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41 lines
1.2 KiB
Diff
41 lines
1.2 KiB
Diff
From 1c038a58f4183602fc1699d68b21f5e22a12176d Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Fri, 13 Sep 2019 13:45:11 +0100
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Subject: [PATCH] raspberrypi-cpufreq: Only report integer pll divisor
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frequencies
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---
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drivers/cpufreq/raspberrypi-cpufreq.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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--- a/drivers/cpufreq/raspberrypi-cpufreq.c
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+++ b/drivers/cpufreq/raspberrypi-cpufreq.c
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@@ -8,6 +8,7 @@
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#include <linux/clk.h>
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#include <linux/cpu.h>
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#include <linux/cpufreq.h>
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+#include <linux/math64.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_opp.h>
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@@ -22,6 +23,7 @@ static int raspberrypi_cpufreq_probe(str
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unsigned long min, max;
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unsigned long rate;
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struct clk *clk;
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+ int div;
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int ret;
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cpu_dev = get_cpu_device(0);
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@@ -44,7 +46,10 @@ static int raspberrypi_cpufreq_probe(str
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max = roundup(clk_round_rate(clk, ULONG_MAX), RASPBERRYPI_FREQ_INTERVAL);
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clk_put(clk);
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- for (rate = min; rate <= max; rate += RASPBERRYPI_FREQ_INTERVAL) {
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+ for (div = 2; ; div++) {
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+ rate = div_u64((u64)max * 2, div);
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+ if (rate < min)
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+ break;
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ret = dev_pm_opp_add(cpu_dev, rate, 0);
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if (ret)
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goto remove_opp;
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