From patchwork Mon Mar 25 06:24:06 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: 10867977 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 A185E13B5 for ; Mon, 25 Mar 2019 06:23:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 90F6B29206 for ; Mon, 25 Mar 2019 06:23:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 84299291FA; Mon, 25 Mar 2019 06:23:14 +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 06DFB291F2 for ; Mon, 25 Mar 2019 06:23:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729710AbfCYGXN (ORCPT ); Mon, 25 Mar 2019 02:23:13 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:41704 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729587AbfCYGXN (ORCPT ); Mon, 25 Mar 2019 02:23:13 -0400 Received: by mail-pg1-f195.google.com with SMTP id f6so1619215pgs.8; Sun, 24 Mar 2019 23:23:12 -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=rgWDXyitkPfkOwvJZbjg9H8+KzeLJbUpGMI+NATW6JM=; b=IGDM1WXrWs00QprYpjPDFyUpmB34OuNPGF2aow50mUHQq6jonCNZIpq6ezMWAkOPLP zMSuapjbXeiBcey6Mr8Vp4Ltn22LVSceVltgjtgqurQ3kb/xMCVvl+NtpS41dOjVNOAF lXG6lOVi0EWO1BdzsTYnk391w8ZwnQIQXz1R8DFisoUVCgPgIN09WiMl6C/mxcEWkUYY nUt7gu660HsIZvvGOZeFwYXOJmu25cKXQMFt5Xsen2mKRYsvVmAbjS2Dshd4o1F6M7Jz meKz1GOLXkCbenDZI5tzwiAYiVw/E9gDxxy3LToKMPjHkzVlXtHa01jZFnsWNTM847al ofoQ== 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=rgWDXyitkPfkOwvJZbjg9H8+KzeLJbUpGMI+NATW6JM=; b=FJgAJeLL6yueqNrLHpqopMOhVBnKi2LaoX9fUMj4ih5aSlxkh1qCd/Z1T7taxkPPh9 lslRpE54qanobGNk5kEdVkGU7T0usfCqBKswa40936SYeFvca6arh0LMF/PeKMopXuR/ 3xu7+ujrf/hllHe9M/ZSm65Toap6lAVcnZA98hRzg36JSUlY25VqdGCAfEBSTadukBJV j7FY4ZKU/M4QOcqF1t3vSHB1tCHDyy8MWzBQLESOCYCiMVquLG+0+M+zwMmTPAU4cKfX Z1rZsvUdUZZYWpKDnPZSy+a3jfcDNXTxf68jOGAOTZE0ShMXOcD+P4uUSk7Y+4DymvXf 38wQ== X-Gm-Message-State: APjAAAUPM0ydjVubRCpavwQnagF//eilUA0YfHmkPy9RyqeU5HBhNBOj +cn3MQR5tJ7B6sd0jvK+ykA= X-Google-Smtp-Source: APXvYqyGTv/AJ8DiPXhGlVppglbyoTzXzesGeimDseTZmlJMyXSAFB03SgdphPnP5REhFTE3gqIsmg== X-Received: by 2002:a17:902:8609:: with SMTP id f9mr23721645plo.85.1553494991874; Sun, 24 Mar 2019 23:23:11 -0700 (PDT) Received: from localhost.localdomain ([2001:268:c0a5:e068:c70:4af9:86e2:2]) by smtp.gmail.com with ESMTPSA id l80sm5413802pfb.60.2019.03.24.23.23.05 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 24 Mar 2019 23:23:11 -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, William Breathitt Gray Subject: [PATCH v12 05/11] gpio: gpio-mm: Utilize for_each_set_clump8 macro Date: Mon, 25 Mar 2019 15:24:06 +0900 Message-Id: <49eb64a1bf665dd0dbdd1ba4ba25d8fdb4ff8000.1553494625.git.vilhelm.gray@gmail.com> 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-gpio-mm.c | 73 +++++++++++-------------------------- 1 file changed, 22 insertions(+), 51 deletions(-) diff --git a/drivers/gpio/gpio-gpio-mm.c b/drivers/gpio/gpio-gpio-mm.c index 8c150fd68d9d..4c1037a005ab 100644 --- a/drivers/gpio/gpio-gpio-mm.c +++ b/drivers/gpio/gpio-gpio-mm.c @@ -172,46 +172,26 @@ static int gpiomm_gpio_get(struct gpio_chip *chip, unsigned int offset) return !!(port_state & mask); } +static const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; + static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct gpiomm_gpio *const gpiommgpio = 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 int offset; + unsigned long gpio_mask; + const unsigned int ngpio = ARRAY_SIZE(ports) * 8; + 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(gpiommgpio->base + ports[i]); + for_each_set_clump8(offset, gpio_mask, mask, ngpio) { + port_addr = gpiommgpio->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, ngpio, port_state, offset); } return 0; @@ -242,37 +222,28 @@ static void gpiomm_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - unsigned int i; - const unsigned int gpio_reg_size = 8; - unsigned int port; - unsigned int out_port; + unsigned int offset; + unsigned long gpio_mask; + const unsigned int ngpio = ARRAY_SIZE(ports) * 8; + size_t index; + unsigned int port_addr; unsigned int 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, ngpio) { + index = offset / 8; + port_addr = gpiommgpio->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, ngpio, offset) & gpio_mask; spin_lock_irqsave(&gpiommgpio->lock, flags); /* update output state data and set device gpio register */ - gpiommgpio->out_state[port] &= ~mask[BIT_WORD(i)]; - gpiommgpio->out_state[port] |= bitmask; - outb(gpiommgpio->out_state[port], gpiommgpio->base + out_port); + gpiommgpio->out_state[index] &= ~gpio_mask; + gpiommgpio->out_state[index] |= bitmask; + outb(gpiommgpio->out_state[index], port_addr); spin_unlock_irqrestore(&gpiommgpio->lock, flags); - - /* prepare for next gpio register set */ - mask[BIT_WORD(i)] >>= gpio_reg_size; - bits[BIT_WORD(i)] >>= gpio_reg_size; } }