From patchwork Wed Oct 9 17:14:49 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: 11181721 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 4102C1575 for ; Wed, 9 Oct 2019 17:15:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 21505206BB for ; Wed, 9 Oct 2019 17:15:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PGJQlbBD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731987AbfJIRPe (ORCPT ); Wed, 9 Oct 2019 13:15:34 -0400 Received: from mail-yw1-f65.google.com ([209.85.161.65]:44499 "EHLO mail-yw1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731978AbfJIRPd (ORCPT ); Wed, 9 Oct 2019 13:15:33 -0400 Received: by mail-yw1-f65.google.com with SMTP id m13so1076089ywa.11; Wed, 09 Oct 2019 10:15:33 -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=PGJQlbBDuENA6RKdMPrsxNZh6nst1zCDQfAK+p2cso3insZOWY8FJEwOLv8XenLtXO bGBQwd34unyuouDzIG7HmrZIvPHnyWr41NSFvJAL/xOS82fgD1NfhseCwhfw2DikqEu5 eVmbp/Vn7KgewV0075KN8zTpeX7qMQSNUokumcZaEeZsJG5VO/PfXYDcOLC9JCZ890KW y0sQAJpfgG+FsGKD3Iys1Y+e55c+N8gknc5iUoa49tq8VWF2un0vL+D3LELYFnV+GDFv gzgYMpXOTFDKPjhHGuCRvpkZSc1A0imSUuHlDqkMGLTgqTAaC53i29PN+CEA9l1XwD0+ tT4A== 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=ilEmj9c+yWGjLBz4zNmfUn7fJy5PhUcZFbCxXzk5qx1ZSrKwnFAJq9tfrjQHruGs1H l9EcyIXPbjVS3yX0uQJszWHKh+nrAoDtzWr7VaGpDLAvK73gHYXV+WKR9DyTDYmvBdHd hBccHxzIL+RqbNuC+jM2CVfduw0ua9EnZ2Uj0tZkSOTq9T6XW6ibQmctTrZ+09Y5EyTk r/WqjvQU8gl3V9oEDdMV4cqLj3K67A24Obp4jPOBV20IpPati6DqMIol8vSSd9C7a+6y wzrqsfSExOp1gZKXteoQmDfn4OBSmog/F3WOAS6ZVrRG0RjxK1qYdKWx23B4yeYPCN2Z UDog== X-Gm-Message-State: APjAAAVhQ24qf9KJAqPXNsw3hrhdB/ljou5sg1Gucjij8twIE0UOvOLC k2NFwbft4uFxq63IBYZUiLk= X-Google-Smtp-Source: APXvYqxPf397BWAZAXQxl/ej3ydag60BplqntuCWiFdPKrkxGZDZCFC0ugMw5RZO4Kunw4jd93LwwA== X-Received: by 2002:a0d:d042:: with SMTP id s63mr3399648ywd.356.1570641332590; Wed, 09 Oct 2019 10:15:32 -0700 (PDT) Received: from localhost.localdomain (072-189-084-142.res.spectrum.com. [72.189.84.142]) by smtp.gmail.com with ESMTPSA id r63sm743292ywg.36.2019.10.09.10.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2019 10:15:31 -0700 (PDT) From: William Breathitt Gray To: linus.walleij@linaro.org, bgolaszewski@baylibre.com, akpm@linux-foundation.org Cc: 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, William Breathitt Gray , Mathias Duckeck Subject: [PATCH v18 13/14] gpio: max3191x: Utilize the for_each_set_clump8 macro Date: Wed, 9 Oct 2019 13:14:49 -0400 Message-Id: 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: