Add basic imx6q cpuidle driver. For now, only basic WFI state is supported. Deeper idle states will be added in the future.
Signed-off-by: Robert Lee <rob....@linaro.org> --- arch/arm/mach-imx/cpuidle-imx6q.c | 33 +++++++++++++++++++++++++++++++++ arch/arm/mach-imx/mach-imx6q.c | 18 ++++++++++++++++++ 2 files changed, 51 insertions(+) create mode 100644 arch/arm/mach-imx/cpuidle-imx6q.c diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c new file mode 100644 index 0000000..b74557f --- /dev/null +++ b/arch/arm/mach-imx/cpuidle-imx6q.c @@ -0,0 +1,33 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * Copyright 2012 Linaro Ltd. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/cpuidle.h> +#include <linux/export.h> +#include <asm/cpuidle.h> +#include <mach/cpuidle.h> + +static struct cpuidle_driver imx6q_cpuidle_driver = { + .name = "imx6q_cpuidle", + .owner = THIS_MODULE, + .en_core_tk_irqen = 1, + .states[0] = ARM_CPUIDLE_WFI_STATE, + .state_count = 1, +}; + +int __init imx6q_cpuidle_init(void) +{ + imx_cpuidle_set_driver(&imx6q_cpuidle_driver); + + return 0; +} diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index da6c1d9..21e2051 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -21,6 +21,9 @@ #include <linux/of_platform.h> #include <linux/phy.h> #include <linux/micrel_phy.h> +#include <linux/export.h> +#include <linux/cpuidle.h> +#include <asm/cpuidle.h> #include <asm/smp_twd.h> #include <asm/hardware/cache-l2x0.h> #include <asm/hardware/gic.h> @@ -29,6 +32,7 @@ #include <asm/system_misc.h> #include <mach/common.h> #include <mach/hardware.h> +#include <mach/cpuidle.h> void imx6q_restart(char mode, const char *cmd) { @@ -86,6 +90,19 @@ static void __init imx6q_init_machine(void) imx6q_pm_init(); } +static struct cpuidle_driver imx6q_cpuidle_driver = { + .name = "imx6q_cpuidle", + .owner = THIS_MODULE, + .en_core_tk_irqen = 1, + .states[0] = ARM_CPUIDLE_WFI_STATE, + .state_count = 1, +}; + +static void __init imx6q_init_late(void) +{ + imx_cpuidle_init(&imx6q_cpuidle_driver); +} + static void __init imx6q_map_io(void) { imx_lluart_map_io(); @@ -142,6 +159,7 @@ DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)") .handle_irq = imx6q_handle_irq, .timer = &imx6q_timer, .init_machine = imx6q_init_machine, + .init_late = imx6q_init_late, .dt_compat = imx6q_dt_compat, .restart = imx6q_restart, MACHINE_END -- 1.7.10 _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
