clk: ti: convert to use proper register definition for all accesses

Currently, TI clock driver uses an encapsulated struct that is cast into
a void pointer to store all register addresses. This can be considered
as rather nasty hackery, and prevents from expanding the register
address field also. Instead, replace all the code to use proper struct
in place for this, which contains all the previously used data.

This patch is rather large as it is touching multiple files, but this
can't be split up as we need to avoid any boot breakage.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>

1 files changed, 14 insertions, 18 deletions

diff --git a/drivers/clk/ti/gate.c b/drivers/clk/ti/gate.c
index 77f0920e12f1..7151ec3a1b07 100644
--- a/drivers/clk/ti/gate.c
+++ b/drivers/clk/ti/gate.c
@@ -76,15 +76,15 @@ static int omap36xx_gate_clk_enable_with_hsdiv_restore(struct clk_hw *hw)
 
 	/* Restore the dividers */
 	if (!ret) {
-		orig_v = ti_clk_ll_ops->clk_readl(parent->reg);
+		orig_v = ti_clk_ll_ops->clk_readl(&parent->reg);
 		dummy_v = orig_v;
 
 		/* Write any other value different from the Read value */
 		dummy_v ^= (1 << parent->shift);
-		ti_clk_ll_ops->clk_writel(dummy_v, parent->reg);
+		ti_clk_ll_ops->clk_writel(dummy_v, &parent->reg);
 
 		/* Write the original divider */
-		ti_clk_ll_ops->clk_writel(orig_v, parent->reg);
+		ti_clk_ll_ops->clk_writel(orig_v, &parent->reg);
 	}
 
 	return ret;
@@ -92,7 +92,7 @@ static int omap36xx_gate_clk_enable_with_hsdiv_restore(struct clk_hw *hw)
 
 static struct clk *_register_gate(struct device *dev, const char *name,
 				  const char *parent_name, unsigned long flags,
-				  void __iomem *reg, u8 bit_idx,
+				  struct clk_omap_reg *reg, u8 bit_idx,
 				  u8 clk_gate_flags, const struct clk_ops *ops,
 				  const struct clk_hw_omap_ops *hw_ops)
 {
@@ -109,7 +109,7 @@ static struct clk *_register_gate(struct device *dev, const char *name,
 	init.name = name;
 	init.ops = ops;
 
-	clk_hw->enable_reg = reg;
+	memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
 	clk_hw->enable_bit = bit_idx;
 	clk_hw->ops = hw_ops;
 
@@ -133,8 +133,7 @@ struct clk *ti_clk_register_gate(struct ti_clk *setup)
 {
 	const struct clk_ops *ops = &omap_gate_clk_ops;
 	const struct clk_hw_omap_ops *hw_ops = NULL;
-	u32 reg;
-	struct clk_omap_reg *reg_setup;
+	struct clk_omap_reg reg;
 	u32 flags = 0;
 	u8 clk_gate_flags = 0;
 	struct ti_clk_gate *gate;
@@ -144,8 +143,6 @@ struct clk *ti_clk_register_gate(struct ti_clk *setup)
 	if (gate->flags & CLKF_INTERFACE)
 		return ti_clk_register_interface(setup);
 
-	reg_setup = (struct clk_omap_reg *)&reg;
-
 	if (gate->flags & CLKF_SET_RATE_PARENT)
 		flags |= CLK_SET_RATE_PARENT;
 
@@ -169,11 +166,12 @@ struct clk *ti_clk_register_gate(struct ti_clk *setup)
 	if (gate->flags & CLKF_AM35XX)
 		hw_ops = &clkhwops_am35xx_ipss_module_wait;
 
-	reg_setup->index = gate->module;
-	reg_setup->offset = gate->reg;
+	reg.index = gate->module;
+	reg.offset = gate->reg;
+	reg.ptr = NULL;
 
 	return _register_gate(NULL, setup->name, gate->parent, flags,
-			      (void __iomem *)reg, gate->bit_shift,
+			      &reg, gate->bit_shift,
 			      clk_gate_flags, ops, hw_ops);
 }
 
@@ -214,15 +212,14 @@ static void __init _of_ti_gate_clk_setup(struct device_node *node,
 {
 	struct clk *clk;
 	const char *parent_name;
-	void __iomem *reg = NULL;
+	struct clk_omap_reg reg;
 	u8 enable_bit = 0;
 	u32 val;
 	u32 flags = 0;
 	u8 clk_gate_flags = 0;
 
 	if (ops != &omap_gate_clkdm_clk_ops) {
-		reg = ti_clk_get_reg_addr(node, 0);
-		if (IS_ERR(reg))
+		if (ti_clk_get_reg_addr(node, 0, &reg))
 			return;
 
 		if (!of_property_read_u32(node, "ti,bit-shift", &val))
@@ -242,7 +239,7 @@ static void __init _of_ti_gate_clk_setup(struct device_node *node,
 	if (of_property_read_bool(node, "ti,set-bit-to-disable"))
 		clk_gate_flags |= INVERT_ENABLE;
 
-	clk = _register_gate(NULL, node->name, parent_name, flags, reg,
+	clk = _register_gate(NULL, node->name, parent_name, flags, &reg,
 			     enable_bit, clk_gate_flags, ops, hw_ops);
 
 	if (!IS_ERR(clk))
@@ -260,8 +257,7 @@ _of_ti_composite_gate_clk_setup(struct device_node *node,
 	if (!gate)
 		return;
 
-	gate->enable_reg = ti_clk_get_reg_addr(node, 0);
-	if (IS_ERR(gate->enable_reg))
+	if (ti_clk_get_reg_addr(node, 0, &gate->enable_reg))
 		goto cleanup;
 
 	of_property_read_u32(node, "ti,bit-shift", &val);