From patchwork Fri Mar 29 03:04:48 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: 10876243 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CECE91669 for ; Fri, 29 Mar 2019 03:03:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA07D290A5 for ; Fri, 29 Mar 2019 03:03:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AE5B2290A9; Fri, 29 Mar 2019 03:03:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 351FE290A5 for ; Fri, 29 Mar 2019 03:03:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728642AbfC2DDx (ORCPT ); Thu, 28 Mar 2019 23:03:53 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:40326 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728545AbfC2DDx (ORCPT ); Thu, 28 Mar 2019 23:03:53 -0400 Received: by mail-pl1-f196.google.com with SMTP id b11so302406plr.7; Thu, 28 Mar 2019 20:03:52 -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=D+VKB8odm/iRn7Qlf3NsRe6rs5PO9H8u0I72DJse46A=; b=uQNu9sC7c+om5e3vgk0flmjjZKWU3pJaB8T+WBl+D330fN+sPMPwNY1f965Td2Uat5 ChuA59TrLhkmRuPXmjktAcu6smGTPLng6l5ZmOh5kDIlDPrGMDknjaLKykXjybe816fd +aLUY+3vmhwGbj2fiN8znPltSgkFxUgFp3RKElcaDsg+6flrAaqw1XrX3QT/j+KGI7NK XteKOU1FxjDecX+j6ODvbal/rBKJLfv05ZMA1JxslyGNDN9TYEYvtqQ/cp0ukvcnP/Nq 6epaWASlegYukExRuYw7ItPwk3AQT15OHn5psCD0fW/SPZvnBUYtfo1DMGZ1RiBSCIMU Rf5Q== 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=D+VKB8odm/iRn7Qlf3NsRe6rs5PO9H8u0I72DJse46A=; b=Fv8ZzY2xLxd0VDWd3sFikj15GvHFsQrXCGkTuGHTmZnBPtKxER526IzI+kq2o84p0j EjCEGpDaviwpk88OuLDwiGrPsNXk3J8BjJEnXh+kOmP6m1pJta3YVWUB0hVlFkDbeRZD LpnF943cQ/KazqJ5FAffF8Et2ubALrSuoAr1Pg9kC5pR0fiZlFPiOtmEeAIOzf27Ixa3 cLwzqiK83Ps5m8X+48OE0o8+jcRbleVFAlsnKi3EGp62qg2dtBVAoIBfMR83UYlry6rl 0X/qBFmgDDso05obSBKSpLv0+m91q0Ed5xbGkqiADallVJktBme0cOfAnmHmROduFyxr XJWw== X-Gm-Message-State: APjAAAUnMC9ElW2ayGo2orQGwCa0Jr8HxwCsyxJsxvSlsdXKhT1ycX4J 4zjVStHsLKjMvtJ7NTbzLPY= X-Google-Smtp-Source: APXvYqzQxn36O5ObsJGBGNKD6tiCbowYgmszf87eZW9UoikvPwKFjdTDbqUWXRPNs9BctnBL1lh7yA== X-Received: by 2002:a17:902:26f:: with SMTP id 102mr45575694plc.175.1553828632290; Thu, 28 Mar 2019 20:03:52 -0700 (PDT) Received: from localhost.localdomain ([2001:268:c0a5:ba2:c70:4af9:86e2:2]) by smtp.gmail.com with ESMTPSA id e13sm648881pgb.37.2019.03.28.20.03.45 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 28 Mar 2019 20:03:51 -0700 (PDT) From: William Breathitt Gray To: linus.walleij@linaro.org, bgolaszewski@baylibre.com Cc: akpm@linux-foundation.org, linux-gpio@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, yamada.masahiro@socionext.com, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, geert@linux-m68k.org, preid@electromag.com.au, lukas@wunner.de, William Breathitt Gray Subject: [PATCH v14 03/11] gpio: 104-dio-48e: Utilize for_each_set_clump8 macro Date: Fri, 29 Mar 2019 12:04:48 +0900 Message-Id: X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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-104-dio-48e.c | 73 ++++++++++----------------------- 1 file changed, 21 insertions(+), 52 deletions(-) diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c index 92c8f944bf64..2fc6d2b11d25 100644 --- a/drivers/gpio/gpio-104-dio-48e.c +++ b/drivers/gpio/gpio-104-dio-48e.c @@ -183,46 +183,25 @@ static int dio48e_gpio_get(struct gpio_chip *chip, unsigned offset) return !!(port_state & mask); } +static const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; + static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip); - size_t i; - static const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; - const unsigned int gpio_reg_size = 8; - 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 < ARRAY_SIZE(ports); i++) { - /* gpio offset in bits array */ - bits_offset = i * gpio_reg_size; - - /* 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(dio48egpio->base + ports[i]); + for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) { + port_addr = dio48egpio->base + ports[offset / 8]; + port_state = inb(port_addr) & gpio_mask; - /* 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; @@ -252,37 +231,27 @@ static void dio48e_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip); - unsigned int i; - const unsigned int gpio_reg_size = 8; - unsigned int port; - unsigned int out_port; - 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; - } + for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) { + index = offset / 8; + port_addr = dio48egpio->base + ports[index]; - port = i / gpio_reg_size; - out_port = (port > 2) ? port + 1 : port; - bitmask = mask[BIT_WORD(i)] & bits[BIT_WORD(i)]; + bitmask = bitmap_get_value8(bits, offset) & gpio_mask; raw_spin_lock_irqsave(&dio48egpio->lock, flags); /* update output state data and set device gpio register */ - dio48egpio->out_state[port] &= ~mask[BIT_WORD(i)]; - dio48egpio->out_state[port] |= bitmask; - outb(dio48egpio->out_state[port], dio48egpio->base + out_port); + dio48egpio->out_state[index] &= ~gpio_mask; + dio48egpio->out_state[index] |= bitmask; + outb(dio48egpio->out_state[index], port_addr); raw_spin_unlock_irqrestore(&dio48egpio->lock, flags); - - /* prepare for next gpio register set */ - mask[BIT_WORD(i)] >>= gpio_reg_size; - bits[BIT_WORD(i)] >>= gpio_reg_size; } }