From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 50106C00306 for ; Thu, 5 Sep 2019 14:49:16 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7FA5F206CD for ; Thu, 5 Sep 2019 14:49:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="XVO8AvSP" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FA5F206CD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=T6YQ4IricH9SAkMvm3nau30FpWAQzUE8QJ2H71MdunI=; b=XVO8AvSPQqq7wR t5lhYHdoLiQ4BrRl6JIc1V6kMy200UFUgBrm7FfeWPWf2AIauE4EDVjZ+VsvJcoVbA2SXaZ06DJNg VYnVAiznpt5YSwDuh53uRQHd+Rog+40o4vw0t8ENu27jj23XiI9E8uVWEkJG76xp+liy7qHxZaR0h KIXc04dcow014JWLFb0VFw2VEUUyzRYE7TcE+qTGSPfiPpYo60Py3iluLifgEAmNJbTJWe74VBNKL 5QXGqN+wM9rjANdbz5sRJW59wuMV2q/PMBFH/8LvSBhDkIfFwDCSyApIZnqiaQ7axo1ZFI/q29mrn 2HnvnXzhyz1hWchAEIRA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i5t4R-0007fd-6b; Thu, 05 Sep 2019 14:49:11 +0000 Received: from relay7-d.mail.gandi.net ([217.70.183.200]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i5t4L-0007YA-Jo for linux-arm-kernel@lists.infradead.org; Thu, 05 Sep 2019 14:49:08 +0000 X-Originating-IP: 86.207.98.53 Received: from localhost (aclermont-ferrand-651-1-259-53.w86-207.abo.wanadoo.fr [86.207.98.53]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay7-d.mail.gandi.net (Postfix) with ESMTPSA id B1E0E2000B; Thu, 5 Sep 2019 14:48:57 +0000 (UTC) From: Alexandre Belloni To: Linus Walleij Subject: [PATCH v2] pinctrl: at91-pio4: implement .get_multiple and .set_multiple Date: Thu, 5 Sep 2019 16:48:49 +0200 Message-Id: <20190905144849.24882-1-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190905_074906_029657_67E97325 X-CRM114-Status: GOOD ( 10.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexandre Belloni , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Ludovic Desroches , Claudiu.Beznea@microchip.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Implement .get_multiple and .set_multiple to allow reading or setting multiple pins simultaneously. Pins in the same bank will all be switched at the same time, improving synchronization and performances. Signed-off-by: Alexandre Belloni --- Changes since v1 https://lore.kernel.org/lkml/20190905141304.22005-1-alexandre.belloni@bootlin.com/ : - Removed debug line drivers/pinctrl/pinctrl-at91-pio4.c | 58 +++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c index d6de4d360cd4..d281ec40e098 100644 --- a/drivers/pinctrl/pinctrl-at91-pio4.c +++ b/drivers/pinctrl/pinctrl-at91-pio4.c @@ -328,6 +328,33 @@ static int atmel_gpio_get(struct gpio_chip *chip, unsigned offset) return !!(reg & BIT(pin->line)); } +static int atmel_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, + unsigned long *bits) +{ + struct atmel_pioctrl *atmel_pioctrl = gpiochip_get_data(chip); + unsigned int bank; + + bitmap_zero(bits, atmel_pioctrl->npins); + + for (bank = 0; bank < atmel_pioctrl->nbanks; bank++) { + unsigned int word = bank; + unsigned int offset = 0; + unsigned int reg; + +#if ATMEL_PIO_NPINS_PER_BANK != BITS_PER_LONG + word = BIT_WORD(bank * ATMEL_PIO_NPINS_PER_BANK); + offset = bank * ATMEL_PIO_NPINS_PER_BANK % BITS_PER_LONG; +#endif + if (!mask[word]) + continue; + + reg = atmel_gpio_read(atmel_pioctrl, bank, ATMEL_PIO_PDSR); + bits[word] |= mask[word] & (reg << offset); + } + + return 0; +} + static int atmel_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { @@ -358,11 +385,42 @@ static void atmel_gpio_set(struct gpio_chip *chip, unsigned offset, int val) BIT(pin->line)); } +static void atmel_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, + unsigned long *bits) +{ + struct atmel_pioctrl *atmel_pioctrl = gpiochip_get_data(chip); + unsigned int bank; + + for (bank = 0; bank < atmel_pioctrl->nbanks; bank++) { + unsigned int bitmask; + unsigned int word = bank; + +#if ATMEL_PIO_NPINS_PER_BANK != BITS_PER_LONG + word = BIT_WORD(bank * ATMEL_PIO_NPINS_PER_BANK); +#endif + if (!mask[word]) + continue; + + bitmask = mask[word] & bits[word]; + atmel_gpio_write(atmel_pioctrl, bank, ATMEL_PIO_SODR, bitmask); + + bitmask = mask[word] & ~bits[word]; + atmel_gpio_write(atmel_pioctrl, bank, ATMEL_PIO_CODR, bitmask); + +#if ATMEL_PIO_NPINS_PER_BANK != BITS_PER_LONG + mask[word] >>= ATMEL_PIO_NPINS_PER_BANK; + bits[word] >>= ATMEL_PIO_NPINS_PER_BANK; +#endif + } +} + static struct gpio_chip atmel_gpio_chip = { .direction_input = atmel_gpio_direction_input, .get = atmel_gpio_get, + .get_multiple = atmel_gpio_get_multiple, .direction_output = atmel_gpio_direction_output, .set = atmel_gpio_set, + .set_multiple = atmel_gpio_set_multiple, .to_irq = atmel_gpio_to_irq, .base = 0, }; -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel