The generic cpufreq-cpu0 driver can scale the CPU frequency on Zynq SOCs. Add the required platform device to the BSP and appropriate OPPs to the dts. Signed-off-by: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx> --- arch/arm/boot/dts/zynq-7000.dtsi | 6 ++++++ arch/arm/mach-zynq/Kconfig | 2 ++ arch/arm/mach-zynq/common.c | 3 +++ 3 files changed, 11 insertions(+) diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi index 23ba82c205a2..dc030481ee64 100644 --- a/arch/arm/boot/dts/zynq-7000.dtsi +++ b/arch/arm/boot/dts/zynq-7000.dtsi @@ -24,6 +24,12 @@ device_type = "cpu"; reg = <0>; clocks = <&clkc 3>; + operating-points = < + /* kHz uV */ + 666667 1000000 + 333334 1000000 + 111112 1000000 + >; }; cpu@1 { diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig index f84fab14f0b7..f03e75bd0b2b 100644 --- a/arch/arm/mach-zynq/Kconfig +++ b/arch/arm/mach-zynq/Kconfig @@ -2,6 +2,8 @@ config ARCH_ZYNQ bool "Xilinx Zynq ARM Cortex A9 Platform" if ARCH_MULTI_V7 select ARM_AMBA select ARM_GIC + select ARCH_HAS_CPUFREQ + select ARCH_HAS_OPP select COMMON_CLK select CPU_V7 select GENERIC_CLOCKEVENTS diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index 9a7bd137c8fd..eeff33a1d14a 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -54,6 +54,8 @@ static struct platform_device zynq_cpuidle_device = { */ static void __init zynq_init_machine(void) { + struct platform_device_info devinfo = { .name = "cpufreq-cpu0", }; + /* * 64KB way size, 8-way associativity, parity disabled */ @@ -62,6 +64,7 @@ static void __init zynq_init_machine(void) of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL); platform_device_register(&zynq_cpuidle_device); + platform_device_register_full(&devinfo); } static void __init zynq_timer_init(void) -- 1.8.4.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html