u-boot.git/drivers/pinctrl/pinctrl-uclass.c, branch v2017.05

dm: allow limiting pre-reloc markings to spl or tpl

2017-03-16T22:03:44+00:00

Right now the u-boot,dm-pre-reloc flag will make each marked node
always appear in both spl and tpl. But systems needing an additional
tpl might have special constraints for each, like the spl needing to
be very tiny.

So introduce two additional flags to mark nodes for only spl or tpl
environments and introduce a function dm_fdt_pre_reloc to automate
the necessary checks in code instances checking for pre-relocation
flags.

The behaviour of the original flag stays untouched and still marks
a node for both spl and tpl.

Signed-off-by: Heiko Stuebner 
Reviewed-by: Simon Glass 
Tested-by: Kever Yang

dm: core: Replace of_offset with accessor

2017-02-08T13:12:14+00:00

At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass

libfdt: Bring in upstream stringlist functions

2016-10-13T19:54:10+00:00

These have now landed upstream. The naming is different and in one case the
function signature has changed. Update the code to match.

This applies the following upstream commits by
Thierry Reding  :

   604e61e fdt: Add functions to retrieve strings
   8702bd1 fdt: Add a function to get the index of a string
   2218387 fdt: Add a function to count strings

Signed-off-by: Simon Glass

pinctrl: fix typos in comment blocks of pinconfig_post_bind()

2016-08-20T18:03:28+00:00

'-' is never used in function names.

Signed-off-by: Masahiro Yamada

pinctrl: add the DM_UC_FLAG_SEQ_ALIAS flag for numbering the devices

2016-05-25T01:00:18+00:00

It is possible to have multiple pin controllers in the system. Use the
DM_UC_FLAG_SEQ_ALIAS flag so that the pinctrl instances are assigned
a sequence number.

Cc: Masahiro Yamada 
Cc: Simon Glass 
Signed-off-by: Thomas Abraham 
Reviewed-by: Simon Glass 
Signed-off-by: Minkyu Kang

dm: pinctrl: Add a way for a GPIO driver to obtain a pin function

2016-01-22T03:42:35+00:00

GPIO drivers want to be able to show if a pin is enabled for input, output,
or is being used by another function. Some drivers can easily find this
and the code is included in the driver. For some SoCs this is more complex.
Conceptually this should be handled by pinctrl rather than GPIO. Most
pinctrl drivers will have this feature anyway.

Add a method by which a GPIO driver can obtain the pin mux value given a
GPIO reference. This avoids repeating the code in two places.

Signed-off-by: Simon Glass

dm: pinctrl: Add a function to parse PIN_CONFIG flags

2016-01-22T03:42:34+00:00

Add a function which produces a flags word from a few common PIN_CONFIG
settings. This is useful for simple pinctrl drivers that don't need to worry
about drive strength, etc.

Signed-off-by: Simon Glass

pinctrl: Avoid binding all pinconfig nodes before relocation

2016-01-21T02:06:22+00:00

This can create a large number of pinctrl devices. It chews up early
malloc() memory and takes time. Only bind those which are marked as needed
before relocation.

Signed-off-by: Simon Glass

pinctrl: move dm_scan_fdt_node() out of pinctrl uclass

2015-09-19T21:42:15+00:00

Commit c5acf4a2b3c6 ("pinctrl: Add the concept of peripheral IDs")
added some additional change that was not mentioned in the git-log.

That commit added dm_scan_fdt_node() in the pinctrl uclass binding.
It should be handled by the simple-bus driver or the low-level
driver, not by the pinctrl framework.

I guess Simon's motivation was to bind GPIO banks located under the
Rockchip pinctrl device.  It is true some chips have sub-devices
under their pinctrl devices, but it is basically SoC-specific matter.

This commit partly reverts commit c5acf4a2b3c6 to keep the only
pinctrl-generic features in the uclass.  The dm_scan_fdt_node()
should be called from the rk3288_pinctrl driver.

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass 
Tested-by: Simon Glass

pinctrl: Add the concept of peripheral IDs

2015-09-03T03:28:22+00:00

My original pinctrl patch operating using a peripheral ID enum. This was
shared between pinmux and clock and provides an easy way to specify a device
that needs to be controlled, even it is does not (yet) have a driver within
driver model.

Masahiro's new simple pinctrl gets around this by providing a
set_state_simple() pinctrl method. By passing a device to that call the
peripheral ID becomes unnecessary. If the driver needs it, it can calculate
it itself and use it internally.

However this does not solve the problem for peripheral clocks. The 'pure'
solution would be to pass a driver to the clock uclass also. But this
requires that all devices should have a driver, and a struct udevide. Also
a key optimisation of the clock uclass is allowing a peripheral clock to
be set even when there is no device for that clock.

There may be a better way to achive the same goal, but for now it seems
expedient to add in peripheral ID to the pinctrl uclass. Two methods are
added - one to get the peripheral ID and one to select it. The existing
set_state_simple() is effectively the union of these.

Signed-off-by: Simon Glass