Input: spear-keyboard - switch to devm_clk_get_prepared()

Use devm_clk_get_prepared() in order to remove a clk_unprepare() in an
error handling path of the probe and from the .remove() function.

This done, the whole .remove() function can also be axed because
'input_dev' is a managed resource allocated with
devm_input_allocate_device() and we can fully rely on devm for cleaning up.

Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/062986b0a5[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/keyboard/spear-keyboard.c

···
 	if (IS_ERR(kbd->io_base))
 		return PTR_ERR(kbd->io_base);
 
-	kbd->clk = devm_clk_get(&pdev->dev, NULL);
+	kbd->clk = devm_clk_get_prepared(&pdev->dev, NULL);
 	if (IS_ERR(kbd->clk))
 		return PTR_ERR(kbd->clk);
 
···
 		return error;
 	}
 
-	error = clk_prepare(kbd->clk);
-	if (error)
-		return error;
-
 	error = input_register_device(input_dev);
 	if (error) {
 		dev_err(&pdev->dev, "Unable to register keyboard device\n");
-		clk_unprepare(kbd->clk);
 		return error;
 	}
 
···
 	platform_set_drvdata(pdev, kbd);
 
 	return 0;
-}
-
-static void spear_kbd_remove(struct platform_device *pdev)
-{
-	struct spear_kbd *kbd = platform_get_drvdata(pdev);
-
-	input_unregister_device(kbd->input);
-	clk_unprepare(kbd->clk);
 }
 
 static int spear_kbd_suspend(struct device *dev)
···
 
 static struct platform_driver spear_kbd_driver = {
 	.probe		= spear_kbd_probe,
-	.remove_new	= spear_kbd_remove,
 	.driver		= {
 		.name	= "keyboard",
 		.pm	= pm_sleep_ptr(&spear_kbd_pm_ops),