This is yet another simple but odd driver for the audio block of the g12a
and sm1 SoC families.
For TDMOUT's sclk to be properly inverted, bit 29 of
AUDIO_CLK_TDMOUT_x_CTRL should be the inverse of bit 28.
IOW bit28 == !bit29 at all times
This setting is automatically applied on axg and the manual setting was
added on g12a.
Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
---
drivers/clk/meson/clk-phase.c | 56 +++++++++++++++++++++++++++++++++++
drivers/clk/meson/clk-phase.h | 6 ++++
2 files changed, 62 insertions(+)
diff --git a/drivers/clk/meson/clk-phase.c b/drivers/clk/meson/clk-phase.c
index fe22e171121a..a6763439f7d2 100644
--- a/drivers/clk/meson/clk-phase.c
+++ b/drivers/clk/meson/clk-phase.c
@@ -125,6 +125,62 @@ const struct clk_ops meson_clk_triphase_ops = {
};
EXPORT_SYMBOL_GPL(meson_clk_triphase_ops);
+/*
+ * This is a special clock for the audio controller.
+ * This drive a bit clock inverter for which the
+ * opposite value of the inverter bit needs to be manually
+ * set into another bit
+ */
+static inline struct meson_sclk_ws_inv_data *
+meson_sclk_ws_inv_data(struct clk_regmap *clk)
+{
+ return (struct meson_sclk_ws_inv_data *)clk->data;
+}
+
+static int meson_sclk_ws_inv_sync(struct clk_hw *hw)
+{
+ struct clk_regmap *clk = to_clk_regmap(hw);
+ struct meson_sclk_ws_inv_data *tph = meson_sclk_ws_inv_data(clk);
+ unsigned int val;
+
+ /* Get phase and sync the inverted value to ws */
+ val = meson_parm_read(clk->map, &tph->ph);
+ meson_parm_write(clk->map, &tph->ws, val ? 0 : 1);
+
+ return 0;
+}
+
+static int meson_sclk_ws_inv_get_phase(struct clk_hw *hw)
+{
+ struct clk_regmap *clk = to_clk_regmap(hw);
+ struct meson_sclk_ws_inv_data *tph = meson_sclk_ws_inv_data(clk);
+ unsigned int val;
+
+ val = meson_parm_read(clk->map, &tph->ph);
+
+ return meson_clk_degrees_from_val(val, tph->ph.width);
+}
+
+static int meson_sclk_ws_inv_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct clk_regmap *clk = to_clk_regmap(hw);
+ struct meson_sclk_ws_inv_data *tph = meson_sclk_ws_inv_data(clk);
+ unsigned int val;
+
+ val = meson_clk_degrees_to_val(degrees, tph->ph.width);
+ meson_parm_write(clk->map, &tph->ph, val);
+ meson_parm_write(clk->map, &tph->ws, val ? 0 : 1);
+ return 0;
+}
+
+const struct clk_ops meson_sclk_ws_inv_ops = {
+ .init = meson_sclk_ws_inv_sync,
+ .get_phase = meson_sclk_ws_inv_get_phase,
+ .set_phase = meson_sclk_ws_inv_set_phase,
+};
+EXPORT_SYMBOL_GPL(meson_sclk_ws_inv_ops);
+
+
MODULE_DESCRIPTION("Amlogic phase driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@xxxxxxxxxxxx>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/clk/meson/clk-phase.h b/drivers/clk/meson/clk-phase.h
index 5579f9ced142..b637b9b227bc 100644
--- a/drivers/clk/meson/clk-phase.h
+++ b/drivers/clk/meson/clk-phase.h
@@ -20,7 +20,13 @@ struct meson_clk_triphase_data {
struct parm ph2;
};
+struct meson_sclk_ws_inv_data {
+ struct parm ph;
+ struct parm ws;
+};
+
extern const struct clk_ops meson_clk_phase_ops;
extern const struct clk_ops meson_clk_triphase_ops;
+extern const struct clk_ops meson_sclk_ws_inv_ops;
#endif /* __MESON_CLK_PHASE_H */
--
2.25.4
