From: popcornmix <popcornmix@gmail.com>
Date: Fri, 13 Sep 2019 12:45:11 +0000 (+0100)
Subject: raspberrypi-cpufreq: Only report integer pll divisor frequencies
X-Git-Tag: submit/tizen/20200402.094258~390
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=46352d693e956acf542f74dda5ccd04885c4b3cd;p=platform%2Fkernel%2Flinux-rpi.git

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
--- 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;