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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-11-20 11:28:59 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-02-12 17:32:36 +0000
commit0c452df9f08d4f0b829802cec3501d987390ada2 (patch)
tree215ee608d4ac0af8d32d8b32776f7745d10b7302 /arch/arm/mach-pnx4008
parent5413f7464e976e2c2ddb20686fc2e66ae8795b6e (diff)
downloadlinux-2.6.34-ux500-0c452df9f08d4f0b829802cec3501d987390ada2.tar.gz
ARM: PNX4008: provide clock enable/disable methods and initialization
Acked-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pnx4008')
-rw-r--r--arch/arm/mach-pnx4008/clock.c35
-rw-r--r--arch/arm/mach-pnx4008/clock.h4
2 files changed, 26 insertions, 13 deletions
diff --git a/arch/arm/mach-pnx4008/clock.c b/arch/arm/mach-pnx4008/clock.c
index f0cc9190909..3ad694e1596 100644
--- a/arch/arm/mach-pnx4008/clock.c
+++ b/arch/arm/mach-pnx4008/clock.c
@@ -57,18 +57,19 @@ static void propagate_rate(struct clk *clk)
}
}
-static inline void clk_reg_disable(struct clk *clk)
+static void clk_reg_disable(struct clk *clk)
{
if (clk->enable_reg)
__raw_writel(__raw_readl(clk->enable_reg) &
~(1 << clk->enable_shift), clk->enable_reg);
}
-static inline void clk_reg_enable(struct clk *clk)
+static int clk_reg_enable(struct clk *clk)
{
if (clk->enable_reg)
__raw_writel(__raw_readl(clk->enable_reg) |
(1 << clk->enable_shift), clk->enable_reg);
+ return 0;
}
static inline void clk_reg_disable1(struct clk *clk)
@@ -814,7 +815,9 @@ static void local_clk_disable(struct clk *clk)
return;
if (!(--clk->usecount)) {
- if (!(clk->flags & FIXED_RATE) && clk->rate && clk->set_rate)
+ if (clk->disable)
+ clk->disable(clk);
+ else if (!(clk->flags & FIXED_RATE) && clk->rate && clk->set_rate)
clk->set_rate(clk, 0);
if (clk->parent)
local_clk_disable(clk->parent);
@@ -832,8 +835,10 @@ static int local_clk_enable(struct clk *clk)
goto out;
}
- if (!(clk->flags & FIXED_RATE) && !clk->rate && clk->set_rate
- && clk->user_rate)
+ if (clk->enable)
+ ret = clk->enable(clk);
+ else if (!(clk->flags & FIXED_RATE) && !clk->rate && clk->set_rate
+ && clk->user_rate)
ret = clk->set_rate(clk, clk->user_rate);
if (ret != 0 && clk->parent) {
@@ -960,15 +965,21 @@ static int __init clk_init(void)
for (clkp = onchip_clks; clkp < onchip_clks + ARRAY_SIZE(onchip_clks);
clkp++) {
- if (((*clkp)->flags & NEEDS_INITIALIZATION)
- && ((*clkp)->set_rate)) {
- (*clkp)->user_rate = (*clkp)->rate;
- local_set_rate((*clkp), (*clkp)->user_rate);
- if ((*clkp)->set_parent)
- (*clkp)->set_parent((*clkp), (*clkp)->parent);
+ struct clk *clk = *clkp;
+ if (clk->flags & NEEDS_INITIALIZATION) {
+ if (clk->set_rate) {
+ clk->user_rate = clk->rate;
+ local_set_rate(clk, clk->user_rate);
+ if (clk->set_parent)
+ clk->set_parent(clk, clk->parent);
+ }
+ if (clk->enable && clk->usecount)
+ clk->enable(clk);
+ if (clk->disable && !clk->usecount)
+ clk->disable(clk);
}
pr_debug("%s: clock %s, rate %ld\n",
- __func__, (*clkp)->name, (*clkp)->rate);
+ __func__, clk->name, clk->rate);
}
local_clk_enable(&ck_pll4);
diff --git a/arch/arm/mach-pnx4008/clock.h b/arch/arm/mach-pnx4008/clock.h
index 933e18133b9..39720d6c0d0 100644
--- a/arch/arm/mach-pnx4008/clock.h
+++ b/arch/arm/mach-pnx4008/clock.h
@@ -27,9 +27,11 @@ struct clk {
u8 enable_shift1;
u32 enable_reg1;
u32 parent_switch_reg;
- u32(*round_rate) (struct clk *, u32);
+ u32(*round_rate) (struct clk *, u32);
int (*set_rate) (struct clk *, u32);
int (*set_parent) (struct clk * clk, struct clk * parent);
+ int (*enable)(struct clk *);
+ void (*disable)(struct clk *);
};
/* Flags */