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Commit cd325295 authored by Soren Brinkmann's avatar Soren Brinkmann Committed by Daniel Lezcano
Browse files

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@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: devicetree@vger.kernel.org
Signed-off-by: default avatarSoren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: default avatarMichal Simek <michal.simek@xilinx.com>
parent 61f1fc7e

arch/arm/boot/dts/zynq-7000.dtsi

+6 −0
Original line number Diff line number Diff line
@@ -24,6 +24,12 @@ 
			device_type = "cpu";

			reg = <0>;

			clocks = <&clkc 3>;

			operating-points = <

				/* kHz    uV */

				666667  1000000

				333334  1000000

				222223  1000000

			>;

		};



		cpu@1 {

arch/arm/mach-zynq/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-zynq/common.c

+3 −0
Original line number Diff line number Diff line
@@ -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)