[PATCH v5 09/15] clk: qcom: clk-rcg: add clk_rcg_floor_ops ops

Ansuel Smith
2022-02-24T16:49:19Z

Add clk_rcg_floor_ops for clock that can't provide a stable freq and
require to use a floor freq to provide the requested frequency.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
drivers/clk/qcom/clk-rcg.c | 24 ++++++++++++++++++++++++
drivers/clk/qcom/clk-rcg.h | 1 +
2 files changed, 25 insertions(+)

diff --git a/drivers/clk/qcom/clk-rcg.c b/drivers/clk/qcom/clk-rcg.c
index a9d181d6be21..88845baa7f84 100644
--- a/drivers/clk/qcom/clk-rcg.c
+++ b/drivers/clk/qcom/clk-rcg.c
@@ -526,6 +526,19 @@ static int clk_rcg_set_rate(struct clk_hw *hw, unsigned long rate,
return __clk_rcg_set_rate(rcg, f);
}

+static int clk_rcg_set_floor_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_rcg *rcg = to_clk_rcg(hw);
+ const struct freq_tbl *f;
+
+ f = qcom_find_freq_floor(rcg->freq_tbl, rate);
+ if (!f)
+ return -EINVAL;
+
+ return __clk_rcg_set_rate(rcg, f);
+}
+
static int clk_rcg_bypass_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
@@ -816,6 +829,17 @@ const struct clk_ops clk_rcg_ops = {
};
EXPORT_SYMBOL_GPL(clk_rcg_ops);

+const struct clk_ops clk_rcg_floor_ops = {
+ .enable = clk_enable_regmap,
+ .disable = clk_disable_regmap,
+ .get_parent = clk_rcg_get_parent,
+ .set_parent = clk_rcg_set_parent,
+ .recalc_rate = clk_rcg_recalc_rate,
+ .determine_rate = clk_rcg_determine_rate,
+ .set_rate = clk_rcg_set_floor_rate,
+};
+EXPORT_SYMBOL_GPL(clk_rcg_floor_ops);
+
const struct clk_ops clk_rcg_bypass_ops = {
.enable = clk_enable_regmap,
.disable = clk_disable_regmap,
diff --git a/drivers/clk/qcom/clk-rcg.h b/drivers/clk/qcom/clk-rcg.h
index 99efcc7f8d88..00cea508d49e 100644
--- a/drivers/clk/qcom/clk-rcg.h
+++ b/drivers/clk/qcom/clk-rcg.h
@@ -86,6 +86,7 @@ struct clk_rcg {
};

extern const struct clk_ops clk_rcg_ops;
+extern const struct clk_ops clk_rcg_floor_ops;
extern const struct clk_ops clk_rcg_bypass_ops;
extern const struct clk_ops clk_rcg_bypass2_ops;
extern const struct clk_ops clk_rcg_pixel_ops;
--
2.34.1