From patchwork Mon May 21 22:50:29 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [v5,6/7] ARM: imx: Add imx5 cpuidle From: Robert Lee X-Patchwork-Id: 160498 Message-Id: <1337640630-29176-7-git-send-email-rob.lee@linaro.org> To: kernel@pengutronix.de Cc: linaro-dev@lists.linaro.org, patches@linaro.org, daniel.lezcano@linaro.org, linux-kernel@vger.kernel.org, amit.kucheria@linaro.org, jj@chaosbits.net, richard.zhao@freescale.com, u.kleine-koenig@pengutronix.de, shawn.guo@linaro.org, linux-arm-kernel@lists.infradead.org Date: Mon, 21 May 2012 17:50:29 -0500 Add cpuidle driver for imx5 platform. Signed-off-by: Robert Lee --- arch/arm/mach-imx/pm-imx5.c | 43 +++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 41 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-imx/pm-imx5.c b/arch/arm/mach-imx/pm-imx5.c index b3dcd8e..19621ed1 100644 --- a/arch/arm/mach-imx/pm-imx5.c +++ b/arch/arm/mach-imx/pm-imx5.c @@ -12,10 +12,12 @@ #include #include #include +#include #include #include #include #include +#include #include #include "crm-regs-imx5.h" @@ -134,12 +136,48 @@ static const struct platform_suspend_ops mx5_suspend_ops = { .enter = mx5_suspend_enter, }; -static void imx5_pm_idle(void) +static inline int imx5_cpu_do_idle(void) { - if (likely(!tzic_enable_wake())) + 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) { int ret; @@ -157,6 +195,7 @@ static int __init imx5_pm_common_init(void) /* 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; }