From nobody Sat Apr 11 12:25:16 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11AABC4332F for ; Sun, 6 Nov 2022 07:14:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229632AbiKFHOe (ORCPT ); Sun, 6 Nov 2022 02:14:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229505AbiKFHO3 (ORCPT ); Sun, 6 Nov 2022 02:14:29 -0500 Received: from mail-qt1-x836.google.com (mail-qt1-x836.google.com [IPv6:2607:f8b0:4864:20::836]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D786DE94 for ; Sun, 6 Nov 2022 00:14:26 -0700 (PDT) Received: by mail-qt1-x836.google.com with SMTP id l15so5467365qtv.4 for ; Sun, 06 Nov 2022 00:14:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=okHcJs2Cc2s2NGFd3cbIMzhnoKFHepCEh8VYgpHYEm0=; b=rxrXpSOFJPnPjTQuX3EFpO6Z71tQuYoT6dRTArK3koTJxKg/V5fZExzQT2cjh6cV2u M080BuKHQyDOIS/BMyB04EFy54PZ9hlg3tODAiejquMiLJaQMJhT3FEuLBhVQlLMu48Q oCe+sCeu1XZAAipv2A6MnDT8pcnwO+jRRZb6LsdieZGkt004x/c377HPbx7MKzjv+d78 5mIx/Z9n4M/u1PRB+CCT2BzS+RuxJbjCqwq7AiADzkHurJpRYP91F7lAjJgaUYJARjLg zPqp5mn3Or7Wws9gMzZV3dweJqGIpy2iT2WxtsOv9VIfwhunC0QKi16xs1Qnn/+UOrKV WTtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=okHcJs2Cc2s2NGFd3cbIMzhnoKFHepCEh8VYgpHYEm0=; b=x+m8+6LXmOGUJoI++cVi1wnCCUt7qSpl+AkoyDXsjdQgrg4n0xeM5ZJCOsYNwWTlYy VjwE9YsCJwphQYN+JLELfKhJ1jn6+cOkA4s1uhQJmQJDP3tkfgaBIoQqAIjPZ0UxJ5t1 4AbkCkBYKDxrQwdJvw4TIKcx5S+lgjQx0/635L/vu1l+V/6CrBBPlceV+IGooEkN+Ruy jAHEQnJmfm2JRO/4O8mUq+7N9WUb1y7nevoWEdeFspBFqoVvQQI87R7jpy3te3Hv2/HS SJkle3ddik7OBmO8qRfeBUgfGs1Mp6PY9O20weEwn77V9mhCYk1xezBakVofl5vosZBn 5DoA== X-Gm-Message-State: ANoB5pnieSYT6vuQ3nnIA9XfMHG9YAMar5es6Motf0YAS9lQSpmvbIVI 9+gvh5q+rDOsayj1bBBS5z2ZAQ== X-Google-Smtp-Source: AA0mqf6r8jH/vflciLJrs9jiSA9IdYjSUPCnsY4ZPe9oJbViqCgsY72JySFZD6l05gP/F8LvyADTmA== X-Received: by 2002:ac8:5f0b:0:b0:3a5:848e:d161 with SMTP id x11-20020ac85f0b000000b003a5848ed161mr980577qta.196.1667718865527; Sun, 06 Nov 2022 00:14:25 -0700 (PDT) Received: from fedora.attlocal.net (69-109-179-158.lightspeed.dybhfl.sbcglobal.net. [69.109.179.158]) by smtp.gmail.com with ESMTPSA id t29-20020a37ea1d000000b006af0ce13499sm3719038qkj.115.2022.11.06.00.14.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Nov 2022 00:14:25 -0700 (PDT) From: William Breathitt Gray To: linus.walleij@linaro.org, brgl@bgdev.pl Cc: andriy.shevchenko@linux.intel.com, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, William Breathitt Gray Subject: [PATCH 2/3] gpio: 104-idi-48: Migrate to regmap API Date: Thu, 3 Nov 2022 07:20:48 -0400 Message-Id: X-Mailer: git-send-email 2.37.3 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The regmap API supports IO port accessors so we can take advantage of regmap abstractions rather than handling access to the device registers directly in the driver. Signed-off-by: William Breathitt Gray --- drivers/gpio/gpio-104-idi-48.c | 54 ++++++++++++++++++++++++---------- 1 file changed, 39 insertions(+), 15 deletions(-) diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c index c5e231fde1af..5d9de5b5e7af 100644 --- a/drivers/gpio/gpio-104-idi-48.c +++ b/drivers/gpio/gpio-104-idi-48.c @@ -8,9 +8,9 @@ */ #include #include +#include #include #include -#include #include #include #include @@ -18,6 +18,7 @@ #include #include #include +#include #include #include =20 @@ -43,22 +44,27 @@ MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line = numbers"); * @port0: Port 0 Inputs * @unused: Unused * @port1: Port 1 Inputs - * @irq: Read: IRQ Status Register/IRQ Clear - * Write: IRQ Enable/Disable */ struct idi_48_reg { u8 port0[3]; u8 unused; u8 port1[3]; - u8 irq; }; =20 +#define IDI48_NAME "104-idi-48" + +#define IDI48_REGS_OFFSET 0x3 +#define IDI48_IRQ_STATUS 0x0 +#define IDI48_IRQ_CLEAR 0x0 +#define IDI48_IRQ_ENABLE 0x0 + /** * struct idi_48_gpio - GPIO device private data structure * @chip: instance of the gpio_chip * @lock: synchronization lock to prevent I/O race conditions * @irq_mask: input bits affected by interrupts * @reg: I/O address offset for the device registers + * @map: device register map * @cos_enb: Change-Of-State IRQ enable boundaries mask */ struct idi_48_gpio { @@ -66,6 +72,7 @@ struct idi_48_gpio { spinlock_t lock; unsigned char irq_mask[6]; struct idi_48_reg __iomem *reg; + struct regmap *map; unsigned char cos_enb; }; =20 @@ -122,7 +129,7 @@ static void idi_48_irq_mask(struct irq_data *data) =20 idi48gpio->cos_enb &=3D ~BIT(boundary); =20 - iowrite8(idi48gpio->cos_enb, &idi48gpio->reg->irq); + regmap_write(idi48gpio->map, IDI48_IRQ_ENABLE, idi48gpio->cos_enb); =20 exit: spin_unlock_irqrestore(&idi48gpio->lock, flags); @@ -151,7 +158,7 @@ static void idi_48_irq_unmask(struct irq_data *data) =20 idi48gpio->cos_enb |=3D BIT(boundary); =20 - iowrite8(idi48gpio->cos_enb, &idi48gpio->reg->irq); + regmap_write(idi48gpio->map, IDI48_IRQ_ENABLE, idi48gpio->cos_enb); =20 exit: spin_unlock_irqrestore(&idi48gpio->lock, flags); @@ -168,7 +175,7 @@ static int idi_48_irq_set_type(struct irq_data *data, u= nsigned int flow_type) } =20 static const struct irq_chip idi_48_irqchip =3D { - .name =3D "104-idi-48", + .name =3D IDI48_NAME, .irq_ack =3D idi_48_irq_ack, .irq_mask =3D idi_48_irq_mask, .irq_unmask =3D idi_48_irq_unmask, @@ -180,6 +187,7 @@ static const struct irq_chip idi_48_irqchip =3D { static irqreturn_t idi_48_irq_handler(int irq, void *dev_id) { struct idi_48_gpio *const idi48gpio =3D dev_id; + unsigned int irq_status; unsigned long cos_status; unsigned long boundary; unsigned long irq_mask; @@ -189,7 +197,8 @@ static irqreturn_t idi_48_irq_handler(int irq, void *de= v_id) =20 spin_lock(&idi48gpio->lock); =20 - cos_status =3D ioread8(&idi48gpio->reg->irq); + regmap_read(idi48gpio->map, IDI48_IRQ_STATUS, &irq_status); + cos_status =3D irq_status; =20 /* IRQ Status (bit 6) is active low (0 =3D IRQ generated by device) */ if (cos_status & BIT(6)) { @@ -231,18 +240,27 @@ static const char *idi48_names[IDI48_NGPIO] =3D { static int idi_48_irq_init_hw(struct gpio_chip *gc) { struct idi_48_gpio *const idi48gpio =3D gpiochip_get_data(gc); + unsigned int val; =20 /* Disable IRQ by default */ - iowrite8(0, &idi48gpio->reg->irq); - ioread8(&idi48gpio->reg->irq); - - return 0; + regmap_write(idi48gpio->map, IDI48_IRQ_ENABLE, 0x00); + return regmap_read(idi48gpio->map, IDI48_IRQ_CLEAR, &val); } =20 +static const struct regmap_config idi48_regmap_config =3D { + .name =3D IDI48_NAME, + .reg_bits =3D 8, + .val_bits =3D 8, + .reg_stride =3D 1, + .io_port =3D true, + .max_register =3D 0x0, +}; + static int idi_48_probe(struct device *dev, unsigned int id) { struct idi_48_gpio *idi48gpio; const char *const name =3D dev_name(dev); + void __iomem *regs; struct gpio_irq_chip *girq; int err; =20 @@ -256,9 +274,15 @@ static int idi_48_probe(struct device *dev, unsigned i= nt id) return -EBUSY; } =20 - idi48gpio->reg =3D devm_ioport_map(dev, base[id], IDI_48_EXTENT); - if (!idi48gpio->reg) + regs =3D devm_ioport_map(dev, base[id], IDI_48_EXTENT); + if (!regs) return -ENOMEM; + idi48gpio->reg =3D regs; + + idi48gpio->map =3D devm_regmap_init_mmio(dev, regs + IDI48_REGS_OFFSET, + &idi48_regmap_config); + if (IS_ERR(idi48gpio->map)) + return PTR_ERR(idi48gpio->map); =20 idi48gpio->chip.label =3D name; idi48gpio->chip.parent =3D dev; @@ -302,7 +326,7 @@ static int idi_48_probe(struct device *dev, unsigned in= t id) static struct isa_driver idi_48_driver =3D { .probe =3D idi_48_probe, .driver =3D { - .name =3D "104-idi-48" + .name =3D IDI48_NAME, }, }; module_isa_driver_with_irq(idi_48_driver, num_idi_48, num_irq); --=20 2.37.3