Alexander Graf 601147b06a serial: bcm283x_mu: Detect disabled serial device ... On the raspberry pi, you can disable the serial port to gain dynamic frequency scaling which can get handy at times. However, in such a configuration the serial controller gets its rx queue filled up with zero bytes which then happily get transmitted on to whoever calls getc() today. This patch adds detection logic for that case by checking whether the RX pin is mapped to GPIO15 and disables the mini uart if it is not mapped properly. That way we can leave the driver enabled in the tree and can determine during runtime whether serial is usable or not, having a single binary that allows for uart and non-uart operation. Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Reviewed-by: Simon Glass <sjg@chromium.org>		2016-09-06 13:18:19 -04:00
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platform_data	serial: bcm283x_mu: Detect disabled serial device	2016-09-06 13:18:19 -04:00
device-internal.h	dm: allow setting driver_data before/during bind	2016-05-26 20:48:31 -06:00
device.h	dm: core: Add a function to bind child devices	2016-07-27 14:14:37 -06:00
lists.h	dm: core: allow device_bind() to not return a device pointer	2015-08-31 07:57:29 -06:00
pinctrl.h	dm: pinctrl: Add a way for a GPIO driver to obtain a pin function	2016-01-21 20:42:35 -07:00
platdata.h	dm: core: Expand platdata for of-platdata devices	2016-07-14 20:40:24 -06:00
root.h	dm: Add dm_scan_other() to locate board-specific devices	2014-07-23 14:08:37 +01:00
test.h	video: sandbox: Allow selection of font size and console name	2016-01-30 10:57:30 +01:00
uclass-id.h	Add a power domain framework/uclass	2016-07-27 16:29:56 -06:00
uclass-internal.h	dm: core: Export uclass_find_device_by_of_offset()	2016-01-21 20:42:35 -07:00
uclass.h	dm: core: Add a way to find a device by its driver	2016-07-25 20:46:43 -06:00
util.h	devres: add debug command to dump device resources	2015-08-06 07:44:29 -06:00