From: Jaecheol Lee <jc.lee@xxxxxxxxxxx>
FOUT APLL clock is used as a source of ARM core clock. So we need that the
clock source can be changed dynamically by using CPUFREQ driver. This patch
can give correct frequency when calling clk_get_rate() function.
Signed-off-by: Jaecheol Lee <jc.lee@xxxxxxxxxxx>
Signed-off-by: Sangwook Ju <sw.ju@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
arch/arm/mach-s5pv310/clock.c | 16 +++++++++++++++-
1 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-s5pv310/clock.c b/arch/arm/mach-s5pv310/clock.c
index fdce2b4..752a07e 100644
--- a/arch/arm/mach-s5pv310/clock.c
+++ b/arch/arm/mach-s5pv310/clock.c
@@ -990,6 +990,17 @@ static struct clksrc_clk *sysclks[] = {
&clk_dout_mmc4,
};
+static int xtal_rate;
+
+static unsigned long s5pv310_fout_apll_get_rate(struct clk *clk)
+{
+ return s5p_get_pll45xx(xtal_rate, __raw_readl(S5P_APLL_CON0), pll_4508);
+}
+
+static struct clk_ops s5pv310_fout_apll_ops = {
+ .get_rate = s5pv310_fout_apll_get_rate,
+};
+
void __init_or_cpufreq s5pv310_setup_clocks(void)
{
struct clk *xtal_clk;
@@ -1013,6 +1024,9 @@ void __init_or_cpufreq s5pv310_setup_clocks(void)
BUG_ON(IS_ERR(xtal_clk));
xtal = clk_get_rate(xtal_clk);
+
+ xtal_rate = xtal;
+
clk_put(xtal_clk);
printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
@@ -1026,7 +1040,7 @@ void __init_or_cpufreq s5pv310_setup_clocks(void)
vpll = s5p_get_pll46xx(vpllsrc, __raw_readl(S5P_VPLL_CON0),
__raw_readl(S5P_VPLL_CON1), pll_4650);
- clk_fout_apll.rate = apll;
+ clk_fout_apll.ops = &s5pv310_fout_apll_ops;
clk_fout_mpll.rate = mpll;
clk_fout_epll.rate = epll;
clk_fout_vpll.rate = vpll;
--
1.6.2.5
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