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Diffstat (limited to 'kernel/drivers/leds/leds-gpio-register.c')
-rw-r--r--kernel/drivers/leds/leds-gpio-register.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/drivers/leds/leds-gpio-register.c b/kernel/drivers/leds/leds-gpio-register.c
new file mode 100644
index 000000000..75717ba68
--- /dev/null
+++ b/kernel/drivers/leds/leds-gpio-register.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2011 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/**
+ * gpio_led_register_device - register a gpio-led device
+ * @pdata: the platform data used for the new device
+ *
+ * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
+ * with the result. This allows to have pdata and pdata-leds in .init.rodata
+ * and so saves some bytes compared to a static struct platform_device with
+ * static platform data.
+ *
+ * Returns the registered device or an error pointer.
+ */
+struct platform_device *__init gpio_led_register_device(
+ int id, const struct gpio_led_platform_data *pdata)
+{
+ struct platform_device *ret;
+ struct gpio_led_platform_data _pdata = *pdata;
+
+ if (!pdata->num_leds)
+ return ERR_PTR(-EINVAL);
+
+ _pdata.leds = kmemdup(pdata->leds,
+ pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
+ if (!_pdata.leds)
+ return ERR_PTR(-ENOMEM);
+
+ ret = platform_device_register_resndata(NULL, "leds-gpio", id,
+ NULL, 0, &_pdata, sizeof(_pdata));
+ if (IS_ERR(ret))
+ kfree(_pdata.leds);
+
+ return ret;
+}