Add power_domain_lookup_name interface to power domain uclass to find a power domain device by its DTB node name, not using its associated client device.
Through this interface, we can operate the power domain devices directly. This is needed for non-DM drivers.
Signed-off-by: Ye Li ye.li@nxp.com Signed-off-by: Peng Fan peng.fan@nxp.com Cc: Simon Glass sjg@chromium.org --- drivers/power/domain/power-domain-uclass.c | 42 ++++++++++++++++++++++++++++++ include/power-domain.h | 15 +++++++++++ 2 files changed, 57 insertions(+)
diff --git a/drivers/power/domain/power-domain-uclass.c b/drivers/power/domain/power-domain-uclass.c index 9e9ec4f419..4e9bcbdfae 100644 --- a/drivers/power/domain/power-domain-uclass.c +++ b/drivers/power/domain/power-domain-uclass.c @@ -7,6 +7,8 @@ #include <dm.h> #include <power-domain.h> #include <power-domain-uclass.h> +#include <dm/uclass-internal.h> +#include <dm/device-internal.h>
static inline struct power_domain_ops *power_domain_dev_ops(struct udevice *dev) { @@ -28,6 +30,46 @@ static int power_domain_of_xlate_default(struct power_domain *power_domain, return 0; }
+int power_domain_lookup_name(const char *name, + struct power_domain *power_domain) +{ + struct udevice *dev; + struct power_domain_ops *ops; + int ret; + + debug("%s(power_domain=%p name=%s)\n", __func__, power_domain, name); + + ret = uclass_find_device_by_name(UCLASS_POWER_DOMAIN, name, &dev); + if (!ret) { + /* Probe the dev */ + device_probe(dev); + ops = power_domain_dev_ops(dev); + + power_domain->dev = dev; + if (ops->of_xlate) + ret = ops->of_xlate(power_domain, NULL); + else + ret = power_domain_of_xlate_default(power_domain, NULL); + if (ret) { + debug("of_xlate() failed: %d\n", ret); + return ret; + } + + ret = ops->request(power_domain); + if (ret) { + debug("ops->request() failed: %d\n", ret); + return ret; + } + + debug("%s ok: %s\n", __func__, dev->name); + + return 0; + } + + printf("%s fail: %s, ret = %d\n", __func__, name, ret); + return -EINVAL; +} + int power_domain_get(struct udevice *dev, struct power_domain *power_domain) { struct ofnode_phandle_args args; diff --git a/include/power-domain.h b/include/power-domain.h index aba8c0f65c..9060b174c0 100644 --- a/include/power-domain.h +++ b/include/power-domain.h @@ -74,6 +74,21 @@ struct power_domain { unsigned long id; };
+/** + * power_domain_lookup_name - Lookup the power domain device by name. + * + * This looks up and requests a provider power domain by using its + * device name. This skip the associated client device, but directly + * get the power domain device. + * + * @name: The power domain device's name. + * @power_domain A pointer to a power domain struct to initialize. + * @return 0 if OK, or a negative error code. + */ + +int power_domain_lookup_name(const char *name, + struct power_domain *power_domain); + /** * power_domain_get - Get/request the power domain for a device. *