From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Wed, 24 Sep 2008 20:23:39 +0100 (BST) Received: from hall.aurel32.net ([91.121.138.14]:63163 "EHLO hall.aurel32.net") by ftp.linux-mips.org with ESMTP id S29588628AbYIXTXV (ORCPT ); Wed, 24 Sep 2008 20:23:21 +0100 Received: from volta.aurel32.net ([2002:52e8:2fb:1:21e:8cff:feb0:693b]) by hall.aurel32.net with esmtpsa (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from ) id 1KiZxI-0003oT-VP; Wed, 24 Sep 2008 21:23:21 +0200 Received: from aurel32 by volta.aurel32.net with local (Exim 4.69) (envelope-from ) id 1KiZxH-0005CW-PZ; Wed, 24 Sep 2008 21:23:19 +0200 Date: Wed, 24 Sep 2008 21:23:19 +0200 From: Aurelien Jarno To: Ralf Baechle Cc: linux-mips@linux-mips.org Subject: [PATCH 5/6] [MIPS] Add WGT634U reset button support Message-ID: <20080924192319.GF18700@volta.aurel32.net> References: <20080924191840.GA18700@volta.aurel32.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20080924191840.GA18700@volta.aurel32.net> X-Mailer: Mutt 1.5.18 (2008-05-17) User-Agent: Mutt/1.5.18 (2008-05-17) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 20620 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: aurelien@aurel32.net Precedence: bulk X-list: linux-mips This patch adds support for the reset button of WGT634U machine, using GPIO interrupts. Based on a patch from Michel Lespinasse. Signed-off-by: Aurelien Jarno --- arch/mips/bcm47xx/wgt634u.c | 37 +++++++++++++++++++++++++++++++++++++ 1 files changed, 37 insertions(+), 0 deletions(-) diff --git a/arch/mips/bcm47xx/wgt634u.c b/arch/mips/bcm47xx/wgt634u.c index f9e309a..db1a72f 100644 --- a/arch/mips/bcm47xx/wgt634u.c +++ b/arch/mips/bcm47xx/wgt634u.c @@ -11,6 +11,9 @@ #include #include #include +#include +#include +#include #include /* GPIO definitions for the WGT634U */ @@ -99,6 +102,30 @@ static struct platform_device *wgt634u_devices[] __initdata = { &wgt634u_gpio_leds, }; +static irqreturn_t gpio_interrupt(int irq, void *ignored) +{ + int state; + + /* Interrupts are shared, check if the current one is + a GPIO interrupt. */ + if (!ssb_chipco_irq_status(&ssb_bcm47xx.chipco, + SSB_CHIPCO_IRQ_GPIO)) + return IRQ_NONE; + + state = gpio_get_value(WGT634U_GPIO_RESET); + + /* Interrupt are level triggered, revert the interrupt polarity + to clear the interrupt. */ + gpio_polarity(WGT634U_GPIO_RESET, state); + + if (!state) { + printk(KERN_INFO "Reset button pressed"); + ctrl_alt_del(); + } + + return IRQ_HANDLED; +} + static int __init wgt634u_init(void) { /* There is no easy way to detect that we are running on a WGT634U @@ -115,6 +142,16 @@ static int __init wgt634u_init(void) printk(KERN_INFO "WGT634U machine detected.\n"); + if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET), + gpio_interrupt, IRQF_SHARED, + "WGT634U GPIO", &ssb_bcm47xx.chipco)) { + gpio_direction_input(WGT634U_GPIO_RESET); + gpio_intmask(WGT634U_GPIO_RESET, 1); + ssb_chipco_irq_mask(&ssb_bcm47xx.chipco, + SSB_CHIPCO_IRQ_GPIO, + SSB_CHIPCO_IRQ_GPIO); + } + wgt634u_flash_data.width = mcore->flash_buswidth; wgt634u_flash_resource.start = mcore->flash_window; wgt634u_flash_resource.end = mcore->flash_window -- 1.5.6.5 -- .''`. Aurelien Jarno | GPG: 1024D/F1BCDB73 : :' : Debian developer | Electrical Engineer `. `' aurel32@debian.org | aurelien@aurel32.net `- people.debian.org/~aurel32 | www.aurel32.net