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-rw-r--r--commands/clk.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/commands/clk.c b/commands/clk.c
index 4e7ca60..469d9b3 100644
--- a/commands/clk.c
+++ b/commands/clk.c
@@ -3,6 +3,8 @@
#include <getopt.h>
#include <linux/clk.h>
#include <linux/err.h>
+#include <environment.h>
+#include <malloc.h>
static int do_clk_enable(int argc, char *argv[])
{
@@ -77,6 +79,59 @@ BAREBOX_CMD_START(clk_set_rate)
BAREBOX_CMD_HELP(cmd_clk_set_rate_help)
BAREBOX_CMD_END
+static int do_clk_get_rate(int argc, char *argv[])
+{
+ int opt;
+ struct clk *clk;
+ unsigned long rate;
+ const char *variable_name = NULL;
+
+ while ((opt = getopt(argc, argv, "s:")) > 0) {
+ switch (opt) {
+ case 's':
+ variable_name = optarg;
+ break;
+ default:
+ return COMMAND_ERROR_USAGE;
+ }
+ }
+
+ if (optind == argc) {
+ fprintf(stderr, "No clock name given\n");
+ return COMMAND_ERROR_USAGE;
+ }
+
+ clk = clk_lookup(argv[optind]);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ rate = clk_get_rate(clk);
+
+ if (variable_name) {
+ char *t;
+
+ t = asprintf("%lu", rate);
+ setenv(variable_name, t);
+ free(t);
+ } else
+ printf("%lu\n", rate);
+
+ return COMMAND_SUCCESS;
+}
+
+BAREBOX_CMD_HELP_START(clk_get_rate)
+BAREBOX_CMD_HELP_TEXT("Show clock CLK rate")
+BAREBOX_CMD_HELP_OPT("-s VARNAME", "set variable VARNAME instead of showing information")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(clk_get_rate)
+ .cmd = do_clk_get_rate,
+ BAREBOX_CMD_DESC("get a clocks rate")
+ BAREBOX_CMD_OPTS("[-s VARNAME] CLK")
+ BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
+ BAREBOX_CMD_HELP(cmd_clk_get_rate_help)
+BAREBOX_CMD_END
+
static int do_clk_dump(int argc, char *argv[])
{
int opt, verbose = 0;