For devices which have not (yet) been converted to use omap_device, implement the context loss counter using the "brutal method" as originally proposed by Paul Walmsley[1].
The dummy context loss counter is incremented every time it is checked, but only when off-mode is enabled. When off-mode is disabled, the dummy counter stops incrementing. Tested on 36xx/Zoom3 using MMC driver, which is currently the only in-tree user of this API. This patch should be reverted after all devices are converted to using omap_device. [1] http://marc.info/?l=linux-omap&m=129176260000626&w=2 Cc: Paul Walmsley <p...@pwsan.com> Signed-off-by: Kevin Hilman <khil...@deeprootsystems.com> --- arch/arm/mach-omap2/pm-debug.c | 2 ++ arch/arm/plat-omap/include/plat/omap-pm.h | 1 + arch/arm/plat-omap/omap-pm-noop.c | 19 ++++++++++++++++++- 3 files changed, 21 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c index e535082..af66acb 100644 --- a/arch/arm/mach-omap2/pm-debug.c +++ b/arch/arm/mach-omap2/pm-debug.c @@ -32,6 +32,7 @@ #include "powerdomain.h" #include "clockdomain.h" #include <plat/dmtimer.h> +#include <plat/omap-pm.h> #include "cm2xxx_3xxx.h" #include "prm2xxx_3xxx.h" @@ -581,6 +582,7 @@ static int option_set(void *data, u64 val) *option = val; if (option == &enable_off_mode) { + omap_pm_enable_off_mode(val ? true : false); if (cpu_is_omap34xx()) omap3_pm_off_mode_enable(val); } diff --git a/arch/arm/plat-omap/include/plat/omap-pm.h b/arch/arm/plat-omap/include/plat/omap-pm.h index 9870b4f..cfa5e44 100644 --- a/arch/arm/plat-omap/include/plat/omap-pm.h +++ b/arch/arm/plat-omap/include/plat/omap-pm.h @@ -372,5 +372,6 @@ unsigned long omap_pm_cpu_get_freq(void); */ int omap_pm_get_dev_context_loss_count(struct device *dev); +void omap_pm_enable_off_mode(bool enable); #endif diff --git a/arch/arm/plat-omap/omap-pm-noop.c b/arch/arm/plat-omap/omap-pm-noop.c index 5a58f97..32f2818 100644 --- a/arch/arm/plat-omap/omap-pm-noop.c +++ b/arch/arm/plat-omap/omap-pm-noop.c @@ -30,6 +30,9 @@ struct omap_opp *dsp_opps; struct omap_opp *mpu_opps; struct omap_opp *l3_opps; +static bool off_mode_enabled; +static u32 dummy_context_loss_counter; + /* * Device-driver-originated constraints (via board-*.c files) */ @@ -287,6 +290,10 @@ unsigned long omap_pm_cpu_get_freq(void) /* * Device context loss tracking */ +void omap_pm_enable_off_mode(bool enable) +{ + off_mode_enabled = enable; +} int omap_pm_get_dev_context_loss_count(struct device *dev) { @@ -298,7 +305,17 @@ int omap_pm_get_dev_context_loss_count(struct device *dev) return -EINVAL; }; - count = omap_device_get_context_loss_count(pdev); + if (dev->parent == &omap_device_parent) { + count = omap_device_get_context_loss_count(pdev); + } else { + WARN_ONCE(off_mode_enabled, "using dummy context loss counter, " + "device %s should be converted to omap_device.", + __func__, dev_name(dev)); + if (off_mode_enabled) + dummy_context_loss_counter++; + count = dummy_context_loss_counter; + } + pr_debug("OMAP PM: context loss count for dev %s = %d\n", dev_name(dev), count); -- 1.7.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
