[U-Boot] [RFC][PATCH] cmd: clk: Add trivial implementation of clock dump for DM

Marek Vasut marex at denx.de
Wed Aug 8 20:10:44 UTC 2018


Add trivial implementation of the clk dump in case DM is enabled.
This implementation just iterates over all the clock registered
with the CLK uclass and prints their rate.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Chin Liang See <chin.liang.see at intel.com>
Cc: Dinh Nguyen <dinguyen at kernel.org>
Cc: Ley Foon Tan <ley.foon.tan at intel.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Tom Rini <trini at konsulko.com>
---
 cmd/clk.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/cmd/clk.c b/cmd/clk.c
index 73fb25092b..fd4231589c 100644
--- a/cmd/clk.c
+++ b/cmd/clk.c
@@ -5,11 +5,48 @@
 #include <common.h>
 #include <command.h>
 #include <clk.h>
+#if defined(CONFIG_DM) && defined(CONFIG_CLK)
+#include <dm.h>
+#include <dm/device-internal.h>
+#endif
 
 int __weak soc_clk_dump(void)
 {
+#if defined(CONFIG_DM) && defined(CONFIG_CLK)
+	struct udevice *dev;
+	struct uclass *uc;
+	struct clk clk;
+	int ret;
+
+	/* Device addresses start at 1 */
+	ret = uclass_get(UCLASS_CLK, &uc);
+	if (ret)
+		return ret;
+
+	uclass_foreach_dev(dev, uc) {
+		memset(&clk, 0, sizeof(clk));
+		ret = device_probe(dev);
+		if (ret) {
+			printf("%-30.30s : ? Hz\n", dev->name);
+			continue;
+		}
+
+		ret = clk_request(dev, &clk);
+		if (ret) {
+			printf("%-30.30s : ? Hz\n", dev->name);
+			continue;
+		}
+
+		printf("%-30.30s : %lu Hz\n", dev->name, clk_get_rate(&clk));
+
+		clk_free(&clk);
+	}
+
+	return 0;
+#else
 	puts("Not implemented\n");
 	return 1;
+#endif
 }
 
 static int do_clk_dump(cmd_tbl_t *cmdtp, int flag, int argc,
-- 
2.16.2



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