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From 814af1a008845b61a08111f2f9cf7e66511ab362 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Fri, 13 Sep 2019 13:45:11 +0100
Subject: [PATCH] raspberrypi-cpufreq: Only report integer pll divisor
frequencies
---
drivers/cpufreq/raspberrypi-cpufreq.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- 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(str
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(str
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;
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