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syscon: dm: Add a new method to get a regmap from DTS

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syscon_regmap_lookup_by_phandle() can be used to get 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>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jean-Jacques Hiblot
2018-11-29 10:57:37 +01:00
committed by Marek Vasut
parent 4d3825c191
commit 6c3af1f24e
4 changed files with 69 additions and 2 deletions
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13
include/syscon.h
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@@ -73,6 +73,19 @@ 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
*