[lkml]   [2014]   [Feb]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 3/3] mfd: arizona: Use new regmap features for manual register patch
> On the wm5102 the register patches are applied manually, rather than by
> the regmap core. This application is wrapped in calls to
> regcache_cache_bypass. However, this is dangerous as other threads may
> be accessing the hardware at the same time as the pm_runtime operations
> and if they do so during the period whilst cache_bypass is enabled those
> writes will miss the cache when they shouldn't.
> Apply the register patch using the new regmap_apply_patch function to
> avoid this problem. Also remove the call to regcache_cache_bypass from
> the hardware patch application as it is unneeded there and creates a
> similar window for writes to miss the cache.
> Signed-off-by: Charles Keepax <>
> ---
> drivers/mfd/arizona-core.c | 4 ----
> drivers/mfd/wm5102-tables.c | 19 ++-----------------
> 2 files changed, 2 insertions(+), 21 deletions(-)

Applied, thanks.

Lee Jones
Linaro STMicroelectronics Landing Team Lead │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2014-02-24 18:01    [W:0.065 / U:1.648 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site