clk: ti: clkdm: move clkdm gate clock support code to clock driver

With the legacy clock data gone, this is no longer needed under platform,
so move it under the clock driver itself. Remove the exported clock driver
APIs as well, as these are not needed outside clock driver anymore.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

2 files changed, 79 insertions, 0 deletions

diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h
index 3652c26..83476d1 100644
--- a/drivers/clk/ti/clock.h
+++ b/drivers/clk/ti/clock.h
@@ -180,6 +180,9 @@ extern const struct clk_hw_omap_ops clkhwops_iclk;
 extern const struct clk_hw_omap_ops clkhwops_iclk_wait;
 extern const struct clk_hw_omap_ops clkhwops_omap2430_i2chs_wait;
 
+int omap2_clkops_enable_clkdm(struct clk_hw *hw);
+void omap2_clkops_disable_clkdm(struct clk_hw *hw);
+
 int omap2_dflt_clk_enable(struct clk_hw *hw);
 void omap2_dflt_clk_disable(struct clk_hw *hw);
 int omap2_dflt_clk_is_enabled(struct clk_hw *hw);
diff --git a/drivers/clk/ti/clockdomain.c b/drivers/clk/ti/clockdomain.c
index 35fe108..61ef87b 100644
--- a/drivers/clk/ti/clockdomain.c
+++ b/drivers/clk/ti/clockdomain.c
@@ -24,6 +24,82 @@
 #undef pr_fmt
 #define pr_fmt(fmt) "%s: " fmt, __func__
 
+/**
+ * omap2_clkops_enable_clkdm - increment usecount on clkdm of @hw
+ * @hw: struct clk_hw * of the clock being enabled
+ *
+ * Increment the usecount of the clockdomain of the clock pointed to
+ * by @hw; if the usecount is 1, the clockdomain will be "enabled."
+ * Only needed for clocks that don't use omap2_dflt_clk_enable() as
+ * their enable function pointer.  Passes along the return value of
+ * clkdm_clk_enable(), -EINVAL if @hw is not associated with a
+ * clockdomain, or 0 if clock framework-based clockdomain control is
+ * not implemented.
+ */
+int omap2_clkops_enable_clkdm(struct clk_hw *hw)
+{
+	struct clk_hw_omap *clk;
+	int ret = 0;
+
+	clk = to_clk_hw_omap(hw);
+
+	if (unlikely(!clk->clkdm)) {
+		pr_err("%s: %s: no clkdm set ?!\n", __func__,
+		       __clk_get_name(hw->clk));
+		return -EINVAL;
+	}
+
+	if (unlikely(clk->enable_reg))
+		pr_err("%s: %s: should use dflt_clk_enable ?!\n", __func__,
+		       __clk_get_name(hw->clk));
+
+	if (ti_clk_get_features()->flags & TI_CLK_DISABLE_CLKDM_CONTROL) {
+		pr_err("%s: %s: clkfw-based clockdomain control disabled ?!\n",
+		       __func__, __clk_get_name(hw->clk));
+		return 0;
+	}
+
+	ret = ti_clk_ll_ops->clkdm_clk_enable(clk->clkdm, hw->clk);
+	WARN(ret, "%s: could not enable %s's clockdomain %s: %d\n",
+	     __func__, __clk_get_name(hw->clk), clk->clkdm_name, ret);
+
+	return ret;
+}
+
+/**
+ * omap2_clkops_disable_clkdm - decrement usecount on clkdm of @hw
+ * @hw: struct clk_hw * of the clock being disabled
+ *
+ * Decrement the usecount of the clockdomain of the clock pointed to
+ * by @hw; if the usecount is 0, the clockdomain will be "disabled."
+ * Only needed for clocks that don't use omap2_dflt_clk_disable() as their
+ * disable function pointer.  No return value.
+ */
+void omap2_clkops_disable_clkdm(struct clk_hw *hw)
+{
+	struct clk_hw_omap *clk;
+
+	clk = to_clk_hw_omap(hw);
+
+	if (unlikely(!clk->clkdm)) {
+		pr_err("%s: %s: no clkdm set ?!\n", __func__,
+		       __clk_get_name(hw->clk));
+		return;
+	}
+
+	if (unlikely(clk->enable_reg))
+		pr_err("%s: %s: should use dflt_clk_disable ?!\n", __func__,
+		       __clk_get_name(hw->clk));
+
+	if (ti_clk_get_features()->flags & TI_CLK_DISABLE_CLKDM_CONTROL) {
+		pr_err("%s: %s: clkfw-based clockdomain control disabled ?!\n",
+		       __func__, __clk_get_name(hw->clk));
+		return;
+	}
+
+	ti_clk_ll_ops->clkdm_clk_disable(clk->clkdm, hw->clk);
+}
+
 static void __init of_ti_clockdomain_setup(struct device_node *node)
 {
 	struct clk *clk;