From: Ariana Lazar <ariana.lazar@microchip.com>
To: "Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>
Cc: <linux-kernel@vger.kernel.org>, <linux-iio@vger.kernel.org>,
<devicetree@vger.kernel.org>,
Ariana Lazar <ariana.lazar@microchip.com>
Subject: [PATCH v5 04/10] iio: dac: mcp47feb02: Increase EEPROM Programming Write Cycle Time
Date: Wed, 9 Sep 2026 17:18:47 +0300 [thread overview]
Message-ID: <20260909-mcp47feb02_refactor-v5-4-8b67bcab93d1@microchip.com> (raw)
In-Reply-To: <20260909-mcp47feb02_refactor-v5-0-8b67bcab93d1@microchip.com>
Increase the EEPROM write polling timeout to prevent -ETIMEDOUT errors and
incomplete nonvolatile write cycle, according to the time specified in the
datasheets (11-16 ms).
Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com>
---
drivers/iio/dac/mcp47feb02.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/dac/mcp47feb02.c b/drivers/iio/dac/mcp47feb02.c
index 2ee981393aa1a2dc0bf65d25ab937132fe2e7bf1..53a7bf4e71c46e75dff8bb5b16c343e7552f6901 100644
--- a/drivers/iio/dac/mcp47feb02.c
+++ b/drivers/iio/dac/mcp47feb02.c
@@ -449,7 +449,7 @@ static int mcp47feb02_write_to_eeprom(struct mcp47feb02_data *data, unsigned int
ret = regmap_read_poll_timeout(data->regmap, MCP47FEB02_GAIN_CTRL_STATUS_REG_ADDR,
eewa_val,
!(eewa_val & MCP47FEB02_GAIN_BIT_STATUS_EEWA_MASK),
- USEC_PER_MSEC, USEC_PER_MSEC * 5);
+ USEC_PER_MSEC, USEC_PER_MSEC * 1500);
if (ret)
return ret;
@@ -509,7 +509,7 @@ static ssize_t store_eeprom_store(struct device *dev, struct device_attribute *a
ret = regmap_read_poll_timeout(data->regmap, MCP47FEB02_GAIN_CTRL_STATUS_REG_ADDR, eewa_val,
!(eewa_val & MCP47FEB02_GAIN_BIT_STATUS_EEWA_MASK),
- USEC_PER_MSEC, USEC_PER_MSEC * 5);
+ USEC_PER_MSEC, USEC_PER_MSEC * 1500);
if (ret)
return ret;
--
2.43.0
next prev parent reply other threads:[~2026-09-09 14:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-09 14:18 [PATCH v5 00/10] Refactor Microchip MCP47FEB02 I2C driver in separate modules to add support for MCP48FEB02 SPI driver Ariana Lazar
2026-09-09 14:18 ` [PATCH v5 01/10] iio: dac: mcp47feb02: initialize dac_data field in channel data struct at probe Ariana Lazar
2026-09-09 14:18 ` [PATCH v5 02/10] iio: dac: mcp47feb02: Fix gain field initialization for active channels Ariana Lazar
2026-09-13 21:43 ` Jonathan Cameron
2026-09-09 14:18 ` [PATCH v5 03/10] iio: dac: mcp47feb02: Return len when disabling EEPROM store Ariana Lazar
2026-09-09 14:18 ` Ariana Lazar [this message]
2026-09-10 6:11 ` [PATCH v5 04/10] iio: dac: mcp47feb02: Increase EEPROM Programming Write Cycle Time Andy Shevchenko
2026-09-09 14:18 ` [PATCH v5 05/10] iio: dac: mcp47feb02: Avoid unjustified probe failure on missing label Ariana Lazar
2026-09-10 6:12 ` Andy Shevchenko
2026-09-09 14:18 ` [PATCH v5 06/10] iio: dac: mcp47feb02: correct typo from a comment Ariana Lazar
2026-09-09 14:18 ` [PATCH v5 07/10] iio: dac: mcp47feb02: rename command mask define Ariana Lazar
2026-09-09 14:18 ` [PATCH v5 08/10] iio: dac: mcp47feb02: refactor MCP47FEB02 I2C driver into two modules Ariana Lazar
2026-09-10 6:16 ` Andy Shevchenko
2026-09-13 21:51 ` Jonathan Cameron
2026-09-09 14:18 ` [PATCH v5 09/10] dt-bindings: iio: dac: add support for MCP48FEB02 SPI Ariana Lazar
2026-09-09 14:18 ` [PATCH v5 10/10] iio: dac: add support for Microchip MCP48FEB02 Ariana Lazar
2026-09-10 6:17 ` Andy Shevchenko
2026-09-10 6:18 ` [PATCH v5 00/10] Refactor Microchip MCP47FEB02 I2C driver in separate modules to add support for MCP48FEB02 SPI driver Andy Shevchenko
2026-09-13 21:55 ` Jonathan Cameron
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