diff options
| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2020-09-28 16:45:06 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-09-29 10:25:02 +0200 |
| commit | fc8511d20ab32a31e9502c54a28a3f7f55223f39 (patch) | |
| tree | fbc05fee8e84068489490060be1e3889c0b2b61c /include | |
| parent | 5a5c5178e7dc6a58a059fe4a1f4167a31809ccaf (diff) | |
| download | barebox-fc8511d20ab32a31e9502c54a28a3f7f55223f39.tar.gz barebox-fc8511d20ab32a31e9502c54a28a3f7f55223f39.tar.xz | |
drivers: add reboot-mode infrastructure
Reboot modes provide a well-defined way to exchange information between
different stage of the boot process. When configured, users can type
`reboot bootloader` in the OS and barebox can read it out a device
parameter. Likewise barebox can write a reboot mode for the BootROM to
evaluate and then reset to fall into a serial recovery mode for example.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/reboot-mode.h | 36 | ||||
| -rw-r--r-- | include/of.h | 2 |
2 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/reboot-mode.h b/include/linux/reboot-mode.h new file mode 100644 index 0000000000..92a1da7b55 --- /dev/null +++ b/include/linux/reboot-mode.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __REBOOT_MODE_H__ +#define __REBOOT_MODE_H__ + +#include <linux/types.h> + +struct device_d; + +#ifdef CONFIG_REBOOT_MODE +struct reboot_mode_driver { + struct device_d *dev; + int (*write)(struct reboot_mode_driver *reboot, u32 magic); + int priority; + + /* filled by reboot_mode_register */ + int reboot_mode_prev, reboot_mode_next; + unsigned nmodes; + const char **modes; + u32 *magics; +}; + +int reboot_mode_register(struct reboot_mode_driver *reboot, u32 reboot_mode); +const char *reboot_mode_get(void); + +#define REBOOT_MODE_DEFAULT_PRIORITY 100 + +#else + +static inline const char *reboot_mode_get(void) +{ + return NULL; +} + +#endif + +#endif diff --git a/include/of.h b/include/of.h index d548e51789..b9b3a10228 100644 --- a/include/of.h +++ b/include/of.h @@ -732,6 +732,8 @@ static inline int of_autoenable_i2c_by_component(char *path) #endif +#define for_each_property_of_node(dn, pp) \ + list_for_each_entry(pp, &dn->properties, list) #define for_each_node_by_name(dn, name) \ for (dn = of_find_node_by_name(NULL, name); dn; \ dn = of_find_node_by_name(dn, name)) |