ARM: OMAP: add SoSSI clock
This is needed, so that disabling the SoSSI clock during idle can
be prevented.
Signed-off-by: Imre Deak <imre.deak@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap1/clock.c b/arch/arm/mach-omap1/clock.c
index f625f6d..5d9faa6 100644
--- a/arch/arm/mach-omap1/clock.c
+++ b/arch/arm/mach-omap1/clock.c
@@ -49,6 +49,15 @@
clk->rate = 12000000;
}
+static void omap1_sossi_recalc(struct clk *clk)
+{
+ u32 div = omap_readl(MOD_CONF_CTRL_1);
+
+ div = (div >> 17) & 0x7;
+ div++;
+ clk->rate = clk->parent->rate / div;
+}
+
static int omap1_clk_enable_dsp_domain(struct clk *clk)
{
int retval;
@@ -396,6 +405,31 @@
return 0;
}
+static int omap1_set_sossi_rate(struct clk *clk, unsigned long rate)
+{
+ u32 l;
+ int div;
+ unsigned long p_rate;
+
+ p_rate = clk->parent->rate;
+ /* Round towards slower frequency */
+ div = (p_rate + rate - 1) / rate;
+ div--;
+ if (div < 0 || div > 7)
+ return -EINVAL;
+
+ l = omap_readl(MOD_CONF_CTRL_1);
+ l &= ~(7 << 17);
+ l |= div << 17;
+ omap_writel(l, MOD_CONF_CTRL_1);
+
+ clk->rate = p_rate / (div + 1);
+ if (unlikely(clk->flags & RATE_PROPAGATES))
+ propagate_rate(clk);
+
+ return 0;
+}
+
static long omap1_round_ext_clk_rate(struct clk * clk, unsigned long rate)
{
return 96000000 / calc_ext_dsor(rate);