提交 9dbd224f 编写于 作者: M Marc Gonzalez 提交者: Rafael J. Wysocki

cpufreq: dt: Don't use generic platdev driver for tango

On tango platforms, firmware configures the CPU clock, and Linux is
then only allowed to use the cpu_clk_divider to change the frequency.
Build the OPP table dynamically at init, in order to support whatever
firmware throws at us.
Signed-off-by: NMarc Gonzalez <marc_gonzalez@sigmadesigns.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
上级 bb33270c
......@@ -13,7 +13,6 @@
reg = <0>;
clocks = <&clkgen CPU_CLK>;
clock-latency = <1>;
operating-points = <1215000 0 607500 0 405000 0 243000 0 135000 0>;
};
cpu1: cpu@1 {
......
......@@ -241,6 +241,11 @@ config ARM_STI_CPUFREQ
this config option if you wish to add CPUFreq support for STi based
SoCs.
config ARM_TANGO_CPUFREQ
bool
depends on CPUFREQ_DT && ARCH_TANGO
default y
config ARM_TEGRA20_CPUFREQ
bool "Tegra20 CPUFreq support"
depends on ARCH_TEGRA
......
......@@ -75,6 +75,7 @@ obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o
obj-$(CONFIG_ARM_SCPI_CPUFREQ) += scpi-cpufreq.o
obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o
obj-$(CONFIG_ARM_STI_CPUFREQ) += sti-cpufreq.o
obj-$(CONFIG_ARM_TANGO_CPUFREQ) += tango-cpufreq.o
obj-$(CONFIG_ARM_TEGRA20_CPUFREQ) += tegra20-cpufreq.o
obj-$(CONFIG_ARM_TEGRA124_CPUFREQ) += tegra124-cpufreq.o
obj-$(CONFIG_ARM_TEGRA186_CPUFREQ) += tegra186-cpufreq.o
......
......@@ -80,8 +80,6 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "rockchip,rk3368", },
{ .compatible = "rockchip,rk3399", },
{ .compatible = "sigma,tango4" },
{ .compatible = "socionext,uniphier-pro5", },
{ .compatible = "socionext,uniphier-pxs2", },
{ .compatible = "socionext,uniphier-ld6b", },
......
#include <linux/of.h>
#include <linux/cpu.h>
#include <linux/clk.h>
#include <linux/pm_opp.h>
#include <linux/platform_device.h>
static const struct of_device_id machines[] __initconst = {
{ .compatible = "sigma,tango4" },
{ /* sentinel */ }
};
static int __init tango_cpufreq_init(void)
{
struct device *cpu_dev = get_cpu_device(0);
unsigned long max_freq;
struct clk *cpu_clk;
void *res;
if (!of_match_node(machines, of_root))
return -ENODEV;
cpu_clk = clk_get(cpu_dev, NULL);
if (IS_ERR(cpu_clk))
return -ENODEV;
max_freq = clk_get_rate(cpu_clk);
dev_pm_opp_add(cpu_dev, max_freq / 1, 0);
dev_pm_opp_add(cpu_dev, max_freq / 2, 0);
dev_pm_opp_add(cpu_dev, max_freq / 3, 0);
dev_pm_opp_add(cpu_dev, max_freq / 5, 0);
dev_pm_opp_add(cpu_dev, max_freq / 9, 0);
res = platform_device_register_data(NULL, "cpufreq-dt", -1, NULL, 0);
return PTR_ERR_OR_ZERO(res);
}
device_initcall(tango_cpufreq_init);
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