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-rw-r--r--drivers/Kconfig2
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/reboot-mode/Kconfig36
-rw-r--r--drivers/reboot-mode/Makefile9
-rw-r--r--drivers/reboot-mode/reboot-mode-gpio.c128
-rw-r--r--drivers/reboot-mode/reboot-mode-rtc.c127
-rw-r--r--drivers/reboot-mode/reboot-mode-uclass.c134
7 files changed, 437 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index c9c812b7526..417d6f88c29 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -92,6 +92,8 @@ source "drivers/qe/Kconfig"
source "drivers/ram/Kconfig"
+source "drivers/reboot-mode/Kconfig"
+
source "drivers/remoteproc/Kconfig"
source "drivers/reset/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 40812891046..82d3c98e063 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -95,6 +95,7 @@ obj-y += dfu/
obj-$(CONFIG_PCH) += pch/
obj-y += phy/allwinner/
obj-y += phy/marvell/
+obj-$(CONFIG_DM_REBOOT_MODE) += reboot-mode/
obj-y += phy/rockchip/
obj-y += phy/socionext/
obj-y += rtc/
diff --git a/drivers/reboot-mode/Kconfig b/drivers/reboot-mode/Kconfig
new file mode 100644
index 00000000000..ac67bfcef62
--- /dev/null
+++ b/drivers/reboot-mode/Kconfig
@@ -0,0 +1,36 @@
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c), Vaisala Oyj
+#
+
+menu "Reboot Mode Support"
+
+config DM_REBOOT_MODE
+ bool "Enable reboot mode using Driver Model"
+ depends on DM
+ default n
+ help
+ Enable support for reboot mode control. This will allow users to
+ adjust the boot process based on reboot mode parameter
+ passed to U-Boot.
+
+config DM_REBOOT_MODE_GPIO
+ bool "Use GPIOs as reboot mode backend"
+ depends on DM_REBOOT_MODE
+ default n
+ help
+ Use GPIOs to control the reboot mode. This will allow users to boot
+ a device in a specific mode by using a GPIO that can be controlled
+ outside U-Boot.
+
+config DM_REBOOT_MODE_RTC
+ bool "Use RTC as reboot mode backend"
+ depends on DM_REBOOT_MODE
+ default n
+ help
+ Use RTC non volatile memory to control the reboot mode. This will allow users to boot
+ a device in a specific mode by using a register(s) that can be controlled
+ outside U-Boot (e.g. Kernel).
+
+endmenu
diff --git a/drivers/reboot-mode/Makefile b/drivers/reboot-mode/Makefile
new file mode 100644
index 00000000000..2c13780ced4
--- /dev/null
+++ b/drivers/reboot-mode/Makefile
@@ -0,0 +1,9 @@
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c), Vaisala Oyj
+#
+
+obj-$(CONFIG_DM_REBOOT_MODE) += reboot-mode-uclass.o
+obj-$(CONFIG_DM_REBOOT_MODE_GPIO) += reboot-mode-gpio.o
+obj-$(CONFIG_DM_REBOOT_MODE_RTC) += reboot-mode-rtc.o
diff --git a/drivers/reboot-mode/reboot-mode-gpio.c b/drivers/reboot-mode/reboot-mode-gpio.c
new file mode 100644
index 00000000000..305174736ed
--- /dev/null
+++ b/drivers/reboot-mode/reboot-mode-gpio.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c), Vaisala Oyj
+ */
+
+#include <common.h>
+#include <asm/gpio.h>
+#include <dm.h>
+#include <dm/devres.h>
+#include <errno.h>
+#include <reboot-mode/reboot-mode-gpio.h>
+#include <reboot-mode/reboot-mode.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int reboot_mode_get(struct udevice *dev, u32 *buf)
+{
+ int ret;
+ struct reboot_mode_gpio_platdata *plat_data;
+
+ if (!buf)
+ return -EINVAL;
+
+ plat_data = dev_get_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+ ret = dm_gpio_get_values_as_int(plat_data->gpio_desc,
+ plat_data->gpio_count);
+ if (ret < 0)
+ return ret;
+
+ *buf = ret;
+
+ return 0;
+}
+
+static int reboot_mode_probe(struct udevice *dev)
+{
+ struct reboot_mode_gpio_platdata *plat_data;
+
+ plat_data = dev_get_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+ int ret;
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ ret = gpio_get_list_count(dev, "gpios");
+ if (ret < 0)
+ return ret;
+
+ plat_data->gpio_count = ret;
+#endif
+
+ if (plat_data->gpio_count <= 0)
+ return -EINVAL;
+
+ plat_data->gpio_desc = devm_kcalloc(dev, plat_data->gpio_count,
+ sizeof(struct gpio_desc), 0);
+ if (!plat_data->gpio_desc)
+ return -ENOMEM;
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ ret = gpio_request_list_by_name(dev, "gpios", plat_data->gpio_desc,
+ plat_data->gpio_count, GPIOD_IS_IN);
+ if (ret < 0)
+ return ret;
+#else
+ for (int i = 0; i < plat_data->gpio_count; i++) {
+ struct reboot_mode_gpio_config *gpio =
+ plat_data->gpios_config + i;
+ struct gpio_desc *desc = plat_data->gpio_desc + i;
+
+ ret = uclass_get_device_by_seq(UCLASS_GPIO,
+ gpio->gpio_dev_offset,
+ &desc->dev);
+ if (ret < 0)
+ return ret;
+
+ desc->flags = gpio->flags;
+ desc->offset = gpio->gpio_offset;
+
+ ret = dm_gpio_request(desc, "");
+ if (ret < 0)
+ return ret;
+
+ ret = dm_gpio_set_dir(desc);
+ if (ret < 0)
+ return ret;
+ }
+#endif
+ return 0;
+}
+
+static int reboot_mode_remove(struct udevice *dev)
+{
+ struct reboot_mode_gpio_platdata *plat_data;
+
+ plat_data = dev_get_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+ return gpio_free_list(dev, plat_data->gpio_desc, plat_data->gpio_count);
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id reboot_mode_ids[] = {
+ { .compatible = "reboot-mode-gpio", 0 },
+ { }
+};
+#endif
+
+static const struct reboot_mode_ops reboot_mode_gpio_ops = {
+ .get = reboot_mode_get,
+};
+
+U_BOOT_DRIVER(reboot_mode_gpio) = {
+ .name = "reboot-mode-gpio",
+ .id = UCLASS_REBOOT_MODE,
+ .probe = reboot_mode_probe,
+ .remove = reboot_mode_remove,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = reboot_mode_ids,
+#endif
+ .plat_auto = sizeof(struct reboot_mode_gpio_platdata),
+ .ops = &reboot_mode_gpio_ops,
+};
diff --git a/drivers/reboot-mode/reboot-mode-rtc.c b/drivers/reboot-mode/reboot-mode-rtc.c
new file mode 100644
index 00000000000..972d0cdbcb5
--- /dev/null
+++ b/drivers/reboot-mode/reboot-mode-rtc.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c), Vaisala Oyj
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <reboot-mode/reboot-mode-rtc.h>
+#include <reboot-mode/reboot-mode.h>
+#include <rtc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int reboot_mode_get(struct udevice *dev, u32 *buf)
+{
+ if (!buf)
+ return -EINVAL;
+
+ int ret;
+ u8 *val = (u8 *)buf;
+ struct reboot_mode_rtc_platdata *plat_data;
+
+ plat_data = dev_get_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+ for (int i = 0; i < plat_data->size; i++) {
+ ret = rtc_read8(plat_data->rtc, plat_data->addr + i);
+ if (ret < 0)
+ return ret;
+
+ val[i] = ret;
+ }
+
+ if (plat_data->is_big_endian)
+ *buf = __be32_to_cpu(*buf);
+ else
+ *buf = __le32_to_cpu(*buf);
+
+ return 0;
+}
+
+static int reboot_mode_set(struct udevice *dev, u32 buf)
+{
+ int ret;
+ u8 *val;
+ struct reboot_mode_rtc_platdata *plat_data;
+
+ plat_data = dev_get_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+ if (plat_data->is_big_endian)
+ buf = __cpu_to_be32(buf);
+ else
+ buf = __cpu_to_le32(buf);
+
+ val = (u8 *)&buf;
+
+ for (int i = 0; i < plat_data->size; i++) {
+ ret = rtc_write8(plat_data->rtc, (plat_data->addr + i), val[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int reboot_mode_ofdata_to_platdata(struct udevice *dev)
+{
+ struct ofnode_phandle_args phandle_args;
+ struct reboot_mode_rtc_platdata *plat_data;
+
+ plat_data = dev_get_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+ if (dev_read_phandle_with_args(dev, "rtc", NULL, 0, 0, &phandle_args)) {
+ dev_err(dev, "RTC device not specified\n");
+ return -ENOENT;
+ }
+
+ if (uclass_get_device_by_ofnode(UCLASS_RTC, phandle_args.node,
+ &plat_data->rtc)) {
+ dev_err(dev, "could not get the RTC device\n");
+ return -ENODEV;
+ }
+
+ plat_data->addr =
+ dev_read_addr_size_index(dev, 0, (fdt_size_t *)&plat_data->size);
+ if (plat_data->addr == FDT_ADDR_T_NONE) {
+ dev_err(dev, "Invalid RTC address\n");
+ return -EINVAL;
+ }
+ if (plat_data->size > sizeof(u32)) {
+ dev_err(dev, "Invalid reg size\n");
+ return -EINVAL;
+ }
+
+ plat_data->is_big_endian = ofnode_read_bool(dev_ofnode(dev), "big-endian");
+
+ return 0;
+}
+
+static const struct udevice_id reboot_mode_ids[] = {
+ { .compatible = "reboot-mode-rtc", 0 },
+ {}
+};
+#endif
+
+static const struct reboot_mode_ops reboot_mode_rtc_ops = {
+ .get = reboot_mode_get,
+ .set = reboot_mode_set,
+};
+
+U_BOOT_DRIVER(reboot_mode_rtc) = {
+ .name = "reboot-mode-rtc",
+ .id = UCLASS_REBOOT_MODE,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = reboot_mode_ids,
+ .of_to_plat = reboot_mode_ofdata_to_platdata,
+#endif
+ .plat_auto = sizeof(struct reboot_mode_rtc_platdata),
+ .ops = &reboot_mode_rtc_ops,
+};
diff --git a/drivers/reboot-mode/reboot-mode-uclass.c b/drivers/reboot-mode/reboot-mode-uclass.c
new file mode 100644
index 00000000000..bb7a355fbf8
--- /dev/null
+++ b/drivers/reboot-mode/reboot-mode-uclass.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c), Vaisala Oyj
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <dm/devres.h>
+#include <exports.h>
+#include <reboot-mode/reboot-mode.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dm_reboot_mode_update(struct udevice *dev)
+{
+ struct reboot_mode_ops *ops = reboot_mode_get_ops(dev);
+ u32 rebootmode;
+ int ret, i;
+
+ assert(ops);
+
+ if (!ops->get)
+ return -ENOSYS;
+
+ ret = ops->get(dev, &rebootmode);
+ if (ret < 0) {
+ dev_err(dev, "Failed to retrieve the reboot mode value\n");
+ return ret;
+ }
+
+ const struct reboot_mode_uclass_platdata *plat_data =
+ dev_get_uclass_plat(dev);
+
+ for (i = 0; i < plat_data->count; i++) {
+ if (plat_data->modes[i].mode_id == rebootmode) {
+ ret = env_set(plat_data->env_variable,
+ plat_data->modes[i].mode_name);
+ if (ret) {
+ dev_err(dev, "Failed to set env: %s\n",
+ plat_data->env_variable);
+ return ret;
+ }
+ }
+ }
+
+ if (ops->set) {
+ /* Clear the value */
+ rebootmode = 0;
+ ret = ops->set(dev, rebootmode);
+ if (ret) {
+ dev_err(dev, "Failed to clear the reboot mode\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+int dm_reboot_mode_pre_probe(struct udevice *dev)
+{
+ struct reboot_mode_uclass_platdata *plat_data;
+
+ plat_data = dev_get_uclass_plat(dev);
+ if (!plat_data)
+ return -EINVAL;
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ const int node = dev_of_offset(dev);
+ const char *mode_prefix = "mode-";
+ const int mode_prefix_len = strlen(mode_prefix);
+ int property;
+ const u32 *propvalue;
+ const char *propname;
+
+ plat_data->env_variable = fdt_getprop(gd->fdt_blob,
+ node,
+ "u-boot,env-variable",
+ NULL);
+ if (!plat_data->env_variable)
+ plat_data->env_variable = "reboot-mode";
+
+ plat_data->count = 0;
+
+ fdt_for_each_property_offset(property, gd->fdt_blob, node) {
+ propvalue = fdt_getprop_by_offset(gd->fdt_blob,
+ property, &propname, NULL);
+ if (!propvalue) {
+ dev_err(dev, "Could not get the value for property %s\n",
+ propname);
+ return -EINVAL;
+ }
+
+ if (!strncmp(propname, mode_prefix, mode_prefix_len))
+ plat_data->count++;
+ }
+
+ plat_data->modes = devm_kcalloc(dev, plat_data->count,
+ sizeof(struct reboot_mode_mode), 0);
+
+ struct reboot_mode_mode *next = plat_data->modes;
+
+ fdt_for_each_property_offset(property, gd->fdt_blob, node) {
+ propvalue = fdt_getprop_by_offset(gd->fdt_blob,
+ property, &propname, NULL);
+ if (!propvalue) {
+ dev_err(dev, "Could not get the value for property %s\n",
+ propname);
+ return -EINVAL;
+ }
+
+ if (!strncmp(propname, mode_prefix, mode_prefix_len)) {
+ next->mode_name = &propname[mode_prefix_len];
+ next->mode_id = fdt32_to_cpu(*propvalue);
+
+ next++;
+ }
+ }
+#else
+ if (!plat_data->env_variable)
+ plat_data->env_variable = "reboot-mode";
+
+#endif
+
+ return 0;
+}
+
+UCLASS_DRIVER(reboot_mode) = {
+ .name = "reboot-mode",
+ .id = UCLASS_REBOOT_MODE,
+ .pre_probe = dm_reboot_mode_pre_probe,
+ .per_device_plat_auto =
+ sizeof(struct reboot_mode_uclass_platdata),
+};
generated by cgit v1.2.3 (git 2.0.4) at 2025-10-17 19:59:30 +0000