clk: Make clk API return per-user struct clk instances

Moves clock state to struct clk_core, but takes care to change as little API as
possible.

struct clk_hw still has a pointer to a struct clk, which is the
implementation's per-user clk instance, for backwards compatibility.

The struct clk that clk_get_parent() returns isn't owned by the caller, but by
the clock implementation, so the former shouldn't call clk_put() on it.

Because some boards in mach-omap2 still register clocks statically, their clock
registration had to be updated to take into account that the clock information
is stored in struct clk_core now.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
[mturquette@linaro.org: adapted clk_has_parent to struct clk_core
                        applied OMAP3+ DPLL fix from Tero & Tony]

1 files changed, 6 insertions, 5 deletions

diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index c2da2a0..49752d7 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -410,7 +410,7 @@ int omap3_noncore_dpll_enable(struct clk_hw *hw)
 	struct clk_hw_omap *clk = to_clk_hw_omap(hw);
 	int r;
 	struct dpll_data *dd;
-	struct clk *parent;
+	struct clk_hw *parent;
 
 	dd = clk->dpll_data;
 	if (!dd)
@@ -427,13 +427,13 @@ int omap3_noncore_dpll_enable(struct clk_hw *hw)
 		}
 	}
 
-	parent = __clk_get_parent(hw->clk);
+	parent = __clk_get_hw(__clk_get_parent(hw->clk));
 
 	if (__clk_get_rate(hw->clk) == __clk_get_rate(dd->clk_bypass)) {
-		WARN_ON(parent != dd->clk_bypass);
+		WARN_ON(parent != __clk_get_hw(dd->clk_bypass));
 		r = _omap3_noncore_dpll_bypass(clk);
 	} else {
-		WARN_ON(parent != dd->clk_ref);
+		WARN_ON(parent != __clk_get_hw(dd->clk_ref));
 		r = _omap3_noncore_dpll_lock(clk);
 	}
 
@@ -549,7 +549,8 @@ int omap3_noncore_dpll_set_rate(struct clk_hw *hw, unsigned long rate,
 	if (!dd)
 		return -EINVAL;
 
-	if (__clk_get_parent(hw->clk) != dd->clk_ref)
+	if (__clk_get_hw(__clk_get_parent(hw->clk)) !=
+	    __clk_get_hw(dd->clk_ref))
 		return -EINVAL;
 
 	if (dd->last_rounded_rate == 0)