ARM: PNX4008: provide clock enable/disable methods and initialization

Acked-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 26 insertions, 13 deletions

diff --git a/arch/arm/mach-pnx4008/clock.c b/arch/arm/mach-pnx4008/clock.c
index f0cc91909090..3ad694e15968 100644
--- a/arch/arm/mach-pnx4008/clock.c
+++ b/arch/arm/mach-pnx4008/clock.c
@@ -57,18 +57,19 @@ static void propagate_rate(struct clk *clk)
         }
 }
 
-static inline void clk_reg_disable(struct clk *clk)
+static void clk_reg_disable(struct clk *clk)
 {
         if (clk->enable_reg)
                 __raw_writel(__raw_readl(clk->enable_reg) &
                              ~(1 << clk->enable_shift), clk->enable_reg);
 }
 
-static inline void clk_reg_enable(struct clk *clk)
+static int clk_reg_enable(struct clk *clk)
 {
         if (clk->enable_reg)
                 __raw_writel(__raw_readl(clk->enable_reg) |
                              (1 << clk->enable_shift), clk->enable_reg);
+        return 0;
 }
 
 static inline void clk_reg_disable1(struct clk *clk)
@@ -814,7 +815,9 @@ static void local_clk_disable(struct clk *clk)
                 return;
 
         if (!(--clk->usecount)) {
-                if (!(clk->flags & FIXED_RATE) && clk->rate && clk->set_rate)
+                if (clk->disable)
+                        clk->disable(clk);
+                else if (!(clk->flags & FIXED_RATE) && clk->rate && clk->set_rate)
                         clk->set_rate(clk, 0);
                 if (clk->parent)
                         local_clk_disable(clk->parent);
@@ -832,8 +835,10 @@ static int local_clk_enable(struct clk *clk)
                                 goto out;
                 }
 
-                if (!(clk->flags & FIXED_RATE) && !clk->rate && clk->set_rate
-                    && clk->user_rate)
+                if (clk->enable)
+                        ret = clk->enable(clk);
+                else if (!(clk->flags & FIXED_RATE) && !clk->rate && clk->set_rate
+                            && clk->user_rate)
                         ret = clk->set_rate(clk, clk->user_rate);
 
                 if (ret != 0 && clk->parent) {
@@ -960,15 +965,21 @@ static int __init clk_init(void)
 
         for (clkp = onchip_clks; clkp < onchip_clks + ARRAY_SIZE(onchip_clks);
              clkp++) {
-                if (((*clkp)->flags & NEEDS_INITIALIZATION)
-                    && ((*clkp)->set_rate)) {
-                        (*clkp)->user_rate = (*clkp)->rate;
-                        local_set_rate((*clkp), (*clkp)->user_rate);
-                        if ((*clkp)->set_parent)
-                                (*clkp)->set_parent((*clkp), (*clkp)->parent);
+                struct clk *clk = *clkp;
+                if (clk->flags & NEEDS_INITIALIZATION) {
+                        if (clk->set_rate) {
+                                clk->user_rate = clk->rate;
+                                local_set_rate(clk, clk->user_rate);
+                                if (clk->set_parent)
+                                        clk->set_parent(clk, clk->parent);
+                        }
+                        if (clk->enable && clk->usecount)
+                                clk->enable(clk);
+                        if (clk->disable && !clk->usecount)
+                                clk->disable(clk);
                 }
                 pr_debug("%s: clock %s, rate %ld\n",
-                        __func__, (*clkp)->name, (*clkp)->rate);
+                        __func__, clk->name, clk->rate);
         }
 
         local_clk_enable(&ck_pll4);
diff --git a/arch/arm/mach-pnx4008/clock.h b/arch/arm/mach-pnx4008/clock.h
index 933e18133b96..39720d6c0d01 100644
--- a/arch/arm/mach-pnx4008/clock.h
+++ b/arch/arm/mach-pnx4008/clock.h
@@ -27,9 +27,11 @@ struct clk {
         u8 enable_shift1;
         u32 enable_reg1;
         u32 parent_switch_reg;
-         u32(*round_rate) (struct clk *, u32);
+        u32(*round_rate) (struct clk *, u32);
         int (*set_rate) (struct clk *, u32);
         int (*set_parent) (struct clk * clk, struct clk * parent);
+        int (*enable)(struct clk *);
+        void (*disable)(struct clk *);
 };
 
 /* Flags */