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selftests/powerpc: Add {read,write}_{long,ulong}

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Add helper functions to read and write (unsigned) long values directly
from/to files. One of the kernel interfaces uses hex strings, so we need
to allow passing a base too.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230203003947.38033-5-bgray@linux.ibm.com
This commit is contained in:
Benjamin Gray
2023-02-03 11:39:46 +11:00
committed by Michael Ellerman
parent d1bc05b7bf
commit 5c20de5788
5 changed files with 95 additions and 22 deletions
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4
tools/testing/selftests/powerpc/include/utils.h
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@@ -42,6 +42,10 @@ int parse_ulong(const char *buffer, size_t count, unsigned long *result, int bas
int read_file(const char *path, char *buf, size_t count, size_t *len);
int write_file(const char *path, const char *buf, size_t count);
int read_long(const char *path, long *result, int base);
int write_long(const char *path, long result, int base);
int read_ulong(const char *path, unsigned long *result, int base);
int write_ulong(const char *path, unsigned long result, int base);
int read_debugfs_file(const char *debugfs_file, char *buf, size_t count);
int write_debugfs_file(const char *debugfs_file, const char *buf, size_t count);
int read_debugfs_int(const char *debugfs_file, int *result);