From patchwork Wed Nov 10 22:58:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 517194 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6C7CC433FE for ; Wed, 10 Nov 2021 22:58:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B4D9161284 for ; Wed, 10 Nov 2021 22:58:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233982AbhKJXBK (ORCPT ); Wed, 10 Nov 2021 18:01:10 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:15510 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S233848AbhKJXBK (ORCPT ); Wed, 10 Nov 2021 18:01:10 -0500 X-IronPort-AV: E=Sophos;i="5.87,225,1631545200"; d="scan'208";a="100143741" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 11 Nov 2021 07:58:21 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 650834006CC7; Thu, 11 Nov 2021 07:58:18 +0900 (JST) From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Linus Walleij , Geert Uytterhoeven , Magnus Damm , Bartosz Golaszewski , Philipp Zabel Cc: devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v3 1/7] dt-bindings: interrupt-controller: Add Renesas RZ/G2L Interrupt Controller Date: Wed, 10 Nov 2021 22:58:02 +0000 Message-Id: <20211110225808.16388-2-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add DT bindings for the Renesas RZ/G2L Interrupt Controller. Signed-off-by: Lad Prabhakar --- .../renesas,rzg2l-irqc.yaml | 137 ++++++++++++++++++ 1 file changed, 137 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..ebe318fe336b --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml @@ -0,0 +1,137 @@ +# 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 Interrupt Controller + +maintainers: + - Lad Prabhakar + - Geert Uytterhoeven + +description: | + The RZ/G2L Interrupt Controller is a front-end for the GIC found on Renesas RZ/G2L SoC's + - 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': + const: 2 + + '#address-cells': + const: 0 + + interrupt-controller: true + + reg: + maxItems: 1 + + interrupt-map: + maxItems: 41 + description: Specifies the mapping from external interrupts to GIC interrupts. + + interrupt-map-mask: + items: + - const: 40 + - const: 0 + + 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 + - interrupt-map + - interrupt-map-mask + - clocks + - clock-names + - power-domains + - resets + +additionalProperties: false + +examples: + - | + #include + #include + + irqc: interrupt-controller@110a0000 { + compatible = "renesas,r9a07g044-irqc", "renesas,rzg2l-irqc"; + #interrupt-cells = <2>; + #address-cells = <0>; + interrupt-controller; + reg = <0x110a0000 0x10000>; + interrupt-map = <0 0 &gic GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>, + <1 0 &gic GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>, + <2 0 &gic GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>, + <3 0 &gic GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>, + <4 0 &gic GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>, + <5 0 &gic GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>, + <6 0 &gic GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>, + <7 0 &gic GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>, + <8 0 &gic GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>, + <9 0 &gic GIC_SPI 444 IRQ_TYPE_LEVEL_HIGH>, + <10 0 &gic GIC_SPI 445 IRQ_TYPE_LEVEL_HIGH>, + <11 0 &gic GIC_SPI 446 IRQ_TYPE_LEVEL_HIGH>, + <12 0 &gic GIC_SPI 447 IRQ_TYPE_LEVEL_HIGH>, + <13 0 &gic GIC_SPI 448 IRQ_TYPE_LEVEL_HIGH>, + <14 0 &gic GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>, + <15 0 &gic GIC_SPI 450 IRQ_TYPE_LEVEL_HIGH>, + <16 0 &gic GIC_SPI 451 IRQ_TYPE_LEVEL_HIGH>, + <17 0 &gic GIC_SPI 452 IRQ_TYPE_LEVEL_HIGH>, + <18 0 &gic GIC_SPI 453 IRQ_TYPE_LEVEL_HIGH>, + <19 0 &gic GIC_SPI 454 IRQ_TYPE_LEVEL_HIGH>, + <20 0 &gic GIC_SPI 455 IRQ_TYPE_LEVEL_HIGH>, + <21 0 &gic GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>, + <22 0 &gic GIC_SPI 457 IRQ_TYPE_LEVEL_HIGH>, + <23 0 &gic GIC_SPI 458 IRQ_TYPE_LEVEL_HIGH>, + <24 0 &gic GIC_SPI 459 IRQ_TYPE_LEVEL_HIGH>, + <25 0 &gic GIC_SPI 460 IRQ_TYPE_LEVEL_HIGH>, + <26 0 &gic GIC_SPI 461 IRQ_TYPE_LEVEL_HIGH>, + <27 0 &gic GIC_SPI 462 IRQ_TYPE_LEVEL_HIGH>, + <28 0 &gic GIC_SPI 463 IRQ_TYPE_LEVEL_HIGH>, + <29 0 &gic GIC_SPI 464 IRQ_TYPE_LEVEL_HIGH>, + <30 0 &gic GIC_SPI 465 IRQ_TYPE_LEVEL_HIGH>, + <31 0 &gic GIC_SPI 466 IRQ_TYPE_LEVEL_HIGH>, + <32 0 &gic GIC_SPI 467 IRQ_TYPE_LEVEL_HIGH>, + <33 0 &gic GIC_SPI 468 IRQ_TYPE_LEVEL_HIGH>, + <34 0 &gic GIC_SPI 469 IRQ_TYPE_LEVEL_HIGH>, + <35 0 &gic GIC_SPI 470 IRQ_TYPE_LEVEL_HIGH>, + <36 0 &gic GIC_SPI 471 IRQ_TYPE_LEVEL_HIGH>, + <37 0 &gic GIC_SPI 472 IRQ_TYPE_LEVEL_HIGH>, + <38 0 &gic GIC_SPI 473 IRQ_TYPE_LEVEL_HIGH>, + <39 0 &gic GIC_SPI 474 IRQ_TYPE_LEVEL_HIGH>, + <40 0 &gic GIC_SPI 475 IRQ_TYPE_LEVEL_HIGH>; + interrupt-map-mask = <40 0>; + 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 Wed Nov 10 22:58:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 517193 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7BD6DC433FE for ; Wed, 10 Nov 2021 22:58:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 597AB61284 for ; Wed, 10 Nov 2021 22:58:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234032AbhKJXBQ (ORCPT ); Wed, 10 Nov 2021 18:01:16 -0500 Received: from relmlor1.renesas.com ([210.160.252.171]:38670 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S233848AbhKJXBO (ORCPT ); Wed, 10 Nov 2021 18:01:14 -0500 X-IronPort-AV: E=Sophos;i="5.87,225,1631545200"; d="scan'208";a="99834525" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 11 Nov 2021 07:58:24 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id BF8884006CC7; Thu, 11 Nov 2021 07:58:21 +0900 (JST) From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Linus Walleij , Geert Uytterhoeven , Magnus Damm , Bartosz Golaszewski , Philipp Zabel Cc: devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v3 2/7] irqchip: Add RZ/G2L IA55 Interrupt Controller driver Date: Wed, 10 Nov 2021 22:58:03 +0000 Message-Id: <20211110225808.16388-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-gpio@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 | 465 ++++++++++++++++++++++++++++ 3 files changed, 474 insertions(+) create mode 100644 drivers/irqchip/irq-renesas-rzg2l.c diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 4d5924e9f766..79b8c9274fd7 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -236,6 +236,14 @@ 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 IRQC support" if COMPILE_TEST + select GENERIC_IRQ_CHIP + select IRQ_DOMAIN_HIERARCHY + help + Enable support for the Renesas RZ/G2L 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 f88cbf36a9d2..8017786fbdac 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..4258b9752c3b --- /dev/null +++ b/drivers/irqchip/irq-renesas-rzg2l.c @@ -0,0 +1,465 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas RZ/G2L IRQC Driver + * + * Copyright (C) 2021 Renesas Electronics Corporation. + * + * Author: Lad Prabhakar + */ + +#include +#include +#include +#include +#include +#include +#include + +#define IRQC_IRQ_START 1 +#define IRQC_IRQ_COUNT 8 +#define IRQC_TINT_START 9 +#define IRQC_TINT_COUNT 32 +#define IRQC_NUM_IRQ 41 + +#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) ((x) & ~GENMASK(31, 16)) +#define TINT_EXTRACT_GPIOINT(x) ((x) >> 16) + +struct rzg2l_irqc_priv { + void __iomem *base; + struct of_phandle_args map[IRQC_NUM_IRQ]; +}; + +struct rzg2l_irqc_chip_data { + int tint; +}; + +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) +{ + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START; + u16 bit = BIT(hw_irq); + u32 reg; + + reg = readl_relaxed(priv->base + ISCR); + if (reg & bit) + writel_relaxed(GENMASK(IRQC_IRQ_COUNT - 1, 0) & ~bit, + priv->base + ISCR); + + irq_chip_eoi_parent(d); +} + +static void rzg2l_tint_eoi(struct irq_data *d) +{ + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + unsigned int hw_irq = irqd_to_hwirq(d); + u32 bit = BIT(hw_irq - IRQC_TINT_START); + u32 reg; + + reg = readl_relaxed(priv->base + TSCR); + if (reg & bit) + writel_relaxed(GENMASK(IRQC_TINT_COUNT - 1, 0) & ~bit, + priv->base + TSCR); + + irq_chip_eoi_parent(d); +} + +static void rzg2l_irqc_eoi(struct irq_data *d) +{ + unsigned int hw_irq = irqd_to_hwirq(d); + + if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT) + return rzg2l_irq_eoi(d); + else if (hw_irq >= IRQC_TINT_START && hw_irq <= IRQC_TINT_COUNT) + return rzg2l_tint_eoi(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_TINT_COUNT) { + 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; + + reg = readl_relaxed(priv->base + TSSR(tssr_index)); + reg &= ~(TSSEL_MASK << tssr_offset); + writel_relaxed(reg, priv->base + TSSR(tssr_index)); + } + 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_TINT_COUNT) { + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + struct rzg2l_irqc_chip_data *chip_data = d->chip_data; + u32 offset = hw_irq - IRQC_TINT_START; + u32 tssr_offset = TSSR_OFFSET(offset); + u8 tssr_index = TSSR_INDEX(offset); + u32 reg; + + reg = readl_relaxed(priv->base + TSSR(tssr_index)); + reg |= (TIEN | chip_data->tint) << TSSEL_SHIFT(tssr_offset); + writel_relaxed(reg, priv->base + TSSR(tssr_index)); + } + irq_chip_enable_parent(d); +} + +static int rzg2l_irq_set_type(struct irq_data *d, unsigned int type) +{ + struct rzg2l_irqc_priv *priv = irq_data_to_priv(d); + unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START; + 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; + } + + tmp = readl_relaxed(priv->base + IITSR); + tmp &= ~IITSR_IITSEL_MASK(hw_irq); + tmp |= IITSR_IITSEL(hw_irq, sense); + writel_relaxed(tmp, priv->base + IITSR); + + 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; + 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; + } + + if (titseln < TITSR0_MAX_INT) { + reg = readl_relaxed(priv->base + TITSR0); + reg &= ~(IRQ_MASK << (titseln * TITSEL_WIDTH)); + reg |= sense << (titseln * TITSEL_WIDTH); + writel_relaxed(reg, priv->base + TITSR0); + } else { + titseln = titseln / TITSEL_WIDTH; + reg = readl_relaxed(priv->base + TITSR1); + reg &= ~(IRQ_MASK << (titseln * TITSEL_WIDTH)); + reg |= sense << (titseln * TITSEL_WIDTH); + writel_relaxed(reg, priv->base + TITSR1); + } + + return 0; +} + +static int rzg2l_irqc_set_type(struct irq_data *d, unsigned int type) +{ + unsigned int hw_irq = irqd_to_hwirq(d); + + if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT) + return rzg2l_irq_set_type(d, type); + else if (hw_irq >= IRQC_TINT_START && hw_irq <= IRQC_TINT_COUNT) + return rzg2l_tint_set_edge(d, type); + + return -EINVAL; +} + +static 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; + struct rzg2l_irqc_chip_data *chip_data = NULL; + struct irq_fwspec spec; + irq_hw_number_t hwirq; + int tint = -EINVAL; + unsigned int type; + unsigned int i; + int ret; + + ret = irq_domain_translate_twocell(domain, arg, &hwirq, &type); + if (ret) + return ret; + + /* + * For TINIT interrupts ie where pinctrl driver is child of irqc domain + * the hwirq and TINT are encoded in fwspec->param[0]. + * hwirq for TINIT range from 9-40, hwirq is embedded 0-15 bits and TINT + * from 16-31 bits. TINIT from the pinctrl drivers 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_NUM_IRQ - 1)) + return -EINVAL; + + if (tint != -EINVAL && (hwirq < IRQC_TINT_START || hwirq > (IRQC_NUM_IRQ - 1))) + return -EINVAL; + + chip_data = kzalloc(sizeof(*chip_data), GFP_KERNEL); + if (!chip_data) + return -ENOMEM; + chip_data->tint = tint; + + ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &irqc_chip, + chip_data); + if (ret) { + kfree(chip_data); + return ret; + } + + spec.fwnode = domain->parent->fwnode; + spec.param_count = priv->map[hwirq].args_count; + for (i = 0; i < spec.param_count; i++) + spec.param[i] = priv->map[hwirq].args[i]; + + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &spec); + if (ret) + kfree(chip_data); + + return ret; +} + +static void rzg2l_irqc_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 rzg2l_irqc_chip_data *chip_data = d->chip_data; + + kfree(chip_data); + } + irq_domain_free_irqs_common(domain, virq, nr_irqs); +} + +static const struct irq_domain_ops rzg2l_irqc_domain_ops = { + .alloc = rzg2l_irqc_alloc, + .free = rzg2l_irqc_domain_free, + .translate = irq_domain_translate_twocell, +}; + +static int rzg2l_irqc_parse_map(struct rzg2l_irqc_priv *priv, + struct device_node *np, + struct device_node *parent) +{ + unsigned int imaplen, i, j, ret; + struct device_node *ipar; + const __be32 *imap; + u32 intsize; + + imap = of_get_property(np, "interrupt-map", &imaplen); + if (!imap) + return -EINVAL; + + for (i = 0; i < IRQC_NUM_IRQ; i++) { + if (imaplen < 3) + return -EINVAL; + + /* Check interrupt number, ignore sense */ + if (be32_to_cpup(imap) != i) + return -EINVAL; + + ipar = of_find_node_by_phandle(be32_to_cpup(imap + 2)); + if (ipar != parent) { + of_node_put(ipar); + return -EINVAL; + } + + imap += 3; + imaplen -= 3; + + ret = of_property_read_u32(ipar, "#interrupt-cells", &intsize); + of_node_put(ipar); + if (ret) + return ret; + + if (imaplen < intsize) + return -EINVAL; + + priv->map[i].args_count = intsize; + for (j = 0; j < intsize; j++) + priv->map[i].args[j] = be32_to_cpup(imap++); + + imaplen -= intsize; + } + + return 0; +} + +static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent) +{ + struct irq_domain *irq_domain, *parent_domain; + struct reset_control *resetn; + struct rzg2l_irqc_priv *priv; + struct clk *clk; + struct clk *pclk; + int ret; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->base = of_iomap(node, 0); + if (!priv->base) { + ret = -ENXIO; + goto free_priv; + } + + clk = of_clk_get_by_name(node, "clk"); + if (IS_ERR(clk)) { + ret = IS_ERR(clk); + goto iounmap_base; + } + + pclk = of_clk_get_by_name(node, "pclk"); + if (IS_ERR(pclk)) { + ret = IS_ERR(pclk); + goto iounmap_base; + } + + resetn = of_reset_control_get_exclusive_by_index(node, 0); + if (IS_ERR(resetn)) { + ret = IS_ERR(resetn); + goto iounmap_base; + } + + parent_domain = irq_find_host(parent); + if (!parent_domain) { + pr_err("%pOF: cannot find parent domain\n", node); + ret = -ENODEV; + goto iounmap_base; + } + + ret = rzg2l_irqc_parse_map(priv, node, parent); + if (ret) { + pr_err("%pOF: cannot parse interrupt-map: %d\n", node, ret); + goto iounmap_base; + } + + ret = reset_control_deassert(resetn); + if (ret) { + pr_err("%pOF: failed to deassert resetn pin, %d\n", node, ret); + goto iounmap_base; + } + + ret = clk_prepare_enable(clk); + if (ret) + goto assert_reset; + + ret = clk_prepare_enable(pclk); + if (ret) + goto disable_clk; + + irq_domain = irq_domain_add_hierarchy(parent_domain, 0, IRQC_NUM_IRQ, + node, &rzg2l_irqc_domain_ops, + priv); + if (!irq_domain) { + pr_err("%pOF: cannot initialize irq domain\n", node); + ret = -ENOMEM; + goto fail_irq_domain; + } + + return 0; + +fail_irq_domain: + clk_disable_unprepare(pclk); +disable_clk: + clk_disable_unprepare(clk); +assert_reset: + reset_control_assert(resetn); +iounmap_base: + iounmap(priv->base); +free_priv: + kfree(priv); + 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 v2"); From patchwork Wed Nov 10 22:58:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 517192 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E556C433FE for ; Wed, 10 Nov 2021 22:58:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A3FA6108B for ; Wed, 10 Nov 2021 22:58:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234074AbhKJXB2 (ORCPT ); Wed, 10 Nov 2021 18:01:28 -0500 Received: from relmlor1.renesas.com ([210.160.252.171]:51486 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234064AbhKJXBX (ORCPT ); Wed, 10 Nov 2021 18:01:23 -0500 X-IronPort-AV: E=Sophos;i="5.87,225,1631545200"; d="scan'208";a="99834541" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 11 Nov 2021 07:58:34 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id E400F400492A; Thu, 11 Nov 2021 07:58:31 +0900 (JST) From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Linus Walleij , Geert Uytterhoeven , Magnus Damm , Bartosz Golaszewski , Philipp Zabel Cc: devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v3 5/7] gpio: gpiolib: Add ngirq member to struct gpio_irq_chip Date: Wed, 10 Nov 2021 22:58:06 +0000 Message-Id: <20211110225808.16388-6-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Number of GPIO IRQ's supported by the chip is not always equal to the number of GPIO pins. For example on Renesas RZ/G2L SoC where it has GPIO0-122 pins but at a give point a maximum of only 32 GPIO pins can be used as IRQ lines in the IRQC domain. This patch adds ngirq member to struct gpio_irq_chip and passes this as a size to irq_domain_create_hierarchy()/irq_domain_create_simple() if it is being set in the driver otherwise fallbacks to using ngpio. Signed-off-by: Lad Prabhakar --- drivers/gpio/gpiolib.c | 4 ++-- include/linux/gpio/driver.h | 8 ++++++++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 30aabef37468..36a8eefe91b9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1185,7 +1185,7 @@ static int gpiochip_hierarchy_add_domain(struct gpio_chip *gc) gc->irq.domain = irq_domain_create_hierarchy( gc->irq.parent_domain, 0, - gc->ngpio, + gc->irq.ngirq ? gc->irq.ngirq : gc->ngpio, gc->irq.fwnode, &gc->irq.child_irq_domain_ops, gc); @@ -1528,7 +1528,7 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc, } else { /* Some drivers provide custom irqdomain ops */ gc->irq.domain = irq_domain_create_simple(fwnode, - gc->ngpio, + gc->irq.ngirq ? gc->irq.ngirq : gc->ngpio, gc->irq.first, gc->irq.domain_ops ?: &gpiochip_domain_ops, gc); diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index a0f9901dcae6..129945bfe3e7 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -51,6 +51,14 @@ struct gpio_irq_chip { */ const struct irq_domain_ops *domain_ops; + /** + * @ngirq: + * + * The number of GPIO IRQ's handled by this IRQ domain; usually is + * equal to ngpio + */ + u16 ngirq; + #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY /** * @fwnode: From patchwork Wed Nov 10 22:58:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 517191 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3AC2C433FE for ; Wed, 10 Nov 2021 22:58:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFF6661360 for ; Wed, 10 Nov 2021 22:58:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234128AbhKJXBf (ORCPT ); Wed, 10 Nov 2021 18:01:35 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:20993 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234159AbhKJXBa (ORCPT ); Wed, 10 Nov 2021 18:01:30 -0500 X-IronPort-AV: E=Sophos;i="5.87,225,1631545200"; d="scan'208";a="100143755" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 11 Nov 2021 07:58:41 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id B709F400754F; Thu, 11 Nov 2021 07:58:38 +0900 (JST) From: Lad Prabhakar To: Marc Zyngier , Thomas Gleixner , Rob Herring , Linus Walleij , Geert Uytterhoeven , Magnus Damm , Bartosz Golaszewski , Philipp Zabel Cc: devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v3 7/7] arm64: dts: renesas: r9a07g044: Add IRQC node to SoC DTSI Date: Wed, 10 Nov 2021 22:58:08 +0000 Message-Id: <20211110225808.16388-8-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20211110225808.16388-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add IRQC node to R9A07G044 (RZ/G2L) SoC DTSI. Signed-off-by: Lad Prabhakar --- arch/arm64/boot/dts/renesas/r9a07g044.dtsi | 60 ++++++++++++++++++++++ 1 file changed, 60 insertions(+) diff --git a/arch/arm64/boot/dts/renesas/r9a07g044.dtsi b/arch/arm64/boot/dts/renesas/r9a07g044.dtsi index 358db254c4ea..c42ff2ed3144 100644 --- a/arch/arm64/boot/dts/renesas/r9a07g044.dtsi +++ b/arch/arm64/boot/dts/renesas/r9a07g044.dtsi @@ -504,6 +504,10 @@ reg = <0 0x11030000 0 0x10000>; gpio-controller; #gpio-cells = <2>; + #address-cells = <2>; + #interrupt-cells = <2>; + interrupt-parent = <&irqc>; + interrupt-controller; gpio-ranges = <&pinctrl 0 0 392>; clocks = <&cpg CPG_MOD R9A07G044_GPIO_HCLK>; power-domains = <&cpg>; @@ -512,6 +516,62 @@ <&cpg R9A07G044_GPIO_SPARE_RESETN>; }; + irqc: interrupt-controller@110a0000 { + compatible = "renesas,r9a07g044-irqc", + "renesas,rzg2l-irqc"; + #interrupt-cells = <2>; + #address-cells = <0>; + interrupt-controller; + reg = <0 0x110a0000 0 0x10000>; + interrupt-map = <0 0 &gic GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>, + <1 0 &gic GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>, + <2 0 &gic GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>, + <3 0 &gic GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>, + <4 0 &gic GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>, + <5 0 &gic GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>, + <6 0 &gic GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>, + <7 0 &gic GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>, + <8 0 &gic GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>, + <9 0 &gic GIC_SPI 444 IRQ_TYPE_LEVEL_HIGH>, + <10 0 &gic GIC_SPI 445 IRQ_TYPE_LEVEL_HIGH>, + <11 0 &gic GIC_SPI 446 IRQ_TYPE_LEVEL_HIGH>, + <12 0 &gic GIC_SPI 447 IRQ_TYPE_LEVEL_HIGH>, + <13 0 &gic GIC_SPI 448 IRQ_TYPE_LEVEL_HIGH>, + <14 0 &gic GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>, + <15 0 &gic GIC_SPI 450 IRQ_TYPE_LEVEL_HIGH>, + <16 0 &gic GIC_SPI 451 IRQ_TYPE_LEVEL_HIGH>, + <17 0 &gic GIC_SPI 452 IRQ_TYPE_LEVEL_HIGH>, + <18 0 &gic GIC_SPI 453 IRQ_TYPE_LEVEL_HIGH>, + <19 0 &gic GIC_SPI 454 IRQ_TYPE_LEVEL_HIGH>, + <20 0 &gic GIC_SPI 455 IRQ_TYPE_LEVEL_HIGH>, + <21 0 &gic GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>, + <22 0 &gic GIC_SPI 457 IRQ_TYPE_LEVEL_HIGH>, + <23 0 &gic GIC_SPI 458 IRQ_TYPE_LEVEL_HIGH>, + <24 0 &gic GIC_SPI 459 IRQ_TYPE_LEVEL_HIGH>, + <25 0 &gic GIC_SPI 460 IRQ_TYPE_LEVEL_HIGH>, + <26 0 &gic GIC_SPI 461 IRQ_TYPE_LEVEL_HIGH>, + <27 0 &gic GIC_SPI 462 IRQ_TYPE_LEVEL_HIGH>, + <28 0 &gic GIC_SPI 463 IRQ_TYPE_LEVEL_HIGH>, + <29 0 &gic GIC_SPI 464 IRQ_TYPE_LEVEL_HIGH>, + <30 0 &gic GIC_SPI 465 IRQ_TYPE_LEVEL_HIGH>, + <31 0 &gic GIC_SPI 466 IRQ_TYPE_LEVEL_HIGH>, + <32 0 &gic GIC_SPI 467 IRQ_TYPE_LEVEL_HIGH>, + <33 0 &gic GIC_SPI 468 IRQ_TYPE_LEVEL_HIGH>, + <34 0 &gic GIC_SPI 469 IRQ_TYPE_LEVEL_HIGH>, + <35 0 &gic GIC_SPI 470 IRQ_TYPE_LEVEL_HIGH>, + <36 0 &gic GIC_SPI 471 IRQ_TYPE_LEVEL_HIGH>, + <37 0 &gic GIC_SPI 472 IRQ_TYPE_LEVEL_HIGH>, + <38 0 &gic GIC_SPI 473 IRQ_TYPE_LEVEL_HIGH>, + <39 0 &gic GIC_SPI 474 IRQ_TYPE_LEVEL_HIGH>, + <40 0 &gic GIC_SPI 475 IRQ_TYPE_LEVEL_HIGH>; + interrupt-map-mask = <40 0>; + 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>; + }; + dmac: dma-controller@11820000 { compatible = "renesas,r9a07g044-dmac", "renesas,rz-dmac";