From 60dc45119465d086724851d2a5fd09daeb3c515e Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Sun, 10 Jan 2021 18:19:59 -0800
Subject: [PATCH] Input: omap4-keypad - switch to use managed resources
Now that input core supports devres-managed input devices we can clean
up this driver a bit.
Link: https://lore.kernel.org/r/X/qfJKiM21uyksYl@google.com
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/input/keyboard/omap4-keypad.c | 139 ++++++++++----------------
1 file changed, 54 insertions(+), 85 deletions(-)
diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index b17ac2a295b9..55cc4855fb5c 100644
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -252,8 +252,14 @@ static int omap4_keypad_check_revision(struct device *dev,
return 0;
}
+static void omap4_disable_pm(void *d)
+{
+ pm_runtime_disable(d);
+}
+
static int omap4_keypad_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct omap4_keypad *keypad_data;
struct input_dev *input_dev;
struct resource *res;
@@ -271,34 +277,30 @@ static int omap4_keypad_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
- keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
+ keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL);
if (!keypad_data) {
- dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
+ dev_err(dev, "keypad_data memory allocation failed\n");
return -ENOMEM;
}
keypad_data->irq = irq;
- error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
+ error = omap4_keypad_parse_dt(dev, keypad_data);
if (error)
- goto err_free_keypad;
+ return error;
- res = request_mem_region(res->start, resource_size(res), pdev->name);
- if (!res) {
- dev_err(&pdev->dev, "can't request mem region\n");
- error = -EBUSY;
- goto err_free_keypad;
+ keypad_data->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(keypad_data->base))
+ return PTR_ERR(keypad_data->base);
+
+ pm_runtime_enable(dev);
+
+ error = devm_add_action_or_reset(dev, omap4_disable_pm, dev);
+ if (error) {
+ dev_err(dev, "unable to register cleanup action\n");
+ return error;
}
- keypad_data->base = ioremap(res->start, resource_size(res));
- if (!keypad_data->base) {
- dev_err(&pdev->dev, "can't ioremap mem resource\n");
- error = -ENOMEM;
- goto err_release_mem;
- }
-
- pm_runtime_enable(&pdev->dev);
-
/*
* Enable clocks for the keypad module so that we can read
* revision register.
@@ -307,27 +309,25 @@ static int omap4_keypad_probe(struct platform_device *pdev)
if (error) {
dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
pm_runtime_put_noidle(&pdev->dev);
- } else {
- error = omap4_keypad_check_revision(&pdev->dev,
- keypad_data);
- if (!error) {
- /* Ensure device does not raise interrupts */
- omap4_keypad_stop(keypad_data);
- }
- pm_runtime_put_sync(&pdev->dev);
+ return error;
}
+
+ error = omap4_keypad_check_revision(&pdev->dev, keypad_data);
+ if (!error) {
+ /* Ensure device does not raise interrupts */
+ omap4_keypad_stop(keypad_data);
+ }
+
+ pm_runtime_put_sync(&pdev->dev);
if (error)
- goto err_pm_disable;
+ return error;
/* input device allocation */
- keypad_data->input = input_dev = input_allocate_device();
- if (!input_dev) {
- error = -ENOMEM;
- goto err_pm_disable;
- }
+ keypad_data->input = input_dev = devm_input_allocate_device(dev);
+ if (!input_dev)
+ return -ENOMEM;
input_dev->name = pdev->name;
- input_dev->dev.parent = &pdev->dev;
input_dev->id.bustype = BUS_HOST;
input_dev->id.vendor = 0x0001;
input_dev->id.product = 0x0001;
@@ -344,84 +344,53 @@ static int omap4_keypad_probe(struct platform_device *pdev)
keypad_data->row_shift = get_count_order(keypad_data->cols);
max_keys = keypad_data->rows << keypad_data->row_shift;
- keypad_data->keymap = kcalloc(max_keys,
- sizeof(keypad_data->keymap[0]),
- GFP_KERNEL);
+ keypad_data->keymap = devm_kcalloc(dev,
+ max_keys,
+ sizeof(keypad_data->keymap[0]),
+ GFP_KERNEL);
if (!keypad_data->keymap) {
- dev_err(&pdev->dev, "Not enough memory for keymap\n");
- error = -ENOMEM;
- goto err_free_input;
+ dev_err(dev, "Not enough memory for keymap\n");
+ return -ENOMEM;
}
error = matrix_keypad_build_keymap(NULL, NULL,
keypad_data->rows, keypad_data->cols,
keypad_data->keymap, input_dev);
if (error) {
- dev_err(&pdev->dev, "failed to build keymap\n");
- goto err_free_keymap;
+ dev_err(dev, "failed to build keymap\n");
+ return error;
}
- error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
- omap4_keypad_irq_thread_fn, IRQF_ONESHOT,
- "omap4-keypad", keypad_data);
+ error = devm_request_threaded_irq(dev, keypad_data->irq,
+ omap4_keypad_irq_handler,
+ omap4_keypad_irq_thread_fn,
+ IRQF_ONESHOT,
+ "omap4-keypad", keypad_data);
if (error) {
- dev_err(&pdev->dev, "failed to register interrupt\n");
- goto err_free_keymap;
+ dev_err(dev, "failed to register interrupt\n");
+ return error;
}
error = input_register_device(keypad_data->input);
- if (error < 0) {
- dev_err(&pdev->dev, "failed to register input device\n");
- goto err_free_irq;
+ if (error) {
+ dev_err(dev, "failed to register input device\n");
+ return error;
}
- device_init_wakeup(&pdev->dev, true);
- error = dev_pm_set_wake_irq(&pdev->dev, keypad_data->irq);
+ device_init_wakeup(dev, true);
+ error = dev_pm_set_wake_irq(dev, keypad_data->irq);
if (error)
- dev_warn(&pdev->dev,
- "failed to set up wakeup irq: %d\n", error);
+ dev_warn(dev, "failed to set up wakeup irq: %d\n", error);
platform_set_drvdata(pdev, keypad_data);
return 0;
-
-err_free_irq:
- free_irq(keypad_data->irq, keypad_data);
-err_free_keymap:
- kfree(keypad_data->keymap);
-err_free_input:
- input_free_device(input_dev);
-err_pm_disable:
- pm_runtime_disable(&pdev->dev);
- iounmap(keypad_data->base);
-err_release_mem:
- release_mem_region(res->start, resource_size(res));
-err_free_keypad:
- kfree(keypad_data);
- return error;
}
static int omap4_keypad_remove(struct platform_device *pdev)
{
- struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
- struct resource *res;
-
dev_pm_clear_wake_irq(&pdev->dev);
- free_irq(keypad_data->irq, keypad_data);
-
- pm_runtime_disable(&pdev->dev);
-
- input_unregister_device(keypad_data->input);
-
- iounmap(keypad_data->base);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- kfree(keypad_data->keymap);
- kfree(keypad_data);
-
return 0;
}