[PATCH RESEND v2 5/5] extcon: extcon-max8997: Simplify driver using devm

Matti Vaittinen
2021-06-08T10:11:18Z

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Simplify driver by switching to use the resource managed IRQ
requesting and resource managed work-queue initialization.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
Changelog:
v2:
- IRQ freeing fix splitted in own patch

Please note that the change is compile-tested only. All proper testing is
highly appreciated.
---
drivers/extcon/extcon-max8997.c | 47 +++++++++++----------------------
1 file changed, 16 insertions(+), 31 deletions(-)

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index c15a612067af..bbc592823570 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -5,6 +5,7 @@
// Copyright (C) 2012 Samsung Electronics
// Donggeun Kim <dg77.kim@samsung.com>

+#include <linux/devm-helpers.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
@@ -650,27 +651,30 @@ static int max8997_muic_probe(struct platform_device *pdev)
mutex_init(&info->mutex);

INIT_WORK(&info->irq_work, max8997_muic_irq_work);
+ ret = devm_work_autocancel(&pdev->dev, &info->irq_work,
+ max8997_muic_irq_work);
+ if (ret)
+ return ret;

for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
struct max8997_muic_irq *muic_irq = &muic_irqs[i];
unsigned int virq = 0;

virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
- if (!virq) {
- ret = -EINVAL;
- goto err_irq;
- }
+ if (!virq)
+ return -EINVAL;
+
muic_irq->virq = virq;

- ret = request_threaded_irq(virq, NULL,
- max8997_muic_irq_handler,
- IRQF_NO_SUSPEND,
- muic_irq->name, info);
+ ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+ max8997_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
if (ret) {
dev_err(&pdev->dev,
"failed: irq request (IRQ: %d, error :%d)\n",
muic_irq->irq, ret);
- goto err_irq;
+ return ret;
}
}

@@ -678,14 +682,13 @@ static int max8997_muic_probe(struct platform_device *pdev)
info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable);
if (IS_ERR(info->edev)) {
dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
- ret = PTR_ERR(info->edev);
- goto err_irq;
+ return PTR_ERR(info->edev);
}

ret = devm_extcon_dev_register(&pdev->dev, info->edev);
if (ret) {
dev_err(&pdev->dev, "failed to register extcon device\n");
- goto err_irq;
+ return ret;
}

if (pdata && pdata->muic_pdata) {
@@ -733,7 +736,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
2, info->status);
if (ret) {
dev_err(info->dev, "failed to read MUIC register\n");
- goto err_irq;
+ return ret;
}
cable_type = max8997_muic_get_cable_type(info,
MAX8997_CABLE_GROUP_ADC, &attached);
@@ -756,23 +759,6 @@ static int max8997_muic_probe(struct platform_device *pdev)
delay_jiffies);

return 0;
-
-err_irq:
- while (--i >= 0)
- free_irq(muic_irqs[i].virq, info);
- return ret;
-}
-
-static int max8997_muic_remove(struct platform_device *pdev)
-{
- struct max8997_muic_info *info = platform_get_drvdata(pdev);
- int i;
-
- for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
- free_irq(muic_irqs[i].virq, info);
- cancel_work_sync(&info->irq_work);
-
- return 0;
}

static struct platform_driver max8997_muic_driver = {
@@ -780,7 +766,6 @@ static struct platform_driver max8997_muic_driver = {
.name = DEV_NAME,
},
.probe = max8997_muic_probe,
- .remove = max8997_muic_remove,
};

module_platform_driver(max8997_muic_driver);
--
2.25.4

--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]

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