struct regmap *syscon_regmap_lookup_by_phandle(struct udevice *dev,
const char *name)
{
struct udevice *syscon;
struct regmap *r;
u32 phandle;
ofnode node;
int err;
err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
name, &syscon);
if (err) {
/* found node with "syscon" compatible, not bounded to SYSCON */
err = ofnode_read_u32(dev_ofnode(dev), name, &phandle);
if (err)
return ERR_PTR(err);
node = ofnode_get_by_phandle(phandle);
if (!ofnode_valid(node)) {
dev_dbg(dev, "unable to find syscon device\n");
return ERR_PTR(-EINVAL);
}
err = syscon_probe_by_ofnode(node, &syscon);
if (err)
return ERR_PTR(-ENODEV);
}
r = syscon_get_regmap(syscon);
if (!r) {
dev_dbg(dev, "unable to find regmap\n");
return ERR_PTR(-ENODEV);
}
return r;
}
static int i2c_pre_probe(struct udevice *dev)
{
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
struct dm_i2c_bus *i2c = dev_get_uclass_priv(dev);
unsigned int max = 0;
ofnode node;
int ret;
i2c->max_transaction_bytes = 0;
dev_for_each_subnode(node, dev) {
ret = ofnode_read_u32(node,
"u-boot,i2c-transaction-bytes",
&max);
if (!ret && max > i2c->max_transaction_bytes)
i2c->max_transaction_bytes = max;
}
int dev_read_u32(struct udevice *dev, const char *propname, u32 *outp)
{
return ofnode_read_u32(dev_ofnode(dev), propname, outp);
}
