| Message ID | 1458647848-48999-1-git-send-email-xf@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, Am Dienstag, 22. März 2016, 19:57:28 schrieb Feng Xiao: > This driver will directly use cpufreq-dt driver as backend. > > As there is not a generic devicetree board file(rockchip.c) > on ARM64 architecture, so remove platform_device_register_simple > in rockchip.c and add a new cpufreq driver to support Rockchip > SoCs. > > Signed-off-by: Feng Xiao <xf@rock-chips.com> some hints regarding the soc-selection below, otherwise this looks nice. Reviewed-by: Heiko Stuebner <heiko@sntech.de> [includes an Ack for the mach-rockchip change ;-) ] [...] > diff --git a/drivers/cpufreq/rockchip-cpufreq.c > b/drivers/cpufreq/rockchip-cpufreq.c new file mode 100644 > index 0000000..65c1de9 > --- /dev/null > +++ b/drivers/cpufreq/rockchip-cpufreq.c > @@ -0,0 +1,55 @@ > +/* > + * Rockchip Platforms CPUFreq Support > + * > + * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd > + * > + * Feng Xiao <xf@rock-chips.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed "as is" WITHOUT ANY WARRANTY of any > + * kind, whether express or implied; without even the implied warranty > + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/err.h> > +#include <linux/init.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > + > +static const char * const rockchip_compat[] = { > + "rockchip,rk2928", + "rockchip,rk3036", > + "rockchip,rk3066a", > + "rockchip,rk3066b", > + "rockchip,rk3188", + "rockchip,rk3228", > + "rockchip,rk3288", > + "rockchip,rk3366", > + "rockchip,rk3368", > + "rockchip,rk3399", > +}; > + > +static int __init rockchip_cpufreq_driver_init(void) > +{ > + struct platform_device *pdev; > + int i; > + > + for (i = 0; i < ARRAY_SIZE(rockchip_compat); i++) { > + if (of_machine_is_compatible(rockchip_compat[i])) { > + pdev = platform_device_register_simple("cpufreq-dt", > + -1, NULL, 0); > + return PTR_ERR_OR_ZERO(pdev); > + } > + } > + > + return -ENODEV; > +} > +module_init(rockchip_cpufreq_driver_init); > + > +MODULE_AUTHOR("Feng Xiao <xf@rock-chips.com>"); > +MODULE_DESCRIPTION("Rockchip cpufreq driver"); > +MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/mach-rockchip/rockchip.c b/arch/arm/mach-rockchip/rockchip.c index 3f07cc5..beb71da 100644 --- a/arch/arm/mach-rockchip/rockchip.c +++ b/arch/arm/mach-rockchip/rockchip.c @@ -74,7 +74,6 @@ static void __init rockchip_dt_init(void) { rockchip_suspend_init(); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); - platform_device_register_simple("cpufreq-dt", 0, NULL, 0); } static const char * const rockchip_board_dt_compat[] = { diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 14b1f93..1786315 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -97,6 +97,16 @@ config ARM_OMAP2PLUS_CPUFREQ depends on ARCH_OMAP2PLUS default ARCH_OMAP2PLUS +config ARM_ROCKCHIP_CPUFREQ + tristate "Rockchip CPUfreq driver" + depends on ARCH_ROCKCHIP && CPUFREQ_DT + select PM_OPP + help + This adds the CPUFreq driver support for Rockchip SoCs. + The driver will directly use cpufreq-dt driver as backend. + + If in doubt, say N. + config ARM_S3C_CPUFREQ bool help diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 9e63fb1..91d8bb7 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_ARM_MT8173_CPUFREQ) += mt8173-cpufreq.o obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o +obj-$(CONFIG_ARM_ROCKCHIP_CPUFREQ) += rockchip-cpufreq.o obj-$(CONFIG_ARM_S3C24XX_CPUFREQ) += s3c24xx-cpufreq.o obj-$(CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS) += s3c24xx-cpufreq-debugfs.o obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o diff --git a/drivers/cpufreq/rockchip-cpufreq.c b/drivers/cpufreq/rockchip-cpufreq.c new file mode 100644 index 0000000..65c1de9 --- /dev/null +++ b/drivers/cpufreq/rockchip-cpufreq.c @@ -0,0 +1,55 @@ +/* + * Rockchip Platforms CPUFreq Support + * + * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd + * + * Feng Xiao <xf@rock-chips.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +static const char * const rockchip_compat[] = { + "rockchip,rk2928", + "rockchip,rk3066a", + "rockchip,rk3066b", + "rockchip,rk3188", + "rockchip,rk3288", + "rockchip,rk3366", + "rockchip,rk3368", + "rockchip,rk3399", +}; + +static int __init rockchip_cpufreq_driver_init(void) +{ + struct platform_device *pdev; + int i; + + for (i = 0; i < ARRAY_SIZE(rockchip_compat); i++) { + if (of_machine_is_compatible(rockchip_compat[i])) { + pdev = platform_device_register_simple("cpufreq-dt", + -1, NULL, 0); + return PTR_ERR_OR_ZERO(pdev); + } + } + + return -ENODEV; +} +module_init(rockchip_cpufreq_driver_init); + +MODULE_AUTHOR("Feng Xiao <xf@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip cpufreq driver"); +MODULE_LICENSE("GPL v2");
This driver will directly use cpufreq-dt driver as backend. As there is not a generic devicetree board file(rockchip.c) on ARM64 architecture, so remove platform_device_register_simple in rockchip.c and add a new cpufreq driver to support Rockchip SoCs. Signed-off-by: Feng Xiao <xf@rock-chips.com> --- change in v1: - add compatible check arch/arm/mach-rockchip/rockchip.c | 1 - drivers/cpufreq/Kconfig.arm | 10 +++++++ drivers/cpufreq/Makefile | 1 + drivers/cpufreq/rockchip-cpufreq.c | 55 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 66 insertions(+), 1 deletion(-) create mode 100644 drivers/cpufreq/rockchip-cpufreq.c