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authorSoren Brinkmann <soren.brinkmann@xilinx.com>2014-02-19 15:14:44 -0800
committerDaniel Lezcano <daniel.lezcano@linaro.org>2014-03-11 23:10:28 +0100
commitcd325295871fbd172340a73f323f6a19c0b0525d (patch)
tree3bd7a66de2372abb25079a37d329ca2338f9f50d /arch/arm/mach-zynq
parent61f1fc7e9258a169ac8afb5ddf657a181e60d052 (diff)
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: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/arm/mach-zynq')
-rw-r--r--arch/arm/mach-zynq/Kconfig2
-rw-r--r--arch/arm/mach-zynq/common.c3
2 files changed, 5 insertions, 0 deletions
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)