From 0e01a7c3f4b6a42f768a19f7fc1df92d3e3b5d37 Mon Sep 17 00:00:00 2001
From: Pratyush Yadav
Date: Thu, 24 Sep 2020 10:04:14 +0530
Subject: regmap: Add regmap_init_mem_range()
Right now, the base of a regmap can only be obtained from the device
tree. This makes it impossible for devices which calculate the base at
runtime to use a regmap. An example of such a device is the Cadence
Sierra PHY.
Allow creating a regmap with one range whose start and size can be
specified by the driver based on calculations at runtime.
Signed-off-by: Pratyush Yadav
Reviewed-by: Simon Glass
---
include/regmap.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
(limited to 'include/regmap.h')
diff --git a/include/regmap.h b/include/regmap.h
index e6c59dfbce..7c8ad04759 100644
--- a/include/regmap.h
+++ b/include/regmap.h
@@ -350,6 +350,25 @@ int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
int regmap_init_mem_index(ofnode node, struct regmap **mapp, int index);
+/**
+ * regmap_init_mem_range() - Set up a new memory region for ofnode with the
+ * specified range.
+ *
+ * @node: The ofnode for the map.
+ * @r_start: Start of the range.
+ * @r_size: Size of the range.
+ * @mapp: Returns allocated map.
+ *
+ * Return: 0 in success, -errno otherwise
+ *
+ * This creates a regmap with one range where instead of extracting the range
+ * from 'node', it is created based on the parameters specified. This is
+ * useful when a driver needs to calculate the base of the regmap at runtime,
+ * and can't specify it in device tree.
+ */
+int regmap_init_mem_range(ofnode node, ulong r_start, ulong r_size,
+ struct regmap **mapp);
+
/**
* devm_regmap_init() - Initialise register map (device managed)
*
--
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