From patchwork Fri Apr 13 08:08:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Phil Edworthy X-Patchwork-Id: 897879 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=renesas.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Mr5y6vV6z9s2t for ; Fri, 13 Apr 2018 18:09:26 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753724AbeDMIIw (ORCPT ); Fri, 13 Apr 2018 04:08:52 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:63818 "EHLO relmlie1.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753634AbeDMIIt (ORCPT ); Fri, 13 Apr 2018 04:08:49 -0400 Received: from unknown (HELO relmlir3.idc.renesas.com) ([10.200.68.153]) by relmlie1.idc.renesas.com with ESMTP; 13 Apr 2018 17:08:47 +0900 Received: from relmlii1.idc.renesas.com (relmlii1.idc.renesas.com [10.200.68.65]) by relmlir3.idc.renesas.com (Postfix) with ESMTP id 9749986166; Fri, 13 Apr 2018 17:08:47 +0900 (JST) X-IronPort-AV: E=Sophos;i="5.48,444,1517842800"; d="scan'208";a="276685072" Received: from unknown (HELO vbox.ree.adwin.renesas.com) ([10.226.37.67]) by relmlii1.idc.renesas.com with ESMTP; 13 Apr 2018 17:08:44 +0900 From: Phil Edworthy To: Hoan Tran , Linus Walleij , Rob Herring , Mark Rutland , Lee Jones Cc: Andy Shevchenko , Michel Pollet , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Phil Edworthy Subject: [PATCH v2 1/2] gpio: dwapb: Add support for 1 interrupt per port A GPIO Date: Fri, 13 Apr 2018 09:08:19 +0100 Message-Id: <1523606900-2332-2-git-send-email-phil.edworthy@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523606900-2332-1-git-send-email-phil.edworthy@renesas.com> References: <1523606900-2332-1-git-send-email-phil.edworthy@renesas.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The DesignWare GPIO IP can be configured for either 1 interrupt or 1 per GPIO in port A, but the driver currently only supports 1 interrupt. See the DesignWare DW_apb_gpio Databook description of the 'GPIO_INTR_IO' parameter. This change allows the driver to work with up to 32 interrupts, it will get as many interrupts as specified in the DT 'interrupts' property. It doesn't do anything clever with the different interrupts, it just calls the same handler used for single interrupt hardware. Signed-off-by: Phil Edworthy --- v2: - Replaced interrupt-mask DT prop with support for the interrupts-extended prop. This means replacing the call to irq_of_parse_and_map() with calls to of_irq_parse_one() and irq_create_of_mapping(). Note: There are a few *code* lines over 80 chars, but this is just guidance, right? Especially as there are already some lines over 80 chars. --- .../devicetree/bindings/gpio/snps-dwapb-gpio.txt | 9 ++++- drivers/gpio/gpio-dwapb.c | 43 +++++++++++++++++----- include/linux/platform_data/gpio-dwapb.h | 3 +- 3 files changed, 43 insertions(+), 12 deletions(-) diff --git a/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt b/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt index 4a75da7..3c1118b 100644 --- a/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt +++ b/Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt @@ -26,8 +26,13 @@ controller. the second encodes the triger flags encoded as described in Documentation/devicetree/bindings/interrupt-controller/interrupts.txt - interrupt-parent : The parent interrupt controller. -- interrupts : The interrupt to the parent controller raised when GPIOs - generate the interrupts. +- interrupts : The interrupts to the parent controller raised when GPIOs + generate the interrupts. If the controller provides one combined interrupt + for all GPIOs, specify a single interrupt. If the controller provides one + interrupt for each GPIO, provide a list of interrupts that correspond to each + of the GPIO pins. When specifying multiple interrupts, if any are unconnected, + use the interrupts-extended property to specify the interrupts and set the + interrupt controller handle for unused interrupts to 0. - snps,nr-gpios : The number of pins in the port, a single cell. - resets : Reset line for the controller. diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 226977f..3273504 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -441,14 +441,19 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, irq_gc->chip_types[1].handler = handle_edge_irq; if (!pp->irq_shared) { - irq_set_chained_handler_and_data(pp->irq, dwapb_irq_handler, - gpio); + int i; + + for (i = 0; i < pp->ngpio; i++) { + if (pp->irq[i]) + irq_set_chained_handler_and_data(pp->irq[i], + dwapb_irq_handler, gpio); + } } else { /* * Request a shared IRQ since where MFD would have devices * using the same irq pin */ - err = devm_request_irq(gpio->dev, pp->irq, + err = devm_request_irq(gpio->dev, pp->irq[0], dwapb_irq_handler_mfd, IRQF_SHARED, "gpio-dwapb-mfd", gpio); if (err) { @@ -524,7 +529,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, if (pp->idx == 0) port->gc.set_config = dwapb_gpio_set_config; - if (pp->irq) + if (pp->has_irq) dwapb_configure_irqs(gpio, port, pp); err = gpiochip_add_data(&port->gc, port); @@ -535,7 +540,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, port->is_registered = true; /* Add GPIO-signaled ACPI event support */ - if (pp->irq) + if (pp->has_irq) acpi_gpiochip_request_interrupts(&port->gc); return err; @@ -601,13 +606,33 @@ dwapb_gpio_get_pdata(struct device *dev) if (dev->of_node && pp->idx == 0 && fwnode_property_read_bool(fwnode, "interrupt-controller")) { - pp->irq = irq_of_parse_and_map(to_of_node(fwnode), 0); - if (!pp->irq) + struct device_node *np = to_of_node(fwnode); + struct of_phandle_args oirq; + unsigned int j; + + /* + * The IP has configuration options to allow a single + * combined interrupt or one per gpio. If one per gpio, + * some might not be used. + */ + for (j = 0; j < pp->ngpio; j++) { + if (of_irq_parse_one(np, j, &oirq)) + continue; + + pp->irq[j] = irq_create_of_mapping(&oirq); + if (pp->irq[j]) + pp->has_irq = true; + } + + if (!pp->has_irq) dev_warn(dev, "no irq for port%d\n", pp->idx); } - if (has_acpi_companion(dev) && pp->idx == 0) - pp->irq = platform_get_irq(to_platform_device(dev), 0); + if (has_acpi_companion(dev) && pp->idx == 0) { + pp->irq[0] = platform_get_irq(to_platform_device(dev), 0); + if (pp->irq[0]) + pp->has_irq = true; + } pp->irq_shared = false; pp->gpio_base = -1; diff --git a/include/linux/platform_data/gpio-dwapb.h b/include/linux/platform_data/gpio-dwapb.h index 2dc7f4a..5a52d69 100644 --- a/include/linux/platform_data/gpio-dwapb.h +++ b/include/linux/platform_data/gpio-dwapb.h @@ -19,7 +19,8 @@ struct dwapb_port_property { unsigned int idx; unsigned int ngpio; unsigned int gpio_base; - unsigned int irq; + unsigned int irq[32]; + bool has_irq; bool irq_shared; };