diff options
Diffstat (limited to 'drivers/clk/qcom/clk-rcg2.c')
| -rw-r--r-- | drivers/clk/qcom/clk-rcg2.c | 76 |
1 files changed, 67 insertions, 9 deletions
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c index a071bba8018c..1a0985ae20d2 100644 --- a/drivers/clk/qcom/clk-rcg2.c +++ b/drivers/clk/qcom/clk-rcg2.c @@ -47,6 +47,11 @@ #define N_REG 0xc #define D_REG 0x10 +enum freq_policy { + FLOOR, + CEIL, +}; + static int clk_rcg2_is_enabled(struct clk_hw *hw) { struct clk_rcg2 *rcg = to_clk_rcg2(hw); @@ -176,15 +181,26 @@ clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) return calc_rate(parent_rate, m, n, mode, hid_div); } -static int _freq_tbl_determine_rate(struct clk_hw *hw, - const struct freq_tbl *f, struct clk_rate_request *req) +static int _freq_tbl_determine_rate(struct clk_hw *hw, const struct freq_tbl *f, + struct clk_rate_request *req, + enum freq_policy policy) { unsigned long clk_flags, rate = req->rate; struct clk_hw *p; struct clk_rcg2 *rcg = to_clk_rcg2(hw); int index; - f = qcom_find_freq(f, rate); + switch (policy) { + case FLOOR: + f = qcom_find_freq_floor(f, rate); + break; + case CEIL: + f = qcom_find_freq(f, rate); + break; + default: + return -EINVAL; + }; + if (!f) return -EINVAL; @@ -221,7 +237,15 @@ static int clk_rcg2_determine_rate(struct clk_hw *hw, { struct clk_rcg2 *rcg = to_clk_rcg2(hw); - return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req); + return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req, CEIL); +} + +static int clk_rcg2_determine_floor_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_rcg2 *rcg = to_clk_rcg2(hw); + + return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req, FLOOR); } static int clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f) @@ -265,12 +289,23 @@ static int clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f) return update_config(rcg); } -static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate) +static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate, + enum freq_policy policy) { struct clk_rcg2 *rcg = to_clk_rcg2(hw); const struct freq_tbl *f; - f = qcom_find_freq(rcg->freq_tbl, rate); + switch (policy) { + case FLOOR: + f = qcom_find_freq_floor(rcg->freq_tbl, rate); + break; + case CEIL: + f = qcom_find_freq(rcg->freq_tbl, rate); + break; + default: + return -EINVAL; + }; + if (!f) return -EINVAL; @@ -280,13 +315,25 @@ static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate) static int clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { - return __clk_rcg2_set_rate(hw, rate); + return __clk_rcg2_set_rate(hw, rate, CEIL); +} + +static int clk_rcg2_set_floor_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + return __clk_rcg2_set_rate(hw, rate, FLOOR); } static int clk_rcg2_set_rate_and_parent(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate, u8 index) { - return __clk_rcg2_set_rate(hw, rate); + return __clk_rcg2_set_rate(hw, rate, CEIL); +} + +static int clk_rcg2_set_floor_rate_and_parent(struct clk_hw *hw, + unsigned long rate, unsigned long parent_rate, u8 index) +{ + return __clk_rcg2_set_rate(hw, rate, FLOOR); } const struct clk_ops clk_rcg2_ops = { @@ -300,6 +347,17 @@ const struct clk_ops clk_rcg2_ops = { }; EXPORT_SYMBOL_GPL(clk_rcg2_ops); +const struct clk_ops clk_rcg2_floor_ops = { + .is_enabled = clk_rcg2_is_enabled, + .get_parent = clk_rcg2_get_parent, + .set_parent = clk_rcg2_set_parent, + .recalc_rate = clk_rcg2_recalc_rate, + .determine_rate = clk_rcg2_determine_floor_rate, + .set_rate = clk_rcg2_set_floor_rate, + .set_rate_and_parent = clk_rcg2_set_floor_rate_and_parent, +}; +EXPORT_SYMBOL_GPL(clk_rcg2_floor_ops); + static int clk_rcg2_shared_force_enable(struct clk_hw *hw, unsigned long rate) { struct clk_rcg2 *rcg = to_clk_rcg2(hw); @@ -323,7 +381,7 @@ static int clk_rcg2_shared_force_enable(struct clk_hw *hw, unsigned long rate) pr_err("%s: RCG did not turn on\n", name); /* set clock rate */ - ret = __clk_rcg2_set_rate(hw, rate); + ret = __clk_rcg2_set_rate(hw, rate, CEIL); if (ret) return ret; |