From patchwork Sun Oct 6 15:11:10 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: 11176363 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 8F36A76 for ; Sun, 6 Oct 2019 15:12:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D87E21A49 for ; Sun, 6 Oct 2019 15:12:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HdegEL2f" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726872AbfJFPLw (ORCPT ); Sun, 6 Oct 2019 11:11:52 -0400 Received: from mail-yw1-f67.google.com ([209.85.161.67]:41908 "EHLO mail-yw1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726852AbfJFPLw (ORCPT ); Sun, 6 Oct 2019 11:11:52 -0400 Received: by mail-yw1-f67.google.com with SMTP id 129so4167408ywb.8; Sun, 06 Oct 2019 08:11:51 -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=OQMsvrMqAN5cYMrSu91Pu66B0Sg+HB0aWPXdvZz2KcA=; b=HdegEL2fpTV5hm7hUSkkzZ4H15/08rNMz0M2X1pafGXHTQhJLsKPHNgwbtw6c6lfg1 SMO5McnqQP8Ykh3+jU8j9FjTNMKFttnbpN+/DgyhxRLu8di7tag1tcKKHnjrauFAZ1/a RgF5TX87i7ZmA8M2LsMwM6qDAp541QBZSnpjTi+o4XszUJDLj5+nMjvMGLtqEqfebny8 3myOdCVECCqS6vzRlbl/QMtqj0gaooDXwjQOUhZhtP5+8nxHlWw5JrwZgIsHTCwTqm4s sMDxDPdORADs9WMTq9N8pDqXpwvAZ8vSUCTDWrQQBMoI1v3HYoMWj5ACxbSPCGOnDOjq EBWw== 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=OQMsvrMqAN5cYMrSu91Pu66B0Sg+HB0aWPXdvZz2KcA=; b=Ff4kUs3y1pcxtio3/ALKK6rWvyhPd9AZ/aeXeJsPtf735QftsjVV6KCOUt2gjy6ZPw 9cghqg5Btja/TRl3XSq+m9dfeB/Ai8sEe+XyfZMEXtP75HzWY7iULLNYyhhZR1pki1rh jxZAWSZPcW5ywCR37UIrmCyqJGefTra6Ytjl7xvXLNMfHFA17cBonvltgd3UXkglyH66 5z+BhhylBnO+xTaRyrROMnHCf+8xXSf+mZmZCSwCfVx2T1OSYcpJD+xNofrHDc8NBaiu +Zbwhrz13AwwQ2saaT2GOvKvKDd0D66zRunTg5HXGQsqrNVHh+nS/rnW3A3g+7h/jIQd qUDg== X-Gm-Message-State: APjAAAXjZRi5+BNaGW72nfJy2HJ4YifdY+DfwH0Wz98bRQGT/iy+tw6G KdNvTCIO9KLhKfl+F7S7xFY= X-Google-Smtp-Source: APXvYqxfMNyInhJxsFvLfYNQNh5jJ/+1V+3JSPgN+LhsqCDG6NcJucB+B2+9PrG0NdChfsJ9jp4jIA== X-Received: by 2002:a0d:df83:: with SMTP id i125mr15974641ywe.260.1570374711014; Sun, 06 Oct 2019 08:11:51 -0700 (PDT) Received: from localhost.localdomain (072-189-084-142.res.spectrum.com. [72.189.84.142]) by smtp.gmail.com with ESMTPSA id e82sm2662434ywc.43.2019.10.06.08.11.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Oct 2019 08:11:50 -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-kernel@vger.kernel.org, linux-arch@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, sean.nyekjaer@prevas.dk, morten.tiljeset@prevas.dk, William Breathitt Gray , Mathias Duckeck Subject: [PATCH v16 13/14] gpio: max3191x: Utilize the for_each_set_clump8 macro Date: Sun, 6 Oct 2019 11:11:10 -0400 Message-Id: <821e44729c9e561899b9c746b29bcdf56201aca9.1570374078.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.23.0 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 Replace verbose implementation in get_multiple callback with for_each_set_clump8 macro to simplify code and improve clarity. Cc: Mathias Duckeck Cc: Lukas Wunner Signed-off-by: William Breathitt Gray --- drivers/gpio/gpio-max3191x.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/gpio/gpio-max3191x.c b/drivers/gpio/gpio-max3191x.c index 4b4b2ceb82fc..0242c6187bf5 100644 --- a/drivers/gpio/gpio-max3191x.c +++ b/drivers/gpio/gpio-max3191x.c @@ -31,6 +31,7 @@ */ #include +#include #include #include #include @@ -232,16 +233,20 @@ static int max3191x_get_multiple(struct gpio_chip *gpio, unsigned long *mask, unsigned long *bits) { struct max3191x_chip *max3191x = gpiochip_get_data(gpio); - int ret, bit = 0, wordlen = max3191x_wordlen(max3191x); + const unsigned int wordlen = max3191x_wordlen(max3191x); + int ret; + unsigned long bit; + unsigned long gpio_mask; + unsigned long in; mutex_lock(&max3191x->lock); ret = max3191x_readout_locked(max3191x); if (ret) goto out_unlock; - while ((bit = find_next_bit(mask, gpio->ngpio, bit)) != gpio->ngpio) { + bitmap_zero(bits, gpio->ngpio); + for_each_set_clump8(bit, gpio_mask, mask, gpio->ngpio) { unsigned int chipnum = bit / MAX3191X_NGPIO; - unsigned long in, shift, index; if (max3191x_chip_is_faulting(max3191x, chipnum)) { ret = -EIO; @@ -249,12 +254,8 @@ static int max3191x_get_multiple(struct gpio_chip *gpio, unsigned long *mask, } in = ((u8 *)max3191x->xfer.rx_buf)[chipnum * wordlen]; - shift = round_down(bit % BITS_PER_LONG, MAX3191X_NGPIO); - index = bit / BITS_PER_LONG; - bits[index] &= ~(mask[index] & (0xff << shift)); - bits[index] |= mask[index] & (in << shift); /* copy bits */ - - bit = (chipnum + 1) * MAX3191X_NGPIO; /* go to next chip */ + in &= gpio_mask; + bitmap_set_value8(bits, in, bit); } out_unlock: