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@xxxxxxxxxxxxxx>
---
commands/Kconfig | 8 ++++
commands/Makefile | 1 +
commands/clk.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 142 insertions(+)
create mode 100644 commands/clk.c
diff --git a/commands/Kconfig b/commands/Kconfig
index 930a9b1..7969937 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -605,6 +605,14 @@ config CMD_USB
help
The usb command allows to rescan for USB devices.
+config CMD_CLK
+ tristate
+ depends on COMMON_CLK
+ prompt "clock manipulation commands"
+ help
+ Say yes here to get clk_set_rate, clk_set_parent and clk_dump
+ commands to manipulate clocks on your system.
+
menuconfig CMD_WD
bool
depends on WATCHDOG
diff --git a/commands/Makefile b/commands/Makefile
index 24bf46a..7a36f60 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -74,3 +74,4 @@ obj-$(CONFIG_CMD_BASENAME) += basename.o
obj-$(CONFIG_CMD_DIRNAME) += dirname.o
obj-$(CONFIG_CMD_READLINK) += readlink.o
obj-$(CONFIG_CMD_LN) += ln.o
+obj-$(CONFIG_CMD_CLK) += clk.o
diff --git a/commands/clk.c b/commands/clk.c
new file mode 100644
index 0000000..5cde3ca
--- /dev/null
+++ b/commands/clk.c
@@ -0,0 +1,133 @@
+#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]);
+
+ 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]);
+
+ 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]);
+ 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]);
+ parent = clk_lookup(argv[2]);
+
+ 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
--
1.7.10.4
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