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Convert to use set_flags operation.
For now following flags are supported:
- GPIOD_IS_AF (i.e. "alternate function").
- GPIOD_IS_IN
- GPIOD_IS_OUT
Tested-by: Łukasz Majewski <[email protected]> # Colibri T30
Signed-off-by: Lukasz Majewski <[email protected]>
Reviewed-by: Svyatoslav Ryhel <[email protected]>
Signed-off-by: Svyatoslav Ryhel <[email protected]>
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Releasing a GPIO on Tegra necessitates changing its configuration to SFIO
to activate its special function. Without this reconfiguration, the special
function will be unavailable.
Signed-off-by: Svyatoslav Ryhel <[email protected]>
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Assorted Tegra enhancements. Merged with the recent XPL_BUILD changes,
resolve some whitespace issues and fix the name of the new apalis-tk1
env file by Tom.
Signed-off-by: Tom Rini <[email protected]>
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In some cases access to GPIOs is needed so early that DM
is not ready even nearly. These functions are exactly for
this case.
Signed-off-by: Svyatoslav Ryhel <[email protected]>
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Use the new symbol to refer to any 'SPL' build, including TPL and VPL
Signed-off-by: Simon Glass <[email protected]>
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As part of bringing the master branch back in to next, we need to allow
for all of these changes to exist here.
Reported-by: Jonas Karlman <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
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When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay
Ethernet"' I failed to notice that b4 noticed it was based on next and
so took that as the base commit and merged that part of next to master.
This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing
changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35.
Reported-by: Jonas Karlman <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
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Remove <common.h> from this driver directory and when needed
add missing include files directly.
Reviewed-by: Heiko Schocher <[email protected]>
Reviewed-by: Peter Robinson <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
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The fdt_addr_t and phys_addr_t size have been decoupled. A 32bit CPU
can expect 64-bit data from the device tree parser, so use
dev_read_addr_ptr instead of the dev_read_addr function in the
various files in the drivers directory that cast to a pointer.
As we are there also streamline the error response to -EINVAL on return.
Signed-off-by: Johan Jonker <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <[email protected]>
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It is not a good idea to use things called CONFIG_xxx in the source code
since this prefix is reserved for use by Kconfig. Rename these variables.
Signed-off-by: Simon Glass <[email protected]>
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Most drivers use these access methods but a few do not. Update them.
In some cases the access is not permitted, so mark those with a FIXME tag
for the maintainer to check.
Signed-off-by: Simon Glass <[email protected]>
Acked-by: Andy Shevchenko <[email protected]>
Acked-by: Pratyush Yadav <[email protected]>
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Try to maintain some consistency between these variables by using _plat as
a suffix for them.
Signed-off-by: Simon Glass <[email protected]>
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We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).
Rename some of the latter variables to end with 'plat' for consistency.
Signed-off-by: Simon Glass <[email protected]>
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This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.
Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.
Signed-off-by: Simon Glass <[email protected]>
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The need for this can be avoided by passing the correct node to the
device_bind() function.
Signed-off-by: Simon Glass <[email protected]>
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This function is not needed since the standard device_bind() can be used
instead.
Signed-off-by: Simon Glass <[email protected]>
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This function is not necessary anymore, since device_bind_ofnode() does
the same thing and works with both flattree and livetree.
Rename it to indicate that it is special.
Signed-off-by: Simon Glass <[email protected]>
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Move this header out of the common header.
Signed-off-by: Simon Glass <[email protected]>
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When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be
bound before relocation. However due to a bug in the DM core,
the flag only takes effect when devices are statically declared
via U_BOOT_DEVICE(). This bug has been fixed recently by commit
"dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in
lists_bind_fdt()", but with the fix, it has a side effect that
all existing drivers that declared DM_FLAG_PRE_RELOC flag will
be bound before relocation now. This may expose potential boot
failure on some boards due to insufficient memory during the
pre-relocation stage.
To mitigate this potential impact, the following changes are
implemented:
- Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver
only supports configuration from device tree (OF_CONTROL)
- Keep DM_FLAG_PRE_RELOC flag in the driver only if the device
is statically declared via U_BOOT_DEVICE()
- Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for
drivers that support both statically declared devices and
configuration from device tree
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Patrick Delaunay <[email protected]>
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When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <[email protected]>
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We have a large number of places where while we historically referenced
gd in the code we no longer do, as well as cases where the code added
that line "just in case" during development and never dropped it.
Signed-off-by: Tom Rini <[email protected]>
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Update the GPIO driver to support a live device tree.
Signed-off-by: Simon Glass <[email protected]>
Tested-by: Marcel Ziswiler <[email protected]>
Tested-on: Beaver, Jetson-TK1
Tested-by: Stephen Warren <[email protected]>
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Move the main part of the GPIO request function into a separate function
so that it can be used by the live tree function when added. Update the
xlate method to use a node reference.
Update all GPIO drivers to handle the modified xlate() method.
Signed-off-by: Simon Glass <[email protected]>
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These support the flat device tree. We want to use the dev_read_..()
prefix for functions that support both flat tree and live tree. So rename
the existing functions to avoid confusion.
In the end we will have:
1. dev_read_addr...() - works on devices, supports flat/live tree
2. devfdt_get_addr...() - current functions, flat tree only
3. of_get_address() etc. - new functions, live tree only
All drivers will be written to use 1. That function will in turn call
either 2 or 3 depending on whether the flat or live tree is in use.
Note this involves changing some dead code - the imx_lpi2c.c file.
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
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The tegra GPIO controller has two ways of reading the value of a GPIO. It
can supply the 'input' value (which is the value read from the pin) and the
'output' value (which is the value being driven from the pin. With a GPIO
set to output mode, the 'input' value is always low which is not very
useful.
This has the unfortunate result that setting a GPIO high still leaves it
showing as low in the 'gpio status' command.
Adjust the driver to check which direction the GPIO is set to, then read
the value from the appropriate register: 'input' for input GPIOs, 'output'
for output GPIOs.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Joe Hershberger <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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In order to make it clear what the parameters to set_config() and
set_direction() mean, and similarly for the return values from the
respective get_*(), define named constants for these values.
Disassembly shows no diff in the generated code, except that the
order of the code in the branches of tegra_gpio_get_function() gets
modified without affecting behaviour.
Suggested-by: Tom Warren <[email protected]>
Signed-off-by: Stephen Warren <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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These enum values aren't used anywhere. Remove them.
Signed-off-by: Stephen Warren <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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Tegra's GPIO driver currently enables pins as GPIO as soon as they're
requested. This is not safe, since the desired direction and output value
are not yet known. This could cause a glitch on the output pins between
gpio_request() and gpio_direction_*(), depending on what values happen to
be in the GPIO controller's in/out and out-value registers vs. the final
desired configuration.
To solve this, defer enabling pins as GPIOs until some gpio_direction_*()
is invoked, and the desired configuration is explicitly programmed.
In theory this change could cause regressions, if code exists that claims
a GPIO, never explicitly sets a direction, and then gets/sets the GPIO
value based on that assumption. However, I've read through all the Tegra-
related board files and device drivers that touch GPIOs and I do not see
such buggy code anywhere.
Signed-off-by: Stephen Warren <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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Tegra's gpio_config_table() currently uses common GPIO APIs. These used
to work without requesting the GPIO, but since commit 2fccd2d96bad "tegra:
Convert tegra GPIO driver to use driver model" no longer do so. This
prevents any of the GPIO initialization table from being applied to HW.
Fix gpio_config_table() to directly program the HW to solve this.
Fixes: 2fccd2d96bad ("tegra: Convert tegra GPIO driver to use driver model")
Signed-off-by: Stephen Warren <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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This is a convenient way for a driver to get the hardware address of a
device, when regmap or syscon are not being used. Change existing callers
to use it as an example to others.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Joe Hershberger <[email protected]>
Acked-by: Stephen Warren <[email protected]>
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Add a convenience function to access the private data that a uclass stores
for each of its devices. Convert over most existing uses for consistency
and to provide an example for others.
Signed-off-by: Simon Glass <[email protected]>
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Use the full driver model GPIO and serial drivers in SPL now that these are
supported. Since device tree is not available they will use platform data.
Remove the special SPL GPIO function as it is no longer needed.
This is all in one commit to maintain bisectability.
Signed-off-by: Simon Glass <[email protected]>
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This deals with the polarity bit and selecting the correct bank device
given a GPIO number.
Signed-off-by: Simon Glass <[email protected]>
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Now that the uclass supports gpio_request/free() there is no need for the
driver to implement it too. Drop this unnecessary code.
Signed-off-by: Simon Glass <[email protected]>
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Fix Tegra GPIO driver to not crash resp. misbehave upon requesting
GPIOs with an empty aka NULL label. As the driver uses exclusively the
label to check for reservation status actually supplying one is
mandatory!
This fixes a regression introduced by commit:
2fccd2d96badcdf6165658a99771a4c475586279
tegra: Convert tegra GPIO driver to use driver model
Signed-off-by: Marcel Ziswiler <[email protected]>
Acked-by: Simon Glass <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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This is an implementation of GPIOs for Tegra that uses driver model. It has
been tested on trimslice and also using the new iotrace feature.
The implementation uses a top-level GPIO device (which has no actual GPIOS).
Under this all the banks are created as separate GPIO devices.
The GPIOs are named as per the Tegra datasheet/header files: A0..A7, B0..B7,
..., Z0..Z7, AA0..AA7, etc.
Since driver model is not yet available before relocation, or in SPL, a
special function is provided for seaboard's SPL code.
Signed-off-by: Simon Glass <[email protected]>
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The HW-defined procedure for booting Tegra requires that some pins be
set up as GPIOs immediately at boot in order to avoid glitches on those
pins, when the pinmux is programmed. Add a feature to the GPIO driver
which executes a GPIO configuration table. Board files will use this to
implement the correct HW initialization procedure.
Signed-off-by: Stephen Warren <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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Signed-off-by: Wolfgang Denk <[email protected]>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <[email protected]>
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The move is pretty straight-forward. ap20.h and tegra20.h were renamed to ap.h and tegra.h.
Some files remain in arch-tegra20 but 'include' a file in 'arch-tegra' with #defines & structs
that will be common between T20 and T30 HW. HW-specific #defines, etc. stay in the 'arch-tegra20'
'root' file.
All boards build OK w/MAKEALL -s tegra20. Checkpatch.pl runs clean. Seaboard works OK.
Signed-off-by: Tom Warren <[email protected]>
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Convert TEGRA20_ defines to either TEGRA_ or NV_PA_ where appropriate.
Convert tegra20_ source file and function names to tegra_, also.
Upcoming Tegra30 port will use common code/defines/names where possible.
Signed-off-by: Tom Warren <[email protected]>
Acked-by: Stephen Warren <[email protected]>
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This is make naming consistent with the kernel and devicetree and in
preparation of pulling out the common tegra20 code.
Signed-off-by: Allen Martin <[email protected]>
Acked-by: Stephen Warren <[email protected]>
Tested-by: Thierry Reding <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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In anticipation of Tegra3 support, continue removing/renaming
Tegra2-specific files. No functional changes (yet).
Updated copyrights to 2012.
Signed-off-by: Tom Warren <[email protected]>
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