From patchwork Thu Feb 13 15:58:45 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Grygorii Strashko X-Patchwork-Id: 3645951 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id DCE269F1EE for ; Thu, 13 Feb 2014 15:09:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E207A20158 for ; Thu, 13 Feb 2014 15:09:43 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 89FF720154 for ; Thu, 13 Feb 2014 15:09:42 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WDxus-0004rM-Kp; Thu, 13 Feb 2014 15:09:30 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WDxq0-0001yg-RX; Thu, 13 Feb 2014 15:04:28 +0000 Received: from devils.ext.ti.com ([198.47.26.153]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WDxpw-0001xx-Gz for linux-arm-kernel@lists.infradead.org; Thu, 13 Feb 2014 15:04:25 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id s1DF3x2S008385; Thu, 13 Feb 2014 09:03:59 -0600 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s1DF3xbf024015; Thu, 13 Feb 2014 09:03:59 -0600 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.2.342.3; Thu, 13 Feb 2014 09:03:59 -0600 Received: from localhost (dlep60.itg.ti.com [157.170.170.21]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s1DF3wNO018886; Thu, 13 Feb 2014 09:03:59 -0600 From: Grygorii Strashko To: Linus Walleij , Subject: [RESEND][PATCH v4] gpio: davinci: reuse for keystone soc Date: Thu, 13 Feb 2014 17:58:45 +0200 Message-ID: <1392307125-27927-1-git-send-email-grygorii.strashko@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <52FBB6BC.2060801@ti.com> References: <52FBB6BC.2060801@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140213_100424_631016_B47DE18A X-CRM114-Status: GOOD ( 16.25 ) X-Spam-Score: -7.6 (-------) Cc: Alexandre Courbot , davinci-linux-open-source@linux.davincidsp.com, Grygorii Strashko , devicetree@vger.kernel.org, nsekhar@ti.com, Rob Herring , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The similar GPIO HW block is used by keystone SoCs as in Davinci SoCs. Hence, reuse Davinci GPIO driver for Keystone taking into account that Keystone contains ARM GIC IRQ controller which is implemented using IRQ Chip. Documentation: http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf Acked-by: Santosh Shilimkar Acked-by: Linus Walleij Signed-off-by: Grygorii Strashko --- - rebased on top of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git branch: devel top commit: ef70bbe gpio: make gpiod_direction_output take a logical value .../devicetree/bindings/gpio/gpio-davinci.txt | 4 +- drivers/gpio/gpio-davinci.c | 48 ++++++++++++++++---- 2 files changed, 42 insertions(+), 10 deletions(-) diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt index a2e839d..4ce9862 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt @@ -1,7 +1,7 @@ -Davinci GPIO controller bindings +Davinci/Keystone GPIO controller bindings Required Properties: -- compatible: should be "ti,dm6441-gpio" +- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio" - reg: Physical base address of the controller and the size of memory mapped registers. diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 7629b4f..d0f135d 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -37,6 +37,8 @@ struct davinci_gpio_regs { u32 intstat; }; +typedef struct irq_chip *(*gpio_get_irq_chip_cb_t)(unsigned int irq); + #define BINTEN 0x8 /* GPIO Interrupt Per-Bank Enable Register */ #define chip2controller(chip) \ @@ -413,6 +415,26 @@ static const struct irq_domain_ops davinci_gpio_irq_ops = { .xlate = irq_domain_xlate_onetwocell, }; +static struct irq_chip *davinci_gpio_get_irq_chip(unsigned int irq) +{ + static struct irq_chip_type gpio_unbanked; + + gpio_unbanked = *container_of(irq_get_chip(irq), + struct irq_chip_type, chip); + + return &gpio_unbanked.chip; +}; + +static struct irq_chip *keystone_gpio_get_irq_chip(unsigned int irq) +{ + static struct irq_chip gpio_unbanked; + + gpio_unbanked = *irq_get_chip(irq); + return &gpio_unbanked; +}; + +static const struct of_device_id davinci_gpio_ids[]; + /* * NOTE: for suspend/resume, probably best to make a platform_device with * suspend_late/resume_resume calls hooking into results of the set_wake() @@ -433,6 +455,18 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) struct davinci_gpio_platform_data *pdata = dev->platform_data; struct davinci_gpio_regs __iomem *g; struct irq_domain *irq_domain = NULL; + const struct of_device_id *match; + struct irq_chip *irq_chip; + gpio_get_irq_chip_cb_t gpio_get_irq_chip; + + /* + * Use davinci_gpio_get_irq_chip by default to handle non DT cases + */ + gpio_get_irq_chip = davinci_gpio_get_irq_chip; + match = of_match_device(of_match_ptr(davinci_gpio_ids), + dev); + if (match) + gpio_get_irq_chip = (gpio_get_irq_chip_cb_t)match->data; ngpio = pdata->ngpio; res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); @@ -489,8 +523,6 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) * IRQ mux conflicts; gpio_irq_type_unbanked() is only for GPIOs. */ if (pdata->gpio_unbanked) { - static struct irq_chip_type gpio_unbanked; - /* pass "bank 0" GPIO IRQs to AINTC */ chips[0].chip.to_irq = gpio_to_irq_unbanked; chips[0].gpio_irq = bank_irq; @@ -499,10 +531,9 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) /* AINTC handles mask/unmask; GPIO handles triggering */ irq = bank_irq; - gpio_unbanked = *container_of(irq_get_chip(irq), - struct irq_chip_type, chip); - gpio_unbanked.chip.name = "GPIO-AINTC"; - gpio_unbanked.chip.irq_set_type = gpio_irq_type_unbanked; + irq_chip = gpio_get_irq_chip(irq); + irq_chip->name = "GPIO-AINTC"; + irq_chip->irq_set_type = gpio_irq_type_unbanked; /* default trigger: both edges */ g = gpio2regs(0); @@ -511,7 +542,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev) /* set the direct IRQs up to use that irqchip */ for (gpio = 0; gpio < pdata->gpio_unbanked; gpio++, irq++) { - irq_set_chip(irq, &gpio_unbanked.chip); + irq_set_chip(irq, irq_chip); irq_set_handler_data(irq, &chips[gpio / 32]); irq_set_status_flags(irq, IRQ_TYPE_EDGE_BOTH); } @@ -554,7 +585,8 @@ done: #if IS_ENABLED(CONFIG_OF) static const struct of_device_id davinci_gpio_ids[] = { - { .compatible = "ti,dm6441-gpio", }, + { .compatible = "ti,keystone-gpio", keystone_gpio_get_irq_chip}, + { .compatible = "ti,dm6441-gpio", davinci_gpio_get_irq_chip}, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, davinci_gpio_ids);