This patch-set adds the generic exynos bus frequency driver for memory bus with DEVFREQ framework. The Samsung Exynos SoCs have the common architecture for memory bus between DRAM memory and MMC/sub IP in SoC. This driver can support the memory bus frequency driver for Exynos SoCs. Each memory bus block has a clock for memory bus speed and frequency table which is changed according to the utilization of memory bus on runtime. And then each memory bus group has the one more memory bus blocks and OPP table (including frequency and voltage), regulator, devfreq-event devices. There are a little difference about the number of memory bus because each Exynos SoC have the different sub-IP and different memory bus speed. In spite of this difference among Exynos SoCs, we can support almost Exynos SoC by adding unique data of memory bus to devicetree file. Depend on: - v3.19-rc3 - [PATCHv7 00/10] devfreq: Add devfreq-event class to provide raw data for devfreq device : https://lkml.org/lkml/2015/1/7/795 Changelog: Changes from v2: (https://lkml.org/lkml/2014/12/31/2) - Support the memory bus frequency feature for Exynos3250-based Monk board - Fix build warning about variable uninitialized Changes from v1: (https://lkml.org/lkml/2014/12/23/178) - This patchset is rebased on v3.19-rc2. - Fix bug after wake-up from suspend state. If devfreq device fail to get event, exynos-busfreq retry to set the event for starting. - Add memory bus group of Exynos4x12/Exynos4210 - Add divider clock id for Exynos4 memory bus frequency - Support memory bus frequency driver on Exynos4412-based TRATS2 board - This patch-set has the dependency on following patch-set[1]: [1] [PATCHv6 0/9] devfreq: Add devfreq-event class to provide raw data for devfreq device : https://lkml.org/lkml/2014/12/28/139 Chanwoo Choi (8): devfreq: exynos: Add generic exynos memory bus frequency driver devfreq: exynos: Add documentation for generic exynos memory bus frequency driver ARM: dts: Add memory bus node for Exynos3250 clk: samsung: exynos4: Add divider clock id for memory bus frequency ARM: dts: Add memory bus node for Exynos4x12 ARM: dts: Add memory bus node for Exynos4210 ARM: dts: Add memory bus node for Exynos3250-based Rinato/Monk board ARM: dts: Add memory bus node for Exynos4412-based TRATS2 board .../devicetree/bindings/devfreq/exynos-busfreq.txt | 184 +++++++ arch/arm/boot/dts/exynos3250-monk.dts | 12 + arch/arm/boot/dts/exynos3250-rinato.dts | 12 + arch/arm/boot/dts/exynos3250.dtsi | 125 +++++ arch/arm/boot/dts/exynos4210.dtsi | 93 ++++ arch/arm/boot/dts/exynos4412-trats2.dts | 12 + arch/arm/boot/dts/exynos4x12.dtsi | 121 +++++ drivers/clk/samsung/clk-exynos4.c | 10 +- drivers/devfreq/Kconfig | 15 + drivers/devfreq/Makefile | 1 + drivers/devfreq/exynos-busfreq.c | 589 +++++++++++++++++++++ include/dt-bindings/clock/exynos4.h | 7 +- 12 files changed, 1175 insertions(+), 6 deletions(-) create mode 100644 Documentation/devicetree/bindings/devfreq/exynos-busfreq.txt create mode 100644 drivers/devfreq/exynos-busfreq.c -- 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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