From: Tejas Patel <[email protected]>
Add support to get last reason using IOCTL API. Also validate IOCTL
ID for Versal or ZynqMP platforms before calling
zynqmp_pm_invoke_fn().
Signed-off-by: Tejas Patel <[email protected]>
Signed-off-by: Amit Sunil Dhamne <[email protected]>
---
drivers/firmware/xilinx/zynqmp.c | 20 ++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 7 +++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 8fe0912..c5db34f 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -533,6 +533,7 @@ static inline int versal_is_valid_ioctl(u32 ioctl_id)
case IOCTL_WRITE_PGGS:
case IOCTL_READ_PGGS:
case IOCTL_SET_BOOT_HEALTH_STATUS:
+ case IOCTL_GET_LAST_RESET_REASON:
return 1;
default:
return 0;
@@ -772,6 +773,25 @@ int zynqmp_pm_set_boot_health_status(u32 value)
}
/**
+ * zynqmp_pm_get_last_reset_reason() - PM API for getting last reset reason
+ *
+ * @reset_reason: last reset reason
+ *
+ * This function returns last reset reason
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_get_last_reset_reason(u32 *reset_reason)
+{
+ if (!reset_reason)
+ return -EINVAL;
+
+ return zynqmp_pm_ioctl(0, IOCTL_GET_LAST_RESET_REASON, 0, 0,
+ reset_reason);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_get_last_reset_reason);
+
+/**
* zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
* @reset: Reset to be configured
* @assert_flag: Flag stating should reset be asserted (1) or
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 5968df8..90c8664 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -116,6 +116,8 @@ enum pm_ioctl_id {
IOCTL_READ_PGGS = 15,
/* Set healthy bit value */
IOCTL_SET_BOOT_HEALTH_STATUS = 17,
+ /* IOCTL to get last reset reason */
+ IOCTL_GET_LAST_RESET_REASON = 23,
};
enum pm_query_id {
@@ -357,6 +359,7 @@ 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);
+int zynqmp_pm_get_last_reset_reason(u32 *reset_reason);
#else
static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
@@ -507,6 +510,10 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value)
{
return -ENODEV;
}
+static inline int zynqmp_pm_get_last_reset_reason(u32 *reset_reason)
+{
+ return -ENODEV;
+}
#endif
#endif /* __FIRMWARE_ZYNQMP_H__ */
--
2.7.4
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