regmap: add support for regmap_init_mmio_clk

regmap-mmio is used in Linux for clocked memory mapped I/O regions.
Port it over, so we can more easily port drivers using it.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 50 insertions, 0 deletions

diff --git a/include/regmap.h b/include/regmap.h
index 718bb51979..3bcd9fe038 100644
--- a/include/regmap.h
+++ b/include/regmap.h
@@ -45,6 +45,56 @@ struct regmap *regmap_init(struct device_d *dev,
 			     const struct regmap_bus *bus,
 			     void *bus_context,
 			     const struct regmap_config *config);
+
+struct clk;
+
+/**
+ * of_regmap_init_mmio_clk() - Initialise register map with register clock
+ *
+ * @np: Device node that will be interacted with
+ * @clk_id: register clock consumer ID
+ * @regs: Pointer to memory-mapped IO region
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *of_regmap_init_mmio_clk(struct device_node *np, const char *clk_id,
+				       void __iomem *regs,
+				       const struct regmap_config *config);
+
+/**
+ * regmap_init_mmio_clk() - Initialise register map with register clock
+ *
+ * @dev: Device that will be interacted with
+ * @clk_id: register clock consumer ID
+ * @regs: Pointer to memory-mapped IO region
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *regmap_init_mmio_clk(struct device_d *dev, const char *clk_id,
+				    void __iomem *regs,
+				    const struct regmap_config *config);
+
+/**
+ * regmap_init_mmio() - Initialise register map
+ *
+ * @dev: Device that will be interacted with
+ * @regs: Pointer to memory-mapped IO region
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+#define regmap_init_mmio(dev, regs, config)		\
+	regmap_init_mmio_clk(dev, NULL, regs, config)
+
+
+int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
+void regmap_mmio_detach_clk(struct regmap *map);
+
 void regmap_exit(struct regmap *map);
 
 struct regmap *dev_get_regmap(struct device_d *dev, const char *name);