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util/pmh7tool: Add option to read specific bit 

Change-Id: I045383eedbcf438270e9c64329a8d910bb941ab8
Signed-off-by: Evgeny Zinoviev <me@ch1p.com>
Reviewed-on: https://review.coreboot.org/28388
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Evgeny Zinoviev 2018-08-29 22:24:11 +03:00 committed by Felix Held
parent ce7bc17149
commit 672f56166d
1 changed files with 27 additions and 9 deletions
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36
util/pmh7tool/pmh7tool.c
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@ -53,16 +53,25 @@ void pmh7_register_clear_bit(uint16_t reg, uint8_t bit)
pmh7_register_write(reg, val & ~(1 << bit));
}
uint8_t pmh7_register_read_bit(int16_t reg, uint8_t bit)
{
uint8_t val;
val = pmh7_register_read(reg);
return (val >> bit) & 1;
}
void print_usage(const char *name)
{
printf("usage: %s\n", name);
printf("\n"
" -h, --help: print this help\n"
" -d, --dump: print registers\n"
" -w, --write <addr> <data>: write to register\n"
" -r, --read <addr>: read from register\n"
" -c, --clear-bit <addr> <bit>\n"
" -s, --set-bit <addr> <bit>\n"
" -h, --help: print this help\n"
" -d, --dump: print registers\n"
" -w, --write <addr> <data>: write to register\n"
" -r, --read <addr>: read from register\n"
" -b, --read-bit <addr> <bit> read bit\n"
" -c, --clear-bit <addr> <bit> clear bit\n"
" -s, --set-bit <addr> <bit> set bit\n"
"\n"
"Attention! Writing to PMH7 registers is very dangerous, as you\n"
" directly manipulate the power rails, enable lines,\n"
@ -71,7 +80,7 @@ void print_usage(const char *name)
"\n");
}
enum action {HELP, DUMP, WRITE, READ, CLEAR, SET};
enum action {HELP, DUMP, WRITE, READ, READBIT, CLEAR, SET};
int main(int argc, char *argv[])
{
@ -84,6 +93,7 @@ int main(int argc, char *argv[])
{"dump", 0, 0, 'd'},
{"write", 1, 0, 'w'},
{"read", 1, 0, 'r'},
{"read-bit", 1, 0, 'b'},
{"clear-bit", 1, 0, 'c'},
{"set-bit", 1, 0, 's'},
{0, 0, 0, 0}
@ -94,7 +104,7 @@ int main(int argc, char *argv[])
exit(0);
}
while ((opt = getopt_long(argc, argv, "hdw:r:c:s:",
while ((opt = getopt_long(argc, argv, "hdw:r:c:s:b:",
long_options, &option_index)) != EOF) {
switch (opt) {
case 'd':
@ -107,6 +117,7 @@ int main(int argc, char *argv[])
break;
case 'w':
case 'b':
case 'c':
case 's':
input_addr = strtoul(optarg, NULL, 16);
@ -125,6 +136,9 @@ int main(int argc, char *argv[])
case 'w':
act = WRITE;
break;
case 'b':
act = READBIT;
break;
case 'c':
act = CLEAR;
break;
@ -153,7 +167,7 @@ int main(int argc, char *argv[])
exit(1);
}
if (act == SET || act == CLEAR) {
if (act == SET || act == CLEAR || act == READBIT) {
if (input_data > 7) {
fprintf(stderr,
"Error: <bit> cannot be greater than 7.\n");
@ -198,6 +212,10 @@ int main(int argc, char *argv[])
pmh7_register_write(input_addr, input_data);
break;
case READBIT:
printf("%d\n", pmh7_register_read_bit(input_addr, input_data));
break;
case CLEAR:
pmh7_register_clear_bit(input_addr, input_data);
break;