linux-imx

// SPDX-License-Identifier: GPL-2.0+

/* pdt.c: OF PROM device tree support code.

 *

 * Paul Mackerras   August 1996.

 * Copyright (C) 1996-2005 Paul Mackerras.

 *

 *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.

 *    {engebret|bergner}@us.ibm.com

 *

 *  Adapted for sparc by David S. Miller davem@davemloft.net

 *  Adapted for multiple architectures by Andres Salomon <dilinger@queued.net>

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/errno.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/of_pdt.h>

​

static struct of_pdt_ops *of_pdt_prom_ops __initdata;

​

#if defined(CONFIG_SPARC)

unsigned int of_pdt_unique_id __initdata;

​

#define of_pdt_incr_unique_id(p) do { \

    (p)->unique_id = of_pdt_unique_id++; \

} while (0)

​

static char * __init of_pdt_build_full_name(struct device_node *dp)

{

    return build_path_component(dp);

}

​

#else /* CONFIG_SPARC */

​

static inline void of_pdt_incr_unique_id(void *p) { }

static inline void irq_trans_init(struct device_node *dp) { }

​

static char * __init of_pdt_build_full_name(struct device_node *dp)

{

    static int failsafe_id = 0; /* for generating unique names on failure */

    const char *name;

    char path[256];

    char *buf;

    int len;

​

    if (!of_pdt_prom_ops->pkg2path(dp->phandle, path, sizeof(path), &len)) {

        name = kbasename(path);

        buf = prom_early_alloc(strlen(name) + 1);

        strcpy(buf, name);

        return buf;

    }

​

    name = of_get_property(dp, "name", &len);

    buf = prom_early_alloc(len + 16);

    sprintf(buf, "%s@unknown%i", name, failsafe_id++);

    pr_err("%s: pkg2path failed; assigning %s\n", __func__, buf);

    return buf;

}

​

#endif /* !CONFIG_SPARC */