diff options
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/clk-imx51-imx53.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-imx/imx53-dt.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/mach-imx6q.c | 19 | ||||
| -rw-r--r-- | arch/arm/mach-imx/mach-mx53_ard.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/mach-mx53_evk.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/mach-mx53_loco.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/mach-mx53_smd.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/mm-imx5.c | 26 | ||||
| -rw-r--r-- | arch/arm/mach-imx/pm-imx5.c | 111 |
9 files changed, 116 insertions, 47 deletions
diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c index a2200c77bf70..4b89fae14a5a 100644 --- a/arch/arm/mach-imx/clk-imx51-imx53.c +++ b/arch/arm/mach-imx/clk-imx51-imx53.c @@ -279,6 +279,7 @@ static void __init mx5_clocks_common_init(unsigned long rate_ckil, clk_register_clkdev(clk[dummy], NULL, "imx-keypad"); clk_register_clkdev(clk[tve_gate], NULL, "imx-tve.0"); clk_register_clkdev(clk[ipu_di1_gate], "di1", "imx-tve.0"); + clk_register_clkdev(clk[gpc_dvfs], "gpc_dvfs", NULL); /* Set SDHC parents to be PLL2 */ clk_set_parent(clk[esdhc_a_sel], clk[pll2_sw]); @@ -336,7 +337,6 @@ int __init mx51_clocks_init(unsigned long rate_ckil, unsigned long rate_osc, clk_register_clkdev(clk[mx51_mipi], "mipi_hsp", NULL); clk_register_clkdev(clk[vpu_gate], NULL, "imx51-vpu.0"); clk_register_clkdev(clk[fec_gate], NULL, "imx27-fec.0"); - clk_register_clkdev(clk[gpc_dvfs], "gpc_dvfs", NULL); clk_register_clkdev(clk[ipu_gate], "bus", "imx51-ipu"); clk_register_clkdev(clk[ipu_di0_gate], "di0", "imx51-ipu"); clk_register_clkdev(clk[ipu_di1_gate], "di1", "imx51-ipu"); diff --git a/arch/arm/mach-imx/imx53-dt.c b/arch/arm/mach-imx/imx53-dt.c index fdd90805d98e..1b7a2fc36591 100644 --- a/arch/arm/mach-imx/imx53-dt.c +++ b/arch/arm/mach-imx/imx53-dt.c @@ -120,6 +120,7 @@ DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)") .handle_irq = imx53_handle_irq, .timer = &imx53_timer, .init_machine = imx53_dt_init, + .init_late = imx53_init_late, .dt_compat = imx53_dt_board_compat, .restart = mxc_restart, MACHINE_END diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index 426d2087c460..5ec0608f2a76 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -12,7 +12,9 @@ #include <linux/clk.h> #include <linux/clkdev.h> +#include <linux/cpuidle.h> #include <linux/delay.h> +#include <linux/export.h> #include <linux/init.h> #include <linux/io.h> #include <linux/irq.h> @@ -24,6 +26,7 @@ #include <linux/phy.h> #include <linux/micrel_phy.h> #include <linux/mfd/anatop.h> +#include <asm/cpuidle.h> #include <asm/smp_twd.h> #include <asm/hardware/cache-l2x0.h> #include <asm/hardware/gic.h> @@ -31,8 +34,10 @@ #include <asm/mach/time.h> #include <asm/system_misc.h> #include <mach/common.h> +#include <mach/cpuidle.h> #include <mach/hardware.h> + void imx6q_restart(char mode, const char *cmd) { struct device_node *np; @@ -169,6 +174,19 @@ static void __init imx6q_init_machine(void) imx6q_usb_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(); @@ -213,6 +231,7 @@ 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 diff --git a/arch/arm/mach-imx/mach-mx53_ard.c b/arch/arm/mach-imx/mach-mx53_ard.c index f641a1758691..6c28e65f424d 100644 --- a/arch/arm/mach-imx/mach-mx53_ard.c +++ b/arch/arm/mach-imx/mach-mx53_ard.c @@ -267,5 +267,6 @@ MACHINE_START(MX53_ARD, "Freescale MX53 ARD Board") .handle_irq = imx53_handle_irq, .timer = &mx53_ard_timer, .init_machine = mx53_ard_board_init, + .init_late = imx53_init_late, .restart = mxc_restart, MACHINE_END diff --git a/arch/arm/mach-imx/mach-mx53_evk.c b/arch/arm/mach-imx/mach-mx53_evk.c index a1060b26fb23..09fe2197b491 100644 --- a/arch/arm/mach-imx/mach-mx53_evk.c +++ b/arch/arm/mach-imx/mach-mx53_evk.c @@ -174,5 +174,6 @@ MACHINE_START(MX53_EVK, "Freescale MX53 EVK Board") .handle_irq = imx53_handle_irq, .timer = &mx53_evk_timer, .init_machine = mx53_evk_board_init, + .init_late = imx53_init_late, .restart = mxc_restart, MACHINE_END diff --git a/arch/arm/mach-imx/mach-mx53_loco.c b/arch/arm/mach-imx/mach-mx53_loco.c index 388c415d6b62..8abe23c1d3c8 100644 --- a/arch/arm/mach-imx/mach-mx53_loco.c +++ b/arch/arm/mach-imx/mach-mx53_loco.c @@ -316,5 +316,6 @@ MACHINE_START(MX53_LOCO, "Freescale MX53 LOCO Board") .handle_irq = imx53_handle_irq, .timer = &mx53_loco_timer, .init_machine = mx53_loco_board_init, + .init_late = imx53_init_late, .restart = mxc_restart, MACHINE_END diff --git a/arch/arm/mach-imx/mach-mx53_smd.c b/arch/arm/mach-imx/mach-mx53_smd.c index f297df7ccb39..b15d6a6d3b68 100644 --- a/arch/arm/mach-imx/mach-mx53_smd.c +++ b/arch/arm/mach-imx/mach-mx53_smd.c @@ -163,5 +163,6 @@ MACHINE_START(MX53_SMD, "Freescale MX53 SMD Board") .handle_irq = imx53_handle_irq, .timer = &mx53_smd_timer, .init_machine = mx53_smd_board_init, + .init_late = imx53_init_late, .restart = mxc_restart, MACHINE_END diff --git a/arch/arm/mach-imx/mm-imx5.c b/arch/arm/mach-imx/mm-imx5.c index 1d003053d562..f19d604e1b2a 100644 --- a/arch/arm/mach-imx/mm-imx5.c +++ b/arch/arm/mach-imx/mm-imx5.c @@ -16,7 +16,6 @@ #include <linux/clk.h> #include <linux/pinctrl/machine.h> -#include <asm/system_misc.h> #include <asm/mach/map.h> #include <mach/hardware.h> @@ -24,24 +23,6 @@ #include <mach/devices-common.h> #include <mach/iomux-v3.h> -static struct clk *gpc_dvfs_clk; - -static void imx5_idle(void) -{ - /* gpc clock is needed for SRPG */ - if (gpc_dvfs_clk == NULL) { - gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs"); - if (IS_ERR(gpc_dvfs_clk)) - return; - clk_prepare(gpc_dvfs_clk); - } - clk_enable(gpc_dvfs_clk); - mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF); - if (!tzic_enable_wake()) - cpu_do_idle(); - clk_disable(gpc_dvfs_clk); -} - /* * Define the MX50 memory map. */ @@ -105,7 +86,6 @@ void __init imx51_init_early(void) mxc_set_cpu_type(MXC_CPU_MX51); mxc_iomux_v3_init(MX51_IO_ADDRESS(MX51_IOMUXC_BASE_ADDR)); mxc_arch_reset_init(MX51_IO_ADDRESS(MX51_WDOG1_BASE_ADDR)); - arm_pm_idle = imx5_idle; } void __init imx53_init_early(void) @@ -243,4 +223,10 @@ void __init imx53_soc_init(void) void __init imx51_init_late(void) { mx51_neon_fixup(); + imx51_pm_init(); +} + +void __init imx53_init_late(void) +{ + imx53_pm_init(); } diff --git a/arch/arm/mach-imx/pm-imx5.c b/arch/arm/mach-imx/pm-imx5.c index e26a9cb05ed8..19621ed1ffa5 100644 --- a/arch/arm/mach-imx/pm-imx5.c +++ b/arch/arm/mach-imx/pm-imx5.c @@ -12,19 +12,30 @@ #include <linux/clk.h> #include <linux/io.h> #include <linux/err.h> +#include <linux/export.h> #include <asm/cacheflush.h> +#include <asm/system_misc.h> #include <asm/tlbflush.h> #include <mach/common.h> +#include <mach/cpuidle.h> #include <mach/hardware.h> #include "crm-regs-imx5.h" -static struct clk *gpc_dvfs_clk; +/* + * The WAIT_UNCLOCKED_POWER_OFF state only requires <= 500ns to exit. + * This is also the lowest power state possible without affecting + * non-cpu parts of the system. For these reasons, imx5 should default + * to always using this state for cpu idling. The PM_SUSPEND_STANDBY also + * uses this state and needs to take no action when registers remain confgiured + * for this state. + */ +#define IMX5_DEFAULT_CPU_IDLE_STATE WAIT_UNCLOCKED_POWER_OFF /* * set cpu low power mode before WFI instruction. This function is called * mx5 because it can be used for mx50, mx51, and mx53. */ -void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode) +static void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode) { u32 plat_lpc, arm_srpgcr, ccm_clpcr; u32 empgc0, empgc1; @@ -87,11 +98,6 @@ void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode) } } -static int mx5_suspend_prepare(void) -{ - return clk_prepare_enable(gpc_dvfs_clk); -} - static int mx5_suspend_enter(suspend_state_t state) { switch (state) { @@ -99,7 +105,7 @@ static int mx5_suspend_enter(suspend_state_t state) mx5_cpu_lp_set(STOP_POWER_OFF); break; case PM_SUSPEND_STANDBY: - mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF); + /* DEFAULT_IDLE_STATE already configured */ break; default: return -EINVAL; @@ -114,12 +120,10 @@ static int mx5_suspend_enter(suspend_state_t state) __raw_writel(0, MXC_SRPG_EMPGC1_SRPGCR); } cpu_do_idle(); - return 0; -} -static void mx5_suspend_finish(void) -{ - clk_disable_unprepare(gpc_dvfs_clk); + /* return registers to default idle state */ + mx5_cpu_lp_set(IMX5_DEFAULT_CPU_IDLE_STATE); + return 0; } static int mx5_pm_valid(suspend_state_t state) @@ -129,25 +133,80 @@ static int mx5_pm_valid(suspend_state_t state) static const struct platform_suspend_ops mx5_suspend_ops = { .valid = mx5_pm_valid, - .prepare = mx5_suspend_prepare, .enter = mx5_suspend_enter, - .finish = mx5_suspend_finish, }; -static int __init mx5_pm_init(void) +static inline int imx5_cpu_do_idle(void) +{ + int ret = tzic_enable_wake(); + + if (likely(!ret)) + cpu_do_idle(); + + return ret; +} + +static void imx5_pm_idle(void) +{ + imx5_cpu_do_idle(); +} + +static int imx5_cpuidle_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) +{ + int ret; + + ret = imx5_cpu_do_idle(); + if (ret < 0) + return ret; + + return idx; +} + +static struct cpuidle_driver imx5_cpuidle_driver = { + .name = "imx5_cpuidle", + .owner = THIS_MODULE, + .en_core_tk_irqen = 1, + .states[0] = { + .enter = imx5_cpuidle_enter, + .exit_latency = 2, + .target_residency = 1, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "IMX5 SRPG", + .desc = "CPU state retained,powered off", + }, + .state_count = 1, +}; + +static int __init imx5_pm_common_init(void) { - if (!cpu_is_mx51() && !cpu_is_mx53()) - return 0; + int ret; + struct clk *gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs"); - if (gpc_dvfs_clk == NULL) - gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs"); + if (IS_ERR(gpc_dvfs_clk)) + return PTR_ERR(gpc_dvfs_clk); - if (!IS_ERR(gpc_dvfs_clk)) { - if (cpu_is_mx51()) - suspend_set_ops(&mx5_suspend_ops); - } else - return -EPERM; + ret = clk_prepare_enable(gpc_dvfs_clk); + if (ret) + return ret; + arm_pm_idle = imx5_pm_idle; + + /* Set the registers to the default cpu idle state. */ + mx5_cpu_lp_set(IMX5_DEFAULT_CPU_IDLE_STATE); + + imx_cpuidle_init(&imx5_cpuidle_driver); return 0; } -device_initcall(mx5_pm_init); + +void __init imx51_pm_init(void) +{ + int ret = imx5_pm_common_init(); + if (!ret) + suspend_set_ops(&mx5_suspend_ops); +} + +void __init imx53_pm_init(void) +{ + imx5_pm_common_init(); +} |