diff options
author | Philip Avinash <avinashphilip@ti.com> | 2013-03-25 15:07:48 +0530 |
---|---|---|
committer | Sekhar Nori <nsekhar@ti.com> | 2013-04-01 16:54:47 +0530 |
commit | c6007ffe842892484027a40b6ac18d29ac11e2ce (patch) | |
tree | d24db9aab259a37ae6de4203a420e77bffe45bdf /arch | |
parent | 07961ac7c0ee8b546658717034fe692fd12eefa9 (diff) | |
download | linux-c6007ffe842892484027a40b6ac18d29ac11e2ce.tar.bz2 |
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-davinci/clock.c | 21 | ||||
-rw-r--r-- | arch/arm/mach-davinci/clock.h | 2 |
2 files changed, 16 insertions, 7 deletions
diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c index d458558ee84a..dc9a470ff9c5 100644 --- a/arch/arm/mach-davinci/clock.c +++ b/arch/arm/mach-davinci/clock.c @@ -35,19 +35,26 @@ 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(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 8694b395fc92..1e4e836173a1 100644 --- a/arch/arm/mach-davinci/clock.h +++ b/arch/arm/mach-davinci/clock.h @@ -104,6 +104,8 @@ struct clk { 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) */ |