ARM: davinci: add support for multiple power domains

On a new SoC based on DaVinci, there are multiple power
domains similar to that in C6670 (c6x). Currently the
clock module assumes that there are only two power domains
(0 and 1).

This patch removes this restriction to allow porting on to
the new SoC.

Reviewed-by :Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

3 files changed, 10 insertions, 17 deletions

diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c
index 00861139101d..008772e3b843 100644
--- a/arch/arm/mach-davinci/clock.c
+++ b/arch/arm/mach-davinci/clock.c
@@ -31,19 +31,12 @@ static LIST_HEAD(clocks);
 static DEFINE_MUTEX(clocks_mutex);
 static DEFINE_SPINLOCK(clockfw_lock);
 
-static unsigned psc_domain(struct clk *clk)
-{
-        return (clk->flags & PSC_DSP)
-                ? DAVINCI_GPSC_DSPDOMAIN
-                : DAVINCI_GPSC_ARMDOMAIN;
-}
-
 static void __clk_enable(struct clk *clk)
 {
         if (clk->parent)
                 __clk_enable(clk->parent);
         if (clk->usecount++ == 0 && (clk->flags & CLK_PSC))
-                davinci_psc_config(psc_domain(clk), clk->gpsc, clk->lpsc,
+                davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc,
                                 true, clk->flags);
 }
 
@@ -53,7 +46,7 @@ static void __clk_disable(struct clk *clk)
                 return;
         if (--clk->usecount == 0 && !(clk->flags & CLK_PLL) &&
             (clk->flags & CLK_PSC))
-                davinci_psc_config(psc_domain(clk), clk->gpsc, clk->lpsc,
+                davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc,
                                 false, clk->flags);
         if (clk->parent)
                 __clk_disable(clk->parent);
@@ -237,7 +230,7 @@ static int __init clk_disable_unused(void)
 
                 pr_debug("Clocks: disable unused %s\n", ck->name);
 
-                davinci_psc_config(psc_domain(ck), ck->gpsc, ck->lpsc,
+                davinci_psc_config(ck->domain, ck->gpsc, ck->lpsc,
                                 false, ck->flags);
         }
         spin_unlock_irq(&clockfw_lock);
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h
index a705f367a84d..46f0f1bf1a4c 100644
--- a/arch/arm/mach-davinci/clock.h
+++ b/arch/arm/mach-davinci/clock.h
@@ -93,6 +93,7 @@ struct clk {
         u8                      usecount;
         u8                      lpsc;
         u8                      gpsc;
+        u8                      domain;
         u32                     flags;
         struct clk              *parent;
         struct list_head        children;       /* list of children */
@@ -107,11 +108,10 @@ struct clk {
 /* Clock flags: SoC-specific flags start at BIT(16) */
 #define ALWAYS_ENABLED          BIT(1)
 #define CLK_PSC                 BIT(2)
-#define PSC_DSP                 BIT(3) /* PSC uses DSP domain, not ARM */
-#define CLK_PLL                 BIT(4) /* PLL-derived clock */
-#define PRE_PLL                 BIT(5) /* source is before PLL mult/div */
-#define PSC_SWRSTDISABLE        BIT(6) /* Disable state is SwRstDisable */
-#define PSC_FORCE               BIT(7) /* Force module state transtition */
+#define CLK_PLL                 BIT(3) /* PLL-derived clock */
+#define PRE_PLL                 BIT(4) /* source is before PLL mult/div */
+#define PSC_SWRSTDISABLE        BIT(5) /* Disable state is SwRstDisable */
+#define PSC_FORCE               BIT(6) /* Force module state transtition */
 
 #define CLK(dev, con, ck)       \
         {                       \
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 3470983aa343..b95097dbdfed 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -130,7 +130,7 @@ static struct clk dsp_clk = {
         .name = "dsp",
         .parent = &pll1_sysclk1,
         .lpsc = DAVINCI_LPSC_GEM,
-        .flags = PSC_DSP,
+        .domain = DAVINCI_GPSC_DSPDOMAIN,
         .usecount = 1,                  /* REVISIT how to disable? */
 };
 
@@ -145,7 +145,7 @@ static struct clk vicp_clk = {
         .name = "vicp",
         .parent = &pll1_sysclk2,
         .lpsc = DAVINCI_LPSC_IMCOP,
-        .flags = PSC_DSP,
+        .domain = DAVINCI_GPSC_DSPDOMAIN,
         .usecount = 1,                  /* REVISIT how to disable? */
 };