linux-kernel - [PATCH v6 06/12] thermal: qoriq: Pass data to qoriq_tmu

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Message-Id: <20190617161458.3754-7-andrew.smirnov@gmail.com>
Date:   Mon, 17 Jun 2019 09:14:52 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-pm@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Lucas Stach <l.stach@...gutronix.de>,
        Chris Healy <cphealy@...il.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Angus Ainslie <angus@...ea.ca>, linux-imx@....com,
        linux-kernel@...r.kernel.org
Subject: [PATCH v6 06/12] thermal: qoriq: Pass data to qoriq_tmu_calibration() directly

We can simplify error cleanup code if instead of passing a "struct
platform_device *" to qoriq_tmu_calibration() and deriving a bunch of
pointers from it, we pass those pointers directly. This way we won't
be force to call platform_set_drvdata() as early in qoriq_tmu_probe()
and consequently would be able to drop the "err_iomap" error path.

Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Tested-by: Lucas Stach <l.stach@...gutronix.de>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Eduardo Valentin <edubezval@...il.com>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Angus Ainslie (Purism) <angus@...ea.ca>
Cc: linux-imx@....com
Cc: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/thermal/qoriq_thermal.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 61700881d9f0..62d7a0efb837 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -140,16 +140,16 @@ static int qoriq_tmu_register_tmu_zone(struct device *dev,
 	return 0;
 }
 
-static int qoriq_tmu_calibration(struct platform_device *pdev)
+static int qoriq_tmu_calibration(struct device *dev,
+				 struct qoriq_tmu_data *data)
 {
 	int i, val, len;
 	u32 range[4];
 	const u32 *calibration;
-	struct device_node *np = pdev->dev.of_node;
-	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
+	struct device_node *np = dev->of_node;
 
 	if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
-		dev_err(&pdev->dev, "missing calibration range.\n");
+		dev_err(dev, "missing calibration range.\n");
 		return -ENODEV;
 	}
 
@@ -161,7 +161,7 @@ static int qoriq_tmu_calibration(struct platform_device *pdev)
 
 	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
 	if (calibration == NULL || len % 8) {
-		dev_err(&pdev->dev, "invalid calibration data.\n");
+		dev_err(dev, "invalid calibration data.\n");
 		return -ENODEV;
 	}
 
@@ -199,20 +199,17 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
-	platform_set_drvdata(pdev, data);
-
 	data->little_endian = of_property_read_bool(np, "little-endian");
 
 	data->regs = of_iomap(np, 0);
 	if (!data->regs) {
 		dev_err(dev, "Failed to get memory region\n");
-		ret = -ENODEV;
-		goto err_iomap;
+		return -ENODEV;
 	}
 
 	qoriq_tmu_init_device(data);	/* TMU initialization */
 
-	ret = qoriq_tmu_calibration(pdev);	/* TMU calibration */
+	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
 	if (ret < 0)
 		goto err_tmu;
 
@@ -220,17 +217,16 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(dev, "Failed to register sensors\n");
 		ret = -ENODEV;
-		goto err_iomap;
+		goto err_tmu;
 	}
 
+	platform_set_drvdata(pdev, data);
+
 	return 0;
 
 err_tmu:
 	iounmap(data->regs);
 
-err_iomap:
-	platform_set_drvdata(pdev, NULL);
-
 	return ret;
 }
 
-- 
2.21.0