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dm: core: Add support for writing u32 with ofnode

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Add a new function to write an integer to an ofnode (live tree or
flat tree).

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2022-07-30 15:52:14 -06:00 committed by Tom Rini
parent 39e42be12b
commit 55f7990bfe
3 changed files with 41 additions and 0 deletions
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15
drivers/core/ofnode.c
View File

@ -1126,6 +1126,21 @@ int ofnode_write_string(ofnode node, const char *propname, const char *value)
return ofnode_write_prop(node, propname, value, strlen(value) + 1);
}
int ofnode_write_u32(ofnode node, const char *propname, u32 value)
{
fdt32_t *val;
assert(ofnode_valid(node));
log_debug("%s = %x", propname, value);
val = malloc(sizeof(*val));
if (!val)
return -ENOMEM;
*val = cpu_to_fdt32(value);
return ofnode_write_prop(node, propname, val, sizeof(value));
}
int ofnode_set_enabled(ofnode node, bool value)
{
assert(ofnode_valid(node));

10
include/dm/ofnode.h
View File

@ -1154,6 +1154,16 @@ int ofnode_write_prop(ofnode node, const char *propname, const void *value,
*/
int ofnode_write_string(ofnode node, const char *propname, const char *value);
/**
* ofnode_write_u32() - Set an integer property of an ofnode
*
* @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 32-bit integer property
* Return: 0 if successful, -ve on error
*/
int ofnode_write_u32(ofnode node, const char *propname, u32 value);
/**
* ofnode_set_enabled() - Enable or disable a device tree node given by its
* ofnode

16
test/dm/ofnode.c
View File

@ -585,3 +585,19 @@ static int dm_test_ofnode_livetree_writing(struct unit_test_state *uts)
}
DM_TEST(dm_test_ofnode_livetree_writing,
UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_LIVE_OR_FLAT);
static int dm_test_ofnode_u32(struct unit_test_state *uts)
{
ofnode node;
node = ofnode_path("/lcd");
ut_assert(ofnode_valid(node));
ut_asserteq(1366, ofnode_read_u32_default(node, "xres", 123));
ut_assertok(ofnode_write_u32(node, "xres", 1367));
ut_asserteq(1367, ofnode_read_u32_default(node, "xres", 123));
ut_assertok(ofnode_write_u32(node, "xres", 1366));
return 0;
}
DM_TEST(dm_test_ofnode_u32,
UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_LIVE_OR_FLAT);