diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-11-04 16:35:03 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-02-08 11:38:39 +0000 |
| commit | 897dcded6fb6565f4d1c22a55d21f135403db132 (patch) | |
| tree | da9c4028ed49a1482445131760b4fc45c6524abe /arch/arm/plat-omap | |
| parent | 548d849574847b788fe846fe21a41386063be161 (diff) | |
[ARM] omap: provide a NULL clock operations structure
... and use it for clocks which are ALWAYS_ENABLED. These clocks
use a non-NULL enable_reg pointer for other purposes (such as
selecting clock rates.)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/clock.c | 23 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/mach/clock.h | 4 |
2 files changed, 24 insertions, 3 deletions
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c index be6aab9c683..529c4a9f012 100644 --- a/arch/arm/plat-omap/clock.c +++ b/arch/arm/plat-omap/clock.c @@ -358,6 +358,23 @@ void clk_enable_init_clocks(void) } EXPORT_SYMBOL(clk_enable_init_clocks); +/* + * Low level helpers + */ +static int clkll_enable_null(struct clk *clk) +{ + return 0; +} + +static void clkll_disable_null(struct clk *clk) +{ +} + +const struct clkops clkops_null = { + .enable = clkll_enable_null, + .disable = clkll_disable_null, +}; + #ifdef CONFIG_CPU_FREQ void clk_init_cpufreq_table(struct cpufreq_frequency_table **table) { @@ -383,8 +400,10 @@ static int __init clk_disable_unused(void) unsigned long flags; list_for_each_entry(ck, &clocks, node) { - if (ck->usecount > 0 || (ck->flags & ALWAYS_ENABLED) || - ck->enable_reg == 0) + if (ck->ops == &clkops_null) + continue; + + if (ck->usecount > 0 || ck->enable_reg == 0) continue; spin_lock_irqsave(&clockfw_lock, flags); diff --git a/arch/arm/plat-omap/include/mach/clock.h b/arch/arm/plat-omap/include/mach/clock.h index 4fe5084e8cc..c1e484463ed 100644 --- a/arch/arm/plat-omap/include/mach/clock.h +++ b/arch/arm/plat-omap/include/mach/clock.h @@ -125,11 +125,13 @@ extern void clk_deny_idle(struct clk *clk); extern int clk_get_usecount(struct clk *clk); extern void clk_enable_init_clocks(void); +extern const struct clkops clkops_null; + /* Clock flags */ #define RATE_CKCTL (1 << 0) /* Main fixed ratio clocks */ #define RATE_FIXED (1 << 1) /* Fixed clock rate */ #define RATE_PROPAGATES (1 << 2) /* Program children too */ -#define ALWAYS_ENABLED (1 << 4) /* Clock cannot be disabled */ +/* bits 3-4 are free */ #define ENABLE_REG_32BIT (1 << 5) /* Use 32-bit access */ #define VIRTUAL_IO_ADDRESS (1 << 6) /* Clock in virtual address */ #define CLOCK_IDLE_CONTROL (1 << 7) |