cros_ec.c

	params.index = index;
	params.state = state;

	if (ec_command_inptr(dev, EC_CMD_LDO_SET, 0,
		       &params, sizeof(params),
		       NULL, 0))
		return -1;

	return 0;
}

int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state)
{
	struct ec_params_ldo_get params;
	struct ec_response_ldo_get *resp;

	params.index = index;

	if (ec_command_inptr(dev, EC_CMD_LDO_GET, 0,
		       &params, sizeof(params),
		       (uint8_t **)&resp, sizeof(*resp)) != sizeof(*resp))
		return -1;

	*state = resp->state;

	return 0;
}

#ifndef CONFIG_DM_CROS_EC
/**
 * Decode EC interface details from the device tree and allocate a suitable
 * device.
 *
 * @param blob		Device tree blob
 * @param node		Node to decode from
 * @param devp		Returns a pointer to the new allocated device
 * @return 0 if ok, -1 on error
 */
static int cros_ec_decode_fdt(const void *blob, int node,
		struct cros_ec_dev **devp)
{
	enum fdt_compat_id compat;
	struct cros_ec_dev *dev;
	int parent;

	/* See what type of parent we are inside (this is expensive) */
	parent = fdt_parent_offset(blob, node);
	if (parent < 0) {
		debug("%s: Cannot find node parent\n", __func__);
		return -1;
	}

	dev = &static_dev;
	dev->node = node;
	dev->parent_node = parent;

	compat = fdtdec_lookup(blob, parent);
	switch (compat) {
#ifdef CONFIG_CROS_EC_SPI
	case COMPAT_SAMSUNG_EXYNOS_SPI:
		dev->interface = CROS_EC_IF_SPI;
		if (cros_ec_spi_decode_fdt(dev, blob))
			return -1;
		break;
#endif
#ifdef CONFIG_CROS_EC_I2C
	case COMPAT_SAMSUNG_S3C2440_I2C:
		dev->interface = CROS_EC_IF_I2C;
		if (cros_ec_i2c_decode_fdt(dev, blob))
			return -1;
		break;
#endif
#ifdef CONFIG_CROS_EC_LPC
	case COMPAT_INTEL_LPC:
		dev->interface = CROS_EC_IF_LPC;
		break;
#endif
#ifdef CONFIG_CROS_EC_SANDBOX
	case COMPAT_SANDBOX_HOST_EMULATION:
		dev->interface = CROS_EC_IF_SANDBOX;
		break;
#endif
	default:
		debug("%s: Unknown compat id %d\n", __func__, compat);
		return -1;
	}

	gpio_request_by_name_nodev(blob, node, "ec-interrupt", 0, &dev->ec_int,
				   GPIOD_IS_IN);
	dev->optimise_flash_write = fdtdec_get_bool(blob, node,
						    "optimise-flash-write");
	*devp = dev;

	return 0;
}
#endif

#ifdef CONFIG_DM_CROS_EC
int cros_ec_register(struct udevice *dev)
{
	struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
	const void *blob = gd->fdt_blob;
	int node = dev->of_offset;
	char id[MSG_BYTES];

	cdev->dev = dev;
	gpio_request_by_name(dev, "ec-interrupt", 0, &cdev->ec_int,
			     GPIOD_IS_IN);
	cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
						     "optimise-flash-write");

	if (cros_ec_check_version(cdev)) {
		debug("%s: Could not detect CROS-EC version\n", __func__);
		return -CROS_EC_ERR_CHECK_VERSION;
	}

	if (cros_ec_read_id(cdev, id, sizeof(id))) {
		debug("%s: Could not read KBC ID\n", __func__);
		return -CROS_EC_ERR_READ_ID;
	}

	/* Remember this device for use by the cros_ec command */
	debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);

	return 0;
}
#else
int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
{
	struct cros_ec_dev *dev;
	char id[MSG_BYTES];
#ifdef CONFIG_DM_CROS_EC
	struct udevice *udev;
	int ret;

	ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
	if (!ret)
		device_remove(udev);
	ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
	if (ret)
		return ret;
	dev = dev_get_uclass_priv(udev);
	return 0;
#else
	int node = 0;

	*cros_ecp = NULL;
	do {
		node = fdtdec_next_compatible(blob, node,
					      COMPAT_GOOGLE_CROS_EC);
		if (node < 0) {
			debug("%s: Node not found\n", __func__);
			return 0;
		}
	} while (!fdtdec_get_is_enabled(blob, node));

	if (cros_ec_decode_fdt(blob, node, &dev)) {
		debug("%s: Failed to decode device.\n", __func__);
		return -CROS_EC_ERR_FDT_DECODE;
	}

	switch (dev->interface) {
#ifdef CONFIG_CROS_EC_SPI
	case CROS_EC_IF_SPI:
		if (cros_ec_spi_init(dev, blob)) {
			debug("%s: Could not setup SPI interface\n", __func__);
			return -CROS_EC_ERR_DEV_INIT;
		}
		break;
#endif
#ifdef CONFIG_CROS_EC_I2C
	case CROS_EC_IF_I2C:
		if (cros_ec_i2c_init(dev, blob))
			return -CROS_EC_ERR_DEV_INIT;
		break;
#endif
#ifdef CONFIG_CROS_EC_LPC
	case CROS_EC_IF_LPC:
		if (cros_ec_lpc_init(dev, blob))
			return -CROS_EC_ERR_DEV_INIT;
		break;
#endif
#ifdef CONFIG_CROS_EC_SANDBOX
	case CROS_EC_IF_SANDBOX:
		if (cros_ec_sandbox_init(dev, blob))
			return -CROS_EC_ERR_DEV_INIT;
		break;
#endif
	case CROS_EC_IF_NONE:
	default:
		return 0;
	}
#endif

	if (cros_ec_check_version(dev)) {
		debug("%s: Could not detect CROS-EC version\n", __func__);
		return -CROS_EC_ERR_CHECK_VERSION;
	}

	if (cros_ec_read_id(dev, id, sizeof(id))) {
		debug("%s: Could not read KBC ID\n", __func__);
		return -CROS_EC_ERR_READ_ID;
	}

	/* Remember this device for use by the cros_ec command */
	*cros_ecp = dev;
#ifndef CONFIG_DM_CROS_EC
	last_dev = dev;
#endif
	debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);

	return 0;
}
#endif

int cros_ec_decode_region(int argc, char * const argv[])
{
	if (argc > 0) {
		if (0 == strcmp(*argv, "rw"))
			return EC_FLASH_REGION_RW;
		else if (0 == strcmp(*argv, "ro"))
			return EC_FLASH_REGION_RO;

		debug("%s: Invalid region '%s'\n", __func__, *argv);
	} else {
		debug("%s: Missing region parameter\n", __func__);
	}

	return -1;
}

int cros_ec_decode_ec_flash(const void *blob, int node,
			    struct fdt_cros_ec *config)
{
	int flash_node;

	flash_node = fdt_subnode_offset(blob, node, "flash");
	if (flash_node < 0) {
		debug("Failed to find flash node\n");
		return -1;
	}

	if (fdtdec_read_fmap_entry(blob, flash_node, "flash",
				   &config->flash)) {
		debug("Failed to decode flash node in chrome-ec'\n");
		return -1;
	}

	config->flash_erase_value = fdtdec_get_int(blob, flash_node,
						    "erase-value", -1);
	for (node = fdt_first_subnode(blob, flash_node); node >= 0;
	     node = fdt_next_subnode(blob, node)) {
		const char *name = fdt_get_name(blob, node, NULL);
		enum ec_flash_region region;

		if (0 == strcmp(name, "ro")) {
			region = EC_FLASH_REGION_RO;
		} else if (0 == strcmp(name, "rw")) {
			region = EC_FLASH_REGION_RW;
		} else if (0 == strcmp(name, "wp-ro")) {
			region = EC_FLASH_REGION_WP_RO;
		} else {
			debug("Unknown EC flash region name '%s'\n", name);
			return -1;
		}

		if (fdtdec_read_fmap_entry(blob, node, "reg",
					   &config->region[region])) {
			debug("Failed to decode flash region in chrome-ec'\n");
			return -1;
		}
	}

	return 0;
}

int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr,
		     int alen, uchar *buffer, int len, int is_read)
{
	union {
		struct ec_params_i2c_passthru p;
		uint8_t outbuf[EC_PROTO2_MAX_PARAM_SIZE];
	} params;
	union {
		struct ec_response_i2c_passthru r;
		uint8_t inbuf[EC_PROTO2_MAX_PARAM_SIZE];
	} response;
	struct ec_params_i2c_passthru *p = &params.p;
	struct ec_response_i2c_passthru *r = &response.r;
	struct ec_params_i2c_passthru_msg *msg = p->msg;
	uint8_t *pdata;
	int read_len, write_len;
	int size;
	int rv;

	p->port = 0;

	if (alen != 1) {
		printf("Unsupported address length %d\n", alen);
		return -1;
	}
	if (is_read) {
		read_len = len;
		write_len = alen;
		p->num_msgs = 2;
	} else {
		read_len = 0;
		write_len = alen + len;
		p->num_msgs = 1;
	}

	size = sizeof(*p) + p->num_msgs * sizeof(*msg);
	if (size + write_len > sizeof(params)) {
		puts("Params too large for buffer\n");
		return -1;
	}
	if (sizeof(*r) + read_len > sizeof(response)) {
		puts("Read length too big for buffer\n");
		return -1;
	}

	/* Create a message to write the register address and optional data */
	pdata = (uint8_t *)p + size;
	msg->addr_flags = chip;
	msg->len = write_len;
	pdata[0] = addr;
	if (!is_read)
		memcpy(pdata + 1, buffer, len);
	msg++;

	if (read_len) {
		msg->addr_flags = chip | EC_I2C_FLAG_READ;
		msg->len = read_len;
	}

	rv = ec_command(dev, EC_CMD_I2C_PASSTHRU, 0, p, size + write_len,
			r, sizeof(*r) + read_len);
	if (rv < 0)
		return rv;

	/* Parse response */
	if (r->i2c_status & EC_I2C_STATUS_ERROR) {
		printf("Transfer failed with status=0x%x\n", r->i2c_status);
		return -1;
	}

	if (rv < sizeof(*r) + read_len) {
		puts("Truncated read response\n");
		return -1;
	}

	if (read_len)
		memcpy(buffer, r->data, read_len);

	return 0;
}

#ifdef CONFIG_CMD_CROS_EC

/**
 * Perform a flash read or write command
 *
 * @param dev		CROS-EC device to read/write
 * @param is_write	1 do to a write, 0 to do a read
 * @param argc		Number of arguments
 * @param argv		Arguments (2 is region, 3 is address)
 * @return 0 for ok, 1 for a usage error or -ve for ec command error
 *	(negative EC_RES_...)
 */
static int do_read_write(struct cros_ec_dev *dev, int is_write, int argc,
			 char * const argv[])
{
	uint32_t offset, size = -1U, region_size;
	unsigned long addr;
	char *endp;
	int region;
	int ret;

	region = cros_ec_decode_region(argc - 2, argv + 2);
	if (region == -1)
		return 1;
	if (argc < 4)
		return 1;
	addr = simple_strtoul(argv[3], &endp, 16);
	if (*argv[3] == 0 || *endp != 0)
		return 1;
	if (argc > 4) {
		size = simple_strtoul(argv[4], &endp, 16);
		if (*argv[4] == 0 || *endp != 0)
			return 1;
	}

	ret = cros_ec_flash_offset(dev, region, &offset, &region_size);
	if (ret) {
		debug("%s: Could not read region info\n", __func__);
		return ret;
	}
	if (size == -1U)
		size = region_size;

	ret = is_write ?
		cros_ec_flash_write(dev, (uint8_t *)addr, offset, size) :
		cros_ec_flash_read(dev, (uint8_t *)addr, offset, size);
	if (ret) {
		debug("%s: Could not %s region\n", __func__,
		      is_write ? "write" : "read");
		return ret;
	}

	return 0;
}

/**
 * get_alen() - Small parser helper function to get address length
 *
 * Returns the address length.
 */
static uint get_alen(char *arg)
{
	int	j;
	int	alen;

	alen = 1;
	for (j = 0; j < 8; j++) {
		if (arg[j] == '.') {
			alen = arg[j+1] - '0';
			break;
		} else if (arg[j] == '\0') {
			break;
		}
	}
	return alen;
}

#define DISP_LINE_LEN	16

/*
 * TODO(sjg@chromium.org): This code copied almost verbatim from cmd_i2c.c
 * so we can remove it later.
 */
static int cros_ec_i2c_md(struct cros_ec_dev *dev, int flag, int argc,
			  char * const argv[])
{
	u_char	chip;
	uint	addr, alen, length = 0x10;
	int	j, nbytes, linebytes;

	if (argc < 2)
		return CMD_RET_USAGE;

	if (1 || (flag & CMD_FLAG_REPEAT) == 0) {
		/*
		 * New command specified.
		 */

		/*
		 * I2C chip address
		 */
		chip = simple_strtoul(argv[0], NULL, 16);

		/*
		 * I2C data address within the chip.  This can be 1 or
		 * 2 bytes long.  Some day it might be 3 bytes long :-).
		 */
		addr = simple_strtoul(argv[1], NULL, 16);
		alen = get_alen(argv[1]);
		if (alen > 3)
			return CMD_RET_USAGE;

		/*
		 * If another parameter, it is the length to display.
		 * Length is the number of objects, not number of bytes.
		 */
		if (argc > 2)
			length = simple_strtoul(argv[2], NULL, 16);
	}

	/*
	 * Print the lines.
	 *
	 * We buffer all read data, so we can make sure data is read only
	 * once.
	 */
	nbytes = length;
	do {
		unsigned char	linebuf[DISP_LINE_LEN];
		unsigned char	*cp;

		linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;

		if (cros_ec_i2c_xfer(dev, chip, addr, alen, linebuf, linebytes,
				     1))
			puts("Error reading the chip.\n");
		else {
			printf("%04x:", addr);
			cp = linebuf;
			for (j = 0; j < linebytes; j++) {
				printf(" %02x", *cp++);
				addr++;
			}
			puts("    ");
			cp = linebuf;
			for (j = 0; j < linebytes; j++) {
				if ((*cp < 0x20) || (*cp > 0x7e))
					puts(".");
				else
					printf("%c", *cp);
				cp++;
			}
			putc('\n');
		}
		nbytes -= linebytes;
	} while (nbytes > 0);

	return 0;
}

static int cros_ec_i2c_mw(struct cros_ec_dev *dev, int flag, int argc,
			  char * const argv[])
{
	uchar	chip;
	ulong	addr;
	uint	alen;
	uchar	byte;
	int	count;

	if ((argc < 3) || (argc > 4))
		return CMD_RET_USAGE;

	/*
	 * Chip is always specified.
	 */
	chip = simple_strtoul(argv[0], NULL, 16);

	/*
	 * Address is always specified.
	 */
	addr = simple_strtoul(argv[1], NULL, 16);
	alen = get_alen(argv[1]);
	if (alen > 3)
		return CMD_RET_USAGE;

	/*
	 * Value to write is always specified.
	 */
	byte = simple_strtoul(argv[2], NULL, 16);

	/*
	 * Optional count
	 */
	if (argc == 4)
		count = simple_strtoul(argv[3], NULL, 16);
	else
		count = 1;

	while (count-- > 0) {
		if (cros_ec_i2c_xfer(dev, chip, addr++, alen, &byte, 1, 0))
			puts("Error writing the chip.\n");
		/*
		 * Wait for the write to complete.  The write can take
		 * up to 10mSec (we allow a little more time).
		 */
/*
 * No write delay with FRAM devices.
 */
#if !defined(CONFIG_SYS_I2C_FRAM)
		udelay(11000);
#endif
	}

	return 0;
}

/* Temporary code until we have driver model and can use the i2c command */
static int cros_ec_i2c_passthrough(struct cros_ec_dev *dev, int flag,
				   int argc, char * const argv[])
{
	const char *cmd;

	if (argc < 1)
		return CMD_RET_USAGE;
	cmd = *argv++;
	argc--;
	if (0 == strcmp("md", cmd))
		cros_ec_i2c_md(dev, flag, argc, argv);
	else if (0 == strcmp("mw", cmd))
		cros_ec_i2c_mw(dev, flag, argc, argv);
	else
		return CMD_RET_USAGE;

	return 0;
}

static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	struct cros_ec_dev *dev;
#ifdef CONFIG_DM_CROS_EC
	struct udevice *udev;
#endif
	const char *cmd;
	int ret = 0;

	if (argc < 2)
		return CMD_RET_USAGE;

	cmd = argv[1];
	if (0 == strcmp("init", cmd)) {
#ifndef CONFIG_DM_CROS_EC
		ret = cros_ec_init(gd->fdt_blob, &dev);
		if (ret) {
			printf("Could not init cros_ec device (err %d)\n", ret);
			return 1;
		}
#endif
		return 0;
	}

#ifdef CONFIG_DM_CROS_EC
	ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
	if (ret) {
		printf("Cannot get cros-ec device (err=%d)\n", ret);
		return 1;
	}
	dev = dev_get_uclass_priv(udev);
#else
	/* Just use the last allocated device; there should be only one */
	if (!last_dev) {
		printf("No CROS-EC device available\n");
		return 1;
	}
	dev = last_dev;
#endif
	if (0 == strcmp("id", cmd)) {
		char id[MSG_BYTES];

		if (cros_ec_read_id(dev, id, sizeof(id))) {
			debug("%s: Could not read KBC ID\n", __func__);
			return 1;
		}
		printf("%s\n", id);
	} else if (0 == strcmp("info", cmd)) {
		struct ec_response_mkbp_info info;

		if (cros_ec_info(dev, &info)) {
			debug("%s: Could not read KBC info\n", __func__);
			return 1;
		}
		printf("rows     = %u\n", info.rows);
		printf("cols     = %u\n", info.cols);
		printf("switches = %#x\n", info.switches);
	} else if (0 == strcmp("curimage", cmd)) {
		enum ec_current_image image;

		if (cros_ec_read_current_image(dev, &image)) {
			debug("%s: Could not read KBC image\n", __func__);
			return 1;
		}
		printf("%d\n", image);
	} else if (0 == strcmp("hash", cmd)) {
		struct ec_response_vboot_hash hash;
		int i;

		if (cros_ec_read_hash(dev, &hash)) {
			debug("%s: Could not read KBC hash\n", __func__);
			return 1;
		}

		if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
			printf("type:    SHA-256\n");
		else
			printf("type:    %d\n", hash.hash_type);

		printf("offset:  0x%08x\n", hash.offset);
		printf("size:    0x%08x\n", hash.size);

		printf("digest:  ");
		for (i = 0; i < hash.digest_size; i++)
			printf("%02x", hash.hash_digest[i]);
		printf("\n");
	} else if (0 == strcmp("reboot", cmd)) {
		int region;
		enum ec_reboot_cmd cmd;

		if (argc >= 3 && !strcmp(argv[2], "cold"))
			cmd = EC_REBOOT_COLD;
		else {
			region = cros_ec_decode_region(argc - 2, argv + 2);
			if (region == EC_FLASH_REGION_RO)
				cmd = EC_REBOOT_JUMP_RO;
			else if (region == EC_FLASH_REGION_RW)
				cmd = EC_REBOOT_JUMP_RW;
			else
				return CMD_RET_USAGE;
		}

		if (cros_ec_reboot(dev, cmd, 0)) {
			debug("%s: Could not reboot KBC\n", __func__);
			return 1;
		}
	} else if (0 == strcmp("events", cmd)) {
		uint32_t events;

		if (cros_ec_get_host_events(dev, &events)) {
			debug("%s: Could not read host events\n", __func__);
			return 1;
		}
		printf("0x%08x\n", events);
	} else if (0 == strcmp("clrevents", cmd)) {
		uint32_t events = 0x7fffffff;

		if (argc >= 3)
			events = simple_strtol(argv[2], NULL, 0);

		if (cros_ec_clear_host_events(dev, events)) {
			debug("%s: Could not clear host events\n", __func__);
			return 1;
		}
	} else if (0 == strcmp("read", cmd)) {
		ret = do_read_write(dev, 0, argc, argv);
		if (ret > 0)
			return CMD_RET_USAGE;
	} else if (0 == strcmp("write", cmd)) {
		ret = do_read_write(dev, 1, argc, argv);
		if (ret > 0)
			return CMD_RET_USAGE;
	} else if (0 == strcmp("erase", cmd)) {
		int region = cros_ec_decode_region(argc - 2, argv + 2);
		uint32_t offset, size;

		if (region == -1)
			return CMD_RET_USAGE;
		if (cros_ec_flash_offset(dev, region, &offset, &size)) {
			debug("%s: Could not read region info\n", __func__);
			ret = -1;
		} else {
			ret = cros_ec_flash_erase(dev, offset, size);
			if (ret) {
				debug("%s: Could not erase region\n",
				      __func__);
			}
		}
	} else if (0 == strcmp("regioninfo", cmd)) {
		int region = cros_ec_decode_region(argc - 2, argv + 2);
		uint32_t offset, size;

		if (region == -1)
			return CMD_RET_USAGE;
		ret = cros_ec_flash_offset(dev, region, &offset, &size);
		if (ret) {
			debug("%s: Could not read region info\n", __func__);
		} else {
			printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
					"RO" : "RW");
			printf("Offset: %x\n", offset);
			printf("Size:   %x\n", size);
		}
	} else if (0 == strcmp("vbnvcontext", cmd)) {
		uint8_t block[EC_VBNV_BLOCK_SIZE];
		char buf[3];
		int i, len;
		unsigned long result;

		if (argc <= 2) {
			ret = cros_ec_read_vbnvcontext(dev, block);
			if (!ret) {
				printf("vbnv_block: ");
				for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
					printf("%02x", block[i]);
				putc('\n');
			}
		} else {
			/*
			 * TODO(clchiou): Move this to a utility function as
			 * cmd_spi might want to call it.
			 */
			memset(block, 0, EC_VBNV_BLOCK_SIZE);
			len = strlen(argv[2]);
			buf[2] = '\0';
			for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
				if (i * 2 >= len)
					break;
				buf[0] = argv[2][i * 2];
				if (i * 2 + 1 >= len)
					buf[1] = '0';
				else
					buf[1] = argv[2][i * 2 + 1];
				strict_strtoul(buf, 16, &result);
				block[i] = result;
			}
			ret = cros_ec_write_vbnvcontext(dev, block);
		}
		if (ret) {
			debug("%s: Could not %s VbNvContext\n", __func__,
					argc <= 2 ?  "read" : "write");
		}
	} else if (0 == strcmp("test", cmd)) {
		int result = cros_ec_test(dev);

		if (result)
			printf("Test failed with error %d\n", result);
		else
			puts("Test passed\n");
	} else if (0 == strcmp("version", cmd)) {
		struct ec_response_get_version *p;
		char *build_string;

		ret = cros_ec_read_version(dev, &p);
		if (!ret) {
			/* Print versions */
			printf("RO version:    %1.*s\n",
			       (int)sizeof(p->version_string_ro),
			       p->version_string_ro);
			printf("RW version:    %1.*s\n",
			       (int)sizeof(p->version_string_rw),
			       p->version_string_rw);
			printf("Firmware copy: %s\n",
				(p->current_image <
					ARRAY_SIZE(ec_current_image_name) ?
				ec_current_image_name[p->current_image] :
				"?"));
			ret = cros_ec_read_build_info(dev, &build_string);
			if (!ret)
				printf("Build info:    %s\n", build_string);
		}
	} else if (0 == strcmp("ldo", cmd)) {
		uint8_t index, state;
		char *endp;

		if (argc < 3)
			return CMD_RET_USAGE;
		index = simple_strtoul(argv[2], &endp, 10);
		if (*argv[2] == 0 || *endp != 0)
			return CMD_RET_USAGE;
		if (argc > 3) {
			state = simple_strtoul(argv[3], &endp, 10);
			if (*argv[3] == 0 || *endp != 0)
				return CMD_RET_USAGE;
			ret = cros_ec_set_ldo(dev, index, state);
		} else {
			ret = cros_ec_get_ldo(dev, index, &state);
			if (!ret) {
				printf("LDO%d: %s\n", index,
					state == EC_LDO_STATE_ON ?
					"on" : "off");
			}
		}

		if (ret) {
			debug("%s: Could not access LDO%d\n", __func__, index);
			return ret;
		}
	} else if (0 == strcmp("i2c", cmd)) {
		ret = cros_ec_i2c_passthrough(dev, flag, argc - 2, argv + 2);
	} else {
		return CMD_RET_USAGE;
	}

	if (ret < 0) {
		printf("Error: CROS-EC command failed (error %d)\n", ret);
		ret = 1;
	}

	return ret;
}

U_BOOT_CMD(
	crosec,	6,	1,	do_cros_ec,
	"CROS-EC utility command",
	"init                Re-init CROS-EC (done on startup automatically)\n"
	"crosec id                  Read CROS-EC ID\n"
	"crosec info                Read CROS-EC info\n"
	"crosec curimage            Read CROS-EC current image\n"
	"crosec hash                Read CROS-EC hash\n"
	"crosec reboot [rw | ro | cold]  Reboot CROS-EC\n"
	"crosec events              Read CROS-EC host events\n"
	"crosec clrevents [mask]    Clear CROS-EC host events\n"
	"crosec regioninfo <ro|rw>  Read image info\n"
	"crosec erase <ro|rw>       Erase EC image\n"
	"crosec read <ro|rw> <addr> [<size>]   Read EC image\n"
	"crosec write <ro|rw> <addr> [<size>]  Write EC image\n"
	"crosec vbnvcontext [hexstring]        Read [write] VbNvContext from EC\n"
	"crosec ldo <idx> [<state>] Switch/Read LDO state\n"
	"crosec test                run tests on cros_ec\n"
	"crosec version             Read CROS-EC version\n"
	"crosec i2c md chip address[.0, .1, .2] [# of objects] - read from I2C passthru\n"
	"crosec i2c mw chip address[.0, .1, .2] value [count] - write to I2C passthru (fill)"
);
#endif

#ifdef CONFIG_DM_CROS_EC
UCLASS_DRIVER(cros_ec) = {
	.id		= UCLASS_CROS_EC,
	.name		= "cros_ec",
	.per_device_auto_alloc_size = sizeof(struct cros_ec_dev),
};
#endif