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[34.147.77.238]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ba4550468d6sm428078766b.52.2026.04.21.03.07.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 03:07:27 -0700 (PDT) From: Joshua Crofts To: jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Joshua Crofts Subject: [PATCH v2 1/4] iio: magnetometer: ak8975: header cleanup Date: Tue, 21 Apr 2026 10:07:19 +0000 Message-ID: <20260421100722.1296-2-joshua.crofts1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260421100722.1296-1-joshua.crofts1@gmail.com> References: <20260421100722.1296-1-joshua.crofts1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Clean up headers by removing proxy kernel.h header and adding new headers to ensure atomicity (array_size.h, dev_printk.h, types.h, asm/byteorder.h). Removed unused headers (slab.h, iio/sysfs.h, iio/trigger.h) and added minmax.h, property.h, wait.h, irqreturn.h to mitigate transient dependencies during compilation. Audited using the include-what-you-use tool. Signed-off-by: Joshua Crofts --- drivers/iio/magnetometer/ak8975.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/a= k8975.c index 44782c26698..a829bee4cf8 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -9,8 +9,6 @@ =20 #include #include -#include -#include #include #include #include @@ -20,11 +18,19 @@ #include #include #include +#include +#include +#include +#include +#include +#include +#include +#include + +#include =20 #include -#include #include -#include #include #include =20 --=20 2.47.3 From nobody Wed Jun 17 01:35:38 2026 Received: from mail-ej1-f47.google.com (mail-ej1-f47.google.com [209.85.218.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 773A1388E77 for ; Tue, 21 Apr 2026 10:07:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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[34.147.77.238]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ba4550468d6sm428078766b.52.2026.04.21.03.07.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 03:07:27 -0700 (PDT) From: Joshua Crofts To: jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Joshua Crofts Subject: [PATCH v2 2/4] iio: magnetometer: ak8975: replace usleep_range() with fsleep() Date: Tue, 21 Apr 2026 10:07:20 +0000 Message-ID: <20260421100722.1296-3-joshua.crofts1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260421100722.1296-1-joshua.crofts1@gmail.com> References: <20260421100722.1296-1-joshua.crofts1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace usleep_range() calls with fsleep(), passing the minimum value required by the sensor for hardware delays. fsleep() automatically selects the optimal sleep mechanism, simplifying driver code and time management. Signed-off-by: Joshua Crofts --- drivers/iio/magnetometer/ak8975.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/a= k8975.c index a829bee4cf8..7c37faaa4d9 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -462,7 +462,8 @@ static int ak8975_power_on(const struct ak8975_data *da= ta) * and the minimum wait time before mode setting is 100us, in * total 300us. Add some margin and say minimum 500us here. */ - usleep_range(500, 1000); + fsleep(500); + return 0; } =20 @@ -552,7 +553,7 @@ static int ak8975_set_mode(struct ak8975_data *data, en= um ak_ctrl_mode mode) =20 data->cntl_cache =3D regval; /* After mode change wait at least 100us */ - usleep_range(100, 500); + fsleep(100); =20 return 0; } --=20 2.47.3 From nobody Wed Jun 17 01:35:38 2026 Received: from mail-ej1-f49.google.com (mail-ej1-f49.google.com [209.85.218.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C19FC3B19C2 for ; Tue, 21 Apr 2026 10:07:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776766052; cv=none; b=OWuiiNNLXz5trgbgNKU1DN+d+0nEiHbTglJmyBN5xKlX+lQinNeqAlRvaSMfK7KrUV6xhciufD0ibU05BS3ogzCqnBUJCSdw6/mExtLu1FXaHww5tP9PSxUXRy1KA7IaIWBu9srFJ2//+kS98qU3A+3Gs8x8u7rkrF7tsLa/f7o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776766052; c=relaxed/simple; bh=4rc7d4rV7q22m4V5UAzTwchybsXTbSN/zluomuZK3Rw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=l53Il0bEPpWmskN6sPI2q0BNYz6ojbeLg+Bu39c4uTEID0Qj1beOe8b4GMCbAfemh+gxqFhs9eKIXNgGtQg74fVPHDQkX4PflYwswmh/jYiFPuL0nqp7Ir4jNWMoO6TfUuQ8obVfRMX2OEB1bhfkaJGruXxRC5PN29394yeTdkI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=OOIZNJP3; arc=none smtp.client-ip=209.85.218.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="OOIZNJP3" Received: by mail-ej1-f49.google.com with SMTP id a640c23a62f3a-b79f8f7ea43so557801766b.2 for ; Tue, 21 Apr 2026 03:07:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776766049; x=1777370849; darn=vger.kernel.org; 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=zcWEE0D2kUWLEnguD5ZkSGbltLSvh2TI9q4YJsxKb0I=; b=OOIZNJP3Wx3ND2iWZwzDu+MKgmmUaPf/7CvCl5Sj6zYZM+g2qALIqdVJS1CNEjGxUM TiqPmQ6UBw4a0ahSwoEF3v4df/20trmGO6Bm7ZClK1vR2Sa0if8lF1rGtUv0k0EXz28L /SpS44jESblP7QURgNwmETveKkpQdqOh4F62UkBVywn8OxZjLu3dbQiqLS9kz7x2KCNP DRm1mAqZTvg3iOszDalygxrby+XyDCGQeZKN4ypMSuMDzPzNX01LRv+oPLl0Nce5fDYE OFIVwkV1ltnCWgzjF3IQHqauhZDCdbH8Zu3w+R7koIO5MGfRM5O3A7BF328voDyuZq4C o6bQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776766049; x=1777370849; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=zcWEE0D2kUWLEnguD5ZkSGbltLSvh2TI9q4YJsxKb0I=; b=djNKMWNLUZaPC2B4Wd5zMaftcgwn97XpepozYOMCovU+o3X7V3lj5mkV+ubByXUIgv U3K5Y9WyzesX12hOZ8eji+ataLy9EFJSHYhuFXz3LpIdU4TTCTn1oGTAXamdUCfoLriq D35PiPbH9pHAKtbPJ/gTFLinRVLfcMr5N3BEs+RDGnhynkmVlLVE92D+1OESm1/xXves 5uRNWAuBm+zVZZf8cn3+n5x+MevvJ2Y1KjN6QTC9Os1zz7H1qQBs83VDWmExhCMYLF6z ii1HcKQ/YeXE3LqaE+89gp6HbEHFNISiVPLK34a2usOV5glTQoLXq8urLGWrdV74jWOZ LVyg== X-Forwarded-Encrypted: i=1; AFNElJ/KE8IukwTwa69ULYeoutYxpkCeqlkl8i2toEbiiMK/+weXMuVqS09/3p0Iza1Qq9JrpaC0NDiF/3mIxMg=@vger.kernel.org X-Gm-Message-State: AOJu0YycIa9zy96CHmnW8F9vzNBDBirktt6HKQ9l9T5UibGDXhNEZQA6 epwzficK31LLF1hNtux+V+GoXZTqEjBxOORkAFVr8hh7b0/oZWZ7akMX X-Gm-Gg: AeBDievp8U4l2NJt8MawRa+VTWdW5KYJLPK/2uJKdtZIBBlwGuHwlQVxMGOqkF93bZv M0PlZk6g77f66m8HUVVzQRykssrQ4fP8OerrBkvCnIfOXhVhOriush/kctM6iq96PwM8+cosZlo KJe7YmFu9oKuJMjmIjoodH7mb4gfp98txRALanKS+uUQYVyV6IUaQdeo/675OwLWdY9bQEUDGRh q0oFTXoGKYy/vJ8wGDfwPtc+/B5bgYczbvUJ67a7NHQFnKLEJVYM1R3wZ/tXPTUyTat0PLcaEbP w3KwBpPHlmhKcVjoblEVt7Q3mqngaRBOLPM8/AyFlFUjIIgtNYmWpT2BjNFA5MObgPqpaKWr3si vZFFIf7q03PPP4Vzq7uL6Q1bGORBjOUHZ8WlslcfNDivjW1Q6pnaf2BCHngP76e2pYDz3OJolx9 /46QBq9IuFjL65/Fr0pi3eaZukCuO3CIXdFnwJ6J5POtmx0dqgmn9AKoXdF3k/Xp1WHp222LulQ 66KEQJcnFHRMh/u4jRoJouMCU3PR8oy6tblZDcpqiXPJ9Fs85nRFCDcpQhL/DBakQtnZI8y2pme flezzRBh0X+35vwP16morJ8IUxMmv5JCbTxtH/AopQliQ/om/9/Tx64DFPBnjTDXei2/HR1QaAj I1HniQT8R31L1BomIBUUf3tSnWWQtgUCA/svJoTbDzpR8zIWTG4Vhzr6jNtcAdLgb2gV8TqYubk LejrqLnQI= X-Received: by 2002:a17:907:7293:b0:ba5:9407:92 with SMTP id a640c23a62f3a-ba594070b7cmr616041366b.4.1776766048956; Tue, 21 Apr 2026 03:07:28 -0700 (PDT) Received: from cs-280612103108-default.europe-west4-a.c.od237066db22328bb-tp.internal (238.77.147.34.bc.googleusercontent.com. [34.147.77.238]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ba4550468d6sm428078766b.52.2026.04.21.03.07.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 03:07:28 -0700 (PDT) From: Joshua Crofts To: jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Joshua Crofts Subject: [PATCH v2 3/4] iio: magnetometer: ak8975: change 'u8*' to 'u8 *' in cast Date: Tue, 21 Apr 2026 10:07:21 +0000 Message-ID: <20260421100722.1296-4-joshua.crofts1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260421100722.1296-1-joshua.crofts1@gmail.com> References: <20260421100722.1296-1-joshua.crofts1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Change 'u8*' cast to 'u8 *' as the former triggers a checkpatch error. Signed-off-by: Joshua Crofts --- drivers/iio/magnetometer/ak8975.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/a= k8975.c index 7c37faaa4d9..d0d95d3914a 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -760,9 +760,10 @@ static int ak8975_read_axis(struct iio_dev *indio_dev,= int index, int *val) if (ret) goto exit; =20 - ret =3D i2c_smbus_read_i2c_block_data_or_emulated( - client, def->data_regs[index], - sizeof(rval), (u8*)&rval); + ret =3D i2c_smbus_read_i2c_block_data_or_emulated(client, + def->data_regs[index], + sizeof(rval), + (u8 *)&rval); if (ret < 0) goto exit; =20 --=20 2.47.3 From nobody Wed Jun 17 01:35:38 2026 Received: from mail-ej1-f51.google.com (mail-ej1-f51.google.com [209.85.218.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D0D73B6343 for ; 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[34.147.77.238]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ba4550468d6sm428078766b.52.2026.04.21.03.07.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 03:07:29 -0700 (PDT) From: Joshua Crofts To: jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Joshua Crofts Subject: [PATCH v2 4/4] iio: magnetometer: ak8975: modernize polling loops with iopoll() macros Date: Tue, 21 Apr 2026 10:07:22 +0000 Message-ID: <20260421100722.1296-5-joshua.crofts1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260421100722.1296-1-joshua.crofts1@gmail.com> References: <20260421100722.1296-1-joshua.crofts1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The driver currently uses while loops and msleep() for polling during conversion waits. Replace the custom polling loops with readx_poll_timeout() and read_poll_timeout() macros from . This reduces boilerplate, standardizes timeout handling and improves overall code readability, keeping the original timing and error behaviour. Assisted-by: Gemini:3.1-Pro Signed-off-by: Joshua Crofts --- drivers/iio/magnetometer/ak8975.c | 44 ++++++++++++++----------------- 1 file changed, 20 insertions(+), 24 deletions(-) diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/a= k8975.c index d0d95d3914a..1b9386b7521 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -21,9 +21,11 @@ #include #include #include +#include #include #include #include +#include #include #include =20 @@ -653,17 +655,15 @@ static int ak8975_setup(struct i2c_client *client) static int wait_conversion_complete_gpio(struct ak8975_data *data) { struct i2c_client *client =3D data->client; - u32 timeout_ms =3D AK8975_MAX_CONVERSION_TIMEOUT; int ret; + int val; =20 /* Wait for the conversion to complete. */ - while (timeout_ms) { - msleep(AK8975_CONVERSION_DONE_POLL_TIME); - if (gpiod_get_value(data->eoc_gpiod)) - break; - timeout_ms -=3D AK8975_CONVERSION_DONE_POLL_TIME; - } - if (!timeout_ms) { + ret =3D readx_poll_timeout(gpiod_get_value, data->eoc_gpiod, val, + val !=3D 0, + AK8975_CONVERSION_DONE_POLL_TIME * USEC_PER_MSEC, + AK8975_MAX_CONVERSION_TIMEOUT * USEC_PER_MSEC); + if (ret) { dev_err(&client->dev, "Conversion timeout happened\n"); return -EINVAL; } @@ -678,30 +678,26 @@ static int wait_conversion_complete_gpio(struct ak897= 5_data *data) static int wait_conversion_complete_polled(struct ak8975_data *data) { struct i2c_client *client =3D data->client; - u8 read_status; - u32 timeout_ms =3D AK8975_MAX_CONVERSION_TIMEOUT; int ret; + int val; =20 /* Wait for the conversion to complete. */ - while (timeout_ms) { - msleep(AK8975_CONVERSION_DONE_POLL_TIME); - ret =3D i2c_smbus_read_byte_data(client, - data->def->ctrl_regs[ST1]); - if (ret < 0) { - dev_err(&client->dev, "Error in reading ST1\n"); - return ret; - } - read_status =3D ret; - if (read_status) - break; - timeout_ms -=3D AK8975_CONVERSION_DONE_POLL_TIME; + ret =3D read_poll_timeout(i2c_smbus_read_byte_data, val, val !=3D 0, + AK8975_CONVERSION_DONE_POLL_TIME * USEC_PER_MSEC, + AK8975_MAX_CONVERSION_TIMEOUT * USEC_PER_MSEC, + true, + client, data->def->ctrl_regs[ST1]); + if (val < 0) { + dev_err(&client->dev, "Error in reading ST1\n"); + return val; } - if (!timeout_ms) { + + if (ret =3D=3D -ETIMEDOUT) { dev_err(&client->dev, "Conversion timeout happened\n"); return -EINVAL; } =20 - return read_status; + return val; } =20 /* Returns 0 if the end of conversion interrupt occurred or -ETIME otherwi= se */ --=20 2.47.3