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authorJuha Yrjola <juha.yrjola@solidboot.com>2006-09-25 12:41:43 +0300
committerTony Lindgren <tony@atomide.com>2006-09-25 12:41:43 +0300
commitab0a2b9b9f536d860681dacbfb5784bd76e88a1e (patch)
tree88735e033544ec2836065fd3c39aa4ebbcbbb002 /arch/arm/mach-omap2
parent12583a70ac6b6641905e37fdd61a7f711fb4ce2b (diff)
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/arm/mach-omap2')
-rw-r--r--arch/arm/mach-omap2/clock.c18
-rw-r--r--arch/arm/mach-omap2/clock.h2
2 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 302d5a79634..737aca4cff1 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 2781dfbc516..223152d9663 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 */