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authorEvgeny Zinoviev <me@ch1p.com>2018-08-29 22:24:11 +0300
committerFelix Held <felix-coreboot@felixheld.de>2018-08-31 19:54:43 +0000
commit672f56166db97bf4ad2391db02303b88b413c791 (patch)
treeb2fb0f45972b3ebc6f4525b4cd03c2c25692b508 /util/pmh7tool/pmh7tool.c
parentce7bc17149b3220cd4b2589a77cc92ff3719dc63 (diff)
downloadcoreboot-672f56166db97bf4ad2391db02303b88b413c791.tar.xz
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>
Diffstat (limited to 'util/pmh7tool/pmh7tool.c')
-rw-r--r--util/pmh7tool/pmh7tool.c36
1 files changed, 27 insertions, 9 deletions
diff --git a/util/pmh7tool/pmh7tool.c b/util/pmh7tool/pmh7tool.c
index d0c652eb2a..f03d97e254 100644
--- a/util/pmh7tool/pmh7tool.c
+++ b/util/pmh7tool/pmh7tool.c
@@ -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;