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@@ -0,0 +1,134 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright (c), Vaisala Oyj
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+ */
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+
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+#include <common.h>
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+#include <dm.h>
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+#include <dm/device_compat.h>
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+#include <dm/devres.h>
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+#include <exports.h>
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+#include <reboot-mode/reboot-mode.h>
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+
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+DECLARE_GLOBAL_DATA_PTR;
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+
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+int dm_reboot_mode_update(struct udevice *dev)
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+{
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+ struct reboot_mode_ops *ops = reboot_mode_get_ops(dev);
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+ u32 rebootmode;
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+ int ret, i;
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+
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+ assert(ops);
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+
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+ if (!ops->get)
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+ return -ENOSYS;
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+
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+ ret = ops->get(dev, &rebootmode);
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+ if (ret < 0) {
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+ dev_err(dev, "Failed to retrieve the reboot mode value\n");
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+ return ret;
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+ }
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+
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+ const struct reboot_mode_uclass_platdata *plat_data =
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+ dev_get_uclass_plat(dev);
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+
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+ for (i = 0; i < plat_data->count; i++) {
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+ if (plat_data->modes[i].mode_id == rebootmode) {
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+ ret = env_set(plat_data->env_variable,
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+ plat_data->modes[i].mode_name);
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+ if (ret) {
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+ dev_err(dev, "Failed to set env: %s\n",
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+ plat_data->env_variable);
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+ return ret;
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+ }
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+ }
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+ }
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+
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+ if (ops->set) {
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+ /* Clear the value */
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+ rebootmode = 0;
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+ ret = ops->set(dev, rebootmode);
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+ if (ret) {
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+ dev_err(dev, "Failed to clear the reboot mode\n");
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+ return ret;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+int dm_reboot_mode_pre_probe(struct udevice *dev)
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+{
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+ struct reboot_mode_uclass_platdata *plat_data;
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+
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+ plat_data = dev_get_uclass_plat(dev);
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+ if (!plat_data)
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+ return -EINVAL;
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+
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+#if CONFIG_IS_ENABLED(OF_CONTROL)
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+ const int node = dev_of_offset(dev);
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+ const char *mode_prefix = "mode-";
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+ const int mode_prefix_len = strlen(mode_prefix);
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+ int property;
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+ const u32 *propvalue;
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+ const char *propname;
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+
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+ plat_data->env_variable = fdt_getprop(gd->fdt_blob,
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+ node,
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+ "u-boot,env-variable",
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+ NULL);
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+ if (!plat_data->env_variable)
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+ plat_data->env_variable = "reboot-mode";
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+
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+ plat_data->count = 0;
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+
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+ fdt_for_each_property_offset(property, gd->fdt_blob, node) {
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+ propvalue = fdt_getprop_by_offset(gd->fdt_blob,
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+ property, &propname, NULL);
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+ if (!propvalue) {
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+ dev_err(dev, "Could not get the value for property %s\n",
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+ propname);
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+ return -EINVAL;
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+ }
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+
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+ if (!strncmp(propname, mode_prefix, mode_prefix_len))
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+ plat_data->count++;
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+ }
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+
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+ plat_data->modes = devm_kcalloc(dev, plat_data->count,
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+ sizeof(struct reboot_mode_mode), 0);
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+
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+ struct reboot_mode_mode *next = plat_data->modes;
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+
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+ fdt_for_each_property_offset(property, gd->fdt_blob, node) {
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+ propvalue = fdt_getprop_by_offset(gd->fdt_blob,
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+ property, &propname, NULL);
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+ if (!propvalue) {
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+ dev_err(dev, "Could not get the value for property %s\n",
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+ propname);
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+ return -EINVAL;
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+ }
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+
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+ if (!strncmp(propname, mode_prefix, mode_prefix_len)) {
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+ next->mode_name = &propname[mode_prefix_len];
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+ next->mode_id = fdt32_to_cpu(*propvalue);
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+
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+ next++;
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+ }
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+ }
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+#else
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+ if (!plat_data->env_variable)
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+ plat_data->env_variable = "reboot-mode";
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+
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+#endif
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+
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+ return 0;
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+}
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+
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+UCLASS_DRIVER(reboot_mode) = {
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+ .name = "reboot-mode",
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+ .id = UCLASS_REBOOT_MODE,
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+ .pre_probe = dm_reboot_mode_pre_probe,
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+ .per_device_plat_auto =
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+ sizeof(struct reboot_mode_uclass_platdata),
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+};
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