Make pinconf_generic_dt_node_to_map() also scan the dt pin configuration node
directly referenced by phandle, not only its child nodes.
The "parent scan" feature needs a few other changes:
* Move the pinconf_generic_dt_node_to_map() error handling code to a common
place, under the 'exit' label.
* Move the pins/groups strings count earlier in
pinconf_generic_dt_subnode_to_map(), to allow us to bail out early when
these properties are missing or wrong
Signed-off-by: Baruch Siach <[email protected]>
---
drivers/pinctrl/pinconf-generic.c | 48 +++++++++++++++++++++++----------------
1 file changed, 28 insertions(+), 20 deletions(-)
diff --git a/drivers/pinctrl/pinconf-generic.c
b/drivers/pinctrl/pinconf-generic.c
index 4db92f64b4de..b5fbfb3584d9 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -283,11 +283,26 @@ int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev
*pctldev,
struct device *dev = pctldev->dev;
unsigned long *configs = NULL;
unsigned num_configs = 0;
- unsigned reserve;
+ unsigned reserve, strings_count;
struct property *prop;
const char *group;
const char *subnode_target_type = "pins";
+ ret = of_property_count_strings(np, "pins");
+ if (ret < 0) {
+ ret = of_property_count_strings(np, "groups");
+ if (ret < 0)
+ /* skip this node; may contain config child nodes */
+ return 0;
+ if (type == PIN_MAP_TYPE_INVALID)
+ type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ subnode_target_type = "groups";
+ } else {
+ if (type == PIN_MAP_TYPE_INVALID)
+ type = PIN_MAP_TYPE_CONFIGS_PIN;
+ }
+ strings_count = ret;
+
ret = of_property_read_string(np, "function", &function);
if (ret < 0) {
/* EINVAL=missing, which is fine since it's optional */
@@ -309,21 +324,7 @@ int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev
*pctldev,
if (num_configs)
reserve++;
- ret = of_property_count_strings(np, "pins");
- if (ret < 0) {
- ret = of_property_count_strings(np, "groups");
- if (ret < 0) {
- dev_err(dev, "could not parse property pins/groups\n");
- goto exit;
- }
- if (type == PIN_MAP_TYPE_INVALID)
- type = PIN_MAP_TYPE_CONFIGS_GROUP;
- subnode_target_type = "groups";
- } else {
- if (type == PIN_MAP_TYPE_INVALID)
- type = PIN_MAP_TYPE_CONFIGS_PIN;
- }
- reserve *= ret;
+ reserve *= strings_count;
ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
num_maps, reserve);
@@ -367,15 +368,22 @@ int pinconf_generic_dt_node_to_map(struct pinctrl_dev
*pctldev,
*map = NULL;
*num_maps = 0;
+ ret = pinconf_generic_dt_subnode_to_map(pctldev, np_config, map,
+ &reserved_maps, num_maps, type);
+ if (ret < 0)
+ goto exit;
+
for_each_child_of_node(np_config, np) {
ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
&reserved_maps, num_maps, type);
- if (ret < 0) {
- pinctrl_utils_dt_free_map(pctldev, *map, *num_maps);
- return ret;
- }
+ if (ret < 0)
+ goto exit;
}
return 0;
+
+exit:
+ pinctrl_utils_dt_free_map(pctldev, *map, *num_maps);
+ return ret;
}
EXPORT_SYMBOL_GPL(pinconf_generic_dt_node_to_map);
--
2.1.4
--
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