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Date: Mon, 3 Feb 2014 14:34:37 -0800 From: Soren Brinkmann <soren.brinkmann@...inx.com> To: Thomas Gleixner <tglx@...utronix.de>, Daniel Lezcano <daniel.lezcano@...aro.org>, Michal Simek <michal.simek@...inx.com> Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Sören Brinkmann <soren.brinkmann@...inx.com>, Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>, Mark Rutland <mark.rutland@....com>, Ian Campbell <ijc+devicetree@...lion.org.uk>, Kumar Gala <galak@...eaurora.org>, Russell King <linux@....linux.org.uk>, devicetree@...r.kernel.org Subject: [PATCH v3 7/7] arm: zynq: Add support for cpufreq 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. Cc: Rob Herring <robh+dt@...nel.org> Cc: Pawel Moll <pawel.moll@....com> Cc: Mark Rutland <mark.rutland@....com> Cc: Ian Campbell <ijc+devicetree@...lion.org.uk> Cc: Kumar Gala <galak@...eaurora.org> Cc: Russell King <linux@....linux.org.uk> Cc: devicetree@...r.kernel.org Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com> --- v3: - change lowest frequency to 222223 (F_max / 3) --- 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 8b67b19392ec..789d0bacc110 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 + 222223 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 1db2a5ca9ab8..644468151c04 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -51,6 +51,8 @@ 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 */ @@ -59,6 +61,7 @@ static void __init zynq_init_machine(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); platform_device_register(&zynq_cpuidle_device); + platform_device_register_full(&devinfo); } static void __init zynq_timer_init(void) -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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