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firmware: xilinx: Add sysfs and API to set boot health status

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Add sysfs interface to set boot health status from user space.
Add API used by this interface to communicate with firmware.

If PMUFW is compiled with CHECK_HEALTHY_BOOT, it will check the
healthy bit on FPD WDT expiration. If healthy bit is set by a user
application running in Linux, PMUFW will do APU only restart. If
healthy bit is not set during FPD WDT expiration, PMUFW will do
system restart.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-26-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rajan Vaja
2020-04-24 13:58:07 -07:00
committed by Greg Kroah-Hartman
parent b3ae24c448
commit a2cc220a9a
3 changed files with 67 additions and 0 deletions
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7
include/linux/firmware/xlnx-zynqmp.h
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@@ -114,6 +114,8 @@ enum pm_ioctl_id {
IOCTL_READ_GGS = 13,
IOCTL_WRITE_PGGS = 14,
IOCTL_READ_PGGS = 15,
/* Set healthy bit value */
IOCTL_SET_BOOT_HEALTH_STATUS = 17,
};
enum pm_query_id {
@@ -354,6 +356,7 @@ int zynqmp_pm_read_ggs(u32 index, u32 *value);
int zynqmp_pm_write_pggs(u32 index, u32 value);
int zynqmp_pm_read_pggs(u32 index, u32 *value);
int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
int zynqmp_pm_set_boot_health_status(u32 value);
#else
static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
@@ -500,6 +503,10 @@ static inline int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)
{
return -ENODEV;
}
static inline int zynqmp_pm_set_boot_health_status(u32 value)
{
return -ENODEV;
}
#endif
#endif /* __FIRMWARE_ZYNQMP_H__ */