diff options
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 22 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap-pm.h | 4 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap_device.h | 1 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap_hwmod.h | 1 | ||||
| -rw-r--r-- | arch/arm/plat-omap/omap-pm-noop.c | 23 | ||||
| -rw-r--r-- | arch/arm/plat-omap/omap_device.c | 28 |
6 files changed, 65 insertions, 14 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 03ffa3b..77a8be6 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -2188,3 +2188,25 @@ ohsps_unlock: return ret; } + +/** + * omap_hwmod_get_context_loss_count - get lost context count + * @oh: struct omap_hwmod * + * + * Query the powerdomain of of @oh to get the context loss + * count for this device. + * + * Returns the context loss count of the powerdomain assocated with @oh + * upon success, or zero if no powerdomain exists for @oh. + */ +u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh) +{ + struct powerdomain *pwrdm; + int ret = 0; + + pwrdm = omap_hwmod_get_pwrdm(oh); + if (pwrdm) + ret = pwrdm_get_context_loss_count(pwrdm); + + return ret; +} diff --git a/arch/arm/plat-omap/include/plat/omap-pm.h b/arch/arm/plat-omap/include/plat/omap-pm.h index 47d6110..c07bb44 100644 --- a/arch/arm/plat-omap/include/plat/omap-pm.h +++ b/arch/arm/plat-omap/include/plat/omap-pm.h @@ -350,9 +350,9 @@ unsigned long omap_pm_cpu_get_freq(void); * driver must restore device context. If the number of context losses * exceeds the maximum positive integer, the function will wrap to 0 and * continue counting. Returns the number of context losses for this device, - * or -EINVAL upon error. + * or zero upon error. */ -int omap_pm_get_dev_context_loss_count(struct device *dev); +u32 omap_pm_get_dev_context_loss_count(struct device *dev); #endif diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h index 28e2d1a..e4c349f 100644 --- a/arch/arm/plat-omap/include/plat/omap_device.h +++ b/arch/arm/plat-omap/include/plat/omap_device.h @@ -107,6 +107,7 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od); int omap_device_align_pm_lat(struct platform_device *pdev, u32 new_wakeup_lat_limit); struct powerdomain *omap_device_get_pwrdm(struct omap_device *od); +u32 omap_device_get_context_loss_count(struct platform_device *pdev); /* Other */ diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h index 619877c..2825b45 100644 --- a/arch/arm/plat-omap/include/plat/omap_hwmod.h +++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h @@ -569,6 +569,7 @@ int omap_hwmod_for_each_by_class(const char *classname, void *user); int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state); +u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh); /* * Chip variant-specific hwmod init routines - XXX should be converted diff --git a/arch/arm/plat-omap/omap-pm-noop.c b/arch/arm/plat-omap/omap-pm-noop.c index 19cb9f5..af58dad 100644 --- a/arch/arm/plat-omap/omap-pm-noop.c +++ b/arch/arm/plat-omap/omap-pm-noop.c @@ -20,9 +20,11 @@ #include <linux/init.h> #include <linux/cpufreq.h> #include <linux/device.h> +#include <linux/platform_device.h> /* Interface documentation is in mach/omap-pm.h */ #include <plat/omap-pm.h> +#include <plat/omap_device.h> /* * Device-driver-originated constraints (via board-*.c files) @@ -282,22 +284,19 @@ unsigned long omap_pm_cpu_get_freq(void) * Device context loss tracking */ -int omap_pm_get_dev_context_loss_count(struct device *dev) +u32 omap_pm_get_dev_context_loss_count(struct device *dev) { - if (!dev) { - WARN_ON(1); - return -EINVAL; - }; + struct platform_device *pdev = to_platform_device(dev); + u32 count; - pr_debug("OMAP PM: returning context loss count for dev %s\n", - dev_name(dev)); + if (WARN_ON(!dev)) + return 0; - /* - * Map the device to the powerdomain. Return the powerdomain - * off counter. - */ + count = omap_device_get_context_loss_count(pdev); + pr_debug("OMAP PM: context loss count for dev %s = %d\n", + dev_name(dev), count); - return 0; + return count; } diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index abe933c..57adb27 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c @@ -280,6 +280,34 @@ static void _add_optional_clock_alias(struct omap_device *od, /* Public functions for use by core code */ /** + * omap_device_get_context_loss_count - get lost context count + * @od: struct omap_device * + * + * Using the primary hwmod, query the context loss count for this + * device. + * + * Callers should consider context for this device lost any time this + * function returns a value different than the value the caller got + * the last time it called this function. + * + * If any hwmods exist for the omap_device assoiated with @pdev, + * return the context loss counter for that hwmod, otherwise return + * zero. + */ +u32 omap_device_get_context_loss_count(struct platform_device *pdev) +{ + struct omap_device *od; + u32 ret = 0; + + od = _find_by_pdev(pdev); + + if (od->hwmods_cnt) + ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); + + return ret; +} + +/** * omap_device_count_resources - count number of struct resource entries needed * @od: struct omap_device * * |