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authorSascha Hauer <s.hauer@pengutronix.de>2012-09-24 00:38:25 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2012-10-04 15:19:55 +0200
commitc797f3c168e2c3fd8bc9532680b7c587652ac8c1 (patch)
tree4a531e6dc975f9c0f6a0a1e2247ebabbea110989 /commands/clk.c
parentf2e2e596a221c146082821aa4d9ae249fe9d561a (diff)
downloadbarebox-c797f3c168e2c3fd8bc9532680b7c587652ac8c1.tar.gz
commands: Add clk commands
This adds some basic commands to manupulate clocks on the command line. Right now we have: - clk_set_parent - clk_set_rate - clk_enable - clk_disable - clk_dump The commands work based on the clock name, otherwise they behave like the Linux Kernel C functions. clk_dump will dump the clocktree to the console. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands/clk.c')
-rw-r--r--commands/clk.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/commands/clk.c b/commands/clk.c
new file mode 100644
index 0000000..241dc79
--- /dev/null
+++ b/commands/clk.c
@@ -0,0 +1,144 @@
+#include <common.h>
+#include <command.h>
+#include <getopt.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+static int do_clk_enable(int argc, char *argv[])
+{
+ struct clk *clk;
+
+ if (argc != 2)
+ return COMMAND_ERROR_USAGE;
+
+ clk = clk_lookup(argv[1]);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ return clk_enable(clk);
+}
+
+BAREBOX_CMD_HELP_START(clk_enable)
+BAREBOX_CMD_HELP_USAGE("clk_enable <clk>\n")
+BAREBOX_CMD_HELP_SHORT("enable <clk>\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(clk_enable)
+ .cmd = do_clk_enable,
+ .usage = "enable a clock",
+ BAREBOX_CMD_HELP(cmd_clk_enable_help)
+BAREBOX_CMD_END
+
+static int do_clk_disable(int argc, char *argv[])
+{
+ struct clk *clk;
+
+ if (argc != 2)
+ return COMMAND_ERROR_USAGE;
+
+ clk = clk_lookup(argv[1]);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ clk_disable(clk);
+
+ return 0;
+}
+
+BAREBOX_CMD_HELP_START(clk_disable)
+BAREBOX_CMD_HELP_USAGE("clk_disable <clk>\n")
+BAREBOX_CMD_HELP_SHORT("disable <clk>\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(clk_disable)
+ .cmd = do_clk_disable,
+ .usage = "disable a clock",
+ BAREBOX_CMD_HELP(cmd_clk_disable_help)
+BAREBOX_CMD_END
+
+static int do_clk_set_rate(int argc, char *argv[])
+{
+ struct clk *clk;
+ unsigned long rate;
+
+ if (argc != 3)
+ return COMMAND_ERROR_USAGE;
+
+ clk = clk_lookup(argv[1]);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ rate = simple_strtoul(argv[2], NULL, 0);
+
+ return clk_set_rate(clk, rate);
+}
+
+BAREBOX_CMD_HELP_START(clk_set_rate)
+BAREBOX_CMD_HELP_USAGE("clk_set_rate <clk> <rate_hz>\n")
+BAREBOX_CMD_HELP_SHORT("Set clock <clk> to <rate>\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(clk_set_rate)
+ .cmd = do_clk_set_rate,
+ .usage = "set a clocks rate",
+ BAREBOX_CMD_HELP(cmd_clk_set_rate_help)
+BAREBOX_CMD_END
+
+static int do_clk_dump(int argc, char *argv[])
+{
+ int opt, verbose = 0;
+
+ while ((opt = getopt(argc, argv, "v")) > 0) {
+ switch(opt) {
+ case 'v':
+ verbose = 1;
+ break;
+ default:
+ return -EINVAL;
+
+ }
+ }
+
+ clk_dump(verbose);
+
+ return 0;
+}
+
+BAREBOX_CMD_HELP_START(clk_dump)
+BAREBOX_CMD_HELP_USAGE("clk_dump [-v]\n")
+BAREBOX_CMD_HELP_OPT ("-v", "verbose\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(clk_dump)
+ .cmd = do_clk_dump,
+ .usage = "show information about registered clocks",
+ BAREBOX_CMD_HELP(cmd_clk_dump_help)
+BAREBOX_CMD_END
+
+static int do_clk_set_parent(int argc, char *argv[])
+{
+ struct clk *clk, *parent;
+
+ if (argc != 3)
+ return COMMAND_ERROR_USAGE;
+
+ clk = clk_lookup(argv[1]);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ parent = clk_lookup(argv[2]);
+ if (IS_ERR(parent))
+ return PTR_ERR(parent);
+
+ return clk_set_parent(clk, parent);
+}
+
+BAREBOX_CMD_HELP_START(clk_set_parent)
+BAREBOX_CMD_HELP_USAGE("clk_set_parent <clk> <parent>\n")
+BAREBOX_CMD_HELP_SHORT("Set parent of <clk> to <parent>\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(clk_set_parent)
+ .cmd = do_clk_set_parent,
+ .usage = "set a parent of a clock",
+ BAREBOX_CMD_HELP(cmd_clk_set_parent_help)
+BAREBOX_CMD_END