raspberrypi-cpufreq: Only report integer pll divisor frequencies

diff --git a/drivers/cpufreq/raspberrypi-cpufreq.c b/drivers/cpufreq/raspberrypi-cpufreq.c
index 2bc7d97..8bcfab2 100644 (file)
--- a/drivers/cpufreq/raspberrypi-cpufreq.c
+++ b/drivers/cpufreq/raspberrypi-cpufreq.c
@@ -8,6 +8,7 @@
 #include <linux/clk.h>
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
+#include <linux/math64.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_opp.h>
@@ -22,6 +23,7 @@ static int raspberrypi_cpufreq_probe(struct platform_device *pdev)
        unsigned long min, max;
        unsigned long rate;
        struct clk *clk;
+       int div;
        int ret;
 
        cpu_dev = get_cpu_device(0);
@@ -44,7 +46,10 @@ static int raspberrypi_cpufreq_probe(struct platform_device *pdev)
        max = roundup(clk_round_rate(clk, ULONG_MAX), RASPBERRYPI_FREQ_INTERVAL);
        clk_put(clk);
 
-       for (rate = min; rate <= max; rate += RASPBERRYPI_FREQ_INTERVAL) {
+       for (div = 2; ; div++) {
+               rate = div_u64((u64)max * 2, div);
+               if (rate < min)
+                       break;
                ret = dev_pm_opp_add(cpu_dev, rate, 0);
                if (ret)
                        goto remove_opp;