/*
 * (C) Copyright 2007
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <stdio_dev.h>
#include <linux/ctype.h>
#include <linux/types.h>
#include <asm/global_data.h>
#include <fdt.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <exports.h>

/*
 * Global data (for the gd->bd)
 */
DECLARE_GLOBAL_DATA_PTR;

/**
 * fdt_getprop_u32_default - Find a node and return it's property or a default
 *
 * @fdt: ptr to device tree
 * @path: path of node
 * @prop: property name
 * @dflt: default value if the property isn't found
 *
 * Convenience function to find a node and return it's property or a
 * default value if it doesn't exist.
 */
u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop,
                                const u32 dflt)
{
        const u32 *val;
        int off;

        off = fdt_path_offset(fdt, path);
        if (off < 0)
                return dflt;

        val = fdt_getprop(fdt, off, prop, NULL);
        if (val)
                return *val;
        else
                return dflt;
}

/**
 * fdt_find_and_setprop: Find a node and set it's property
 *
 * @fdt: ptr to device tree
 * @node: path of node
 * @prop: property name
 * @val: ptr to new value
 * @len: length of new property value
 * @create: flag to create the property if it doesn't exist
 *
 * Convenience function to directly set a property given the path to the node.
 */
int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
                         const void *val, int len, int create)
{
        int nodeoff = fdt_path_offset(fdt, node);

        if (nodeoff < 0)
                return nodeoff;

        if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
                return 0; /* create flag not set; so exit quietly */

        return fdt_setprop(fdt, nodeoff, prop, val, len);
}

#ifdef CONFIG_OF_STDOUT_VIA_ALIAS

#ifdef CONFIG_SERIAL_MULTI
static void fdt_fill_multisername(char *sername, size_t maxlen)
{
        const char *outname = stdio_devices[stdout]->name;

        if (strcmp(outname, "serial") > 0)
                strncpy(sername, outname, maxlen);

        /* eserial? */
        if (strcmp(outname + 1, "serial") > 0)
                strncpy(sername, outname + 1, maxlen);
}
#else
static inline void fdt_fill_multisername(char *sername, size_t maxlen) {}
#endif /* CONFIG_SERIAL_MULTI */

static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
        int err = 0;
#ifdef CONFIG_CONS_INDEX
        int node;
        char sername[9] = { 0 };
        const char *path;

        fdt_fill_multisername(sername, sizeof(sername) - 1);
        if (!sername[0])
                sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);

        err = node = fdt_path_offset(fdt, "/aliases");
        if (node >= 0) {
                int len;
                path = fdt_getprop(fdt, node, sername, &len);
                if (path) {
                        char *p = malloc(len);
                        err = -FDT_ERR_NOSPACE;
                        if (p) {
                                memcpy(p, path, len);
                                err = fdt_setprop(fdt, chosenoff,
                                        "linux,stdout-path", p, len);
                                free(p);
                        }
                } else {
                        err = len;
                }
        }
#endif
        if (err < 0)
                printf("WARNING: could not set linux,stdout-path %s.\n",
                                fdt_strerror(err));

        return err;
}
#endif

int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
{
        int   nodeoffset;
        int   err, j, total;
        u32   tmp;
        const char *path;
        uint64_t addr, size;

        /* Find the "chosen" node.  */
        nodeoffset = fdt_path_offset (fdt, "/chosen");

        /* If there is no "chosen" node in the blob return */
        if (nodeoffset < 0) {
                printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
                return nodeoffset;
        }

        /* just return if initrd_start/end aren't valid */
        if ((initrd_start == 0) || (initrd_end == 0))
                return 0;

        total = fdt_num_mem_rsv(fdt);

        /*
         * Look for an existing entry and update it.  If we don't find
         * the entry, we will j be the next available slot.
         */
        for (j = 0; j < total; j++) {
                err = fdt_get_mem_rsv(fdt, j, &addr, &size);
                if (addr == initrd_start) {
                        fdt_del_mem_rsv(fdt, j);
                        break;
                }
        }

        err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start + 1);
        if (err < 0) {
                printf("fdt_initrd: %s\n", fdt_strerror(err));
                return err;
        }

        path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
        if ((path == NULL) || force) {
                tmp = __cpu_to_be32(initrd_start);
                err = fdt_setprop(fdt, nodeoffset,
                        "linux,initrd-start", &tmp, sizeof(tmp));
                if (err < 0) {
                        printf("WARNING: "
                                "could not set linux,initrd-start %s.\n",
                                fdt_strerror(err));
                        return err;
                }
                tmp = __cpu_to_be32(initrd_end);
                err = fdt_setprop(fdt, nodeoffset,
                        "linux,initrd-end", &tmp, sizeof(tmp));
                if (err < 0) {
                        printf("WARNING: could not set linux,initrd-end %s.\n",
                                fdt_strerror(err));

                        return err;
                }
        }

        return 0;
}

int fdt_chosen(void *fdt, int force)
{
        int   nodeoffset;
        int   err;
        char  *str;             /* used to set string properties */
        const char *path;

        err = fdt_check_header(fdt);
        if (err < 0) {
                printf("fdt_chosen: %s\n", fdt_strerror(err));
                return err;
        }

        /*
         * Find the "chosen" node.
         */
        nodeoffset = fdt_path_offset (fdt, "/chosen");

        /*
         * If there is no "chosen" node in the blob, create it.
         */
        if (nodeoffset < 0) {
                /*
                 * Create a new node "/chosen" (offset 0 is root level)
                 */
                nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
                if (nodeoffset < 0) {
                        printf("WARNING: could not create /chosen %s.\n",
                                fdt_strerror(nodeoffset));
                        return nodeoffset;
                }
        }

        /*
         * Create /chosen properites that don't exist in the fdt.
         * If the property exists, update it only if the "force" parameter
         * is true.
         */
        str = getenv("bootargs");
        if (str != NULL) {
                path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
                if ((path == NULL) || force) {
                        err = fdt_setprop(fdt, nodeoffset,
                                "bootargs", str, strlen(str)+1);
                        if (err < 0)
                                printf("WARNING: could not set bootargs %s.\n",
                                        fdt_strerror(err));
                }
        }

#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
        path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
        if ((path == NULL) || force)
                err = fdt_fixup_stdout(fdt, nodeoffset);
#endif

#ifdef OF_STDOUT_PATH
        path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
        if ((path == NULL) || force) {
                err = fdt_setprop(fdt, nodeoffset,
                        "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
                if (err < 0)
                        printf("WARNING: could not set linux,stdout-path %s.\n",
                                fdt_strerror(err));
        }
#endif

        return err;
}

void do_fixup_by_path(void *fdt, const char *path, const char *prop,
                      const void *val, int len, int create)
{
#if defined(DEBUG)
        int i;
        debug("Updating property '%s/%s' = ", path, prop);
        for (i = 0; i < len; i++)
                debug(" %.2x", *(u8*)(val+i));
        debug("\n");
#endif
        int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
        if (rc)
                printf("Unable to update property %s:%s, err=%s\n",
                        path, prop, fdt_strerror(rc));
}

void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
                          u32 val, int create)
{
        val = cpu_to_fdt32(val);
        do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
}

void do_fixup_by_prop(void *fdt,
                      const char *pname, const void *pval, int plen,
                      const char *prop, const void *val, int len,
                      int create)
{
        int off;
#if defined(DEBUG)
        int i;
        debug("Updating property '%s' = ", prop);
        for (i = 0; i < len; i++)
                debug(" %.2x", *(u8*)(val+i));
        debug("\n");
#endif
        off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
        while (off != -FDT_ERR_NOTFOUND) {
                if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
                        fdt_setprop(fdt, off, prop, val, len);
                off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
        }
}

void do_fixup_by_prop_u32(void *fdt,
                          const char *pname, const void *pval, int plen,
                          const char *prop, u32 val, int create)
{
        val = cpu_to_fdt32(val);
        do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
}

void do_fixup_by_compat(void *fdt, const char *compat,
                        const char *prop, const void *val, int len, int create)
{
        int off = -1;
#if defined(DEBUG)
        int i;
        debug("Updating property '%s' = ", prop);
        for (i = 0; i < len; i++)
                debug(" %.2x", *(u8*)(val+i));
        debug("\n");
#endif
        off = fdt_node_offset_by_compatible(fdt, -1, compat);
        while (off != -FDT_ERR_NOTFOUND) {
                if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
                        fdt_setprop(fdt, off, prop, val, len);
                off = fdt_node_offset_by_compatible(fdt, off, compat);
        }
}

void do_fixup_by_compat_u32(void *fdt, const char *compat,
                            const char *prop, u32 val, int create)
{
        val = cpu_to_fdt32(val);
        do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
}

int fdt_fixup_memory(void *blob, u64 start, u64 size)
{
        int err, nodeoffset, len = 0;
        u8 tmp[16];
        const u32 *addrcell, *sizecell;

        err = fdt_check_header(blob);
        if (err < 0) {
                printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
                return err;
        }

        /* update, or add and update /memory node */
        nodeoffset = fdt_path_offset(blob, "/memory");
        if (nodeoffset < 0) {
                nodeoffset = fdt_add_subnode(blob, 0, "memory");
                if (nodeoffset < 0)
                        printf("WARNING: could not create /memory: %s.\n",
                                        fdt_strerror(nodeoffset));
                return nodeoffset;
        }
        err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
                        sizeof("memory"));
        if (err < 0) {
                printf("WARNING: could not set %s %s.\n", "device_type",
                                fdt_strerror(err));
                return err;
        }

        addrcell = fdt_getprop(blob, 0, "#address-cells", NULL);
        /* use shifts and mask to ensure endianness */
        if ((addrcell) && (*addrcell == 2)) {
                tmp[0] = (start >> 56) & 0xff;
                tmp[1] = (start >> 48) & 0xff;
                tmp[2] = (start >> 40) & 0xff;
                tmp[3] = (start >> 32) & 0xff;
                tmp[4] = (start >> 24) & 0xff;
                tmp[5] = (start >> 16) & 0xff;
                tmp[6] = (start >>  8) & 0xff;
                tmp[7] = (start      ) & 0xff;
                len = 8;
        } else {
                tmp[0] = (start >> 24) & 0xff;
                tmp[1] = (start >> 16) & 0xff;
                tmp[2] = (start >>  8) & 0xff;
                tmp[3] = (start      ) & 0xff;
                len = 4;
        }

        sizecell = fdt_getprop(blob, 0, "#size-cells", NULL);
        /* use shifts and mask to ensure endianness */
        if ((sizecell) && (*sizecell == 2)) {
                tmp[0+len] = (size >> 56) & 0xff;
                tmp[1+len] = (size >> 48) & 0xff;
                tmp[2+len] = (size >> 40) & 0xff;
                tmp[3+len] = (size >> 32) & 0xff;
                tmp[4+len] = (size >> 24) & 0xff;
                tmp[5+len] = (size >> 16) & 0xff;
                tmp[6+len] = (size >>  8) & 0xff;
                tmp[7+len] = (size      ) & 0xff;
                len += 8;
        } else {
                tmp[0+len] = (size >> 24) & 0xff;
                tmp[1+len] = (size >> 16) & 0xff;
                tmp[2+len] = (size >>  8) & 0xff;
                tmp[3+len] = (size      ) & 0xff;
                len += 4;
        }

        err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
        if (err < 0) {
                printf("WARNING: could not set %s %s.\n",
                                "reg", fdt_strerror(err));
                return err;
        }
        return 0;
}

void fdt_fixup_ethernet(void *fdt)
{
        int node, i, j;
        char enet[16], *tmp, *end;
        char mac[16] = "ethaddr";
        const char *path;
        unsigned char mac_addr[6];

        node = fdt_path_offset(fdt, "/aliases");
        if (node < 0)
                return;

        i = 0;
        while ((tmp = getenv(mac)) != NULL) {
                sprintf(enet, "ethernet%d", i);
                path = fdt_getprop(fdt, node, enet, NULL);
                if (!path) {
                        debug("No alias for %s\n", enet);
                        sprintf(mac, "eth%daddr", ++i);
                        continue;
                }

                for (j = 0; j < 6; j++) {
                        mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
                        if (tmp)
                                tmp = (*end) ? end+1 : end;
                }

                do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
                do_fixup_by_path(fdt, path, "local-mac-address",
                                &mac_addr, 6, 1);

                sprintf(mac, "eth%daddr", ++i);
        }
}

#ifdef CONFIG_HAS_FSL_DR_USB
void fdt_fixup_dr_usb(void *blob, bd_t *bd)
{
        char *mode;
        char *type;
        const char *compat = "fsl-usb2-dr";
        const char *prop_mode = "dr_mode";
        const char *prop_type = "phy_type";
        int node_offset;
        int err;

        mode = getenv("usb_dr_mode");
        type = getenv("usb_phy_type");
        if (!mode && !type)
                return;

        node_offset = fdt_node_offset_by_compatible(blob, 0, compat);
        if (node_offset < 0) {
                printf("WARNING: could not find compatible node %s: %s.\n",
                        compat, fdt_strerror(node_offset));
                return;
        }

        if (mode) {
                err = fdt_setprop(blob, node_offset, prop_mode, mode,
                                  strlen(mode) + 1);
                if (err < 0)
                        printf("WARNING: could not set %s for %s: %s.\n",
                               prop_mode, compat, fdt_strerror(err));
        }

        if (type) {
                err = fdt_setprop(blob, node_offset, prop_type, type,
                                  strlen(type) + 1);
                if (err < 0)
                        printf("WARNING: could not set %s for %s: %s.\n",
                               prop_type, compat, fdt_strerror(err));
        }
}
#endif /* CONFIG_HAS_FSL_DR_USB */

#if defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx)
/*
 * update crypto node properties to a specified revision of the SEC
 * called with sec_rev == 0 if not on an mpc8xxxE processor
 */
void fdt_fixup_crypto_node(void *blob, int sec_rev)
{
        const struct sec_rev_prop {
                u32 sec_rev;
                u32 num_channels;
                u32 channel_fifo_len;
                u32 exec_units_mask;
                u32 descriptor_types_mask;
        } sec_rev_prop_list [] = {
                { 0x0200, 4, 24, 0x07e, 0x01010ebf }, /* SEC 2.0 */
                { 0x0201, 4, 24, 0x0fe, 0x012b0ebf }, /* SEC 2.1 */
                { 0x0202, 1, 24, 0x04c, 0x0122003f }, /* SEC 2.2 */
                { 0x0204, 4, 24, 0x07e, 0x012b0ebf }, /* SEC 2.4 */
                { 0x0300, 4, 24, 0x9fe, 0x03ab0ebf }, /* SEC 3.0 */
                { 0x0303, 4, 24, 0x97c, 0x03ab0abf }, /* SEC 3.3 */
        };
        char compat_strlist[ARRAY_SIZE(sec_rev_prop_list) *
                            sizeof("fsl,secX.Y")];
        int crypto_node, sec_idx, err;
        char *p;
        u32 val;

        /* locate crypto node based on lowest common compatible */
        crypto_node = fdt_node_offset_by_compatible(blob, -1, "fsl,sec2.0");
        if (crypto_node == -FDT_ERR_NOTFOUND)
                return;

        /* delete it if not on an E-processor */
        if (crypto_node > 0 && !sec_rev) {
                fdt_del_node(blob, crypto_node);
                return;
        }

        /* else we got called for possible uprev */
        for (sec_idx = 0; sec_idx < ARRAY_SIZE(sec_rev_prop_list); sec_idx++)
                if (sec_rev_prop_list[sec_idx].sec_rev == sec_rev)
                        break;

        if (sec_idx == ARRAY_SIZE(sec_rev_prop_list)) {
                puts("warning: unknown SEC revision number\n");
                return;
        }

        val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].num_channels);
        err = fdt_setprop(blob, crypto_node, "fsl,num-channels", &val, 4);
        if (err < 0)
                printf("WARNING: could not set crypto property: %s\n",
                       fdt_strerror(err));

        val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].descriptor_types_mask);
        err = fdt_setprop(blob, crypto_node, "fsl,descriptor-types-mask", &val, 4);
        if (err < 0)
                printf("WARNING: could not set crypto property: %s\n",
                       fdt_strerror(err));

        val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].exec_units_mask);
        err = fdt_setprop(blob, crypto_node, "fsl,exec-units-mask", &val, 4);
        if (err < 0)
                printf("WARNING: could not set crypto property: %s\n",
                       fdt_strerror(err));

        val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].channel_fifo_len);
        err = fdt_setprop(blob, crypto_node, "fsl,channel-fifo-len", &val, 4);
        if (err < 0)
                printf("WARNING: could not set crypto property: %s\n",
                       fdt_strerror(err));

        val = 0;
        while (sec_idx >= 0) {
                p = compat_strlist + val;
                val += sprintf(p, "fsl,sec%d.%d",
                        (sec_rev_prop_list[sec_idx].sec_rev & 0xff00) >> 8,
                        sec_rev_prop_list[sec_idx].sec_rev & 0x00ff) + 1;
                sec_idx--;
        }
        err = fdt_setprop(blob, crypto_node, "compatible", &compat_strlist, val);
        if (err < 0)
                printf("WARNING: could not set crypto property: %s\n",
                       fdt_strerror(err));
}
#endif /* defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) */

/* Resize the fdt to its actual size + a bit of padding */
int fdt_resize(void *blob)
{
        int i;
        uint64_t addr, size;
        int total, ret;
        uint actualsize;

        if (!blob)
                return 0;

        total = fdt_num_mem_rsv(blob);
        for (i = 0; i < total; i++) {
                fdt_get_mem_rsv(blob, i, &addr, &size);
                if (addr == (uint64_t)(u32)blob) {
                        fdt_del_mem_rsv(blob, i);
                        break;
                }
        }

        /*
         * Calculate the actual size of the fdt
         * plus the size needed for two fdt_add_mem_rsv, one
         * for the fdt itself and one for a possible initrd
         */
        actualsize = fdt_off_dt_strings(blob) +
                fdt_size_dt_strings(blob) + 2*sizeof(struct fdt_reserve_entry);

        /* Make it so the fdt ends on a page boundary */
        actualsize = ALIGN(actualsize + ((uint)blob & 0xfff), 0x1000);
        actualsize = actualsize - ((uint)blob & 0xfff);

        /* Change the fdt header to reflect the correct size */
        fdt_set_totalsize(blob, actualsize);

        /* Add the new reservation */
        ret = fdt_add_mem_rsv(blob, (uint)blob, actualsize);
        if (ret < 0)
                return ret;

        return actualsize;
}

#ifdef CONFIG_PCI
#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4

#define FDT_PCI_PREFETCH        (0x40000000)
#define FDT_PCI_MEM32           (0x02000000)
#define FDT_PCI_IO              (0x01000000)
#define FDT_PCI_MEM64           (0x03000000)

int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {

        int addrcell, sizecell, len, r;
        u32 *dma_range;
        /* sized based on pci addr cells, size-cells, & address-cells */
        u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];

        addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
        sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);

        dma_range = &dma_ranges[0];
        for (r = 0; r < hose->region_count; r++) {
                u64 bus_start, phys_start, size;

                /* skip if !PCI_REGION_SYS_MEMORY */
                if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
                        continue;

                bus_start = (u64)hose->regions[r].bus_start;
                phys_start = (u64)hose->regions[r].phys_start;
                size = (u64)hose->regions[r].size;

                dma_range[0] = 0;
                if (size >= 0x100000000ull)
                        dma_range[0] |= FDT_PCI_MEM64;
                else
                        dma_range[0] |= FDT_PCI_MEM32;
                if (hose->regions[r].flags & PCI_REGION_PREFETCH)
                        dma_range[0] |= FDT_PCI_PREFETCH;
#ifdef CONFIG_SYS_PCI_64BIT
                dma_range[1] = bus_start >> 32;
#else
                dma_range[1] = 0;
#endif
                dma_range[2] = bus_start & 0xffffffff;

                if (addrcell == 2) {
                        dma_range[3] = phys_start >> 32;
                        dma_range[4] = phys_start & 0xffffffff;
                } else {
                        dma_range[3] = phys_start & 0xffffffff;
                }

                if (sizecell == 2) {
                        dma_range[3 + addrcell + 0] = size >> 32;
                        dma_range[3 + addrcell + 1] = size & 0xffffffff;
                } else {
                        dma_range[3 + addrcell + 0] = size & 0xffffffff;
                }

                dma_range += (3 + addrcell + sizecell);
        }

        len = dma_range - &dma_ranges[0];
        if (len)
                fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);

        return 0;
}
#endif

#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
/*
 * This function can be used to update the size in the "reg" property
 * of the NOR FLASH device nodes. This is necessary for boards with
 * non-fixed NOR FLASH sizes.
 */
int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size)
{
        char compat[][16] = { "cfi-flash", "jedec-flash" };
        int off;
        int len;
        struct fdt_property *prop;
        u32 *reg;
        int i;

        for (i = 0; i < 2; i++) {
                off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
                while (off != -FDT_ERR_NOTFOUND) {
                        /*
                         * Found one compatible node, now check if this one
                         * has the correct CS
                         */
                        prop = fdt_get_property_w(blob, off, "reg", &len);
                        if (prop) {
                                reg = (u32 *)&prop->data[0];
                                if (reg[0] == cs) {
                                        reg[2] = size;
                                        fdt_setprop(blob, off, "reg", reg,
                                                    3 * sizeof(u32));

                                        return 0;
                                }
                        }

                        /* Move to next compatible node */
                        off = fdt_node_offset_by_compatible(blob, off,
                                                            compat[i]);
                }
        }

        return -1;
}
#endif