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authorNicolas Saenz Julienne <nsaenzjulienne@suse.de>2019-06-12 21:24:56 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2019-06-13 06:28:22 +0300
commitd3df18a97e586702920337056540267807b23f8e (patch)
tree0a431d6334bd5f5f70656f4241aaf7bc3419cb11 /drivers/cpufreq/Makefile
parente6abacabb5acb6315e0e9560b2cb50a4d55b6e09 (diff)
downloadlinux-d3df18a97e586702920337056540267807b23f8e.tar.xz
cpufreq: add driver for Raspberry Pi
Raspberry Pi's firmware offers and interface though which update it's performance requirements. It allows us to request for specific runtime frequencies, which the firmware might or might not respect, depending on the firmware configuration and thermals. As the maximum and minimum frequencies are configurable in the firmware there is no way to know in advance their values. So the Raspberry Pi cpufreq driver queries them, builds an opp frequency table to then launch cpufreq-dt. Also, as the firmware interface might be configured as a module, making the cpu clock unavailable during init, this implements a full fledged driver, as opposed to most drivers registering cpufreq-dt, which only make use of an init routine. Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Acked-by: Eric Anholt <eric@anholt.net> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Acked-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/Makefile')
-rw-r--r--drivers/cpufreq/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 7bcda2273d0c..5a6c70d26c98 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW) += qcom-cpufreq-hw.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO) += qcom-cpufreq-kryo.o
+obj-$(CONFIG_ARM_RASPBERRYPI_CPUFREQ) += raspberrypi-cpufreq.o
obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o
obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o