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Tue, 06 Feb 2024 19:37:05 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCUYQrgi4CPyFz0nIMqpFUYqmQ082XxzQPgdfQbNOWxnfpu2DyM35zyk5XvEXPVI7qgJHj5uTzqJXPfZb966sodUZNbN0qKR/TXaZWDo8iCVzhirdvZ8X/wBjb5lO2E7osceGmA5NLQkcKcB7TsBxpfaHIVq2r0uH370BoNdGhINB5iYE33oVtY+t8f3Zl9EwMPsmMG+Lp39x9FPp6mqIQm2Awq8dTtTfzlHrCxg26sN/M6W2KGib8vhsy2DzJp2R1xrmB0IBYs1f2kc Received: from demon-pc.localdomain ([188.24.52.65]) by smtp.gmail.com with ESMTPSA id p5-20020a5d4e05000000b0033b422356fbsm373447wrt.80.2024.02.06.19.37.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Feb 2024 19:37:05 -0800 (PST) From: Cosmin Tanislav To: Cc: Lars-Peter Clausen , Michael Hennerich , Cosmin Tanislav , Jonathan Cameron , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Cosmin Tanislav Subject: [PATCH 1/2] iio: accel: adxl367: fix DEVID read after reset Date: Wed, 7 Feb 2024 05:36:50 +0200 Message-ID: <20240207033657.206171-1-demonsingur@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790209734354021784 X-GMAIL-MSGID: 1790209734354021784 regmap_read_poll_timeout() will not sleep before reading, causing the first read to return -ENXIO on I2C, since the chip does not respond to it while it is being reset. The datasheet specifies that a soft reset operation has a latency of 7.5ms. Add a 15ms sleep between reset and reading the DEVID register, and switch to a simple regmap_read() call. Signed-off-by: Cosmin Tanislav Reviewed-by: Nuno Sa --- drivers/iio/accel/adxl367.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c index 834ee6d63947..210228affb80 100644 --- a/drivers/iio/accel/adxl367.c +++ b/drivers/iio/accel/adxl367.c @@ -1368,9 +1368,11 @@ static int adxl367_verify_devid(struct adxl367_state *st) unsigned int val; int ret; - ret = regmap_read_poll_timeout(st->regmap, ADXL367_REG_DEVID, val, - val == ADXL367_DEVID_AD, 1000, 10000); + ret = regmap_read(st->regmap, ADXL367_REG_DEVID, &val); if (ret) + return dev_err_probe(st->dev, ret, "Failed to read dev id\n"); + + if (val != ADXL367_DEVID_AD) return dev_err_probe(st->dev, -ENODEV, "Invalid dev id 0x%02X, expected 0x%02X\n", val, ADXL367_DEVID_AD); @@ -1449,6 +1451,8 @@ int adxl367_probe(struct device *dev, const struct adxl367_ops *ops, if (ret) return ret; + fsleep(15000); + ret = adxl367_verify_devid(st); if (ret) return ret; From patchwork Wed Feb 7 03:36:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cosmin Tanislav X-Patchwork-Id: 197720 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:168b:b0:106:860b:bbdd with SMTP id ma11csp1979103dyb; Tue, 6 Feb 2024 19:37:39 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWpqUEAHWDPaaP7hlhOGmYoShjDPYqjRVhSPWJrp2orLQHB2rJcr35AU+J097GvzXcNJF/L4aYYIRV46HTqeOys8mucKQ== X-Google-Smtp-Source: AGHT+IERVd/V/l4YhqBW7QDefur9imssVbWiwsVSWglMVle9QvwTIprmTSM+XsCMbDp0CKgtSU9M X-Received: by 2002:ad4:5ae8:0:b0:68c:67c2:6580 with SMTP id c8-20020ad45ae8000000b0068c67c26580mr5421011qvh.31.1707277059071; Tue, 06 Feb 2024 19:37:39 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1707277059; cv=pass; d=google.com; s=arc-20160816; b=qntlbJQE3+YKeXARs2w+XEm9/pCCG2qL/bWWxJNJrxhqT5YqpP9h/QxNNnaWBpRsIq uunHYB8KvbbRES9mDf9nU1WqV6PZ9aVikBOOjrBYZWUm5h5NuElA7ouq1ynsDfQIPE0J AKpgr1inyV5QuMkSvN4hzsSysI8nNaiOzEUuCGvbQXhsByDMJAgVLN/4mELoHoeNkD1b GWaRuu0mFaNBtqnBWEfQZFnbrU8KrSm+tq/tOC67/Ir6unr32rZi1TUdQYQMay3j9hyb sA5Zq8vCzHqeyuiO9xijIjKv92k5FQ+Zj8X50aDAgq3Ut9VG7Gkm5T/QlJl7wVghy8b9 T03A== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=jO4v0nbCePd1+AMeAWjbKpihfEE3SN8JiqCXFyWGK0Y=; fh=ImOqC5mBS+wuHiZwSumpI17Ao5xSQhFh6+rwC80+g7o=; b=haU3QaHSLsQDSFO3snp1vXF6w6xudZsM+6Rh4L0FKkpBssHIUpSonTinKwbqce7fyq zPanPq/Zq0QRI5PHRO+aQzA+6lx6Naba1zu5dbubVBQKSdfkVFBnf5DLxqXzU0AvRnLF p+ktTQ5lsjEI/88BABrBncYhX0wojixAw7z/2XdRf3eMLDnDaFppwRDU7jJ7OHhiI5vD rFNE2ahO7YWMW36HnVUPMye9966y1Hx4+3JaylqAjERoAQaMPR5JgK9XLnmSMy0Mtj9B dp9Tja3crFLyiW+caKzJAGn3Kwg5Ou1mAa+egPQaIs2vAt4GGmPC8VXc/6xwul3q1MHQ Iv3w==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=WqSEWnnw; arc=pass (i=1 spf=pass spfdomain=gmail.com dkim=pass dkdomain=gmail.com dmarc=pass fromdomain=gmail.com); spf=pass (google.com: domain of linux-kernel+bounces-55899-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-55899-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com X-Forwarded-Encrypted: i=2; AJvYcCWyw6GQJ1d7IJQubOruimef3DYwsjGaKBkJUeE6dNZimaoJcE1IiWw/rl/gB5bCvbO3wbxvVd7b7yxYWuSXGam96pp2JA== Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. 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Fix this mistake. Signed-off-by: Cosmin Tanislav Reviewed-by: Nuno Sa --- drivers/iio/accel/adxl367_i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c index b595fe94f3a3..62c74bdc0d77 100644 --- a/drivers/iio/accel/adxl367_i2c.c +++ b/drivers/iio/accel/adxl367_i2c.c @@ -11,7 +11,7 @@ #include "adxl367.h" -#define ADXL367_I2C_FIFO_DATA 0x42 +#define ADXL367_I2C_FIFO_DATA 0x18 struct adxl367_i2c_state { struct regmap *regmap;