diff options
| author |   Sascha Hauer <s.hauer@pengutronix.de> | 2012-05-03 15:36:14 +0530 |
|---|---|---|
| committer |   Mike Turquette <mturquette@linaro.org> | 2012-05-08 14:13:25 -0700 |
| commit | f0948f59dbc8e725a96ba16da666e8f5cdd43ba8 (patch) | |
| tree | 9343cecfdb735b4b9c327edea65e71801b5c3efe /include/linux/clk-private.h | |
| parent | clk: mux: assign init data (diff) | |
| download | linux-dev-f0948f59dbc8e725a96ba16da666e8f5cdd43ba8.tar.xz linux-dev-f0948f59dbc8e725a96ba16da666e8f5cdd43ba8.zip | |
clk: add a fixed factor clock
Having fixed factors/dividers in hardware is a common pattern, so
add a basic clock type doing this. It basically describes a fixed
factor clock using a nominator and a denominator.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Viresh Kumar <viresh.kumar@st.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
[mturquette@linaro.org: constify parent_names in static init macro]
[mturquette@linaro.org: copy/paste bug from mux in static init macro]
[mturquette@linaro.org: fix error handling in clk_register_fixed_factor]
[mturquette@linaro.org: improve division accuracy; thanks to Saravana]
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'include/linux/clk-private.h')
| -rw-r--r-- | include/linux/clk-private.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/clk-private.h b/include/linux/clk-private.h index b258532162b8..eb3f84bc5325 100644 --- a/include/linux/clk-private.h +++ b/include/linux/clk-private.h @@ -143,6 +143,26 @@ struct clk { DEFINE_CLK(_name, clk_mux_ops, _flags, _parent_names, \ _parents); +#define DEFINE_CLK_FIXED_FACTOR(_name, _parent_name, \ + _parent_ptr, _flags, \ + _mult, _div) \ + static struct clk _name; \ + static const char *_name##_parent_names[] = { \ + _parent_name, \ + }; \ + static struct clk *_name##_parents[] = { \ + _parent_ptr, \ + }; \ + static struct clk_fixed_factor _name##_hw = { \ + .hw = { \ + .clk = &_name, \ + }, \ + .mult = _mult, \ + .div = _div, \ + }; \ + DEFINE_CLK(_name, clk_fixed_factor_ops, _flags, \ + _name##_parent_names, _name##_parents); + /** * __clk_init - initialize the data structures in a struct clk * @dev: device initializing this clk, placeholder for now |