Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Marcus Folkesson <marcus.folkesson@gmail.com>
To:     Marcus Folkesson <marcus.folkesson@gmail.com>,
        Kent Gustavsson <kent@minoris.se>,
        Jonathan Cameron <jic23@kernel.org>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andy Shevchenko <andy.shevchenko@gmail.com>
Cc:     linux-iio@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v5 4/9] iio: adc: mcp3911: use resource-managed version of iio_device_register
Date:   Tue,  9 Aug 2022 09:36:43 +0200
Message-Id: <20220809073648.167821-5-marcus.folkesson@gmail.com>
In-Reply-To: <20220809073648.167821-1-marcus.folkesson@gmail.com>
References: <20220809073648.167821-1-marcus.folkesson@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Keep using managed resources as much as possible.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
 drivers/iio/adc/mcp3911.c | 56 ++++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 30 deletions(-)

diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c
index 890af7dca62d..29d73b847f5f 100644
--- a/drivers/iio/adc/mcp3911.c
+++ b/drivers/iio/adc/mcp3911.c
@@ -258,6 +258,18 @@ static int mcp3911_config(struct mcp3911 *adc)
 	return  mcp3911_write(adc, MCP3911_REG_CONFIG, configreg, 2);
 }
 
+static void mcp3911_cleanup_clock(void *_adc)
+{
+	struct mcp3911 *adc = _adc;
+	clk_disable_unprepare(adc->clki);
+}
+
+static void mcp3911_cleanup_regulator(void *_adc)
+{
+	struct mcp3911 *adc = _adc;
+	regulator_disable(adc->vref);
+}
+
 static int mcp3911_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
@@ -286,6 +298,11 @@ static int mcp3911_probe(struct spi_device *spi)
 		ret = regulator_enable(adc->vref);
 		if (ret)
 			return ret;
+
+		ret = devm_add_action_or_reset(&spi->dev,
+				mcp3911_cleanup_regulator, adc);
+		if (ret)
+			return ret;
 	}
 
 	adc->clki = devm_clk_get(&adc->spi->dev, NULL);
@@ -296,21 +313,25 @@ static int mcp3911_probe(struct spi_device *spi)
 			dev_err(&adc->spi->dev,
 				"failed to get adc clk (%ld)\n",
 				PTR_ERR(adc->clki));
-			ret = PTR_ERR(adc->clki);
-			goto reg_disable;
+			return PTR_ERR(adc->clki);
 		}
 	} else {
 		ret = clk_prepare_enable(adc->clki);
 		if (ret < 0) {
 			dev_err(&adc->spi->dev,
 				"Failed to enable clki: %d\n", ret);
-			goto reg_disable;
+			return ret;
 		}
+
+		ret = devm_add_action_or_reset(&spi->dev,
+				mcp3911_cleanup_clock, adc);
+		if (ret)
+			return ret;
 	}
 
 	ret = mcp3911_config(adc);
 	if (ret)
-		goto clk_disable;
+		return ret;
 
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
@@ -322,31 +343,7 @@ static int mcp3911_probe(struct spi_device *spi)
 
 	mutex_init(&adc->lock);
 
-	ret = iio_device_register(indio_dev);
-	if (ret)
-		goto clk_disable;
-
-	return ret;
-
-clk_disable:
-	clk_disable_unprepare(adc->clki);
-reg_disable:
-	if (adc->vref)
-		regulator_disable(adc->vref);
-
-	return ret;
-}
-
-static void mcp3911_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct mcp3911 *adc = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-
-	clk_disable_unprepare(adc->clki);
-	if (adc->vref)
-		regulator_disable(adc->vref);
+	return devm_iio_device_register(&adc->spi->dev, indio_dev);
 }
 
 static const struct of_device_id mcp3911_dt_ids[] = {
@@ -367,7 +364,6 @@ static struct spi_driver mcp3911_driver = {
 		.of_match_table = mcp3911_dt_ids,
 	},
 	.probe = mcp3911_probe,
-	.remove = mcp3911_remove,
 	.id_table = mcp3911_id,
 };
 module_spi_driver(mcp3911_driver);
-- 
2.37.1