target/linux/bcm27xx/patches-5.4/950-0353-raspberrypi-cpufreq-Only-report-integer-pll-divisor-.patch

   1 From 814af1a008845b61a08111f2f9cf7e66511ab362 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Fri, 13 Sep 2019 13:45:11 +0100
   4 Subject: [PATCH] raspberrypi-cpufreq: Only report integer pll divisor
   5  frequencies
   6
   7 ---
   8  drivers/cpufreq/raspberrypi-cpufreq.c | 7 ++++++-
   9  1 file changed, 6 insertions(+), 1 deletion(-)
  10
  11 --- a/drivers/cpufreq/raspberrypi-cpufreq.c
  12 +++ b/drivers/cpufreq/raspberrypi-cpufreq.c
  13 @@ -8,6 +8,7 @@
  14  #include <linux/clk.h>
  15  #include <linux/cpu.h>
  16  #include <linux/cpufreq.h>
  17 +#include <linux/math64.h>
  18  #include <linux/module.h>
  19  #include <linux/platform_device.h>
  20  #include <linux/pm_opp.h>
  21 @@ -22,6 +23,7 @@ static int raspberrypi_cpufreq_probe(str
  22         unsigned long min, max;
  23         unsigned long rate;
  24         struct clk *clk;
  25 +       int div;
  26         int ret;
  27
  28         cpu_dev = get_cpu_device(0);
  29 @@ -44,7 +46,10 @@ static int raspberrypi_cpufreq_probe(str
  30         max = roundup(clk_round_rate(clk, ULONG_MAX), RASPBERRYPI_FREQ_INTERVAL);
  31         clk_put(clk);
  32
  33 -       for (rate = min; rate <= max; rate += RASPBERRYPI_FREQ_INTERVAL) {
  34 +       for (div = 2; ; div++) {
  35 +               rate = div_u64((u64)max * 2, div);
  36 +               if (rate < min)
  37 +                       break;
  38                 ret = dev_pm_opp_add(cpu_dev, rate, 0);
  39                 if (ret)
  40                         goto remove_opp;