From patchwork Tue Apr 17 12:42:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Phil Edworthy X-Patchwork-Id: 10344929 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 26B7860542 for ; Tue, 17 Apr 2018 12:43:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1AB1F28A8F for ; Tue, 17 Apr 2018 12:43:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C4B028A98; Tue, 17 Apr 2018 12:43:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7510C28A8F for ; Tue, 17 Apr 2018 12:43:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753125AbeDQMnK (ORCPT ); Tue, 17 Apr 2018 08:43:10 -0400 Received: from relmlor4.renesas.com ([210.160.252.174]:37707 "EHLO relmlie3.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752609AbeDQMnJ (ORCPT ); Tue, 17 Apr 2018 08:43:09 -0400 Received: from unknown (HELO relmlir2.idc.renesas.com) ([10.200.68.152]) by relmlie3.idc.renesas.com with ESMTP; 17 Apr 2018 21:43:07 +0900 Received: from relmlii1.idc.renesas.com (relmlii1.idc.renesas.com [10.200.68.65]) by relmlir2.idc.renesas.com (Postfix) with ESMTP id 49D5A97EB0; Tue, 17 Apr 2018 21:43:07 +0900 (JST) X-IronPort-AV: E=Sophos;i="5.48,463,1517842800"; d="scan'208";a="277046291" Received: from unknown (HELO vbox.ree.adwin.renesas.com) ([10.226.37.67]) by relmlii1.idc.renesas.com with ESMTP; 17 Apr 2018 21:43:03 +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 v4] gpio: dwapb: Add support for 1 interrupt per port A GPIO Date: Tue, 17 Apr 2018 13:42:57 +0100 Message-Id: <1523968977-4241-1-git-send-email-phil.edworthy@renesas.com> X-Mailer: git-send-email 2.7.4 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Reviewed-by: Rob Herring Acked-by: Lee Jones --- One point to mention is that I have made it possible for users to have unconncted interrupts by specifying holes in the list of interrupts. This is done by supporting the interrupts-extended DT prop. However, I have no use for this and had to hack some test case for this. Perhaps the driver should support 1 interrupt or all GPIOa as interrupts? v4: - Use of_irq_get() instead of of_irq_parse_one()+irq_create_of_mapping() v3: - Rolled mfd: intel_quark_i2c_gpio fix into this patch to avoid bisect problems 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. snps:gpio fix Signed-off-by: Phil Edworthy --- .../devicetree/bindings/gpio/snps-dwapb-gpio.txt | 9 +++-- drivers/gpio/gpio-dwapb.c | 42 +++++++++++++++++----- drivers/mfd/intel_quark_i2c_gpio.c | 3 +- include/linux/platform_data/gpio-dwapb.h | 3 +- 4 files changed, 44 insertions(+), 13 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..7a1022f 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 +606,32 @@ 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); + 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++) { + int irq = of_irq_get(np, j); + if (irq < 0) + continue; + + pp->irq[j] = irq; + 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/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c index 90e35de..5bddb84 100644 --- a/drivers/mfd/intel_quark_i2c_gpio.c +++ b/drivers/mfd/intel_quark_i2c_gpio.c @@ -233,7 +233,8 @@ static int intel_quark_gpio_setup(struct pci_dev *pdev, struct mfd_cell *cell) pdata->properties->idx = 0; pdata->properties->ngpio = INTEL_QUARK_MFD_NGPIO; pdata->properties->gpio_base = INTEL_QUARK_MFD_GPIO_BASE; - pdata->properties->irq = pdev->irq; + pdata->properties->irq[0] = pdev->irq; + pdata->properties->has_irq = true; pdata->properties->irq_shared = true; cell->platform_data = pdata; 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; };