linux-kernel - [PATCH v5 2/2] iio: adc: ti-ads1298: Add driver

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Date: Fri, 16 Feb 2024 17:53:03 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mike Looijmans <mike.looijmans@...ic.nl>, devicetree@...r.kernel.org,
	linux-iio@...r.kernel.org
Cc: Mike Looijmans <mike.looijmans@...ic.nl>,
	Arnd Bergmann <arnd@...nel.org>,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Liam Beguin <liambeguin@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Maksim Kiselev <bigunclemax@...il.com>,
	Marcus Folkesson <marcus.folkesson@...il.com>,
	Marius Cristea <marius.cristea@...rochip.com>,
	Mark Brown <broonie@...nel.org>,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Okan Sahin <okan.sahin@...log.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v5 2/2] iio: adc: ti-ads1298: Add driver

..

+	if (reset_gpio) {
+		/*
+		 * Deassert reset now that clock and power are active.
+		 * Minimum reset pulsewidth is 2 clock cycles.
+		 */
+		udelay(ADS1298_CLOCKS_TO_USECS(2));

This is sleeping context and you are calling unsleeping function. I haven't
checked the macro implementation and I have no idea what is the maximum it may
give, but making code robust just use fsleep() call.

+		gpiod_set_value_cansleep(reset_gpio, 0);
+	} else {
+		ret = ads1298_write_cmd(priv, ADS1298_CMD_RESET);
+		if (ret)
+			return dev_err_probe(dev, ret, "RESET failed\n");
+	}
+	/* Wait 18 clock cycles for reset command to complete */
+	udelay(ADS1298_CLOCKS_TO_USECS(18));

Ditto.

..

If it's the only issue I think Jonathan can modify when applying
(no new patch version would be needed).

-- 
With Best Regards,
Andy Shevchenko