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clk: allow to instanciate clk gate without registering it 

Allows to reuse the clk gate code within other clocks.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Lucas Stach 2013-06-30 23:08:45 +02:00 committed by Sascha Hauer
parent c780cd044e
commit 98a2fe8f95
2 changed files with 29 additions and 6 deletions
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31
drivers/clk/clk-gate.c
View File

@ -29,6 +29,8 @@ struct clk_gate {
unsigned flags;
};
#define to_clk_gate(_clk) container_of(_clk, struct clk_gate, clk)
static int clk_gate_enable(struct clk *clk)
{
struct clk_gate *g = container_of(clk, struct clk_gate, clk);
@ -80,11 +82,10 @@ struct clk_ops clk_gate_ops = {
.is_enabled = clk_gate_is_enabled,
};
struct clk *clk_gate(const char *name, const char *parent, void __iomem *reg,
u8 shift)
struct clk *clk_gate_alloc(const char *name, const char *parent,
void __iomem *reg, u8 shift)
{
struct clk_gate *g = xzalloc(sizeof(*g));
int ret;
g->parent = parent;
g->reg = reg;
@ -94,13 +95,31 @@ struct clk *clk_gate(const char *name, const char *parent, void __iomem *reg,
g->clk.parent_names = &g->parent;
g->clk.num_parents = 1;
ret = clk_register(&g->clk);
return &g->clk;
}
void clk_gate_free(struct clk *clk_gate)
{
struct clk_gate *g = to_clk_gate(clk_gate);
free(g);
}
struct clk *clk_gate(const char *name, const char *parent, void __iomem *reg,
u8 shift)
{
struct clk *g;
int ret;
g = clk_gate_alloc(name , parent, reg, shift);
ret = clk_register(g);
if (ret) {
free(g);
free(to_clk_gate(g));
return ERR_PTR(ret);
}
return &g->clk;
return g;
}
struct clk *clk_gate_inverted(const char *name, const char *parent,

4
include/linux/clk.h
View File

@ -214,6 +214,10 @@ struct clk *clk_fixed_factor(const char *name,
const char *parent, unsigned int mult, unsigned int div);
struct clk *clk_mux(const char *name, void __iomem *reg,
u8 shift, u8 width, const char **parents, u8 num_parents);
struct clk *clk_gate_alloc(const char *name, const char *parent,
void __iomem *reg, u8 shift);
void clk_gate_free(struct clk *clk_gate);
struct clk *clk_gate(const char *name, const char *parent, void __iomem *reg,
u8 shift);
struct clk *clk_gate_inverted(const char *name, const char *parent, void __iomem *reg,