diff options
| author | Stephen Boyd <sboyd@codeaurora.org> | 2016-05-16 11:05:16 +0530 |
|---|---|---|
| committer | Taniya Das <tdas@codeaurora.org> | 2016-11-03 09:16:56 +0530 |
| commit | 2ac3d304b9acb8f1009cba6567f33fa285a5f6dc (patch) | |
| tree | b3f8dd6f0ebcaeca49c2587a0dedc31f8f274606 /include/linux/clk-provider.h | |
| parent | 8992f7dd08968333dcbeb70c5a0862970a0094cf (diff) | |
clk: Add support to vote to regulator framework from clk framework
Add vdd_class support which would help vote/unvote for any voltage rail
for the clock frequency to the regulator framework. A clock client request
for a clock frequency would look for the corresponding voltage vote and
would be send the request to regulator framework.
Change-Id: I5b1229091fcb7b3887b54735b9663fd31a35db21
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Diffstat (limited to 'include/linux/clk-provider.h')
| -rw-r--r-- | include/linux/clk-provider.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 9a4a80ae5eaf..2a5acbdc6327 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -13,6 +13,7 @@ #include <linux/io.h> #include <linux/of.h> +#include <linux/mutex.h> #ifdef CONFIG_COMMON_CLK @@ -227,6 +228,9 @@ struct clk_ops { * @parent_names: array of string names for all possible parents * @num_parents: number of possible parents * @flags: framework-level hints and quirks + * @vdd_class: voltage scaling requirement class + * @rate_max: maximum clock rate in Hz supported at each voltage level + * @num_rate_max: number of maximum voltage level supported */ struct clk_init_data { const char *name; @@ -234,8 +238,69 @@ struct clk_init_data { const char * const *parent_names; u8 num_parents; unsigned long flags; + struct clk_vdd_class *vdd_class; + unsigned long *rate_max; + int num_rate_max; }; +struct regulator; + +/** + * struct clk_vdd_class - Voltage scaling class + * @class_name: name of the class + * @regulator: array of regulators + * @num_regulators: size of regulator array. Standard regulator APIs will be + used if this field > 0 + * @set_vdd: function to call when applying a new voltage setting + * @vdd_uv: sorted 2D array of legal voltage settings. Indexed by level, then + regulator + * @level_votes: array of votes for each level + * @num_levels: specifies the size of level_votes array + * @cur_level: the currently set voltage level + * @lock: lock to protect this struct + */ +struct clk_vdd_class { + const char *class_name; + struct regulator **regulator; + int num_regulators; + int (*set_vdd)(struct clk_vdd_class *v_class, int level); + int *vdd_uv; + int *level_votes; + int num_levels; + unsigned long cur_level; + struct mutex lock; +}; + +#define DEFINE_VDD_CLASS(_name, _set_vdd, _num_levels) \ + struct clk_vdd_class _name = { \ + .class_name = #_name, \ + .set_vdd = _set_vdd, \ + .level_votes = (int [_num_levels]) {}, \ + .num_levels = _num_levels, \ + .cur_level = _num_levels, \ + .lock = __MUTEX_INITIALIZER(_name.lock) \ + } + +#define DEFINE_VDD_REGULATORS(_name, _num_levels, _num_regulators, _vdd_uv) \ + struct clk_vdd_class _name = { \ + .class_name = #_name, \ + .vdd_uv = _vdd_uv, \ + .regulator = (struct regulator * [_num_regulators]) {}, \ + .num_regulators = _num_regulators, \ + .level_votes = (int [_num_levels]) {}, \ + .num_levels = _num_levels, \ + .cur_level = _num_levels, \ + .lock = __MUTEX_INITIALIZER(_name.lock) \ + } + +#define DEFINE_VDD_REGS_INIT(_name, _num_regulators) \ + struct clk_vdd_class _name = { \ + .class_name = #_name, \ + .regulator = (struct regulator * [_num_regulators]) {}, \ + .num_regulators = _num_regulators, \ + .lock = __MUTEX_INITIALIZER(_name.lock) \ + } + /** * struct clk_hw - handle for traversing from a struct clk to its corresponding * hardware-specific structure. struct clk_hw should be declared within struct |