diff options
Diffstat (limited to 'arch/arm/mach-mx5')
| -rw-r--r-- | arch/arm/mach-mx5/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-mx5/cpuidle.c | 82 | ||||
| -rw-r--r-- | arch/arm/mach-mx5/cpuidle.h | 13 | ||||
| -rw-r--r-- | arch/arm/mach-mx5/mm.c | 4 |
4 files changed, 100 insertions, 2 deletions
diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile index 383e7cd3fbc..4471ce76e39 100644 --- a/arch/arm/mach-mx5/Makefile +++ b/arch/arm/mach-mx5/Makefile @@ -3,9 +3,8 @@ # # Object file lists. -obj-y := cpu.o mm.o clock-mx51-mx53.o devices.o ehci.o system.o +obj-y := cpu.o mm.o clock-mx51-mx53.o devices.o ehci.o system.o cpuidle.o obj-$(CONFIG_SOC_IMX50) += mm-mx50.o - obj-$(CONFIG_PM) += pm-imx5.o obj-$(CONFIG_CPU_FREQ_IMX) += cpu_op-mx51.o obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o diff --git a/arch/arm/mach-mx5/cpuidle.c b/arch/arm/mach-mx5/cpuidle.c new file mode 100644 index 00000000000..fa3ea6a66f8 --- /dev/null +++ b/arch/arm/mach-mx5/cpuidle.c @@ -0,0 +1,82 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * Copyright 2011 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/types.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <asm/proc-fns.h> +#include <mach/cpuidle.h> +#include <mach/system.h> + +static int mx5_cpuidle_init(void *init_data); +static int mx5_cpuidle(struct cpuidle_device *dev, struct cpuidle_state *state); + +static struct imx_cpuidle_state_data mx5_cpuidle_state_data[] __initdata = { + { + .name = "powered_noclock", + .desc = "idle cpu powered, unclocked.", + .exit_latency = 12, + .mach_cpu_pwr_state = WAIT_UNCLOCKED, + }, { + .name = "nopower_noclock", + .desc = "idle cpu unpowered, unclocked.", + .exit_latency = 20, + .mach_cpu_pwr_state = WAIT_UNCLOCKED_POWER_OFF, + } +}; + +static struct cpuidle_driver mx5_cpuidle_driver = { + .name = "imx5_cpuidle", + .owner = THIS_MODULE, +}; + +struct imx_cpuidle_data mx5_cpuidle_data __initdata = { + .imx_cpuidle_driver = &mx5_cpuidle_driver, + .state_data = mx5_cpuidle_state_data, + .mach_cpuidle = mx5_cpuidle, + .mach_cpuidle_init = mx5_cpuidle_init, + .num_states = ARRAY_SIZE(mx5_cpuidle_state_data), +}; + +int mx5_cpuidle(struct cpuidle_device *dev, struct cpuidle_state *state) +{ + mx5_cpu_lp_set((enum mxc_cpu_pwr_mode)state->driver_data); + + cpu_do_idle(); + + return 0; +} + +int __init mx5_cpuidle_init(void * init_data) +{ + int ret; + struct clk *gpc_dvfs_clk; + + gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs"); + + if (IS_ERR(gpc_dvfs_clk)) { + pr_err("%s: Failed to get gpc_dvfs clock\n", __func__); + return (int)gpc_dvfs_clk; + } + + ret = clk_enable(gpc_dvfs_clk); + + if (IS_ERR(&ret)) { + pr_err("%s: Failed to enable gpc_dvfs clock\n", __func__); + return ret; + } + + return 0; +} diff --git a/arch/arm/mach-mx5/cpuidle.h b/arch/arm/mach-mx5/cpuidle.h new file mode 100644 index 00000000000..270ffa651d6 --- /dev/null +++ b/arch/arm/mach-mx5/cpuidle.h @@ -0,0 +1,13 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * Copyright 2011 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 + */ + +extern struct imx_cpuidle_data mx5_cpuidle_data; diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c index baea6e5cddd..29bb785a398 100644 --- a/arch/arm/mach-mx5/mm.c +++ b/arch/arm/mach-mx5/mm.c @@ -20,6 +20,8 @@ #include <mach/common.h> #include <mach/devices-common.h> #include <mach/iomux-v3.h> +#include <mach/cpuidle.h> +#include "cpuidle.h" /* * Define the MX51 memory map. @@ -148,6 +150,8 @@ void __init imx51_soc_init(void) /* i.mx51 has the i.mx35 type sdma */ imx_add_imx_sdma("imx35-sdma", MX51_SDMA_BASE_ADDR, MX51_INT_SDMA, &imx51_sdma_pdata); + + imx_cpuidle_init(&mx5_cpuidle_data); } void __init imx53_soc_init(void) |