From patchwork Fri Aug 10 13:01:58 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Christophe PLAGNIOL-VILLARD X-Patchwork-Id: 1305391 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id AB989DF266 for ; Fri, 10 Aug 2012 13:06:51 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SzorH-0005Oh-TV; Fri, 10 Aug 2012 13:02:31 +0000 Received: from 10.mo4.mail-out.ovh.net ([188.165.33.109] helo=mo4.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Szoqu-0005Hm-BJ for linux-arm-kernel@lists.infradead.org; Fri, 10 Aug 2012 13:02:12 +0000 Received: from mail628.ha.ovh.net (b7.ovh.net [213.186.33.57]) by mo4.mail-out.ovh.net (Postfix) with SMTP id 76E16104FA66 for ; Fri, 10 Aug 2012 15:06:39 +0200 (CEST) Received: from b0.ovh.net (HELO queueout) (213.186.33.50) by b0.ovh.net with SMTP; 10 Aug 2012 15:02:17 +0200 Received: from ns32433.ovh.net (HELO localhost) (plagnioj%jcrosoft.com@213.251.161.87) by ns0.ovh.net with SMTP; 10 Aug 2012 15:02:15 +0200 From: Jean-Christophe PLAGNIOL-VILLARD To: linux-arm-kernel@lists.infradead.org X-Ovh-Mailout: 178.32.228.4 (mo4.mail-out.ovh.net) Subject: [PATCH 01/14] ARM: at91: gpio: implement request and free Date: Fri, 10 Aug 2012 15:01:58 +0200 Message-Id: <1344603731-32667-1-git-send-email-plagnioj@jcrosoft.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <20120810124820.GA20557@game.jcrosoft.org> References: <20120810124820.GA20557@game.jcrosoft.org> X-Ovh-Tracer-Id: 456833888024570877 X-Ovh-Remote: 213.251.161.87 (ns32433.ovh.net) X-Ovh-Local: 213.186.33.20 (ns0.ovh.net) X-OVH-SPAMSTATE: OK X-OVH-SPAMSCORE: -100 X-OVH-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeegledrudejucetufdoteggodetrfcurfhrohhfihhlvgemucfqggfjnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfhrhhomheplfgvrghnqdevhhhrihhsthhophhhvgcurffntefipffkqffnqdggkffnnfettfffuceophhlrghgnhhiohhjsehjtghrohhsohhfthdrtghomheqnecujfgurhephffvufffkffojghfsedttdertdertddt X-Spam-Check: DONE|U 0.5/N X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeegledrudejucetufdoteggodetrfcurfhrohhfihhlvgemucfqggfjnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfhrhhomheplfgvrghnqdevhhhrihhsthhophhhvgcurffntefipffkqffnqdggkffnnfettfffuceophhlrghgnhhiohhjsehjtghrohhsohhfthdrtghomheqnecujfgurhephffvufffkffojghfsedttdertdertddt X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [188.165.33.109 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Nicolas Ferre , Linus Walleij , Jean-Christophe PLAGNIOL-VILLARD X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Configure a gpio as input when freeing it to reduce power consumption/ Confire the pin as pio when requested. This is need by DT as we do not mux them any more. Cc: Linus Walleij Cc: Nicolas Ferre Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD Acked-by: Linus Walleij --- arch/arm/mach-at91/gpio.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c index be42cf0..3770d72 100644 --- a/arch/arm/mach-at91/gpio.c +++ b/arch/arm/mach-at91/gpio.c @@ -46,6 +46,8 @@ struct at91_gpio_chip { #define to_at91_gpio_chip(c) container_of(c, struct at91_gpio_chip, chip) +static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset); +static void at91_gpiolib_free(struct gpio_chip *chip, unsigned offset); static void at91_gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip); static void at91_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val); static int at91_gpiolib_get(struct gpio_chip *chip, unsigned offset); @@ -59,6 +61,8 @@ static int at91_gpiolib_to_irq(struct gpio_chip *chip, unsigned offset); { \ .chip = { \ .label = name, \ + .request = at91_gpiolib_request, \ + .free = at91_gpiolib_free, \ .direction_input = at91_gpiolib_direction_input, \ .direction_output = at91_gpiolib_direction_output, \ .get = at91_gpiolib_get, \ @@ -862,6 +866,21 @@ void __init at91_gpio_irq_setup(void) } /* gpiolib support */ +static void at91_gpiolib_free(struct gpio_chip *chip, unsigned offset) +{ + at91_gpiolib_direction_input(chip, offset); +} + +static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset) +{ + struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip); + void __iomem *pio = at91_gpio->regbase; + unsigned mask = 1 << offset; + + __raw_writel(mask, pio + PIO_PER); + return 0; +} + static int at91_gpiolib_direction_input(struct gpio_chip *chip, unsigned offset) {