From patchwork Thu Apr 7 14:47:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Breathitt Gray X-Patchwork-Id: 607420 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3qglqs3VSLz9t3t for ; Fri, 8 Apr 2016 00:50:01 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=nzbsSo7B; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932105AbcDGOs5 (ORCPT ); Thu, 7 Apr 2016 10:48:57 -0400 Received: from mail-yw0-f194.google.com ([209.85.161.194]:34054 "EHLO mail-yw0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932076AbcDGOsx (ORCPT ); Thu, 7 Apr 2016 10:48:53 -0400 Received: by mail-yw0-f194.google.com with SMTP id h6so9086498ywc.1; Thu, 07 Apr 2016 07:48:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=6/skW5XZ1VJb4/EL3+zDie3WksgGsFkQGSNq23eqVsU=; b=nzbsSo7BnvWzytfAUPMvuKaWOgMYrUuQ5ts3MIUhNLnWGo+e+A9+f9fEPaUoDBt6h5 5qZt5PkMDaXAIzBgo8WXrEwg1Mds/H64VtQHFB0KRW8VXJAeSNR9bpZzco2to00KPOxF 08ujM3jSZiW+FJEgpG2Gpy25whtEDeQeRMpi36kR1LoUi4Y1k3nekvR1WgCDm07nJYCh pgd+8mxTT+P5eLE1HvQcH2ILBesXSddfIZWI1SjcFC+jieTcndz4sDUarWGK+HIghxmZ pjomJhfjMB+s5y/F6Svjkti9fR2YCGYQWjRLi9190iA19atLpRbN+q7RUoTKWQCZM/43 F5/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=6/skW5XZ1VJb4/EL3+zDie3WksgGsFkQGSNq23eqVsU=; b=mxJKDrCTeJCI68Bloj9NVlCUcmBI3bnwUJ4YCBJEF3i+nbf12h2vM212Ex6y8X+gq6 OGMfm0sf9CkmACaDwDIXhU0I3LHcaIDSJKxfymDGTNDsHVzX0uSlVYfKWx1qkjrcQUA5 gpSK8jFu7AXlPZhjqRTjmgTibpPQHcpC+LbEHTej512pwelQm7nNOK/PQRpyO3MEGjDr Ci6PsBR1YCUA3GSg6BtI/uJwZ5WCxCbhFUsPixC9OPlxA0JScs8ZAtYCP4muNxDV6fWl aH58oU4KiIjldqnVw1AE4FHAOn5ZxcDVX5d0WdqQSdVxcztpQ/D/dghh8EAbtNd5sIt4 iAPw== X-Gm-Message-State: AD7BkJJHkD2r6TwvmSRi/povO2dhAkx6Js/Hfus4COg4BkA58vghDhU6veY12V6oTW0COg== X-Received: by 10.37.81.137 with SMTP id f131mr1795442ybb.54.1460040532578; Thu, 07 Apr 2016 07:48:52 -0700 (PDT) Received: from localhost (71-47-58-73.res.bhn.net. [71.47.58.73]) by smtp.gmail.com with ESMTPSA id f186sm4950509ywa.6.2016.04.07.07.48.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Apr 2016 07:48:52 -0700 (PDT) From: William Breathitt Gray To: gregkh@linuxfoundation.org, tglx@linutronix.de, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, wim@iguana.be, linux@roeck-us.net, linus.walleij@linaro.org, gnurou@gmail.com Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-gpio@vger.kernel.org, William Breathitt Gray Subject: [PATCH 08/10] gpio: 104-idi-48: Utilize the ISA bus driver Date: Thu, 7 Apr 2016 10:47:29 -0400 Message-Id: <5eb3b64deac39a9fa62f2b441ac4c38cfd5a5eca.1460040201.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.7.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The ACCES 104-IDI-48 series communicates via the ISA bus. As such, it is more appropriate to use the ISA bus driver over the platform driver to control the ACCES 104-IDI-48 GPIO driver. This patch also adds support for multiple devices via the base and irq module array parameters. Each element of the base array corresponds to a discrete device; each element of the irq array corresponds to the respective device addressed in the respective base array element. Signed-off-by: William Breathitt Gray --- drivers/gpio/Kconfig | 10 +++-- drivers/gpio/gpio-104-idi-48.c | 86 ++++++++++++++---------------------------- 2 files changed, 34 insertions(+), 62 deletions(-) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 4ce3f8d..46db6fc 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -536,12 +536,14 @@ config GPIO_104_IDIO_16 config GPIO_104_IDI_48 tristate "ACCES 104-IDI-48 GPIO support" + depends on ISA_BUS select GPIOLIB_IRQCHIP help - Enables GPIO support for the ACCES 104-IDI-48 family. The base port - address for the device may be configured via the idi_48_base module - parameter. The interrupt line number for the device may be configured - via the idi_48_irq module parameter. + Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A, + 104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for + the devices may be configured via the base module parameter. The + interrupt line numbers for the devices may be configured via the irq + module parameter. config GPIO_F7188X tristate "F71869, F71869A, F71882FG, F71889F and F81866 GPIO support" diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c index e37cd4c..6c75c83 100644 --- a/drivers/gpio/gpio-104-idi-48.c +++ b/drivers/gpio/gpio-104-idi-48.c @@ -10,6 +10,9 @@ * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. + * + * This driver supports the following ACCES devices: 104-IDI-48A, + * 104-IDI-48AC, 104-IDI-48B, and 104-IDI-48BC. */ #include #include @@ -19,18 +22,23 @@ #include #include #include +#include #include #include #include -#include #include -static unsigned idi_48_base; -module_param(idi_48_base, uint, 0); -MODULE_PARM_DESC(idi_48_base, "ACCES 104-IDI-48 base address"); -static unsigned idi_48_irq; -module_param(idi_48_irq, uint, 0); -MODULE_PARM_DESC(idi_48_irq, "ACCES 104-IDI-48 interrupt line number"); +#define IDI_48_EXTENT 8 +#define MAX_NUM_IDI_48 max_num_isa_dev(IDI_48_EXTENT) + +static unsigned int base[MAX_NUM_IDI_48]; +static unsigned int num_idi_48; +module_param_array(base, uint, &num_idi_48, 0); +MODULE_PARM_DESC(base, "ACCES 104-IDI-48 base addresses"); + +static unsigned int irq[MAX_NUM_IDI_48]; +module_param_array(irq, uint, NULL, 0); +MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line numbers"); /** * struct idi_48_gpio - GPIO device private data structure @@ -211,23 +219,19 @@ static irqreturn_t idi_48_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } -static int __init idi_48_probe(struct platform_device *pdev) +static int idi_48_probe(struct device *dev, unsigned int id) { - struct device *dev = &pdev->dev; struct idi_48_gpio *idi48gpio; - const unsigned base = idi_48_base; - const unsigned extent = 8; const char *const name = dev_name(dev); int err; - const unsigned irq = idi_48_irq; idi48gpio = devm_kzalloc(dev, sizeof(*idi48gpio), GFP_KERNEL); if (!idi48gpio) return -ENOMEM; - if (!devm_request_region(dev, base, extent, name)) { + if (!devm_request_region(dev, base[id], IDI_48_EXTENT, name)) { dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", - base, base + extent); + base[id], base[id] + IDI_48_EXTENT); return -EBUSY; } @@ -239,8 +243,8 @@ static int __init idi_48_probe(struct platform_device *pdev) idi48gpio->chip.get_direction = idi_48_gpio_get_direction; idi48gpio->chip.direction_input = idi_48_gpio_direction_input; idi48gpio->chip.get = idi_48_gpio_get; - idi48gpio->base = base; - idi48gpio->irq = irq; + idi48gpio->base = base[id]; + idi48gpio->irq = irq[id]; spin_lock_init(&idi48gpio->lock); @@ -253,8 +257,8 @@ static int __init idi_48_probe(struct platform_device *pdev) } /* Disable IRQ by default */ - outb(0, base + 7); - inb(base + 7); + outb(0, base[id] + 7); + inb(base[id] + 7); err = gpiochip_irqchip_add(&idi48gpio->chip, &idi_48_irqchip, 0, handle_edge_irq, IRQ_TYPE_NONE); @@ -263,7 +267,7 @@ static int __init idi_48_probe(struct platform_device *pdev) goto err_gpiochip_remove; } - err = request_irq(irq, idi_48_irq_handler, IRQF_SHARED, name, + err = request_irq(irq[id], idi_48_irq_handler, IRQF_SHARED, name, idi48gpio); if (err) { dev_err(dev, "IRQ handler registering failed (%d)\n", err); @@ -277,9 +281,9 @@ err_gpiochip_remove: return err; } -static int idi_48_remove(struct platform_device *pdev) +static int idi_48_remove(struct device *dev, unsigned int id) { - struct idi_48_gpio *const idi48gpio = platform_get_drvdata(pdev); + struct idi_48_gpio *const idi48gpio = dev_get_drvdata(dev); free_irq(idi48gpio->irq, idi48gpio); gpiochip_remove(&idi48gpio->chip); @@ -287,48 +291,14 @@ static int idi_48_remove(struct platform_device *pdev) return 0; } -static struct platform_device *idi_48_device; - -static struct platform_driver idi_48_driver = { +static struct isa_driver idi_48_driver = { + .probe = idi_48_probe, .driver = { .name = "104-idi-48" }, .remove = idi_48_remove }; - -static void __exit idi_48_exit(void) -{ - platform_device_unregister(idi_48_device); - platform_driver_unregister(&idi_48_driver); -} - -static int __init idi_48_init(void) -{ - int err; - - idi_48_device = platform_device_alloc(idi_48_driver.driver.name, -1); - if (!idi_48_device) - return -ENOMEM; - - err = platform_device_add(idi_48_device); - if (err) - goto err_platform_device; - - err = platform_driver_probe(&idi_48_driver, idi_48_probe); - if (err) - goto err_platform_driver; - - return 0; - -err_platform_driver: - platform_device_del(idi_48_device); -err_platform_device: - platform_device_put(idi_48_device); - return err; -} - -module_init(idi_48_init); -module_exit(idi_48_exit); +module_isa_driver(idi_48_driver, num_idi_48); MODULE_AUTHOR("William Breathitt Gray "); MODULE_DESCRIPTION("ACCES 104-IDI-48 GPIO driver");