@@ -45,6 +45,29 @@ static int syscon_pre_probe(struct udevice *dev)
#endif
}
+struct regmap *syscon_regmap_lookup_by_phandle(struct udevice *dev,
+ const char *name)
+{
+ struct udevice *syscon;
+ struct regmap *r;
+ int err;
+
+ err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
+ name, &syscon);
+ if (err) {
+ printf("unable to find syscon device\n");
+ return ERR_PTR(err);
+ }
+
+ r = syscon_get_regmap(syscon);
+ if (!r) {
+ printf("unable to find regmap\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ return r;
+}
+
int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp)
{
struct udevice *dev;
@@ -74,6 +74,19 @@ int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp);
struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data);
/**
+ * syscon_regmap_lookup_by_phandle() - Look up a controller by a phandle
+ *
+ * This operates by looking up the given name in the device (device
+ * tree property) of the device using the system controller.
+ *
+ * @dev: Device using the system controller
+ * @name: Name of property referring to the system controller
+ * @return A pointer to the regmap if found, ERR_PTR(-ve) on error
+ */
+struct regmap *syscon_regmap_lookup_by_phandle(struct udevice *dev,
+ const char *name);
+
+/**
* syscon_get_first_range() - get the first memory range from a syscon regmap
*
* @driver_data: Driver data value to look up
syscon_regmap_lookup_by_phandle() can be used to the regmap of a syscon device from a reference in the DTS. It operates similarly to the linux version of the namesake function. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> --- drivers/core/syscon-uclass.c | 23 +++++++++++++++++++++++ include/syscon.h | 13 +++++++++++++ 2 files changed, 36 insertions(+)