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| author | Juha Yrjola <juha.yrjola@solidboot.com> | 2006-09-25 12:41:43 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2006-09-25 12:41:43 +0300 |
| commit | ab0a2b9b9f536d860681dacbfb5784bd76e88a1e (patch) | |
| tree | 88735e033544ec2836065fd3c39aa4ebbcbbb002 /arch | |
| parent | 12583a70ac6b6641905e37fdd61a7f711fb4ce2b (diff) | |
| download | linux-ab0a2b9b9f536d860681dacbfb5784bd76e88a1e.tar.gz linux-ab0a2b9b9f536d860681dacbfb5784bd76e88a1e.tar.bz2 linux-ab0a2b9b9f536d860681dacbfb5784bd76e88a1e.zip | |
ARM: OMAP: Add support for forcing osc_ck on
Some boards might use the oscillator clock for powering
external peripherals. Add support for making sure osc_ck
stays active even when trying to go to sleep.
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/clock.c | 18 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clock.h | 2 |
2 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c index 302d5a796340..737aca4cff13 100644 --- a/arch/arm/mach-omap2/clock.c +++ b/arch/arm/mach-omap2/clock.c @@ -81,6 +81,14 @@ static void omap2_propagate_rate(struct clk * clk) propagate_rate(clk); } +static void omap2_set_osc_ck(int enable) +{ + if (enable) + PRCM_CLKSRC_CTRL &= ~(0x3 << 3); + else + PRCM_CLKSRC_CTRL |= 0x3 << 3; +} + /* Enable an APLL if off */ static void omap2_clk_fixed_enable(struct clk *clk) { @@ -121,6 +129,11 @@ static int _omap2_clk_enable(struct clk * clk) if (clk->flags & ALWAYS_ENABLED) return 0; + if (unlikely(clk == &osc_ck)) { + omap2_set_osc_ck(1); + return 0; + } + if (unlikely(clk->enable_reg == 0)) { printk(KERN_ERR "clock.c: Enable for %s without enable code\n", clk->name); @@ -158,6 +171,11 @@ static void _omap2_clk_disable(struct clk *clk) { u32 regval32; + if (unlikely(clk == &osc_ck)) { + omap2_set_osc_ck(0); + return; + } + if (clk->enable_reg == 0) return; diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h index 2781dfbc5164..223152d9663f 100644 --- a/arch/arm/mach-omap2/clock.h +++ b/arch/arm/mach-omap2/clock.h @@ -560,7 +560,7 @@ static struct clk osc_ck = { /* (*12, *13, 19.2, *26, 38.4)MHz */ .name = "osc_ck", .rate = 26000000, /* fixed up in clock init */ .flags = CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X | - RATE_FIXED | ALWAYS_ENABLED | RATE_PROPAGATES, + RATE_FIXED | RATE_PROPAGATES, }; /* With out modem likely 12MHz, with modem likely 13MHz */ |