diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0218-cpufreq-Temporarily-ignore-io_is_busy-1.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0218-cpufreq-Temporarily-ignore-io_is_busy-1.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0218-cpufreq-Temporarily-ignore-io_is_busy-1.patch b/target/linux/brcm2708/patches-4.4/0218-cpufreq-Temporarily-ignore-io_is_busy-1.patch new file mode 100644 index 0000000000..7f809afda0 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0218-cpufreq-Temporarily-ignore-io_is_busy-1.patch @@ -0,0 +1,31 @@ +From 65d0fed05912509d60d94fdba8debe1a095c73a6 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Wed, 30 Mar 2016 17:23:15 +0100 +Subject: [PATCH 218/304] cpufreq: Temporarily ignore io_is_busy=1 + +To speed testing of the new sdhost driver that adapts to changes in +core_freq, hack the on-demand governor to treat io_is_busy=1 as +io_is_busy=0. The io_is_busy feature can still be forced using +io_is_busy=2. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/cpufreq/cpufreq_ondemand.c | 7 ++++++- + 1 file changed, 6 insertions(+), 1 deletion(-) + +--- a/drivers/cpufreq/cpufreq_ondemand.c ++++ b/drivers/cpufreq/cpufreq_ondemand.c +@@ -307,7 +307,12 @@ static ssize_t store_io_is_busy(struct d + ret = sscanf(buf, "%u", &input); + if (ret != 1) + return -EINVAL; +- od_tuners->io_is_busy = !!input; ++ // XXX temporary hack ++ if (input > 1) ++ input = 1; ++ else ++ input = 0; ++ od_tuners->io_is_busy = input; + + /* we need to re-evaluate prev_cpu_idle */ + for_each_online_cpu(j) { |