct rzg2l_dedicated_configs { const char *name; u32 config; @@ -137,6 +144,9 @@ struct rzg2l_pinctrl { struct gpio_chip gpio_chip; struct pinctrl_gpio_range gpio_range; + DECLARE_BITMAP(tint_slot, RZG2L_TINT_MAX_INTERRUPT); + spinlock_t bitmap_lock; + unsigned int hwirq[RZG2L_TINT_MAX_INTERRUPT]; spinlock_t lock; }; @@ -883,8 +893,14 @@ static int rzg2l_gpio_get(struct gpio_chip *chip, unsigned int offset) static void rzg2l_gpio_free(struct gpio_chip *chip, unsigned int offset) { + unsigned int virq; + pinctrl_gpio_free(chip->base + offset); + virq = irq_find_mapping(chip->irq.domain, offset); + if (virq) + irq_dispose_mapping(virq); + /* * Set the GPIO as an input to ensure that the next GPIO request won't * drive the GPIO pin as an output. @@ -1104,14 +1120,221 @@ static struct { } }; +static int rzg2l_gpio_get_gpioint(unsigned int virq) +{ + unsigned int gpioint; + unsigned int i; + u32 port, bit; + + port = virq / 8; + bit = virq % 8; + + if (port >= ARRAY_SIZE(rzg2l_gpio_configs) || + bit >= RZG2L_GPIO_PORT_GET_PINCNT(rzg2l_gpio_configs[port])) + return -EINVAL; + + gpioint = bit; + for (i = 0; i < port; i++) + gpioint += RZG2L_GPIO_PORT_GET_PINCNT(rzg2l_gpio_configs[i]); + + return gpioint; +} + +static void rzg2l_gpio_irq_disable(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct rzg2l_pinctrl *pctrl = container_of(gc, struct rzg2l_pinctrl, gpio_chip); + unsigned int hwirq = irqd_to_hwirq(d); + unsigned long flags; + void __iomem *addr; + u32 port; + u8 bit; + + port = RZG2L_PIN_ID_TO_PORT(hwirq); + bit = RZG2L_PIN_ID_TO_PIN(hwirq); + + addr = pctrl->base + ISEL(port); + if (bit >= 4) { + bit -= 4; + addr += 4; + } + + spin_lock_irqsave(&pctrl->lock, flags); + writel(readl(addr) & ~BIT(bit * 8), addr); + spin_unlock_irqrestore(&pctrl->lock, flags); + + gpiochip_disable_irq(gc, hwirq); + irq_chip_disable_parent(d); +} + +static void rzg2l_gpio_irq_enable(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct rzg2l_pinctrl *pctrl = container_of(gc, struct rzg2l_pinctrl, gpio_chip); + unsigned int hwirq = irqd_to_hwirq(d); + unsigned long flags; + void __iomem *addr; + u32 port; + u8 bit; + + gpiochip_enable_irq(gc, hwirq); + + port = RZG2L_PIN_ID_TO_PORT(hwirq); + bit = RZG2L_PIN_ID_TO_PIN(hwirq); + + addr = pctrl->base + ISEL(port); + if (bit >= 4) { + bit -= 4; + addr += 4; + } + + spin_lock_irqsave(&pctrl->lock, flags); + writel(readl(addr) | BIT(bit * 8), addr); + spin_unlock_irqrestore(&pctrl->lock, flags); + + irq_chip_enable_parent(d); +} + +static int rzg2l_gpio_irq_set_type(struct irq_data *d, unsigned int type) +{ + return irq_chip_set_type_parent(d, type); +} + +static void rzg2l_gpio_irqc_eoi(struct irq_data *d) +{ + irq_chip_eoi_parent(d); +} + +static void rzg2l_gpio_irq_print_chip(struct irq_data *data, struct seq_file *p) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + + seq_printf(p, dev_name(gc->parent)); +} + +static const struct irq_chip rzg2l_gpio_irqchip = { + .name = "rzg2l-gpio", + .irq_disable = rzg2l_gpio_irq_disable, + .irq_enable = rzg2l_gpio_irq_enable, + .irq_mask = irq_chip_mask_parent, + .irq_unmask = irq_chip_unmask_parent, + .irq_set_type = rzg2l_gpio_irq_set_type, + .irq_eoi = rzg2l_gpio_irqc_eoi, + .irq_print_chip = rzg2l_gpio_irq_print_chip, + .flags = IRQCHIP_IMMUTABLE, + GPIOCHIP_IRQ_RESOURCE_HELPERS, +}; + +static int rzg2l_gpio_child_to_parent_hwirq(struct gpio_chip *gc, + unsigned int child, + unsigned int child_type, + unsigned int *parent, + unsigned int *parent_type) +{ + struct rzg2l_pinctrl *pctrl = gpiochip_get_data(gc); + unsigned long flags; + int gpioint, irq; + + gpioint = rzg2l_gpio_get_gpioint(child); + if (gpioint < 0) + return gpioint; + + spin_lock_irqsave(&pctrl->bitmap_lock, flags); + irq = bitmap_find_free_region(pctrl->tint_slot, RZG2L_TINT_MAX_INTERRUPT, get_order(1)); + spin_unlock_irqrestore(&pctrl->bitmap_lock, flags); + if (irq < 0) + return -ENOSPC; + pctrl->hwirq[irq] = child; + irq += RZG2L_TINT_IRQ_START_INDEX; + + /* All these interrupts are level high in the CPU */ + *parent_type = IRQ_TYPE_LEVEL_HIGH; + *parent = RZG2L_PACK_HWIRQ(gpioint, irq); + return 0; +} + +static int rzg2l_gpio_populate_parent_fwspec(struct gpio_chip *chip, + union gpio_irq_fwspec *gfwspec, + unsigned int parent_hwirq, + unsigned int parent_type) +{ + struct irq_fwspec *fwspec = &gfwspec->fwspec; + + fwspec->fwnode = chip->irq.parent_domain->fwnode; + fwspec->param_count = 2; + fwspec->param[0] = parent_hwirq; + fwspec->param[1] = parent_type; + + return 0; +} + +static void rzg2l_gpio_irq_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + struct irq_data *d; + + d = irq_domain_get_irq_data(domain, virq); + if (d) { + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct rzg2l_pinctrl *pctrl = container_of(gc, struct rzg2l_pinctrl, gpio_chip); + irq_hw_number_t hwirq = irqd_to_hwirq(d); + unsigned long flags; + unsigned int i; + + for (i = 0; i < RZG2L_TINT_MAX_INTERRUPT; i++) { + if (pctrl->hwirq[i] == hwirq) { + spin_lock_irqsave(&pctrl->bitmap_lock, flags); + bitmap_release_region(pctrl->tint_slot, i, get_order(1)); + spin_unlock_irqrestore(&pctrl->bitmap_lock, flags); + pctrl->hwirq[i] = 0; + break; + } + } + } + irq_domain_free_irqs_common(domain, virq, nr_irqs); +} + +static void rzg2l_init_irq_valid_mask(struct gpio_chip *gc, + unsigned long *valid_mask, + unsigned int ngpios) +{ + struct rzg2l_pinctrl *pctrl = gpiochip_get_data(gc); + struct gpio_chip *chip = &pctrl->gpio_chip; + unsigned int offset; + + /* Forbid unused lines to be mapped as IRQs */ + for (offset = 0; offset < chip->ngpio; offset++) { + u32 port, bit; + + port = offset / 8; + bit = offset % 8; + + if (port >= ARRAY_SIZE(rzg2l_gpio_configs) || + bit >= RZG2L_GPIO_PORT_GET_PINCNT(rzg2l_gpio_configs[port])) + clear_bit(offset, valid_mask); + } +} + static int rzg2l_gpio_register(struct rzg2l_pinctrl *pctrl) { struct device_node *np = pctrl->dev->of_node; struct gpio_chip *chip = &pctrl->gpio_chip; const char *name = dev_name(pctrl->dev); + struct irq_domain *parent_domain; struct of_phandle_args of_args; + struct device_node *parent_np; + struct gpio_irq_chip *girq; int ret; + parent_np = of_irq_find_parent(np); + if (!parent_np) + return -ENXIO; + + parent_domain = irq_find_host(parent_np); + of_node_put(parent_np); + if (!parent_domain) + return -EPROBE_DEFER; + ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &of_args); if (ret) { dev_err(pctrl->dev, "Unable to parse gpio-ranges\n"); @@ -1138,6 +1361,15 @@ static int rzg2l_gpio_register(struct rzg2l_pinctrl *pctrl) chip->base = -1; chip->ngpio = of_args.args[2]; + girq = &chip->irq; + gpio_irq_chip_set_chip(girq, &rzg2l_gpio_irqchip); + girq->fwnode = of_node_to_fwnode(np); + girq->parent_domain = parent_domain; + girq->child_to_parent_hwirq = rzg2l_gpio_child_to_parent_hwirq; + girq->populate_parent_alloc_arg = rzg2l_gpio_populate_parent_fwspec; + girq->child_irq_domain_ops.free = rzg2l_gpio_irq_domain_free; + girq->init_valid_mask = rzg2l_init_irq_valid_mask; + pctrl->gpio_range.id = 0; pctrl->gpio_range.pin_base = 0; pctrl->gpio_range.base = 0; @@ -1253,6 +1485,7 @@ static int rzg2l_pinctrl_probe(struct platform_device *pdev) } spin_lock_init(&pctrl->lock); + spin_lock_init(&pctrl->bitmap_lock); platform_set_drvdata(pdev, pctrl);