cpufreq: exynos: Add cpufreq driver for exynos5440
authorAmit Daniel Kachhap <amit.daniel@samsung.com>
Mon, 8 Apr 2013 09:57:34 +0000 (09:57 +0000)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 10 Apr 2013 11:19:26 +0000 (13:19 +0200)
commit49d7b5bfb79cd5f8141a2998e2f4003d0ed65e5c
tree73d90435e6f32db332c0ca3ba034d475ee498daa
parent9c5320c8ea8b8423edca2c40cd559f1ce9496dab
cpufreq: exynos: Add cpufreq driver for exynos5440

This patch adds dvfs support for exynos5440 SOC. This soc has 4 cores and
they scale at same frequency. The nature of exynos5440 clock controller is
different from previous exynos controllers so not using the common exynos
cpufreq framework. The major difference being interrupt notification for
frequency change. Also, OPP library is used for device tree parsing to get
different parameters like frequency, voltage etc. Since the opp library sorts
the frequency table in ascending order so they are again re-arranged in
descending order. This will have one-to-one mapping with the clock controller
state management logic.

Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Documentation/devicetree/bindings/cpufreq/cpufreq-exynos5440.txt [new file with mode: 0644]
drivers/cpufreq/Kconfig.arm
drivers/cpufreq/Makefile
drivers/cpufreq/exynos5440-cpufreq.c [new file with mode: 0644]