[PATCH 1/3] param: Add info function

[Sascha Hauer]

Some parameters may wish to provide some information about their
meaning or possible values. Provide an info callback for parameters.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/base/driver.c | 8 ++++++--
 include/param.h       | 1 +
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index edd49b3..30a4bc5 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -495,8 +495,12 @@ static int do_devinfo(int argc, char *argv[])
 		printf("%s\n", list_empty(&dev->parameters) ?
 				"no parameters available" : "Parameters:");
 
-		list_for_each_entry(param, &dev->parameters, list)
-			printf("%16s = %s\n", param->name, dev_get_param(dev, param->name));
+		list_for_each_entry(param, &dev->parameters, list) {
+			printf("%16s = %s", param->name, dev_get_param(dev, param->name));
+			if (param->info)
+				param->info(param);
+			printf("\n");
+		}
 #ifdef CONFIG_OFDEVICE
 		if (dev->device_node) {
 			printf("\ndevice node: %s\n", dev->device_node->full_name);
diff --git a/include/param.h b/include/param.h
index 4af2d09..54dea56 100644
--- a/include/param.h
+++ b/include/param.h
@@ -12,6 +12,7 @@ typedef unsigned long          IPaddr_t;
 struct param_d {
 	const char* (*get)(struct device_d *, struct param_d *param);
 	int (*set)(struct device_d *, struct param_d *param, const char *val);
+	void (*info)(struct param_d *param);
 	unsigned int flags;
 	char *name;
 	char *value;
-- 
1.8.2.rc2