clk: mediatek: add infrasys clock mux support
This patch adds infrasys clock mux support for mediatek clock drivers.
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index a537ff2..207a4c6 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -303,6 +303,24 @@
return mtk_factor_recalc_rate(fdiv, rate);
}
+static ulong mtk_infrasys_get_factor_rate(struct clk *clk, u32 off)
+{
+ struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+ const struct mtk_fixed_factor *fdiv = &priv->tree->fdivs[off];
+ ulong rate;
+
+ switch (fdiv->flags & CLK_PARENT_MASK) {
+ case CLK_PARENT_TOPCKGEN:
+ rate = mtk_clk_find_parent_rate(clk, fdiv->parent,
+ priv->parent);
+ break;
+ default:
+ rate = mtk_clk_find_parent_rate(clk, fdiv->parent, NULL);
+ }
+
+ return mtk_factor_recalc_rate(fdiv, rate);
+}
+
static ulong mtk_topckgen_get_mux_rate(struct clk *clk, u32 off)
{
struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
@@ -331,6 +349,33 @@
return priv->tree->xtal_rate;
}
+static ulong mtk_infrasys_get_mux_rate(struct clk *clk, u32 off)
+{
+ struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+ const struct mtk_composite *mux = &priv->tree->muxes[off];
+ u32 index;
+
+ index = readl(priv->base + mux->mux_reg);
+ index &= mux->mux_mask << mux->mux_shift;
+ index = index >> mux->mux_shift;
+
+ if (mux->parent[index] > 0 ||
+ (mux->parent[index] == CLK_XTAL &&
+ priv->tree->flags & CLK_BYPASS_XTAL)) {
+ switch (mux->flags & CLK_PARENT_MASK) {
+ case CLK_PARENT_TOPCKGEN:
+ return mtk_clk_find_parent_rate(clk, mux->parent[index],
+ priv->parent);
+ break;
+ default:
+ return mtk_clk_find_parent_rate(clk, mux->parent[index],
+ NULL);
+ break;
+ }
+ }
+ return 0;
+}
+
static ulong mtk_topckgen_get_rate(struct clk *clk)
{
struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
@@ -343,6 +388,25 @@
else
return mtk_topckgen_get_mux_rate(clk, clk->id -
priv->tree->muxes_offs);
+}
+
+static ulong mtk_infrasys_get_rate(struct clk *clk)
+{
+ struct mtk_clk_priv *priv = dev_get_priv(clk->dev);
+
+ ulong rate;
+
+ if (clk->id < priv->tree->fdivs_offs) {
+ rate = priv->tree->fclks[clk->id].rate;
+ } else if (clk->id < priv->tree->muxes_offs) {
+ rate = mtk_infrasys_get_factor_rate(clk, clk->id -
+ priv->tree->fdivs_offs);
+ } else {
+ rate = mtk_infrasys_get_mux_rate(clk, clk->id -
+ priv->tree->muxes_offs);
+ }
+
+ return rate;
}
static int mtk_clk_mux_enable(struct clk *clk)
@@ -493,6 +557,13 @@
.set_parent = mtk_common_clk_set_parent,
};
+const struct clk_ops mtk_clk_infrasys_ops = {
+ .enable = mtk_clk_mux_enable,
+ .disable = mtk_clk_mux_disable,
+ .get_rate = mtk_infrasys_get_rate,
+ .set_parent = mtk_common_clk_set_parent,
+};
+
const struct clk_ops mtk_clk_gate_ops = {
.enable = mtk_clk_gate_enable,
.disable = mtk_clk_gate_disable,
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 4185487..e7c61ae 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -28,7 +28,8 @@
#define CLK_PARENT_APMIXED BIT(4)
#define CLK_PARENT_TOPCKGEN BIT(5)
-#define CLK_PARENT_MASK GENMASK(5, 4)
+#define CLK_PARENT_INFRASYS BIT(6)
+#define CLK_PARENT_MASK GENMASK(6, 4)
#define ETHSYS_HIFSYS_RST_CTRL_OFS 0x34
@@ -220,6 +221,7 @@
extern const struct clk_ops mtk_clk_apmixedsys_ops;
extern const struct clk_ops mtk_clk_topckgen_ops;
+extern const struct clk_ops mtk_clk_infrasys_ops;
extern const struct clk_ops mtk_clk_gate_ops;
int mtk_common_clk_init(struct udevice *dev,