Add functions to write a boolean property. This involves deleting it if the value is false.
Add a new ofnode_has_property() as well. Add a comment about the behaviour of of_read_property() when the property value is empty.
Signed-off-by: Simon Glass sjg@chromium.org ---
(no changes since v1)
drivers/core/ofnode.c | 36 ++++++++++++++++++++++++++++++++++-- include/dm/ofnode.h | 32 +++++++++++++++++++++++++++++++- test/dm/ofnode.c | 25 +++++++++++++++++++++++++ 3 files changed, 90 insertions(+), 3 deletions(-)
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index 39ba480c8f88..4dcb3dd1c037 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -491,12 +491,12 @@ u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
bool ofnode_read_bool(ofnode node, const char *propname) { - const void *prop; + bool prop;
assert(ofnode_valid(node)); debug("%s: %s: ", __func__, propname);
- prop = ofnode_get_property(node, propname, NULL); + prop = ofnode_has_property(node, propname);
debug("%s\n", prop ? "true" : "false");
@@ -1168,6 +1168,14 @@ const void *ofnode_get_property(ofnode node, const char *propname, int *lenp) propname, lenp); }
+bool ofnode_has_property(ofnode node, const char *propname) +{ + if (ofnode_is_np(node)) + return of_find_property(ofnode_to_np(node), propname, NULL); + else + return ofnode_get_property(node, propname, NULL); +} + int ofnode_first_property(ofnode node, struct ofprop *prop) { prop->node = node; @@ -1616,6 +1624,30 @@ int ofnode_write_u32(ofnode node, const char *propname, u32 value) return ofnode_write_prop(node, propname, val, sizeof(value), false); }
+int ofnode_write_bool(ofnode node, const char *propname, bool value) +{ + if (value) + return ofnode_write_prop(node, propname, NULL, 0, false); + else + return ofnode_delete_prop(node, propname); +} + +int ofnode_delete_prop(ofnode node, const char *propname) +{ + if (ofnode_is_np(node)) { + struct property *prop; + int len; + + prop = of_find_property(ofnode_to_np(node), propname, &len); + if (prop) + return of_remove_property(ofnode_to_np(node), prop); + return 0; + } else { + return fdt_delprop(ofnode_to_fdt(node), ofnode_to_offset(node), + propname); + } +} + int ofnode_set_enabled(ofnode node, bool value) { assert(ofnode_valid(node)); diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index a8605fb718b2..ebea29d32afc 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -1037,10 +1037,19 @@ int ofnode_decode_panel_timing(ofnode node, * @node: node to read * @propname: property to read * @lenp: place to put length on success - * Return: pointer to property, or NULL if not found + * Return: pointer to property value, or NULL if not found or empty */ const void *ofnode_get_property(ofnode node, const char *propname, int *lenp);
+/** + * ofnode_has_property() - check if a node has a named property + * + * @node: node to read + * @propname: property to read + * Return: true if the property exists in the node, false if not + */ +bool ofnode_has_property(ofnode node, const char *propname); + /** * ofnode_first_property()- get the reference of the first property * @@ -1452,6 +1461,27 @@ int ofnode_write_string(ofnode node, const char *propname, const char *value); */ int ofnode_write_u32(ofnode node, const char *propname, u32 value);
+/** + * ofnode_write_bool() - Set a boolean property of an ofnode + * + * This either adds or deleted a property with a zero-length value + * + * @node: The node for whose string property should be set + * @propname: The name of the string property to set + * @value: The new value of the boolean property + * Return: 0 if successful, -ve on error + */ +int ofnode_write_bool(ofnode node, const char *propname, bool value); + +/** + * ofnode_delete_prop() - Delete a property + * + * @node: Node containing the property to delete + * @propname: Name of property to delete + * Return: 0 if successful, -ve on error + */ +int ofnode_delete_prop(ofnode node, const char *propname); + /** * ofnode_set_enabled() - Enable or disable a device tree node given by its * ofnode diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c index ceeb8e57791e..9477f791d649 100644 --- a/test/dm/ofnode.c +++ b/test/dm/ofnode.c @@ -1480,3 +1480,28 @@ static int dm_test_oftree_to_fdt(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_oftree_to_fdt, UT_TESTF_SCAN_FDT); + +/* test ofnode_read_bool() and ofnode_write_bool() */ +static int dm_test_bool(struct unit_test_state *uts) +{ + const char *propname = "missing-bool-value"; + ofnode node; + + node = ofnode_path("/a-test"); + ut_assert(ofnode_read_bool(node, "bool-value")); + ut_assert(!ofnode_read_bool(node, propname)); + ut_assert(!ofnode_has_property(node, propname)); + + ut_assertok(ofnode_write_bool(node, propname, true)); + ut_assert(ofnode_read_bool(node, propname)); + ut_assert(ofnode_has_property(node, propname)); + ut_assert(ofnode_read_bool(node, "bool-value")); + + ut_assertok(ofnode_write_bool(node, propname, false)); + ut_assert(!ofnode_read_bool(node, propname)); + ut_assert(!ofnode_has_property(node, propname)); + ut_assert(ofnode_read_bool(node, "bool-value")); + + return 0; +} +DM_TEST(dm_test_bool, UT_TESTF_SCAN_FDT);