[people/ms/u-boot.git] / lib / fdtdec.c

/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef USE_HOSTCC
#include <common.h>
#include <serial.h>
#include <libfdt.h>
#include <fdtdec.h>

#include <asm/gpio.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * Here are the type we know about. One day we might allow drivers to
 * register. For now we just put them here. The COMPAT macro allows us to
 * turn this into a sparse list later, and keeps the ID with the name.
 */
#define COMPAT(id, name) name
static const char * const compat_names[COMPAT_COUNT] = {
	COMPAT(UNKNOWN, "<none>"),
	COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
	COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
	COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
	COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"),
	COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
	COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
	COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
	COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
	COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
	COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
	COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
	COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
	COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
	COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
	COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
	COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
	COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
	COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
	COMPAT(SMSC_LAN9215, "smsc,lan9215"),
	COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
	COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
	COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
	COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
	COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
	COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
	COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
	COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
	COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
	COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
	COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
	COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
	COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
	COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
	COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
	COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
	COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
	COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
	COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
	COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
	COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
	COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
	COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"),
	COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
};

const char *fdtdec_get_compatible(enum fdt_compat_id id)
{
	/* We allow reading of the 'unknown' ID for testing purposes */
	assert(id >= 0 && id < COMPAT_COUNT);
	return compat_names[id];
}

fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
		const char *prop_name, fdt_size_t *sizep)
{
	const fdt_addr_t *cell;
	int len;

	debug("%s: %s: ", __func__, prop_name);
	cell = fdt_getprop(blob, node, prop_name, &len);
	if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
		     len == sizeof(fdt_addr_t) * 2)) {
		fdt_addr_t addr = fdt_addr_to_cpu(*cell);
		if (sizep) {
			const fdt_size_t *size;

			size = (fdt_size_t *)((char *)cell +
					sizeof(fdt_addr_t));
			*sizep = fdt_size_to_cpu(*size);
			debug("addr=%08lx, size=%08x\n",
			      (ulong)addr, *sizep);
		} else {
			debug("%08lx\n", (ulong)addr);
		}
		return addr;
	}
	debug("(not found)\n");
	return FDT_ADDR_T_NONE;
}

fdt_addr_t fdtdec_get_addr(const void *blob, int node,
		const char *prop_name)
{
	return fdtdec_get_addr_size(blob, node, prop_name, NULL);
}

s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
		s32 default_val)
{
	const s32 *cell;
	int len;

	debug("%s: %s: ", __func__, prop_name);
	cell = fdt_getprop(blob, node, prop_name, &len);
	if (cell && len >= sizeof(s32)) {
		s32 val = fdt32_to_cpu(cell[0]);

		debug("%#x (%d)\n", val, val);
		return val;
	}
	debug("(not found)\n");
	return default_val;
}

uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
		uint64_t default_val)
{
	const uint64_t *cell64;
	int length;

	cell64 = fdt_getprop(blob, node, prop_name, &length);
	if (!cell64 || length < sizeof(*cell64))
		return default_val;

	return fdt64_to_cpu(*cell64);
}

int fdtdec_get_is_enabled(const void *blob, int node)
{
	const char *cell;

	/*
	 * It should say "okay", so only allow that. Some fdts use "ok" but
	 * this is a bug. Please fix your device tree source file. See here
	 * for discussion:
	 *
	 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
	 */
	cell = fdt_getprop(blob, node, "status", NULL);
	if (cell)
		return 0 == strcmp(cell, "okay");
	return 1;
}

enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
{
	enum fdt_compat_id id;

	/* Search our drivers */
	for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
		if (0 == fdt_node_check_compatible(blob, node,
				compat_names[id]))
			return id;
	return COMPAT_UNKNOWN;
}

int fdtdec_next_compatible(const void *blob, int node,
		enum fdt_compat_id id)
{
	return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
}

int fdtdec_next_compatible_subnode(const void *blob, int node,
		enum fdt_compat_id id, int *depthp)
{
	do {
		node = fdt_next_node(blob, node, depthp);
	} while (*depthp > 1);

	/* If this is a direct subnode, and compatible, return it */
	if (*depthp == 1 && 0 == fdt_node_check_compatible(
						blob, node, compat_names[id]))
		return node;

	return -FDT_ERR_NOTFOUND;
}

int fdtdec_next_alias(const void *blob, const char *name,
		enum fdt_compat_id id, int *upto)
{
#define MAX_STR_LEN 20
	char str[MAX_STR_LEN + 20];
	int node, err;

	/* snprintf() is not available */
	assert(strlen(name) < MAX_STR_LEN);
	sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
	node = fdt_path_offset(blob, str);
	if (node < 0)
		return node;
	err = fdt_node_check_compatible(blob, node, compat_names[id]);
	if (err < 0)
		return err;
	if (err)
		return -FDT_ERR_NOTFOUND;
	(*upto)++;
	return node;
}

int fdtdec_find_aliases_for_id(const void *blob, const char *name,
			enum fdt_compat_id id, int *node_list, int maxcount)
{
	memset(node_list, '\0', sizeof(*node_list) * maxcount);

	return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
}

/* TODO: Can we tighten this code up a little? */
int fdtdec_add_aliases_for_id(const void *blob, const char *name,
			enum fdt_compat_id id, int *node_list, int maxcount)
{
	int name_len = strlen(name);
	int nodes[maxcount];
	int num_found = 0;
	int offset, node;
	int alias_node;
	int count;
	int i, j;

	/* find the alias node if present */
	alias_node = fdt_path_offset(blob, "/aliases");

	/*
	 * start with nothing, and we can assume that the root node can't
	 * match
	 */
	memset(nodes, '\0', sizeof(nodes));

	/* First find all the compatible nodes */
	for (node = count = 0; node >= 0 && count < maxcount;) {
		node = fdtdec_next_compatible(blob, node, id);
		if (node >= 0)
			nodes[count++] = node;
	}
	if (node >= 0)
		debug("%s: warning: maxcount exceeded with alias '%s'\n",
		       __func__, name);

	/* Now find all the aliases */
	for (offset = fdt_first_property_offset(blob, alias_node);
			offset > 0;
			offset = fdt_next_property_offset(blob, offset)) {
		const struct fdt_property *prop;
		const char *path;
		int number;
		int found;

		node = 0;
		prop = fdt_get_property_by_offset(blob, offset, NULL);
		path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
		if (prop->len && 0 == strncmp(path, name, name_len))
			node = fdt_path_offset(blob, prop->data);
		if (node <= 0)
			continue;

		/* Get the alias number */
		number = simple_strtoul(path + name_len, NULL, 10);
		if (number < 0 || number >= maxcount) {
			debug("%s: warning: alias '%s' is out of range\n",
			       __func__, path);
			continue;
		}

		/* Make sure the node we found is actually in our list! */
		found = -1;
		for (j = 0; j < count; j++)
			if (nodes[j] == node) {
				found = j;
				break;
			}

		if (found == -1) {
			debug("%s: warning: alias '%s' points to a node "
				"'%s' that is missing or is not compatible "
				" with '%s'\n", __func__, path,
				fdt_get_name(blob, node, NULL),
			       compat_names[id]);
			continue;
		}

		/*
		 * Add this node to our list in the right place, and mark
		 * it as done.
		 */
		if (fdtdec_get_is_enabled(blob, node)) {
			if (node_list[number]) {
				debug("%s: warning: alias '%s' requires that "
				      "a node be placed in the list in a "
				      "position which is already filled by "
				      "node '%s'\n", __func__, path,
				      fdt_get_name(blob, node, NULL));
				continue;
			}
			node_list[number] = node;
			if (number >= num_found)
				num_found = number + 1;
		}
		nodes[found] = 0;
	}

	/* Add any nodes not mentioned by an alias */
	for (i = j = 0; i < maxcount; i++) {
		if (!node_list[i]) {
			for (; j < maxcount; j++)
				if (nodes[j] &&
					fdtdec_get_is_enabled(blob, nodes[j]))
					break;

			/* Have we run out of nodes to add? */
			if (j == maxcount)
				break;

			assert(!node_list[i]);
			node_list[i] = nodes[j++];
			if (i >= num_found)
				num_found = i + 1;
		}
	}

	return num_found;
}

int fdtdec_check_fdt(void)
{
	/*
	 * We must have an FDT, but we cannot panic() yet since the console
	 * is not ready. So for now, just assert(). Boards which need an early
	 * FDT (prior to console ready) will need to make their own
	 * arrangements and do their own checks.
	 */
	assert(!fdtdec_prepare_fdt());
	return 0;
}

/*
 * This function is a little odd in that it accesses global data. At some
 * point if the architecture board.c files merge this will make more sense.
 * Even now, it is common code.
 */
int fdtdec_prepare_fdt(void)
{
	if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
	    fdt_check_header(gd->fdt_blob)) {
		printf("No valid FDT found - please append one to U-Boot "
			"binary, use u-boot-dtb.bin or define "
			"CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
		return -1;
	}
	return 0;
}

int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
{
	const u32 *phandle;
	int lookup;

	debug("%s: %s\n", __func__, prop_name);
	phandle = fdt_getprop(blob, node, prop_name, NULL);
	if (!phandle)
		return -FDT_ERR_NOTFOUND;

	lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
	return lookup;
}

/**
 * Look up a property in a node and check that it has a minimum length.
 *
 * @param blob		FDT blob
 * @param node		node to examine
 * @param prop_name	name of property to find
 * @param min_len	minimum property length in bytes
 * @param err		0 if ok, or -FDT_ERR_NOTFOUND if the property is not
			found, or -FDT_ERR_BADLAYOUT if not enough data
 * @return pointer to cell, which is only valid if err == 0
 */
static const void *get_prop_check_min_len(const void *blob, int node,
		const char *prop_name, int min_len, int *err)
{
	const void *cell;
	int len;

	debug("%s: %s\n", __func__, prop_name);
	cell = fdt_getprop(blob, node, prop_name, &len);
	if (!cell)
		*err = -FDT_ERR_NOTFOUND;
	else if (len < min_len)
		*err = -FDT_ERR_BADLAYOUT;
	else
		*err = 0;
	return cell;
}

int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
		u32 *array, int count)
{
	const u32 *cell;
	int i, err = 0;

	debug("%s: %s\n", __func__, prop_name);
	cell = get_prop_check_min_len(blob, node, prop_name,
				      sizeof(u32) * count, &err);
	if (!err) {
		for (i = 0; i < count; i++)
			array[i] = fdt32_to_cpu(cell[i]);
	}
	return err;
}

const u32 *fdtdec_locate_array(const void *blob, int node,
			       const char *prop_name, int count)
{
	const u32 *cell;
	int err;

	cell = get_prop_check_min_len(blob, node, prop_name,
				      sizeof(u32) * count, &err);
	return err ? NULL : cell;
}

int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
{
	const s32 *cell;
	int len;

	debug("%s: %s\n", __func__, prop_name);
	cell = fdt_getprop(blob, node, prop_name, &len);
	return cell != NULL;
}

/**
 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
 * terminating item.
 *
 * @param blob		FDT blob to use
 * @param node		Node to look at
 * @param prop_name	Node property name
 * @param gpio		Array of gpio elements to fill from FDT. This will be
 *			untouched if either 0 or an error is returned
 * @param max_count	Maximum number of elements allowed
 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
 */
int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
		struct fdt_gpio_state *gpio, int max_count)
{
	const struct fdt_property *prop;
	const u32 *cell;
	const char *name;
	int len, i;

	debug("%s: %s\n", __func__, prop_name);
	assert(max_count > 0);
	prop = fdt_get_property(blob, node, prop_name, &len);
	if (!prop) {
		debug("%s: property '%s' missing\n", __func__, prop_name);
		return -FDT_ERR_NOTFOUND;
	}

	/* We will use the name to tag the GPIO */
	name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
	cell = (u32 *)prop->data;
	len /= sizeof(u32) * 3;		/* 3 cells per GPIO record */
	if (len > max_count) {
		debug(" %s: too many GPIOs / cells for "
			"property '%s'\n", __func__, prop_name);
		return -FDT_ERR_BADLAYOUT;
	}

	/* Read out the GPIO data from the cells */
	for (i = 0; i < len; i++, cell += 3) {
		gpio[i].gpio = fdt32_to_cpu(cell[1]);
		gpio[i].flags = fdt32_to_cpu(cell[2]);
		gpio[i].name = name;
	}

	return len;
}

int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
		struct fdt_gpio_state *gpio)
{
	int err;

	debug("%s: %s\n", __func__, prop_name);
	gpio->gpio = FDT_GPIO_NONE;
	gpio->name = NULL;
	err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
	return err == 1 ? 0 : err;
}

int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
{
	int val;

	if (!fdt_gpio_isvalid(gpio))
		return -1;

	val = gpio_get_value(gpio->gpio);
	return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
}

int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
{
	if (!fdt_gpio_isvalid(gpio))
		return -1;

	val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
	return gpio_set_value(gpio->gpio, val);
}

int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
{
	/*
	 * Return success if there is no GPIO defined. This is used for
	 * optional GPIOs)
	 */
	if (!fdt_gpio_isvalid(gpio))
		return 0;

	if (gpio_request(gpio->gpio, gpio->name))
		return -1;
	return 0;
}

int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
		u8 *array, int count)
{
	const u8 *cell;
	int err;

	cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
	if (!err)
		memcpy(array, cell, count);
	return err;
}

const u8 *fdtdec_locate_byte_array(const void *blob, int node,
			     const char *prop_name, int count)
{
	const u8 *cell;
	int err;

	cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
	if (err)
		return NULL;
	return cell;
}

int fdtdec_get_config_int(const void *blob, const char *prop_name,
		int default_val)
{
	int config_node;

	debug("%s: %s\n", __func__, prop_name);
	config_node = fdt_path_offset(blob, "/config");
	if (config_node < 0)
		return default_val;
	return fdtdec_get_int(blob, config_node, prop_name, default_val);
}

int fdtdec_get_config_bool(const void *blob, const char *prop_name)
{
	int config_node;
	const void *prop;

	debug("%s: %s\n", __func__, prop_name);
	config_node = fdt_path_offset(blob, "/config");
	if (config_node < 0)
		return 0;
	prop = fdt_get_property(blob, config_node, prop_name, NULL);

	return prop != NULL;
}

char *fdtdec_get_config_string(const void *blob, const char *prop_name)
{
	const char *nodep;
	int nodeoffset;
	int len;

	debug("%s: %s\n", __func__, prop_name);
	nodeoffset = fdt_path_offset(blob, "/config");
	if (nodeoffset < 0)
		return NULL;

	nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
	if (!nodep)
		return NULL;

	return (char *)nodep;
}

int fdtdec_decode_region(const void *blob, int node,
		const char *prop_name, void **ptrp, size_t *size)
{
	const fdt_addr_t *cell;
	int len;

	debug("%s: %s\n", __func__, prop_name);
	cell = fdt_getprop(blob, node, prop_name, &len);
	if (!cell || (len != sizeof(fdt_addr_t) * 2))
		return -1;

	*ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size);
	*size = fdt_size_to_cpu(cell[1]);
	debug("%s: size=%zx\n", __func__, *size);
	return 0;
}

/**
 * Read a flash entry from the fdt
 *
 * @param blob		FDT blob
 * @param node		Offset of node to read
 * @param name		Name of node being read
 * @param entry		Place to put offset and size of this node
 * @return 0 if ok, -ve on error
 */
int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
			   struct fmap_entry *entry)
{
	u32 reg[2];

	if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
		debug("Node '%s' has bad/missing 'reg' property\n", name);
		return -FDT_ERR_NOTFOUND;
	}
	entry->offset = reg[0];
	entry->length = reg[1];

	return 0;
}
#else
#include "libfdt.h"
#include "fdt_support.h"

int fdtdec_get_int(const void *blob, int node, const char *prop_name,
		int default_val)
{
	const int *cell;
	int len;

	cell = fdt_getprop_w((void *)blob, node, prop_name, &len);
	if (cell && len >= sizeof(int)) {
		int val = fdt32_to_cpu(cell[0]);

		return val;
	}
	return default_val;
}
#endif
Commit	Line	Data
b5220bc6 SG	1	/*
b5220bc6 SG	2	* Copyright (c) 2011 The Chromium OS Authors.
1a459660	3	* SPDX-License-Identifier: GPL-2.0+
b5220bc6 SG	4	*/
b5220bc6 SG	5
29a23f9d	6	#ifndef USE_HOSTCC
b5220bc6 SG	7	#include <common.h>
	8	#include <serial.h>
	9	#include <libfdt.h>
	10	#include <fdtdec.h>
	11
e46431e1	12	#include <asm/gpio.h>
ed3ee5cd	13
b5220bc6 SG	14	DECLARE_GLOBAL_DATA_PTR;
	15
	16	/*
	17	* Here are the type we know about. One day we might allow drivers to
	18	* register. For now we just put them here. The COMPAT macro allows us to
	19	* turn this into a sparse list later, and keeps the ID with the name.
	20	*/
	21	#define COMPAT(id, name) name
	22	static const char * const compat_names[COMPAT_COUNT] = {
f88fe2de	23	COMPAT(UNKNOWN, "<none>"),
87f938c9	24	COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
7e44d932 JL	25	COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
7e44d932 JL	26	COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
e32624ef	27	COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"),
96a78ac0 YL	28	COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
96a78ac0 YL	29	COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
0e35ad05 JZ	30	COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
0e35ad05 JZ	31	COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
6642a681	32	COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
312693c3	33	COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
e1ae0d1f	34	COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
87540de3	35	COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
a73ca478	36	COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
f4e4e0b0	37	COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
c9aa831e	38	COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
8f1b46b1	39	COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
b19f5749	40	COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
c3bb3c8b	41	COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
cc9fe33a HR	42	COMPAT(SMSC_LAN9215, "smsc,lan9215"),
cc9fe33a HR	43	COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
c34253d1	44	COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
72dbff12 RS	45	COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
72dbff12 RS	46	COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
5d50659d	47	COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
88364387	48	COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
713cb680	49	COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
6abd1620	50	COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
108b85be	51	COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
6abd1620	52	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
108b85be	53	COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
618766c0	54	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
d7377b51	55	COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
de461c52	56	COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
1e4706a7	57	COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
7d3ca0f8	58	COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
3577fe8b	59	COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
ee1e3c2f	60	COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
cd577e2b	61	COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
bb8215f4	62	COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
7772bb78	63	COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
f6267998	64	COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
ec34fa5e	65	COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
ecbd7e1e	66	COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
df93d90a	67	COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"),
7d95f2a3	68	COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
b5220bc6 SG	69	};
b5220bc6 SG	70
a53f4a29 SG	71	const char *fdtdec_get_compatible(enum fdt_compat_id id)
	72	{
	73	/* We allow reading of the 'unknown' ID for testing purposes */
	74	assert(id >= 0 && id < COMPAT_COUNT);
	75	return compat_names[id];
	76	}
	77
4397a2a8 SG	78	fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
4397a2a8 SG	79	const char prop_name, fdt_size_t sizep)
b5220bc6 SG	80	{
	81	const fdt_addr_t *cell;
	82	int len;
	83
1cb2323b	84	debug("%s: %s: ", __func__, prop_name);
b5220bc6	85	cell = fdt_getprop(blob, node, prop_name, &len);
4397a2a8 SG	86	if (cell && ((!sizep && len == sizeof(fdt_addr_t)) \|\|
4397a2a8 SG	87	len == sizeof(fdt_addr_t) * 2)) {
1cb2323b	88	fdt_addr_t addr = fdt_addr_to_cpu(*cell);
4397a2a8 SG	89	if (sizep) {
4397a2a8 SG	90	const fdt_size_t *size;
1cb2323b	91
4397a2a8 SG	92	size = (fdt_size_t )((char )cell +
	93	sizeof(fdt_addr_t));
	94	sizep = fdt_size_to_cpu(size);
370b6c5c SG	95	debug("addr=%08lx, size=%08x\n",
370b6c5c SG	96	(ulong)addr, *sizep);
4397a2a8	97	} else {
370b6c5c	98	debug("%08lx\n", (ulong)addr);
4397a2a8	99	}
1cb2323b SG	100	return addr;
	101	}
	102	debug("(not found)\n");
b5220bc6 SG	103	return FDT_ADDR_T_NONE;
	104	}
	105
4397a2a8 SG	106	fdt_addr_t fdtdec_get_addr(const void *blob, int node,
	107	const char *prop_name)
	108	{
	109	return fdtdec_get_addr_size(blob, node, prop_name, NULL);
	110	}
	111
b5220bc6 SG	112	s32 fdtdec_get_int(const void blob, int node, const char prop_name,
	113	s32 default_val)
	114	{
	115	const s32 *cell;
	116	int len;
	117
1cb2323b	118	debug("%s: %s: ", __func__, prop_name);
b5220bc6	119	cell = fdt_getprop(blob, node, prop_name, &len);
1cb2323b SG	120	if (cell && len >= sizeof(s32)) {
	121	s32 val = fdt32_to_cpu(cell[0]);
	122
	123	debug("%#x (%d)\n", val, val);
	124	return val;
	125	}
	126	debug("(not found)\n");
b5220bc6 SG	127	return default_val;
	128	}
	129
aadef0a1 CLC	130	uint64_t fdtdec_get_uint64(const void blob, int node, const char prop_name,
	131	uint64_t default_val)
	132	{
	133	const uint64_t *cell64;
	134	int length;
	135
	136	cell64 = fdt_getprop(blob, node, prop_name, &length);
	137	if (!cell64 \|\| length < sizeof(*cell64))
	138	return default_val;
	139
	140	return fdt64_to_cpu(*cell64);
	141	}
	142
f88fe2de	143	int fdtdec_get_is_enabled(const void *blob, int node)
b5220bc6 SG	144	{
	145	const char *cell;
	146
f88fe2de SG	147	/*
	148	* It should say "okay", so only allow that. Some fdts use "ok" but
	149	* this is a bug. Please fix your device tree source file. See here
	150	* for discussion:
	151	*
	152	* http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
	153	*/
b5220bc6 SG	154	cell = fdt_getprop(blob, node, "status", NULL);
b5220bc6 SG	155	if (cell)
f88fe2de SG	156	return 0 == strcmp(cell, "okay");
f88fe2de SG	157	return 1;
b5220bc6 SG	158	}
b5220bc6 SG	159
7cde397b	160	enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
b5220bc6 SG	161	{
	162	enum fdt_compat_id id;
	163
	164	/* Search our drivers */
	165	for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
	166	if (0 == fdt_node_check_compatible(blob, node,
	167	compat_names[id]))
	168	return id;
	169	return COMPAT_UNKNOWN;
	170	}
	171
	172	int fdtdec_next_compatible(const void *blob, int node,
	173	enum fdt_compat_id id)
	174	{
	175	return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
	176	}
	177
3ddecfc7 SG	178	int fdtdec_next_compatible_subnode(const void *blob, int node,
	179	enum fdt_compat_id id, int *depthp)
	180	{
	181	do {
	182	node = fdt_next_node(blob, node, depthp);
	183	} while (*depthp > 1);
	184
	185	/* If this is a direct subnode, and compatible, return it */
	186	if (*depthp == 1 && 0 == fdt_node_check_compatible(
	187	blob, node, compat_names[id]))
	188	return node;
	189
	190	return -FDT_ERR_NOTFOUND;
	191	}
	192
b5220bc6 SG	193	int fdtdec_next_alias(const void blob, const char name,
	194	enum fdt_compat_id id, int *upto)
	195	{
	196	#define MAX_STR_LEN 20
	197	char str[MAX_STR_LEN + 20];
	198	int node, err;
	199
	200	/* snprintf() is not available */
	201	assert(strlen(name) < MAX_STR_LEN);
	202	sprintf(str, "%.s%d", MAX_STR_LEN, name, upto);
00878476	203	node = fdt_path_offset(blob, str);
b5220bc6 SG	204	if (node < 0)
	205	return node;
	206	err = fdt_node_check_compatible(blob, node, compat_names[id]);
	207	if (err < 0)
	208	return err;
f88fe2de SG	209	if (err)
	210	return -FDT_ERR_NOTFOUND;
	211	(*upto)++;
	212	return node;
b5220bc6 SG	213	}
b5220bc6 SG	214
a53f4a29 SG	215	int fdtdec_find_aliases_for_id(const void blob, const char name,
a53f4a29 SG	216	enum fdt_compat_id id, int *node_list, int maxcount)
c6782270 SG	217	{
	218	memset(node_list, '\0', sizeof(node_list) maxcount);
	219
	220	return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
	221	}
	222
	223	/* TODO: Can we tighten this code up a little? */
	224	int fdtdec_add_aliases_for_id(const void blob, const char name,
	225	enum fdt_compat_id id, int *node_list, int maxcount)
a53f4a29 SG	226	{
	227	int name_len = strlen(name);
	228	int nodes[maxcount];
	229	int num_found = 0;
	230	int offset, node;
	231	int alias_node;
	232	int count;
	233	int i, j;
	234
	235	/* find the alias node if present */
	236	alias_node = fdt_path_offset(blob, "/aliases");
	237
	238	/*
	239	* start with nothing, and we can assume that the root node can't
	240	* match
	241	*/
	242	memset(nodes, '\0', sizeof(nodes));
	243
	244	/* First find all the compatible nodes */
	245	for (node = count = 0; node >= 0 && count < maxcount;) {
	246	node = fdtdec_next_compatible(blob, node, id);
	247	if (node >= 0)
	248	nodes[count++] = node;
	249	}
	250	if (node >= 0)
	251	debug("%s: warning: maxcount exceeded with alias '%s'\n",
	252	__func__, name);
	253
	254	/* Now find all the aliases */
a53f4a29 SG	255	for (offset = fdt_first_property_offset(blob, alias_node);
	256	offset > 0;
	257	offset = fdt_next_property_offset(blob, offset)) {
	258	const struct fdt_property *prop;
	259	const char *path;
	260	int number;
	261	int found;
	262
	263	node = 0;
	264	prop = fdt_get_property_by_offset(blob, offset, NULL);
	265	path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
	266	if (prop->len && 0 == strncmp(path, name, name_len))
	267	node = fdt_path_offset(blob, prop->data);
	268	if (node <= 0)
	269	continue;
	270
	271	/* Get the alias number */
	272	number = simple_strtoul(path + name_len, NULL, 10);
	273	if (number < 0 \|\| number >= maxcount) {
	274	debug("%s: warning: alias '%s' is out of range\n",
	275	__func__, path);
	276	continue;
	277	}
	278
	279	/* Make sure the node we found is actually in our list! */
	280	found = -1;
	281	for (j = 0; j < count; j++)
	282	if (nodes[j] == node) {
	283	found = j;
	284	break;
	285	}
	286
	287	if (found == -1) {
	288	debug("%s: warning: alias '%s' points to a node "
	289	"'%s' that is missing or is not compatible "
	290	" with '%s'\n", __func__, path,
	291	fdt_get_name(blob, node, NULL),
	292	compat_names[id]);
	293	continue;
	294	}
	295
	296	/*
	297	* Add this node to our list in the right place, and mark
	298	* it as done.
	299	*/
	300	if (fdtdec_get_is_enabled(blob, node)) {
c6782270 SG	301	if (node_list[number]) {
	302	debug("%s: warning: alias '%s' requires that "
	303	"a node be placed in the list in a "
	304	"position which is already filled by "
	305	"node '%s'\n", __func__, path,
	306	fdt_get_name(blob, node, NULL));
	307	continue;
	308	}
a53f4a29 SG	309	node_list[number] = node;
	310	if (number >= num_found)
	311	num_found = number + 1;
	312	}
c6782270	313	nodes[found] = 0;
a53f4a29 SG	314	}
	315
	316	/* Add any nodes not mentioned by an alias */
	317	for (i = j = 0; i < maxcount; i++) {
	318	if (!node_list[i]) {
	319	for (; j < maxcount; j++)
	320	if (nodes[j] &&
	321	fdtdec_get_is_enabled(blob, nodes[j]))
	322	break;
	323
	324	/* Have we run out of nodes to add? */
	325	if (j == maxcount)
	326	break;
	327
	328	assert(!node_list[i]);
	329	node_list[i] = nodes[j++];
	330	if (i >= num_found)
	331	num_found = i + 1;
	332	}
	333	}
	334
	335	return num_found;
	336	}
	337
9a263e55 SG	338	int fdtdec_check_fdt(void)
	339	{
	340	/*
	341	* We must have an FDT, but we cannot panic() yet since the console
	342	* is not ready. So for now, just assert(). Boards which need an early
	343	* FDT (prior to console ready) will need to make their own
	344	* arrangements and do their own checks.
	345	*/
	346	assert(!fdtdec_prepare_fdt());
	347	return 0;
	348	}
	349
b5220bc6 SG	350	/*
	351	* This function is a little odd in that it accesses global data. At some
	352	* point if the architecture board.c files merge this will make more sense.
	353	* Even now, it is common code.
	354	*/
9a263e55	355	int fdtdec_prepare_fdt(void)
b5220bc6	356	{
c309c2da SG	357	if (!gd->fdt_blob \|\| ((uintptr_t)gd->fdt_blob & 3) \|\|
c309c2da SG	358	fdt_check_header(gd->fdt_blob)) {
9a263e55 SG	359	printf("No valid FDT found - please append one to U-Boot "
9a263e55 SG	360	"binary, use u-boot-dtb.bin or define "
a733b06b	361	"CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
9a263e55 SG	362	return -1;
9a263e55 SG	363	}
b5220bc6 SG	364	return 0;
b5220bc6 SG	365	}
d17da655 SG	366
	367	int fdtdec_lookup_phandle(const void blob, int node, const char prop_name)
	368	{
	369	const u32 *phandle;
	370	int lookup;
	371
1cb2323b	372	debug("%s: %s\n", __func__, prop_name);
d17da655 SG	373	phandle = fdt_getprop(blob, node, prop_name, NULL);
	374	if (!phandle)
	375	return -FDT_ERR_NOTFOUND;
	376
	377	lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
	378	return lookup;
	379	}
	380
	381	/**
	382	* Look up a property in a node and check that it has a minimum length.
	383	*
	384	* @param blob FDT blob
	385	* @param node node to examine
	386	* @param prop_name name of property to find
	387	* @param min_len minimum property length in bytes
	388	* @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
	389	found, or -FDT_ERR_BADLAYOUT if not enough data
	390	* @return pointer to cell, which is only valid if err == 0
	391	*/
	392	static const void get_prop_check_min_len(const void blob, int node,
	393	const char prop_name, int min_len, int err)
	394	{
	395	const void *cell;
	396	int len;
	397
	398	debug("%s: %s\n", __func__, prop_name);
	399	cell = fdt_getprop(blob, node, prop_name, &len);
	400	if (!cell)
	401	*err = -FDT_ERR_NOTFOUND;
	402	else if (len < min_len)
	403	*err = -FDT_ERR_BADLAYOUT;
	404	else
	405	*err = 0;
	406	return cell;
	407	}
	408
	409	int fdtdec_get_int_array(const void blob, int node, const char prop_name,
	410	u32 *array, int count)
	411	{
	412	const u32 *cell;
	413	int i, err = 0;
	414
	415	debug("%s: %s\n", __func__, prop_name);
	416	cell = get_prop_check_min_len(blob, node, prop_name,
	417	sizeof(u32) * count, &err);
	418	if (!err) {
	419	for (i = 0; i < count; i++)
	420	array[i] = fdt32_to_cpu(cell[i]);
	421	}
	422	return err;
	423	}
	424
96875e7d SG	425	const u32 fdtdec_locate_array(const void blob, int node,
	426	const char *prop_name, int count)
	427	{
	428	const u32 *cell;
	429	int err;
	430
	431	cell = get_prop_check_min_len(blob, node, prop_name,
	432	sizeof(u32) * count, &err);
	433	return err ? NULL : cell;
	434	}
	435
d17da655 SG	436	int fdtdec_get_bool(const void blob, int node, const char prop_name)
	437	{
	438	const s32 *cell;
	439	int len;
	440
	441	debug("%s: %s\n", __func__, prop_name);
	442	cell = fdt_getprop(blob, node, prop_name, &len);
	443	return cell != NULL;
	444	}
ed3ee5cd SG	445
	446	/**
	447	* Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
	448	* terminating item.
	449	*
	450	* @param blob FDT blob to use
	451	* @param node Node to look at
	452	* @param prop_name Node property name
	453	* @param gpio Array of gpio elements to fill from FDT. This will be
	454	* untouched if either 0 or an error is returned
	455	* @param max_count Maximum number of elements allowed
	456	* @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
	457	* be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
	458	*/
5921f6a2 AK	459	int fdtdec_decode_gpios(const void blob, int node, const char prop_name,
5921f6a2 AK	460	struct fdt_gpio_state *gpio, int max_count)
ed3ee5cd SG	461	{
	462	const struct fdt_property *prop;
	463	const u32 *cell;
	464	const char *name;
	465	int len, i;
	466
	467	debug("%s: %s\n", __func__, prop_name);
	468	assert(max_count > 0);
	469	prop = fdt_get_property(blob, node, prop_name, &len);
	470	if (!prop) {
1cb2323b	471	debug("%s: property '%s' missing\n", __func__, prop_name);
ed3ee5cd SG	472	return -FDT_ERR_NOTFOUND;
	473	}
	474
	475	/* We will use the name to tag the GPIO */
	476	name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
	477	cell = (u32 *)prop->data;
	478	len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
	479	if (len > max_count) {
1cb2323b	480	debug(" %s: too many GPIOs / cells for "
ed3ee5cd SG	481	"property '%s'\n", __func__, prop_name);
	482	return -FDT_ERR_BADLAYOUT;
	483	}
	484
	485	/* Read out the GPIO data from the cells */
	486	for (i = 0; i < len; i++, cell += 3) {
	487	gpio[i].gpio = fdt32_to_cpu(cell[1]);
	488	gpio[i].flags = fdt32_to_cpu(cell[2]);
	489	gpio[i].name = name;
	490	}
	491
	492	return len;
	493	}
	494
	495	int fdtdec_decode_gpio(const void blob, int node, const char prop_name,
	496	struct fdt_gpio_state *gpio)
	497	{
	498	int err;
	499
	500	debug("%s: %s\n", __func__, prop_name);
	501	gpio->gpio = FDT_GPIO_NONE;
	502	gpio->name = NULL;
	503	err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
	504	return err == 1 ? 0 : err;
	505	}
	506
202ff753 SP	507	int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
	508	{
	509	int val;
	510
	511	if (!fdt_gpio_isvalid(gpio))
	512	return -1;
	513
	514	val = gpio_get_value(gpio->gpio);
	515	return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
	516	}
	517
	518	int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
	519	{
	520	if (!fdt_gpio_isvalid(gpio))
	521	return -1;
	522
	523	val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
	524	return gpio_set_value(gpio->gpio, val);
	525	}
	526
ed3ee5cd SG	527	int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
	528	{
	529	/*
	530	* Return success if there is no GPIO defined. This is used for
	531	* optional GPIOs)
	532	*/
	533	if (!fdt_gpio_isvalid(gpio))
	534	return 0;
	535
	536	if (gpio_request(gpio->gpio, gpio->name))
	537	return -1;
	538	return 0;
	539	}
bed4d892 AS	540
	541	int fdtdec_get_byte_array(const void blob, int node, const char prop_name,
	542	u8 *array, int count)
	543	{
	544	const u8 *cell;
	545	int err;
	546
	547	cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
	548	if (!err)
	549	memcpy(array, cell, count);
	550	return err;
	551	}
	552
	553	const u8 fdtdec_locate_byte_array(const void blob, int node,
	554	const char *prop_name, int count)
	555	{
	556	const u8 *cell;
	557	int err;
	558
	559	cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
	560	if (err)
	561	return NULL;
	562	return cell;
	563	}
09258f1e	564
09258f1e AK	565	int fdtdec_get_config_int(const void blob, const char prop_name,
	566	int default_val)
	567	{
	568	int config_node;
	569
	570	debug("%s: %s\n", __func__, prop_name);
	571	config_node = fdt_path_offset(blob, "/config");
	572	if (config_node < 0)
	573	return default_val;
	574	return fdtdec_get_int(blob, config_node, prop_name, default_val);
	575	}
332ab0d5	576
79289c0b GB	577	int fdtdec_get_config_bool(const void blob, const char prop_name)
	578	{
	579	int config_node;
	580	const void *prop;
	581
	582	debug("%s: %s\n", __func__, prop_name);
	583	config_node = fdt_path_offset(blob, "/config");
	584	if (config_node < 0)
	585	return 0;
	586	prop = fdt_get_property(blob, config_node, prop_name, NULL);
	587
	588	return prop != NULL;
	589	}
	590
332ab0d5 SG	591	char fdtdec_get_config_string(const void blob, const char *prop_name)
	592	{
	593	const char *nodep;
	594	int nodeoffset;
	595	int len;
	596
	597	debug("%s: %s\n", __func__, prop_name);
	598	nodeoffset = fdt_path_offset(blob, "/config");
	599	if (nodeoffset < 0)
	600	return NULL;
	601
	602	nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
	603	if (!nodep)
	604	return NULL;
	605
	606	return (char *)nodep;
	607	}
f20c4619 SG	608
	609	int fdtdec_decode_region(const void *blob, int node,
	610	const char prop_name, void ptrp, size_t size)
	611	{
	612	const fdt_addr_t *cell;
	613	int len;
	614
	615	debug("%s: %s\n", __func__, prop_name);
	616	cell = fdt_getprop(blob, node, prop_name, &len);
	617	if (!cell \|\| (len != sizeof(fdt_addr_t) * 2))
	618	return -1;
	619
370b6c5c	620	ptrp = map_sysmem(fdt_addr_to_cpu(cell), *size);
f20c4619 SG	621	*size = fdt_size_to_cpu(cell[1]);
	622	debug("%s: size=%zx\n", __func__, *size);
	623	return 0;
	624	}
006e73b9 SG	625
	626	/**
	627	* Read a flash entry from the fdt
	628	*
	629	* @param blob FDT blob
	630	* @param node Offset of node to read
	631	* @param name Name of node being read
	632	* @param entry Place to put offset and size of this node
	633	* @return 0 if ok, -ve on error
	634	*/
	635	int fdtdec_read_fmap_entry(const void blob, int node, const char name,
	636	struct fmap_entry *entry)
	637	{
	638	u32 reg[2];
	639
	640	if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
	641	debug("Node '%s' has bad/missing 'reg' property\n", name);
	642	return -FDT_ERR_NOTFOUND;
	643	}
	644	entry->offset = reg[0];
	645	entry->length = reg[1];
	646
	647	return 0;
	648	}
29a23f9d HS	649	#else
	650	#include "libfdt.h"
	651	#include "fdt_support.h"
	652
	653	int fdtdec_get_int(const void blob, int node, const char prop_name,
	654	int default_val)
	655	{
	656	const int *cell;
	657	int len;
	658
	659	cell = fdt_getprop_w((void *)blob, node, prop_name, &len);
	660	if (cell && len >= sizeof(int)) {
	661	int val = fdt32_to_cpu(cell[0]);
	662
	663	return val;
	664	}
	665	return default_val;
	666	}
	667	#endif