[ARM] OMAP2: Implement CPUfreq frequency table based on PRCM table

[linux-2.6-omap-h63xx.git] / arch / arm / mach-omap2 / clock24xx.c

diff --git a/arch/arm/mach-omap2/clock24xx.c b/arch/arm/mach-omap2/clock24xx.c
index 421728a7f9032ed829a1c9372baa368461a53fdb..b9902666e4b7ba0bddc4f8d921b898a90693c3e2 100644 (file)
--- a/arch/arm/mach-omap2/clock24xx.c
+++ b/arch/arm/mach-omap2/clock24xx.c
@@ -574,6 +574,45 @@ static int omap2_select_table_rate(struct clk *clk, unsigned long rate)
        return 0;
 }
 
+#ifdef CONFIG_CPU_FREQ
+/*
+ * Walk PRCM rate table and fillout cpufreq freq_table
+ */
+static struct cpufreq_frequency_table freq_table[ARRAY_SIZE(rate_table)];
+
+void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table)
+{
+       struct prcm_config *prcm;
+       int i = 0;
+
+       for (prcm = rate_table; prcm->mpu_speed; prcm++) {
+               if (!(prcm->flags & cpu_mask))
+                       continue;
+               if (prcm->xtal_speed != sys_ck.rate)
+                       continue;
+
+               /* don't put bypass rates in table */
+               if (prcm->dpll_speed == prcm->xtal_speed)
+                       continue;
+
+               freq_table[i].index = i;
+               freq_table[i].frequency = prcm->mpu_speed / 1000;
+               i++;
+       }
+
+       if (i == 0) {
+               printk(KERN_WARNING "%s: failed to initialize frequency "
+                      "table\n", __func__);
+               return;
+       }
+
+       freq_table[i].index = i;
+       freq_table[i].frequency = CPUFREQ_TABLE_END;
+
+       *table = &freq_table[0];
+}
+#endif
+
 static struct clk_functions omap2_clk_functions = {
        .clk_enable             = omap2_clk_enable,
        .clk_disable            = omap2_clk_disable,
@@ -581,6 +620,9 @@ static struct clk_functions omap2_clk_functions = {
        .clk_set_rate           = omap2_clk_set_rate,
        .clk_set_parent         = omap2_clk_set_parent,
        .clk_disable_unused     = omap2_clk_disable_unused,
+#ifdef CONFIG_CPU_FREQ
+       .clk_init_cpufreq_table = omap2_clk_init_cpufreq_table,
+#endif
 };
 
 static u32 omap2_get_apll_clkin(void)