[PATCHv4 10/15] clk: ti: add support API for fetching memmap index
From: Tero Kristo <hidden>
Date: 2016-10-18 15:46:03
Also in:
linux-clk, linux-omap
Subsystem:
common clk framework, the rest, ti clock driver · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds, Tero Kristo
Searches for a memmap index for a given node. Checks against all the registered iomaps and sees if the node is registered for this. Signed-off-by: Tero Kristo <redacted> --- drivers/clk/ti/clk.c | 24 ++++++++++++++++++++++++ drivers/clk/ti/clock.h | 1 + 2 files changed, 25 insertions(+)
diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index 7a445f4..8bebda4 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c@@ -39,6 +39,7 @@ struct clk_iomap { struct regmap *regmap; void __iomem *mem; + struct device_node *node; }; static struct clk_iomap *clk_memmaps[CLK_MAX_MEMMAPS];
@@ -199,6 +200,28 @@ void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index) } /** + * ti_clk_get_memmap_index - get memory mapping index for a node + * @node: device node pointer to find memmap index for + * + * Finds a matching memory mapping index for a node. Returns the index + * to the mapping, or negative error value in failure. + */ +int ti_clk_get_memmap_index(struct device_node *node) +{ + int i; + + for (i = 0; i < CLK_MAX_MEMMAPS; i++) { + if (!clk_memmaps[i]) + continue; + + if (clk_memmaps[i]->node == node) + return i; + } + + return -ENOENT; +} + +/** * omap2_clk_provider_init - init master clock provider * @parent: master node * @index: internal index for clk_reg_ops
@@ -234,6 +257,7 @@ int __init omap2_clk_provider_init(struct device_node *parent, int index, io->regmap = syscon; io->mem = mem; + io->node = parent; clk_memmaps[index] = io;
diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h
index 9c85a51..9b8a5f2 100644
--- a/drivers/clk/ti/clock.h
+++ b/drivers/clk/ti/clock.h@@ -203,6 +203,7 @@ struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw, struct clk *ti_clk_register_clk(struct ti_clk *setup); int ti_clk_register_clks(struct ti_clk_alias *clks); +int ti_clk_get_memmap_index(struct device_node *node); void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index); void ti_dt_clocks_register(struct ti_dt_clk *oclks); int ti_clk_retry_init(struct device_node *node, struct clk_hw *hw,
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1.9.1