From patchwork Wed Oct 9 17:14:43 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: 11181715 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 36F581864 for ; Wed, 9 Oct 2019 17:15:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1825B21920 for ; Wed, 9 Oct 2019 17:15:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dvNbFRqL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731940AbfJIRP1 (ORCPT ); Wed, 9 Oct 2019 13:15:27 -0400 Received: from mail-yw1-f68.google.com ([209.85.161.68]:44004 "EHLO mail-yw1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731929AbfJIRPZ (ORCPT ); Wed, 9 Oct 2019 13:15:25 -0400 Received: by mail-yw1-f68.google.com with SMTP id q7so1080930ywe.10; Wed, 09 Oct 2019 10:15:23 -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=WN3x14SIuSn1oRkzpsuHsfcKOnsb1pBJ4mBFw0scg+8=; b=dvNbFRqLAi9lvv9lXIMaJOvvvWBa5C5RlIVqFEKv+e6mYUisXjhoWsmYrngg9AdjEa t+m5wwkM30UN9DADwJSm/fjt3TmMbLmorqz3TvHJck4u9JusyAcHTvRqf1GRp8KuLDbT XaWvIhbTgXQHo1rmyaQWYkkrmYf2DLEhxAvTttpHCmg3cYjrrqatmIyRBBfEa3ApYk1m wDgy940b9VY5EpeqjH6vPeiu8cj5vMTFHPbssM47n/mG5IGOpeAeXgacLX5jYnNpDmXB O/XlTaju60CPUcoHOdQx4UaVp9nK0BBspjUk5wnREkGaI0+oG6LaSqvRJP6JRQp3iLot 0EnQ== 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=WN3x14SIuSn1oRkzpsuHsfcKOnsb1pBJ4mBFw0scg+8=; b=bF/oGzMcyzSZwHgY8/QWTKgHfJjmTF4xOZHTCJtbI2V/kaqN9zE9COGpneW4F3O3Id L2jqbf2NiaSDAXuFG1k2Y+mUvxVt4YqqDO87loiRLaYdfWtDswEQBoxBpCjo9VBfORNH a/0+zyNsAgbl9K3SrsQ2CBqGP9ctpSaftmogMuGnkvQo4NoIr+YGUxaoW5PAUIY+ULZ6 7DTm0GVXaYeMOfFCVkYV8l3L7mydeleTZcMqpAAPlUsCtmZcGvtxzlCL5hZQkM1jmUAj 44h5xDUjWF6IqDDDW8fralzZ4w+fwxMRYeSO3DcytYfGIxZEJu6rBfDelPX2li5qqQJP wcew== X-Gm-Message-State: APjAAAWxhwo3dMmN9og3FxGPpqfqX1YGx7kbeuy7rGUait3joR4gaU/a 87B0o6v0O09yEi1HWd4Sr14= X-Google-Smtp-Source: APXvYqzqVgftizykNOQgQim1E/5W+bQhxk52uFNwSRzjwBHsmHYHJF/LV3cpsFDZ4yLvRos6S1+bcw== X-Received: by 2002:a81:4b09:: with SMTP id y9mr3679069ywa.19.1570641323101; Wed, 09 Oct 2019 10:15:23 -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.36.2019.10.09.10.15.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2019 10:15:22 -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 Subject: [PATCH v18 07/14] gpio: pci-idio-16: Utilize for_each_set_clump8 macro Date: Wed, 9 Oct 2019 13:14:43 -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/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-pci-idio-16.c | 75 ++++++++++++--------------------- 1 file changed, 27 insertions(+), 48 deletions(-) diff --git a/drivers/gpio/gpio-pci-idio-16.c b/drivers/gpio/gpio-pci-idio-16.c index 5aa136a6a3e0..6c117e57078c 100644 --- a/drivers/gpio/gpio-pci-idio-16.c +++ b/drivers/gpio/gpio-pci-idio-16.c @@ -100,45 +100,23 @@ static int idio_16_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); - size_t i; - 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 port_state; + unsigned long offset; + unsigned long gpio_mask; void __iomem *ports[] = { &idio16gpio->reg->out0_7, &idio16gpio->reg->out8_15, &idio16gpio->reg->in0_7, &idio16gpio->reg->in8_15, }; + void __iomem *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; - } + for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) { + port_addr = ports[offset / 8]; + port_state = ioread8(port_addr) & gpio_mask; - /* read bits from current gpio port */ - port_state = ioread8(ports[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; @@ -178,30 +156,31 @@ static void idio_16_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip); + unsigned long offset; + unsigned long gpio_mask; + void __iomem *ports[] = { + &idio16gpio->reg->out0_7, &idio16gpio->reg->out8_15, + }; + size_t index; + void __iomem *port_addr; + unsigned long bitmask; unsigned long flags; - unsigned int out_state; + unsigned long out_state; - raw_spin_lock_irqsave(&idio16gpio->lock, flags); + for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) { + index = offset / 8; + port_addr = ports[index]; - /* process output lines 0-7 */ - if (*mask & 0xFF) { - out_state = ioread8(&idio16gpio->reg->out0_7) & ~*mask; - out_state |= *mask & *bits; - iowrite8(out_state, &idio16gpio->reg->out0_7); - } + bitmask = bitmap_get_value8(bits, offset) & gpio_mask; + + raw_spin_lock_irqsave(&idio16gpio->lock, flags); - /* shift to next output line word */ - *mask >>= 8; + out_state = ioread8(port_addr) & ~gpio_mask; + out_state |= bitmask; + iowrite8(out_state, port_addr); - /* process output lines 8-15 */ - if (*mask & 0xFF) { - *bits >>= 8; - out_state = ioread8(&idio16gpio->reg->out8_15) & ~*mask; - out_state |= *mask & *bits; - iowrite8(out_state, &idio16gpio->reg->out8_15); + raw_spin_unlock_irqrestore(&idio16gpio->lock, flags); } - - raw_spin_unlock_irqrestore(&idio16gpio->lock, flags); } static void idio_16_irq_ack(struct irq_data *data)