clk: ti: mux: add support for legacy mux init

Legacy clock data is initialized slightly differently compared to
DT clocks, thus add support for this.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>

drivers/clk/ti/clk.c

@@ -211,6 +211,9 @@ struct clk __init *ti_clk_register_clk(struct ti_clk *setup)
 		clk = clk_register_fixed_rate(NULL, setup->name, NULL,
 					      CLK_IS_ROOT, fixed->frequency);
 		break;
+	case TI_CLK_MUX:
+		clk = ti_clk_register_mux(setup);
+		break;
 	case TI_CLK_FIXED_FACTOR:
 		fixed_factor = setup->data;
 

drivers/clk/ti/clock.h

@@ -153,6 +153,10 @@ struct ti_clk_dpll {
 	u8 recal_st_bit;
 };
 
+struct clk *ti_clk_register_mux(struct ti_clk *setup);
+
+struct clk_hw *ti_clk_build_component_mux(struct ti_clk_mux *setup);
+
 void ti_clk_patch_legacy_clks(struct ti_clk **patch);
 struct clk *ti_clk_register_clk(struct ti_clk *setup);
 int ti_clk_register_legacy_clks(struct ti_clk_alias *clks);

drivers/clk/ti/mux.c

@@ -21,6 +21,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/clk/ti.h>
+#include "clock.h"
 
 #undef pr_fmt
 #define pr_fmt(fmt) "%s: " fmt, __func__
@@ -144,6 +145,39 @@ static struct clk *_register_mux(struct device *dev, const char *name,
 	return clk;
 }
 
+struct clk *ti_clk_register_mux(struct ti_clk *setup)
+{
+	struct ti_clk_mux *mux;
+	u32 flags;
+	u8 mux_flags = 0;
+	struct clk_omap_reg *reg_setup;
+	u32 reg;
+	u32 mask;
+
+	reg_setup = (struct clk_omap_reg *)&reg;
+
+	mux = setup->data;
+	flags = CLK_SET_RATE_NO_REPARENT;
+
+	mask = mux->num_parents;
+	if (!(mux->flags & CLKF_INDEX_STARTS_AT_ONE))
+		mask--;
+
+	mask = (1 << fls(mask)) - 1;
+	reg_setup->index = mux->module;
+	reg_setup->offset = mux->reg;
+
+	if (mux->flags & CLKF_INDEX_STARTS_AT_ONE)
+		mux_flags |= CLK_MUX_INDEX_ONE;
+
+	if (mux->flags & CLKF_SET_RATE_PARENT)
+		flags |= CLK_SET_RATE_PARENT;
+
+	return _register_mux(NULL, setup->name, mux->parents, mux->num_parents,
+			     flags, (void __iomem *)reg, mux->bit_shift, mask,
+			     mux_flags, NULL, NULL);
+}
+
 /**
  * of_mux_clk_setup - Setup function for simple mux rate clock
  * @node: DT node for the clock
@@ -194,8 +228,9 @@ static void of_mux_clk_setup(struct device_node *node)
 
 	mask = (1 << fls(mask)) - 1;
 
-	clk = _register_mux(NULL, node->name, parent_names, num_parents, flags,
-			    reg, shift, mask, clk_mux_flags, NULL, NULL);
+	clk = _register_mux(NULL, node->name, parent_names, num_parents,
+			    flags, reg, shift, mask, clk_mux_flags, NULL,
+			    NULL);
 
 	if (!IS_ERR(clk))
 		of_clk_add_provider(node, of_clk_src_simple_get, clk);
@@ -205,6 +240,37 @@ static void of_mux_clk_setup(struct device_node *node)
 }
 CLK_OF_DECLARE(mux_clk, "ti,mux-clock", of_mux_clk_setup);
 
+struct clk_hw *ti_clk_build_component_mux(struct ti_clk_mux *setup)
+{
+	struct clk_mux *mux;
+	struct clk_omap_reg *reg;
+	int num_parents;
+
+	if (!setup)
+		return NULL;
+
+	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+	if (!mux)
+		return ERR_PTR(-ENOMEM);
+
+	reg = (struct clk_omap_reg *)&mux->reg;
+
+	mux->shift = setup->bit_shift;
+
+	reg->index = setup->module;
+	reg->offset = setup->reg;
+
+	if (setup->flags & CLKF_INDEX_STARTS_AT_ONE)
+		mux->flags |= CLK_MUX_INDEX_ONE;
+
+	num_parents = setup->num_parents;
+
+	mux->mask = num_parents - 1;
+	mux->mask = (1 << fls(mux->mask)) - 1;
+
+	return &mux->hw;
+}
+
 static void __init of_ti_composite_mux_clk_setup(struct device_node *node)
 {
 	struct clk_mux *mux;