[Freedreno] [RFC PATCH v2 1/3] clk: qcom: add helper to map parent source to cfg value

[Dmitry Baryshkov]

Add qcom_find_src_cfg(), a helper that maps P_something (src) to the
register value (cfg).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/clk/qcom/common.c | 12 ++++++++++++
 drivers/clk/qcom/common.h |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 75f09e6e057e..63097b5b2f54 100644
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -81,6 +81,18 @@ int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, u8 cfg)
 }
 EXPORT_SYMBOL_GPL(qcom_find_cfg_index);
 
+int qcom_find_src_cfg(struct clk_hw *hw, const struct parent_map *map, u8 src)
+{
+	int i, num_parents = clk_hw_get_num_parents(hw);
+
+	for (i = 0; i < num_parents; i++)
+		if (src == map[i].src)
+			return map[i].cfg;
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(qcom_find_src_cfg);
+
 struct regmap *
 qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
 {
diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h
index 9c8f7b798d9f..1d02c7d61477 100644
--- a/drivers/clk/qcom/common.h
+++ b/drivers/clk/qcom/common.h
@@ -51,6 +51,8 @@ extern int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map,
 			       u8 src);
 extern int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map,
 			       u8 cfg);
+extern int qcom_find_src_cfg(struct clk_hw *hw, const struct parent_map *map,
+			     u8 src);
 
 extern int qcom_cc_register_board_clk(struct device *dev, const char *path,
 				      const char *name, unsigned long rate);
-- 
2.39.2