ARM: davinci: clk framework support for enable/disable functionality
DaVinci clock implementation does not support clock enable/disable
functionality on non-PSC clock nodes.
On DA850 SoC, EHRPWM module requires support for enable/disable
of TBCLK controlled using a system module register.
This patch adds a method for enabling/disabling non-PSC clocks
into DaVinci clock implementation.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c
index d458558..dc9a470 100644
--- a/arch/arm/mach-davinci/clock.c
+++ b/arch/arm/mach-davinci/clock.c
@@ -35,19 +35,26 @@
{
if (clk->parent)
__clk_enable(clk->parent);
- if (clk->usecount++ == 0 && (clk->flags & CLK_PSC))
- davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc,
- true, clk->flags);
+ if (clk->usecount++ == 0) {
+ if (clk->flags & CLK_PSC)
+ davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc,
+ true, clk->flags);
+ else if (clk->clk_enable)
+ clk->clk_enable(clk);
+ }
}
static void __clk_disable(struct clk *clk)
{
if (WARN_ON(clk->usecount == 0))
return;
- if (--clk->usecount == 0 && !(clk->flags & CLK_PLL) &&
- (clk->flags & CLK_PSC))
- davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc,
- false, clk->flags);
+ if (--clk->usecount == 0) {
+ if (!(clk->flags & CLK_PLL) && (clk->flags & CLK_PSC))
+ davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc,
+ false, clk->flags);
+ else if (clk->clk_disable)
+ clk->clk_disable(clk);
+ }
if (clk->parent)
__clk_disable(clk->parent);
}
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h
index 8694b39..1e4e836 100644
--- a/arch/arm/mach-davinci/clock.h
+++ b/arch/arm/mach-davinci/clock.h
@@ -104,6 +104,8 @@
int (*set_rate) (struct clk *clk, unsigned long rate);
int (*round_rate) (struct clk *clk, unsigned long rate);
int (*reset) (struct clk *clk, bool reset);
+ void (*clk_enable) (struct clk *clk);
+ void (*clk_disable) (struct clk *clk);
};
/* Clock flags: SoC-specific flags start at BIT(16) */
