diff options
| -rw-r--r-- | arch/arm/boot/dts/tango4-smp8758.dtsi | 1 | ||||
| -rw-r--r-- | drivers/cpufreq/Kconfig.arm | 5 | ||||
| -rw-r--r-- | drivers/cpufreq/Makefile | 1 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq-dt-platdev.c | 2 | ||||
| -rw-r--r-- | drivers/cpufreq/tango-cpufreq.c | 38 |
5 files changed, 44 insertions, 3 deletions
diff --git a/arch/arm/boot/dts/tango4-smp8758.dtsi b/arch/arm/boot/dts/tango4-smp8758.dtsi index d2e65c46bcc7..eca33d568690 100644 --- a/arch/arm/boot/dts/tango4-smp8758.dtsi +++ b/arch/arm/boot/dts/tango4-smp8758.dtsi @@ -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 { diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 49ec1c0c395a..4c277d11831b 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -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 diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 51221b1e1f15..227922b0d42c 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -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 diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 2eb40d46d357..096aea7fcb67 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -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", }, diff --git a/drivers/cpufreq/tango-cpufreq.c b/drivers/cpufreq/tango-cpufreq.c new file mode 100644 index 000000000000..89a7f860bfe8 --- /dev/null +++ b/drivers/cpufreq/tango-cpufreq.c @@ -0,0 +1,38 @@ +#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); |