[PATCH v4 0/8] cpufreq: use cpufreq-cpu0 driver for exynos based platforms

Thomas Abraham
2014-05-14T01:11:08Z

Changes since v3:
- Addressed comments from Tomasz Figa <t.figa@samsung.com>
[http://www.spinics.net/lists/cpufreq/msg09290.html]
- Rebased to v3.15-rc4

Changes since v2:
- Safe operating voltage is not required while switching APLL frequency
since the temporary parent's clock is divided down to keep armclk within
permissible limits. Thanks to Heiko St?bner <heiko@sntech.de> for this
suggesting this.
- Rob had suggested to use max frequency for each of the divider clock
outputs instead of divider values. But due to certain SoC specific
characteristics, the divider values corresponding to the input clock
frequency for the CMU_CPU clock blocks have to be used.

Changes since v1:
- Removes Exynos4x12 and Exynos5250 cpufreq driver also.
- Device tree based clock configuration lookup as suggested by Lukasz
Majewski and Tomasz Figa.
- safe operating point binding reworked as suggested by Shawn Guo.

The patch series removes the use of Exynos specific cpufreq driver and enables
the use of cpufreq-cpu0 driver for Exynos4210, Exynos4x12 and Exynos5250 based
platforms. This is being done for few reasons.

(a) The Exynos cpufreq driver reads/writes clock controller registers
bypassing the Exynos CCF driver which is sort of problematic.
(b) Removes the need for having clock controller register definitions
in the cpufreq driver and also removes the need for statically
io-remapping clock controller address space (helps in moving towards
multiplatform kernel).

Thomas Abraham (8):
cpufreq: cpufreq-cpu0: allow use of optional boost mode frequencies
clk: samsung: change scope of samsung clock lock to global
clk: samsung: add infrastructure to register cpu clocks
Documentation: devicetree: add cpu clock configuration data binding for Exynos4/5
clk: exynos: use cpu-clock provider type to represent arm clock
ARM: dts: Exynos: add cpu nodes, opp and cpu clock configuration data
ARM: Exynos: switch to using generic cpufreq-cpu0 driver
cpufreq: exynos: remove all exynos specific cpufreq driver support

.../devicetree/bindings/clock/exynos4-clock.txt | 37 ++
.../devicetree/bindings/clock/exynos5250-clock.txt | 36 ++
.../devicetree/bindings/cpufreq/cpufreq-cpu0.txt | 2 +
arch/arm/boot/dts/exynos4210-origen.dts | 6 +
arch/arm/boot/dts/exynos4210-trats.dts | 6 +
arch/arm/boot/dts/exynos4210-universal_c210.dts | 6 +
arch/arm/boot/dts/exynos4210.dtsi | 35 ++
arch/arm/boot/dts/exynos4212.dtsi | 18 +
arch/arm/boot/dts/exynos4412-odroidx.dts | 6 +
arch/arm/boot/dts/exynos4412-origen.dts | 6 +
arch/arm/boot/dts/exynos4412-trats2.dts | 6 +
arch/arm/boot/dts/exynos4412.dtsi | 31 ++
arch/arm/boot/dts/exynos4x12.dtsi | 36 ++
arch/arm/boot/dts/exynos5250-arndale.dts | 6 +
arch/arm/boot/dts/exynos5250-cros-common.dtsi | 6 +
arch/arm/boot/dts/exynos5250-smdk5250.dts | 6 +
arch/arm/boot/dts/exynos5250.dtsi | 41 ++
arch/arm/mach-exynos/exynos.c | 4 +-
drivers/clk/samsung/Makefile | 2 +-
drivers/clk/samsung/clk-cpu.c | 458 ++++++++++++++++++++
drivers/clk/samsung/clk-exynos4.c | 25 +-
drivers/clk/samsung/clk-exynos5250.c | 12 +-
drivers/clk/samsung/clk.c | 13 +-
drivers/clk/samsung/clk.h | 7 +
drivers/cpufreq/Kconfig | 11 +
drivers/cpufreq/Kconfig.arm | 52 ---
drivers/cpufreq/Makefile | 4 -
drivers/cpufreq/cpufreq-cpu0.c | 5 +
drivers/cpufreq/exynos-cpufreq.c | 209 ---------
drivers/cpufreq/exynos-cpufreq.h | 91 ----
drivers/cpufreq/exynos4210-cpufreq.c | 157 -------
drivers/cpufreq/exynos4x12-cpufreq.c | 211 ---------
drivers/cpufreq/exynos5250-cpufreq.c | 183 --------
include/dt-bindings/clock/exynos5250.h | 1 +
34 files changed, 799 insertions(+), 936 deletions(-)
create mode 100644 drivers/clk/samsung/clk-cpu.c
delete mode 100644 drivers/cpufreq/exynos-cpufreq.c
delete mode 100644 drivers/cpufreq/exynos-cpufreq.h
delete mode 100644 drivers/cpufreq/exynos4210-cpufreq.c
delete mode 100644 drivers/cpufreq/exynos4x12-cpufreq.c
delete mode 100644 drivers/cpufreq/exynos5250-cpufreq.c

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1.7.4.4