On 07/13/2012 03:34 PM, Dmitry Torokhov wrote:
Hi Qiao,
On Wed, Jul 11, 2012 at 05:05:04PM +0800, Qiao Zhou wrote:
+
+static int __devinit pm80x_onkey_probe(struct platform_device *pdev)
+{
+
+ struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct pm80x_onkey_info *info;
+ int err;
+
+ info =
+ devm_kzalloc(&pdev->dev, sizeof(struct pm80x_onkey_info),
+ GFP_KERNEL);
Please switch to normal kzalloc/kfree, because:
1. You are not using devm_* API correctly - it was designed so that you
do not need to explicitly call devm_free as resources will be freed when
device is unbound from the driver (or if binf fails). But since you are
explicitly calling devm_free() in error paths and in
pm80x_onkey_remove() there is no point in even using this API.
2. At this time I prefer not use devm_ API in input drivers are it
causes mixed resource tracking strategy (automatic vs manual) which is
confusing.
thanks for advise. would update.
+ if (!info)
+ return -ENOMEM;
+
+ info->pm80x = chip;
+
+ info->irq = platform_get_irq(pdev, 0);
+ if (info->irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource!\n");
+ err = -EINVAL;
+ goto out;
+ }
+
+ info->map = info->pm80x->regmap;
+ if (!info->map) {
+ dev_err(&pdev->dev, "no regmap!\n");
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
+ IRQF_ONESHOT, "onkey", info);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
+ info->irq, err);
+ goto out;
+ }
If we get IRQ here we'll OOPS. Please allocate input device before
requesting IRQ (but register like you do now, as the last action, after
requesting IRQ).
would fix it.
+
+ info->idev = input_allocate_device();
+ if (!info->idev) {
+ dev_err(&pdev->dev, "Failed to allocate input dev\n");
+ err = -ENOMEM;
+ goto out_irq;
+ }
+
+ info->idev->name = "88pm80x_on";
+ info->idev->phys = "88pm80x_on/input0";
+ info->idev->id.bustype = BUS_I2C;
+ info->idev->dev.parent = &pdev->dev;
+ info->idev->evbit[0] = BIT_MASK(EV_KEY);
+ info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
__set_bit(KEY_POWER, info->idev->keybit);
would update.
+
+ err = input_register_device(info->idev);
+ if (err) {
+ dev_err(&pdev->dev, "Can't register input device: %d\n", err);
+ goto out_reg;
+ }
+
+ platform_set_drvdata(pdev, info);
+
+ /* Enable long onkey detection */
+ regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
+ PM800_LONG_ONKEY_EN);
+ /* Set 8-second interval */
+ regmap_update_bits(info->map, PM800_RTC_MISC3,
+ PM800_LONKEY_PRESS_TIME_MASK,
+ PM800_LONKEY_PRESS_TIME);
+
+ device_init_wakeup(&pdev->dev, 1);
+ return 0;
+
+out_reg:
+ input_free_device(info->idev);
+out_irq:
+ pm80x_free_irq(info->pm80x, info->irq, info);
+out:
+ devm_kfree(&pdev->dev, info);
kfree(info);
would update.
+ return err;
+}
+
+static int __devexit pm80x_onkey_remove(struct platform_device *pdev)
+{
+ struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
+
+ input_unregister_device(info->idev);
If interrupt comes here we'll OOPS. You need to free IRQ first.
would update.
+ pm80x_free_irq(info->pm80x, info->irq, info);
+ devm_kfree(&pdev->dev, info);
kfree(info);
would update.
+ return 0;
+}
+
+static struct platform_driver pm80x_onkey_driver = {
+ .driver = {
+ .name = "88pm80x-onkey",
+ .owner = THIS_MODULE,
+ .pm = &pm80x_onkey_pm_ops,
+ },
+ .probe = pm80x_onkey_probe,
+ .remove = __devexit_p(pm80x_onkey_remove),
+};
+
+module_platform_driver(pm80x_onkey_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
+MODULE_AUTHOR("Qiao Zhou <[email protected]>");
+MODULE_ALIAS("platform:88pm80x-onkey");
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7faf4a7..7c0f1ec 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -22,6 +22,16 @@ config INPUT_88PM860X_ONKEY
To compile this driver as a module, choose M here: the module
will be called 88pm860x_onkey.
+config INPUT_88PM80X_ONKEY
+ tristate "88PM80x ONKEY support"
+ depends on MFD_88PM800
+ help
+ Support the ONKEY of Marvell 88PM80x PMICs as an input device
+ reporting power button status.
+
+ To compile this driver as a module, choose M here: the module
+ will be called 88pm80x_onkey.
+
config INPUT_AB8500_PONKEY
tristate "AB8500 Pon (PowerOn) Key"
depends on AB8500_CORE
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index f55cdf4..83fe6f5 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -5,6 +5,7 @@
# Each configuration option enables a list of files.
obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
+obj-$(CONFIG_INPUT_88PM80X_ONKEY) += 88pm80x_onkey.o
obj-$(CONFIG_INPUT_AB8500_PONKEY) += ab8500-ponkey.o
obj-$(CONFIG_INPUT_AD714X) += ad714x.o
obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o
--
1.7.0.4
Thanks!
Dmitry,
thanks a lot for the correction.
--
Best Regards
Qiao
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