linux-kernel - [PATCH v7 2/6] iio: adc: mcp3911: make use of dev_err

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Date:   Sun, 20 Aug 2023 12:26:06 +0200
From:   Marcus Folkesson <marcus.folkesson@...il.com>
To:     Marcus Folkesson <marcus.folkesson@...il.com>,
        Kent Gustavsson <kent@...oris.se>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Cosmin Tanislav <demonsingur@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        ChiYuan Huang <cy_huang@...htek.com>,
        Haibo Chen <haibo.chen@....com>,
        Ramona Bolboaca <ramona.bolboaca@...log.com>,
        Ibrahim Tilki <Ibrahim.Tilki@...log.com>,
        ChiaEn Wu <chiaen_wu@...htek.com>,
        William Breathitt Gray <william.gray@...aro.org>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v7 2/6] iio: adc: mcp3911: make use of dev_err_probe()

Simplify code by switch to dev_err_probe().

Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---

Notes:
    v5:
        - New patch in this series
    v6:
        - fix xmas tree order
    v7:
        - use dev_err_probe for config and scale function as well

 drivers/iio/adc/mcp3911.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c
index 974c5bd923a6..7fb3ab4a4256 100644
--- a/drivers/iio/adc/mcp3911.c
+++ b/drivers/iio/adc/mcp3911.c
@@ -277,10 +277,7 @@ static int mcp3911_calc_scale_table(struct mcp3911 *adc)
 	if (adc->vref) {
 		ret = regulator_get_voltage(adc->vref);
 		if (ret < 0) {
-			dev_err(&adc->spi->dev,
-				"failed to get vref voltage: %d\n",
-			       ret);
-			return ret;
+			return dev_err_probe(&adc->spi->dev, ret, "failed to get vref voltage\n");
 		}
 
 		ref = ret / 1000;
@@ -396,10 +393,9 @@ static int mcp3911_config(struct mcp3911 *adc)
 	if (ret)
 		device_property_read_u32(dev, "device-addr", &adc->dev_addr);
 	if (adc->dev_addr > 3) {
-		dev_err(&adc->spi->dev,
-			"invalid device address (%i). Must be in range 0-3.\n",
-			adc->dev_addr);
-		return -EINVAL;
+		return dev_err_probe(dev, -EINVAL,
+				     "invalid device address (%i). Must be in range 0-3.\n",
+				     adc->dev_addr);
 	}
 	dev_dbg(&adc->spi->dev, "use device address %i\n", adc->dev_addr);
 
@@ -466,6 +462,7 @@ static const struct iio_trigger_ops mcp3911_trigger_ops = {
 
 static int mcp3911_probe(struct spi_device *spi)
 {
+	struct device *dev = &spi->dev;
 	struct iio_dev *indio_dev;
 	struct mcp3911 *adc;
 	int ret;
@@ -482,10 +479,7 @@ static int mcp3911_probe(struct spi_device *spi)
 		if (PTR_ERR(adc->vref) == -ENODEV) {
 			adc->vref = NULL;
 		} else {
-			dev_err(&adc->spi->dev,
-				"failed to get regulator (%ld)\n",
-				PTR_ERR(adc->vref));
-			return PTR_ERR(adc->vref);
+			return dev_err_probe(dev, PTR_ERR(adc->vref), "failed to get regulator\n");
 		}
 
 	} else {
@@ -504,10 +498,7 @@ static int mcp3911_probe(struct spi_device *spi)
 		if (PTR_ERR(adc->clki) == -ENOENT) {
 			adc->clki = NULL;
 		} else {
-			dev_err(&adc->spi->dev,
-				"failed to get adc clk (%ld)\n",
-				PTR_ERR(adc->clki));
-			return PTR_ERR(adc->clki);
+			return dev_err_probe(dev, PTR_ERR(adc->clki), "failed to get adc clk\n");
 		}
 	}
 
-- 
2.41.0