From patchwork Sat Oct 5 18:37:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Breathitt Gray X-Patchwork-Id: 11175811 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 84074112B for ; Sat, 5 Oct 2019 18:39:10 +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 0DCA7222CA for ; Sat, 5 Oct 2019 18:39:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ozqgigU9"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BLPM5AZY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0DCA7222CA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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:References:In-Reply-To: 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: List-Owner; bh=vzrH1Wukg86DTGyaE/rGE63KSLok+XZk/81tne5JlbI=; b=ozqgigU9auZeok V6yJTf/m7gz7CHM43033xKgR4oXPuJYBVbrfmZPW6au9VXlkyFa9wnlAelEnQOKuMhiuLI5L4pWL+ kUXRRfTqqJ+fr5jepAP4Ob4jK4FD6mxsGOIIWGm4vZN/xUzsdWG5PLk7A9kGwxDl8J531M6TcjREJ fHyiyULTkY+sxI/vG1rKQP40zRRx6GBfip+ETWHl91Xg7HD90I5urwueuYzql94m+DmPACASOSeIi qSX4n2ZoOdKjdTqDeODWBGPAGwbZh+teZMBbh589XBixEtO0Fg6knWRWdoKKoGbCKOtpzQQwCnXw/ yrgVGCzmnj0piLeyz6SQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGoxP-0003vw-2C; Sat, 05 Oct 2019 18:39:07 +0000 Received: from mail-yb1-xb43.google.com ([2607:f8b0:4864:20::b43]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGovw-0002Vl-9r for linux-arm-kernel@lists.infradead.org; Sat, 05 Oct 2019 18:37:38 +0000 Received: by mail-yb1-xb43.google.com with SMTP id w141so2711154ybe.0 for ; Sat, 05 Oct 2019 11:37:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=o+Nx0iwa/JWg8XzaLOzCUa+40QRks91uKc0Q4Z5/tUQ=; b=BLPM5AZYaQjtW+HCtWL1mw1Q1RfIUdkHM80ObMFyZXmWhyrMIFVmmBtPx1unI+UznM i28diS295l6wVOJlTMVRpQcTpVB12Y26oMmk7+KSvB5FjbShhaqOq4n1Cy+qt2PGia77 NSrDnNR4C5tnIGhHO5d6Ld7ykV0mhK358HAgjZM0NK1QTMeY4vNJfRp/ea69Q2rM2mPF Y+t8lj8KpVuiz8q458MnX86Z1NGIq4hem9KzAlEF3a6YlKGtoF15bN3tzCEGjQJta574 w9KmD5oQzzBW9cxzDmKLJiCVFIx2M/zZ51nQcIbII9rC16tORtJM3KQuzfXoI5hGAbUi a9uQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=o+Nx0iwa/JWg8XzaLOzCUa+40QRks91uKc0Q4Z5/tUQ=; b=DeUnDCIg6e3hweS9wSxEfA+6Rki1j5F51kD+owsYkxmYBWwEo2NS7ZO/jbQ3wYFhnI ah1vUKZO+zUW6j6a9lun7o1g1R926wphQZoJKeJ/dvAJs3j9CWFvW5GqA/de7YGa89b4 Jrn6I9zlKvtV/uDCn68R1kgHgTN7YdxkCP9Re14g05U2Xcrp6f2IW8qhwr7KJi4Yz/NY rViDzWAhJr4AqHgd9VJbzl6Um1Z8kQY8pTBR+/n+qtwNSqfHuAkWZjEBR8aasZ4yV9Zb xa4UXARXNF9pP7kujfgJb13aRLoiTT0SuMcCfQzeCKyzdgW475rYVQf6B8GcrxX1alA5 9BVw== X-Gm-Message-State: APjAAAXJV9Q49b/PiKXfYCPMCszbKwNwjuVIe+EOPvd8gck7AxGeMhCP NyJzWp/V60qMzdENzYxflXI= X-Google-Smtp-Source: APXvYqxvqy/r0pTh73zic7WR1hwqT8GY5/qw5Z8U0InFSM8O+GbZCp2Lv+bVatLNMly5Gdd1L3avXA== X-Received: by 2002:a25:a0ce:: with SMTP id i14mr1884418ybm.14.1570300655106; Sat, 05 Oct 2019 11:37:35 -0700 (PDT) Received: from localhost.localdomain (072-189-084-142.res.spectrum.com. [72.189.84.142]) by smtp.gmail.com with ESMTPSA id g128sm2376654ywb.13.2019.10.05.11.37.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Oct 2019 11:37:34 -0700 (PDT) From: William Breathitt Gray To: linus.walleij@linaro.org, bgolaszewski@baylibre.com Subject: [PATCH v15 06/14] gpio: ws16c48: Utilize for_each_set_clump8 macro Date: Sat, 5 Oct 2019 14:37:00 -0400 Message-Id: X-Mailer: git-send-email 2.23.0 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191005_113736_358908_988AAE13 X-CRM114-Status: GOOD ( 14.08 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:b43 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (vilhelm.gray[at]gmail.com) -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid 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: linux-arch@vger.kernel.org, preid@electromag.com.au, William Breathitt Gray , yamada.masahiro@socionext.com, linux-pm@vger.kernel.org, linux@rasmusvillemoes.dk, linux-kernel@vger.kernel.org, morten.tiljeset@prevas.dk, sean.nyekjaer@prevas.dk, linux-gpio@vger.kernel.org, lukas@wunner.de, geert@linux-m68k.org, akpm@linux-foundation.org, andriy.shevchenko@linux.intel.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Replace verbose implementation in get_multiple/set_multiple callbacks with for_each_set_clump8 macro to simplify code and improve clarity. Reviewed-by: Linus Walleij Signed-off-by: William Breathitt Gray --- drivers/gpio/gpio-ws16c48.c | 73 ++++++++++--------------------------- 1 file changed, 20 insertions(+), 53 deletions(-) diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c index e0ef66b6a237..51aaa5c17fce 100644 --- a/drivers/gpio/gpio-ws16c48.c +++ b/drivers/gpio/gpio-ws16c48.c @@ -126,42 +126,19 @@ static int ws16c48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(chip); - const unsigned int gpio_reg_size = 8; - size_t i; - const size_t num_ports = chip->ngpio / gpio_reg_size; - unsigned int bits_offset; - size_t word_index; - unsigned int word_offset; - unsigned long word_mask; - const unsigned long port_mask = GENMASK(gpio_reg_size - 1, 0); + unsigned long offset; + unsigned long gpio_mask; + unsigned int port_addr; unsigned long port_state; /* clear bits array to a clean slate */ bitmap_zero(bits, chip->ngpio); - /* get bits are evaluated a gpio port register at a time */ - for (i = 0; i < num_ports; i++) { - /* gpio offset in bits array */ - bits_offset = i * gpio_reg_size; + for_each_set_clump8(offset, gpio_mask, mask, chip->ngpio) { + port_addr = ws16c48gpio->base + offset / 8; + port_state = inb(port_addr) & gpio_mask; - /* word index for bits array */ - word_index = BIT_WORD(bits_offset); - - /* gpio offset within current word of bits array */ - word_offset = bits_offset % BITS_PER_LONG; - - /* mask of get bits for current gpio within current word */ - word_mask = mask[word_index] & (port_mask << word_offset); - if (!word_mask) { - /* no get bits in this port so skip to next one */ - continue; - } - - /* read bits from current gpio port */ - port_state = inb(ws16c48gpio->base + i); - - /* store acquired bits at respective bits array offset */ - bits[word_index] |= (port_state << word_offset) & word_mask; + bitmap_set_value8(bits, port_state, offset); } return 0; @@ -195,39 +172,29 @@ static void ws16c48_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(chip); - unsigned int i; - const unsigned int gpio_reg_size = 8; - unsigned int port; - unsigned int iomask; - unsigned int bitmask; + unsigned long offset; + unsigned long gpio_mask; + size_t index; + unsigned int port_addr; + unsigned long bitmask; unsigned long flags; - /* set bits are evaluated a gpio register size at a time */ - for (i = 0; i < chip->ngpio; i += gpio_reg_size) { - /* no more set bits in this mask word; skip to the next word */ - if (!mask[BIT_WORD(i)]) { - i = (BIT_WORD(i) + 1) * BITS_PER_LONG - gpio_reg_size; - continue; - } - - port = i / gpio_reg_size; + for_each_set_clump8(offset, gpio_mask, mask, chip->ngpio) { + index = offset / 8; + port_addr = ws16c48gpio->base + index; /* mask out GPIO configured for input */ - iomask = mask[BIT_WORD(i)] & ~ws16c48gpio->io_state[port]; - bitmask = iomask & bits[BIT_WORD(i)]; + gpio_mask &= ~ws16c48gpio->io_state[index]; + bitmask = bitmap_get_value8(bits, offset) & gpio_mask; raw_spin_lock_irqsave(&ws16c48gpio->lock, flags); /* update output state data and set device gpio register */ - ws16c48gpio->out_state[port] &= ~iomask; - ws16c48gpio->out_state[port] |= bitmask; - outb(ws16c48gpio->out_state[port], ws16c48gpio->base + port); + ws16c48gpio->out_state[index] &= ~gpio_mask; + ws16c48gpio->out_state[index] |= bitmask; + outb(ws16c48gpio->out_state[index], port_addr); raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags); - - /* prepare for next gpio register set */ - mask[BIT_WORD(i)] >>= gpio_reg_size; - bits[BIT_WORD(i)] >>= gpio_reg_size; } }