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Diffstat (limited to 'roms/u-boot/board/gateworks/venice/gsc.c')
-rw-r--r--roms/u-boot/board/gateworks/venice/gsc.c676
1 files changed, 676 insertions, 0 deletions
diff --git a/roms/u-boot/board/gateworks/venice/gsc.c b/roms/u-boot/board/gateworks/venice/gsc.c
new file mode 100644
index 000000000..d2490e606
--- /dev/null
+++ b/roms/u-boot/board/gateworks/venice/gsc.c
@@ -0,0 +1,676 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Gateworks Corporation
+ */
+
+#include <common.h>
+#include <command.h>
+#include <hang.h>
+#include <hexdump.h>
+#include <i2c.h>
+#include <linux/delay.h>
+#include <dm/uclass.h>
+
+#include "gsc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct venice_board_info som_info;
+struct venice_board_info base_info;
+char venice_model[32];
+
+/* return a mac address from EEPROM info */
+int gsc_getmac(int index, uint8_t *address)
+{
+ int i, j;
+ u32 maclow, machigh;
+ u64 mac;
+
+ j = 0;
+ if (som_info.macno) {
+ maclow = som_info.mac[5];
+ maclow |= som_info.mac[4] << 8;
+ maclow |= som_info.mac[3] << 16;
+ maclow |= som_info.mac[2] << 24;
+ machigh = som_info.mac[1];
+ machigh |= som_info.mac[0] << 8;
+ mac = machigh;
+ mac <<= 32;
+ mac |= maclow;
+ for (i = 0; i < som_info.macno; i++, j++) {
+ if (index == j)
+ goto out;
+ }
+ }
+
+ maclow = base_info.mac[5];
+ maclow |= base_info.mac[4] << 8;
+ maclow |= base_info.mac[3] << 16;
+ maclow |= base_info.mac[2] << 24;
+ machigh = base_info.mac[1];
+ machigh |= base_info.mac[0] << 8;
+ mac = machigh;
+ mac <<= 32;
+ mac |= maclow;
+ for (i = 0; i < base_info.macno; i++, j++) {
+ if (index == j)
+ goto out;
+ }
+
+ return -EINVAL;
+
+out:
+ mac += i;
+ address[0] = (mac >> 40) & 0xff;
+ address[1] = (mac >> 32) & 0xff;
+ address[2] = (mac >> 24) & 0xff;
+ address[3] = (mac >> 16) & 0xff;
+ address[4] = (mac >> 8) & 0xff;
+ address[5] = (mac >> 0) & 0xff;
+
+ return 0;
+}
+
+/* System Controller registers */
+enum {
+ GSC_SC_CTRL0 = 0,
+ GSC_SC_CTRL1 = 1,
+ GSC_SC_STATUS = 10,
+ GSC_SC_FWCRC = 12,
+ GSC_SC_FWVER = 14,
+ GSC_SC_WP = 15,
+ GSC_SC_RST_CAUSE = 16,
+ GSC_SC_THERM_PROTECT = 19,
+};
+
+/* System Controller Control1 bits */
+enum {
+ GSC_SC_CTRL1_WDTIME = 4, /* 1 = 60s timeout, 0 = 30s timeout */
+ GSC_SC_CTRL1_WDEN = 5, /* 1 = enable, 0 = disable */
+ GSC_SC_CTRL1_BOOT_CHK = 6, /* 1 = enable alt boot check */
+ GSC_SC_CTRL1_WDDIS = 7, /* 1 = disable boot watchdog */
+};
+
+/* System Controller Interrupt bits */
+enum {
+ GSC_SC_IRQ_PB = 0, /* Pushbutton switch */
+ GSC_SC_IRQ_SECURE = 1, /* Secure Key erase operation complete */
+ GSC_SC_IRQ_EEPROM_WP = 2, /* EEPROM write violation */
+ GSC_SC_IRQ_GPIO = 4, /* GPIO change */
+ GSC_SC_IRQ_TAMPER = 5, /* Tamper detect */
+ GSC_SC_IRQ_WATCHDOG = 6, /* Watchdog trip */
+ GSC_SC_IRQ_PBLONG = 7, /* Pushbutton long hold */
+};
+
+/* System Controller WP bits */
+enum {
+ GSC_SC_WP_ALL = 0, /* Write Protect All EEPROM regions */
+ GSC_SC_WP_BOARDINFO = 1, /* Write Protect Board Info region */
+};
+
+/* System Controller Reset Cause */
+enum {
+ GSC_SC_RST_CAUSE_VIN = 0,
+ GSC_SC_RST_CAUSE_PB = 1,
+ GSC_SC_RST_CAUSE_WDT = 2,
+ GSC_SC_RST_CAUSE_CPU = 3,
+ GSC_SC_RST_CAUSE_TEMP_LOCAL = 4,
+ GSC_SC_RST_CAUSE_TEMP_REMOTE = 5,
+ GSC_SC_RST_CAUSE_SLEEP = 6,
+ GSC_SC_RST_CAUSE_BOOT_WDT = 7,
+ GSC_SC_RST_CAUSE_BOOT_WDT_MAN = 8,
+ GSC_SC_RST_CAUSE_SOFT_PWR = 9,
+ GSC_SC_RST_CAUSE_MAX = 10,
+};
+
+static struct udevice *gsc_get_dev(int busno, int slave)
+{
+ static const char * const i2c[] = { "i2c@30a20000", "i2c@30a30000" };
+ struct udevice *dev, *bus;
+ int ret;
+
+ ret = uclass_get_device_by_name(UCLASS_I2C, i2c[busno - 1], &bus);
+ if (ret) {
+ printf("GSC : failed I2C%d probe: %d\n", busno, ret);
+ return NULL;
+ }
+ ret = dm_i2c_probe(bus, slave, 0, &dev);
+ if (ret)
+ return NULL;
+
+ return dev;
+}
+
+static int gsc_read_eeprom(int bus, int slave, int alen, struct venice_board_info *info)
+{
+ int i;
+ int chksum;
+ unsigned char *buf = (unsigned char *)info;
+ struct udevice *dev;
+ int ret;
+
+ /* probe device */
+ dev = gsc_get_dev(bus, slave);
+ if (!dev) {
+ if (slave == GSC_EEPROM_ADDR)
+ puts("ERROR: Failed to probe EEPROM\n");
+ return -ENODEV;
+ }
+
+ /* read eeprom config section */
+ memset(info, 0, sizeof(*info));
+ ret = i2c_set_chip_offset_len(dev, alen);
+ if (ret) {
+ puts("EEPROM: Failed to set alen\n");
+ return ret;
+ }
+ ret = dm_i2c_read(dev, 0x00, buf, sizeof(*info));
+ if (ret) {
+ if (slave == GSC_EEPROM_ADDR)
+ printf("EEPROM: Failed to read EEPROM\n");
+ return ret;
+ }
+
+ /* validate checksum */
+ for (chksum = 0, i = 0; i < (int)sizeof(*info) - 2; i++)
+ chksum += buf[i];
+ if ((info->chksum[0] != chksum >> 8) ||
+ (info->chksum[1] != (chksum & 0xff))) {
+ printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", bus, slave);
+ print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
+ memset(info, 0, sizeof(*info));
+ return -EINVAL;
+ }
+
+ /* sanity check valid model */
+ if (info->model[0] != 'G' || info->model[1] != 'W') {
+ printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", bus, slave);
+ print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
+ memset(info, 0, sizeof(*info));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const char *gsc_get_rst_cause(struct udevice *dev)
+{
+ static char str[64];
+ static const char * const names[] = {
+ "VIN",
+ "PB",
+ "WDT",
+ "CPU",
+ "TEMP_L",
+ "TEMP_R",
+ "SLEEP",
+ "BOOT_WDT1",
+ "BOOT_WDT2",
+ "SOFT_PWR",
+ };
+ unsigned char reg;
+
+ /* reset cause */
+ str[0] = 0;
+ if (!dm_i2c_read(dev, GSC_SC_RST_CAUSE, &reg, 1)) {
+ if (reg < ARRAY_SIZE(names))
+ sprintf(str, "%s", names[reg]);
+ else
+ sprintf(str, "0x%02x", reg);
+ }
+
+ /* thermal protection */
+ if (!dm_i2c_read(dev, GSC_SC_THERM_PROTECT, &reg, 1)) {
+ reg |= 1;
+ dm_i2c_write(dev, GSC_SC_THERM_PROTECT, &reg, 1);
+ strcat(str, " Thermal Protection Enabled");
+ }
+
+ return str;
+}
+
+/* display hardware monitor ADC channels */
+int gsc_hwmon(void)
+{
+ const void *fdt = gd->fdt_blob;
+ struct udevice *dev;
+ int node, reg, mode, len, val, offset;
+ const char *label;
+ u8 buf[2];
+ int ret;
+
+ node = fdt_node_offset_by_compatible(fdt, -1, "gw,gsc-adc");
+ if (node <= 0)
+ return node;
+
+ /* probe device */
+ dev = gsc_get_dev(1, GSC_HWMON_ADDR);
+ if (!dev) {
+ puts("ERROR: Failed to probe GSC HWMON\n");
+ return -ENODEV;
+ }
+
+ /* iterate over hwmon nodes */
+ node = fdt_first_subnode(fdt, node);
+ while (node > 0) {
+ reg = fdtdec_get_int(fdt, node, "reg", -1);
+ mode = fdtdec_get_int(fdt, node, "gw,mode", -1);
+ offset = fdtdec_get_int(fdt, node, "gw,voltage-offset-microvolt", 0);
+ label = fdt_stringlist_get(fdt, node, "label", 0, NULL);
+
+ if ((reg == -1) || (mode == -1) || !label)
+ printf("invalid dt:%s\n", fdt_get_name(fdt, node, NULL));
+
+ memset(buf, 0, sizeof(buf));
+ ret = dm_i2c_read(dev, reg, buf, sizeof(buf));
+ if (ret) {
+ printf("i2c error: %d\n", ret);
+ continue;
+ }
+ val = buf[0] | buf[1] << 8;
+ if (val >= 0) {
+ const u32 *div;
+ int r[2];
+
+ switch (mode) {
+ case 0: /* temperature (C*10) */
+ if (val > 0x8000)
+ val -= 0xffff;
+ printf("%-8s: %d.%ldC\n", label, val / 10, abs(val % 10));
+ break;
+ case 1: /* prescaled voltage */
+ if (val != 0xffff)
+ printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
+ break;
+ case 2: /* scaled based on ref volt and resolution */
+ val *= 2500;
+ val /= 1 << 12;
+
+ /* apply pre-scaler voltage divider */
+ div = fdt_getprop(fdt, node, "gw,voltage-divider-ohms", &len);
+ if (div && (len == sizeof(uint32_t) * 2)) {
+ r[0] = fdt32_to_cpu(div[0]);
+ r[1] = fdt32_to_cpu(div[1]);
+ if (r[0] && r[1]) {
+ val *= (r[0] + r[1]);
+ val /= r[1];
+ }
+ }
+
+ /* adjust by offset */
+ val += offset;
+
+ printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
+ break;
+ }
+ }
+ node = fdt_next_subnode(fdt, node);
+ }
+
+ return 0;
+}
+
+/* determine BOM revision from model */
+int get_bom_rev(const char *str)
+{
+ int rev_bom = 0;
+ int i;
+
+ for (i = strlen(str) - 1; i > 0; i--) {
+ if (str[i] == '-')
+ break;
+ if (str[i] >= '1' && str[i] <= '9') {
+ rev_bom = str[i] - '0';
+ break;
+ }
+ }
+ return rev_bom;
+}
+
+/* determine PCB revision from model */
+char get_pcb_rev(const char *str)
+{
+ char rev_pcb = 'A';
+ int i;
+
+ for (i = strlen(str) - 1; i > 0; i--) {
+ if (str[i] == '-')
+ break;
+ if (str[i] >= 'A') {
+ rev_pcb = str[i];
+ break;
+ }
+ }
+ return rev_pcb;
+}
+
+/*
+ * get dt name based on model and detail level:
+ *
+ * For boards that are a combination of a SoM plus a Baseboard:
+ * Venice SoM part numbers are GW70xx where xx is:
+ * 7000-7019: same PCB with som dt of '0x'
+ * 7020-7039: same PCB with som dt of '2x'
+ * 7040-7059: same PCB with som dt of '4x'
+ * 7060-7079: same PCB with som dt of '6x'
+ * 7080-7099: same PCB with som dt of '8x'
+ * Venice Baseboard part numbers are GW7xxx where xxx is:
+ * 7100-7199: same PCB with base dt of '71xx'
+ * 7200-7299: same PCB with base dt of '72xx'
+ * 7300-7399: same PCB with base dt of '73xx'
+ * 7400-7499: same PCB with base dt of '74xx'
+ * 7500-7599: same PCB with base dt of '75xx'
+ * 7600-7699: same PCB with base dt of '76xx'
+ * 7700-7799: same PCB with base dt of '77xx'
+ * 7800-7899: same PCB with base dt of '78xx'
+ * DT name is comprised of:
+ * gw<base dt>-<som dt>-[base-pcb-rev][base-bom-rev][som-pcb-rev][som-bom-rev]
+ *
+ * For board models from 7900-7999 each PCB is unique with its own dt:
+ * DT name is comprised:
+ * gw<model>-[pcb-rev][bom-rev]
+ *
+ */
+#define snprintfcat(dest, sz, fmt, ...) \
+ snprintf((dest) + strlen(dest), (sz) - strlen(dest), fmt, ##__VA_ARGS__)
+const char *gsc_get_dtb_name(int level, char *buf, int sz)
+{
+ const char *pre = "imx8mm-venice-gw";
+ int model, rev_pcb, rev_bom;
+
+ model = ((som_info.model[2] - '0') * 1000)
+ + ((som_info.model[3] - '0') * 100)
+ + ((som_info.model[4] - '0') * 10)
+ + (som_info.model[5] - '0');
+ rev_pcb = tolower(get_pcb_rev(som_info.model));
+ rev_bom = get_bom_rev(som_info.model);
+
+ /* som + baseboard*/
+ if (base_info.model[0]) {
+ /* baseboard id: 7100-7199->71; 7200-7299->72; etc */
+ int base = ((base_info.model[2] - '0') * 10) + (base_info.model[3] - '0');
+ /* som id: 7000-7019->1; 7020-7039->2; etc */
+ int som = ((model % 100) / 20) * 2;
+ int rev_base_pcb = tolower(get_pcb_rev(base_info.model));
+ int rev_base_bom = get_bom_rev(base_info.model);
+
+ snprintf(buf, sz, "%s%2dxx-%dx", pre, base, som);
+ switch (level) {
+ case 0: /* full model (ie gw73xx-0x-a1a1) */
+ if (rev_base_bom)
+ snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
+ else
+ snprintfcat(buf, sz, "-%c", rev_base_pcb);
+ if (rev_bom)
+ snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
+ else
+ snprintfcat(buf, sz, "%c", rev_pcb);
+ break;
+ case 1: /* don't care about SoM revision */
+ if (rev_base_bom)
+ snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
+ else
+ snprintfcat(buf, sz, "-%c", rev_base_pcb);
+ snprintfcat(buf, sz, "xx");
+ break;
+ case 2: /* don't care about baseboard revision */
+ snprintfcat(buf, sz, "-xx");
+ if (rev_bom)
+ snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
+ else
+ snprintfcat(buf, sz, "%c", rev_pcb);
+ break;
+ case 3: /* don't care about SoM/baseboard revision */
+ break;
+ default:
+ return NULL;
+ }
+ } else {
+ snprintf(buf, sz, "%s%04d", pre, model);
+ switch (level) {
+ case 0: /* full model wth PCB and BOM revision first (ie gw7901-a1) */
+ if (rev_bom)
+ snprintfcat(buf, sz, "-%c%d", rev_pcb, rev_bom);
+ else
+ snprintfcat(buf, sz, "-%c", rev_pcb);
+ break;
+ case 1: /* don't care about BOM revision */
+ snprintfcat(buf, sz, "-%c", rev_pcb);
+ break;
+ case 2: /* don't care about PCB or BOM revision */
+ break;
+ default:
+ return NULL;
+ }
+ }
+
+ return buf;
+}
+
+static int gsc_read(void)
+{
+ int ret;
+
+ ret = gsc_read_eeprom(1, GSC_EEPROM_ADDR, 1, &som_info);
+ if (ret) {
+ memset(&som_info, 0, sizeof(som_info));
+ return ret;
+ }
+
+ /* read optional baseboard EEPROM */
+ return gsc_read_eeprom(2, 0x52, 2, &base_info);
+}
+
+static int gsc_info(int verbose)
+{
+ struct udevice *dev;
+ unsigned char buf[16];
+ char rev_pcb;
+ int rev_bom;
+
+ if (!base_info.model[0]) {
+ strcpy(venice_model, som_info.model);
+ printf("Model : %s\n", som_info.model);
+ printf("Serial : %d\n", som_info.serial);
+ printf("MFGDate : %02x-%02x-%02x%02x\n",
+ som_info.mfgdate[0], som_info.mfgdate[1],
+ som_info.mfgdate[2], som_info.mfgdate[3]);
+ } else {
+ sprintf(venice_model, "GW%c%c%c%c-%c%c-",
+ som_info.model[2], /* family */
+ base_info.model[3], /* baseboard */
+ base_info.model[4], base_info.model[5], /* subload of baseboard */
+ som_info.model[4], som_info.model[5]); /* last 2digits of SOM */
+
+ /* baseboard revision */
+ rev_pcb = get_pcb_rev(base_info.model);
+ rev_bom = get_bom_rev(base_info.model);
+ if (rev_bom)
+ sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
+ else
+ sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
+ /* som revision */
+ rev_pcb = get_pcb_rev(som_info.model);
+ rev_bom = get_bom_rev(som_info.model);
+ if (rev_bom)
+ sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
+ else
+ sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
+
+ if (verbose > 1) {
+ printf("SOM : %s %d %02x-%02x-%02x%02x\n",
+ som_info.model, som_info.serial,
+ som_info.mfgdate[0], som_info.mfgdate[1],
+ som_info.mfgdate[2], som_info.mfgdate[3]);
+ printf("BASE : %s %d %02x-%02x-%02x%02x\n",
+ base_info.model, base_info.serial,
+ base_info.mfgdate[0], base_info.mfgdate[1],
+ base_info.mfgdate[2], base_info.mfgdate[3]);
+ }
+ printf("Model : %s\n", venice_model);
+ printf("Serial : %d\n", som_info.serial);
+ printf("MFGDate : %02x-%02x-%02x%02x\n",
+ som_info.mfgdate[0], som_info.mfgdate[1],
+ som_info.mfgdate[2], som_info.mfgdate[3]);
+ }
+
+ /* Display RTC */
+ puts("RTC : ");
+ dev = gsc_get_dev(1, GSC_RTC_ADDR);
+ if (!dev) {
+ puts("Failed to probe GSC RTC\n");
+ } else {
+ dm_i2c_read(dev, 0, buf, 6);
+ printf("%d\n", buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
+ }
+
+ return 0;
+}
+
+int gsc_init(int quiet)
+{
+ unsigned char buf[16];
+ struct udevice *dev;
+ int ret;
+
+ /*
+ * On a board with a missing/depleted backup battery for GSC, the
+ * board may be ready to probe the GSC before its firmware is
+ * running. We will wait here indefinately for the GSC/EEPROM.
+ */
+ while (1) {
+ /* probe device */
+ dev = gsc_get_dev(1, GSC_SC_ADDR);
+ if (dev)
+ break;
+ mdelay(1);
+ }
+
+ ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
+ if (ret) {
+ puts("ERROR: Failed reading GSC\n");
+ return ret;
+ }
+ gsc_read();
+
+ /* banner */
+ if (!quiet) {
+ printf("GSC : v%d 0x%04x", buf[GSC_SC_FWVER],
+ buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC + 1] << 8);
+ printf(" RST:%s", gsc_get_rst_cause(dev));
+ printf("\n");
+ gsc_info(1);
+ }
+
+ if (ret)
+ hang();
+
+ return ((16 << som_info.sdram_size) / 1024);
+}
+
+const char *gsc_get_model(void)
+{
+ return venice_model;
+}
+
+#if !(IS_ENABLED(CONFIG_SPL_BUILD))
+static int gsc_sleep(unsigned long secs)
+{
+ unsigned char reg;
+ struct udevice *dev;
+ int ret;
+
+ /* probe device */
+ dev = gsc_get_dev(1, GSC_SC_ADDR);
+ if (!dev)
+ return -ENODEV;
+
+ printf("GSC Sleeping for %ld seconds\n", secs);
+ reg = (secs >> 24) & 0xff;
+ ret = dm_i2c_write(dev, 9, &reg, 1);
+ if (ret)
+ goto err;
+ reg = (secs >> 16) & 0xff;
+ ret = dm_i2c_write(dev, 8, &reg, 1);
+ if (ret)
+ goto err;
+ reg = (secs >> 8) & 0xff;
+ ret = dm_i2c_write(dev, 7, &reg, 1);
+ if (ret)
+ goto err;
+ reg = secs & 0xff;
+ ret = dm_i2c_write(dev, 6, &reg, 1);
+ if (ret)
+ goto err;
+ ret = dm_i2c_read(dev, GSC_SC_CTRL1, &reg, 1);
+ if (ret)
+ goto err;
+ reg |= (1 << 2);
+ ret = dm_i2c_write(dev, GSC_SC_CTRL1, &reg, 1);
+ if (ret)
+ goto err;
+ reg &= ~(1 << 2);
+ reg |= 0x3;
+ ret = dm_i2c_write(dev, GSC_SC_CTRL1, &reg, 1);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ printf("i2c error\n");
+ return ret;
+}
+
+static int gsc_boot_wd_disable(void)
+{
+ u8 reg;
+ struct udevice *dev;
+ int ret;
+
+ /* probe device */
+ dev = gsc_get_dev(1, GSC_SC_ADDR);
+ if (!dev)
+ return -ENODEV;
+
+ ret = dm_i2c_read(dev, GSC_SC_CTRL1, &reg, 1);
+ if (ret)
+ goto err;
+ reg |= (1 << GSC_SC_CTRL1_WDDIS);
+ reg &= ~(1 << GSC_SC_CTRL1_BOOT_CHK);
+ ret = dm_i2c_write(dev, GSC_SC_CTRL1, &reg, 1);
+ if (ret)
+ goto err;
+ puts("GSC : boot watchdog disabled\n");
+
+ return 0;
+
+err:
+ printf("i2c error");
+ return ret;
+}
+
+static int do_gsc(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
+{
+ if (argc < 2)
+ return gsc_info(2);
+
+ if (strcasecmp(argv[1], "sleep") == 0) {
+ if (argc < 3)
+ return CMD_RET_USAGE;
+ if (!gsc_sleep(simple_strtoul(argv[2], NULL, 10)))
+ return CMD_RET_SUCCESS;
+ } else if (strcasecmp(argv[1], "hwmon") == 0) {
+ if (!gsc_hwmon())
+ return CMD_RET_SUCCESS;
+ } else if (strcasecmp(argv[1], "wd-disable") == 0) {
+ if (!gsc_boot_wd_disable())
+ return CMD_RET_SUCCESS;
+ }
+
+ return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(gsc, 4, 1, do_gsc, "Gateworks System Controller",
+ "[sleep <secs>]|[hwmon]|[wd-disable]\n");
+#endif