diff options
| author | James Hogan <james.hogan@imgtec.com> | 2013-01-15 15:27:45 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2013-06-13 12:54:41 +0100 |
| commit | caa279dda4d9a442d824cd333e8b72078b83e855 (patch) | |
| tree | 609d39ecdf728bc759ab4a3e8775475b1e4636b7 /arch/metag/include | |
| parent | c24d2976c7834aa948f9d8a48ad4285cfbaf1c3a (diff) | |
metag: init common clk and use "core" clk
If the common clock framework is enabled, call of_clk_init(NULL) in
time_init() to register device tree clocks with the clock framework.
After this time_init() calls a new function init_metag_clocks(), which
looks for a clock named "core" in the node compatible with "img,meta"
(usually the root node). If found the get_core_freq machine callback is
overridden to obtain the core clock frequency using that clock.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: devicetree-discuss@lists.ozlabs.org
Diffstat (limited to 'arch/metag/include')
| -rw-r--r-- | arch/metag/include/asm/clock.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/metag/include/asm/clock.h b/arch/metag/include/asm/clock.h index 3e2915a280c7..ded4ab2e1fd0 100644 --- a/arch/metag/include/asm/clock.h +++ b/arch/metag/include/asm/clock.h @@ -19,6 +19,8 @@ * core frequency will be determined like this: * Meta 1: based on loops_per_jiffy. * Meta 2: (EXPAND_TIMER_DIV + 1) MHz. + * If a "core" clock is provided by the device tree, it + * will override this function. */ struct meta_clock_desc { unsigned long (*get_core_freq)(void); @@ -27,6 +29,12 @@ struct meta_clock_desc { extern struct meta_clock_desc _meta_clock; /* + * Perform platform clock initialisation, reading clocks from device tree etc. + * Only accessible during boot. + */ +void init_metag_clocks(void); + +/* * Set up the default clock, ensuring all callbacks are valid - only accessible * during boot. */ |