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| author | Paul Walmsley <paul@pwsan.com> | 2010-05-18 18:40:24 -0600 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2010-05-20 12:31:06 -0600 |
| commit | d74b4949714741f4c58cd1801a6a92737b89a61c (patch) | |
| tree | a0e838fff3cab45bfba0c319fcdf7f1ea594686f /arch/arm/plat-omap | |
| parent | 275f675c24a16ea45cc78bc03ff73fd06be8bffb (diff) | |
| download | talos-obmc-linux-d74b4949714741f4c58cd1801a6a92737b89a61c.tar.gz talos-obmc-linux-d74b4949714741f4c58cd1801a6a92737b89a61c.zip | |
OMAP2+ clock: remove DEFAULT_RATE clksel_rate flag
The DEFAULT_RATE clksel_rate flag is essentially useless. It was set
on some of the lowest divisors, which, when switching to a much
higher-rate parent, could have potentially resulted in rates that
exceeded the hardware specifications for downstream clocks in the
window between the clk_set_parent(), and a subsequent clk_set_rate().
It seems much safer to just remove the flag and always use the highest
available divisor (resulting in the lowest possible rate) after the
switch, and this patch does so.
Ideally, it would be best to first attempt to switch to a divisor that
matches the clock's rate with the previous parent, if at all possible.
But that is a project for some other day or some other person. The
parent changing code is rarely used.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/clock.h | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h index 34f7fa9ad4c0..9c551d676c63 100644 --- a/arch/arm/plat-omap/include/plat/clock.h +++ b/arch/arm/plat-omap/include/plat/clock.h @@ -196,13 +196,12 @@ extern struct clk dummy_ck; #define INVERT_ENABLE (1 << 4) /* 0 enables, 1 disables */ /* Clksel_rate flags */ -#define DEFAULT_RATE (1 << 0) -#define RATE_IN_242X (1 << 1) -#define RATE_IN_243X (1 << 2) -#define RATE_IN_343X (1 << 3) /* rates common to all 343X */ -#define RATE_IN_3430ES2 (1 << 4) /* 3430ES2 rates only */ -#define RATE_IN_36XX (1 << 5) -#define RATE_IN_4430 (1 << 6) +#define RATE_IN_242X (1 << 0) +#define RATE_IN_243X (1 << 1) +#define RATE_IN_343X (1 << 2) /* rates common to all 343X */ +#define RATE_IN_3430ES2 (1 << 3) /* 3430ES2 rates only */ +#define RATE_IN_36XX (1 << 4) +#define RATE_IN_4430 (1 << 5) #define RATE_IN_24XX (RATE_IN_242X | RATE_IN_243X) |
