From mboxrd@z Thu Jan 1 00:00:00 1970 From: festevam@gmail.com (Fabio Estevam) Date: Wed, 2 Jul 2014 21:27:17 -0300 Subject: [PATCH v2] ARM: mx25: Add basic suspend/resume support Message-ID: <1404347237-19665-1-git-send-email-festevam@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Fabio Estevam Tested basic suspend/resume on a mx25pdk: root at freescale /$ echo mem > /sys/power/state PM: Syncing filesystems ... done. Freezing user space processes ... (elapsed 0.001 seconds) done. Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. Suspending console(s) (use no_console_suspend to debug) (Press the keypad) PM: suspend of devices complete after 5.637 msecs PM: late suspend of devices complete after 1.649 msecs PM: noirq suspend of devices complete after 1.874 msecs PM: noirq resume of devices complete after 1.643 msecs PM: early resume of devices complete after 1.923 msecs PM: resume of devices complete after 62.884 msecs Restarting tasks ... done. fec 50038000.ethernet eth0: Link is Down fec 50038000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx root at freescale /$ Signed-off-by: Fabio Estevam --- Change since v1: - Fix blank lines - Do not create a new file for storing the prototype arch/arm/mach-imx/Makefile | 2 +- arch/arm/mach-imx/imx25-dt.c | 1 + arch/arm/mach-imx/mx25.h | 2 ++ arch/arm/mach-imx/pm-imx25.c | 41 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 45 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-imx/pm-imx25.c diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index a364e20..ddc28d4 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -3,7 +3,7 @@ obj-y := time.o cpu.o system.o irq-common.o obj-$(CONFIG_SOC_IMX1) += clk-imx1.o mm-imx1.o obj-$(CONFIG_SOC_IMX21) += clk-imx21.o mm-imx21.o -obj-$(CONFIG_SOC_IMX25) += clk-imx25.o mm-imx25.o ehci-imx25.o cpu-imx25.o +obj-$(CONFIG_SOC_IMX25) += clk-imx25.o mm-imx25.o ehci-imx25.o cpu-imx25.o pm-imx25.o obj-$(CONFIG_SOC_IMX27) += cpu-imx27.o pm-imx27.o obj-$(CONFIG_SOC_IMX27) += clk-imx27.o mm-imx27.o ehci-imx27.o diff --git a/arch/arm/mach-imx/imx25-dt.c b/arch/arm/mach-imx/imx25-dt.c index cf8032b..2872ef7 100644 --- a/arch/arm/mach-imx/imx25-dt.c +++ b/arch/arm/mach-imx/imx25-dt.c @@ -33,6 +33,7 @@ DT_MACHINE_START(IMX25_DT, "Freescale i.MX25 (Device Tree Support)") .map_io = mx25_map_io, .init_early = imx25_init_early, .init_irq = mx25_init_irq, + .init_late = imx25_pm_init, .init_machine = imx25_dt_init, .dt_compat = imx25_dt_board_compat, .restart = mxc_restart, diff --git a/arch/arm/mach-imx/mx25.h b/arch/arm/mach-imx/mx25.h index ec46640..0bb5894 100644 --- a/arch/arm/mach-imx/mx25.h +++ b/arch/arm/mach-imx/mx25.h @@ -114,4 +114,6 @@ extern int mx25_revision(void); #endif +void imx25_pm_init(void); + #endif /* ifndef __MACH_MX25_H__ */ diff --git a/arch/arm/mach-imx/pm-imx25.c b/arch/arm/mach-imx/pm-imx25.c new file mode 100644 index 0000000..560baba --- /dev/null +++ b/arch/arm/mach-imx/pm-imx25.c @@ -0,0 +1,41 @@ +/* + * Copyright 2014 Freescale Semiconductor, Inc. + * + * 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. + */ + +#include +#include +#include + +#ifdef CONFIG_PM +static int mx25_suspend_enter(suspend_state_t state) +{ + switch (state) { + case PM_SUSPEND_MEM: + cpu_do_idle(); + break; + default: + return -EINVAL; + } + + return 0; +} +#else +static inline int mx25_suspend_enter(suspend_state_t state) +{ + return 0; +} +#endif + +static const struct platform_suspend_ops mx25_suspend_ops = { + .enter = mx25_suspend_enter, + .valid = suspend_valid_only_mem, +}; + +void __init imx25_pm_init(void) +{ + suspend_set_ops(&mx25_suspend_ops); +} -- 1.8.3.2