DCMD_F3S_LOCKSSR

Lock a secure silicon region

Synopsis:

#include <sys/dcmd_f3s.h>

#define DCMD_F3S_LOCKSSR    __DIOTF(_DCMD_F3S, F3S_LOCKSSR, uint32_t)

Argument	Value
`filedes`	A file descriptor that you obtained by opening /dev/fs0
`dcmd`	DCMD_F3S_LOCKSSR
`dev_data_ptr`	NULL, or a pointer to a uint32_t
`n_bytes`	0 or `sizeof(uint32_t)`
`dev_info_ptr`	NULL

This command locks a secure silicon region. You can:

Lock the entire SSR. For this case, the data pointer should be NULL, and n_bytes should be 0.
Lock a specific region. For this case, the data pointer should not be NULL, and n_bytes should be 1. Currently, we use 1 byte to store the number of the region.

The number of the region to lock, or NULL to lock the entire OTP area.

None.

The Spansion S25FL QSPI flash supports multiple regions in the OTP (SSR) area. Each region can be locked separately:

Case 1: Lock the entire OTP area. In the call to devctl(), don't specify the data pointer or size parameter:
```
devctl(fd, DCMD_F3S_LOCKSSR, NULL, 0, NULL);
  
```
Case 2: Lock a specific region. Specify the data pointer and size parameters in the call to devctl(). For example, to lock region 17:
```
lock = 17;
devctl(fd, DCMD_F3S_LOCKSSR, &lock, 1, NULL);
  
```