pinctrl_register returns a pointer of struct type struct pinctrl_dev,
if successfully registered to pinctrl subsystem, otherwise returns
NULL, and there wont' be any pointers which are not dereferencible.
They are not type of pointer addresses but are kind of error
codes rather actual addresses, but are a kind of return
codes of functions returning integer types.
return -ENODEV if device registration fails.
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The gpio ranges will be automatically removed when the pinctrl
driver is unregistered.
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Print an explicit error message in various failure cases to allow
easier diagnosis.
WARN_ON() some internal failures that users/clients shouldn't be able to
trigger.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
* Only provide debugfs-relates ops when CONFIG_DEBUG_FS is enabled.
* Implement pin_config_group_dbg_show op.
* Implement pin_config_config_dbg_show op.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Rather than having a single tegra-pinctrl driver that determines whether
it's running on Tegra20 or Tegra30, instead have separate drivers for
each that call into utility functions to implement the majority of the
driver. This change is based on review feedback of the SPEAr pinctrl
driver, which had originally copied to Tegra driver structure.
This requires that the two drivers have unique names. Update a couple
spots in arch/arm/mach-tegra for the name change.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
* Rename old pinmux and new pinctrl platform driver and DT match table
entries, so the new driver gets instantiated.
* Re-write board-pinmux.c, so that it uses pinctrl APIs to configura the
pinmux.
* Re-write board-*-pinmux.c so that the pinmux configuration tables are
in pinctrl format.
Ventana's pin mux table needed some edits on top of the basic format
conversion, since some mux options that were previously marked as
reserved are now valid in the new pinctrl driver. Attempting to use the
old reserved names will result in a failure. Specifically, groups lpw0,
lpw2, lsc1, lsck, and lsda were changed from function rsvd4 to displaya,
and group pta was changed from function rsvd2 to hdmi.
All boards' pin mux tables needed some edits on top of the based format
conversion, since function i2c was split into i2c1 (first general I2C
controller) and i2cp (power I2C controller) to better align function
definitions with HW blocks.
Due to the split of mux tables into pure mux and pull/tristate tables,
many entries in the separate Seaboard/Ventana tables could be merged
into the common table, since the entries differed only in the portion
in one of the tables, not both.
Most pin groups allow configuration of mux, tri-state, and pull. However,
some don't allow pull configuration, which is instead configured by new
groups that only allow pull configuration. This is a reflection of the
true HW capabilities, which weren't fully represented by the old pinmux
driver. This required adding new pull table entries for those new groups,
and setting many other entries' pull configuration to
TEGRA_PINCONFIG_DONT_SET.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Implement pinctrl_ops dt_node_to_map() and dt_free_map(). These allow
complete specification of the desired pinmux configuration using device
tree.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Most of the SoC drivers implement list_groups() and list_functions()
routines for pinctrl and pinmux. These routines continue returning
zero until the selector argument is greater than total count of
available groups or functions.
This patch replaces these list_*() routines with get_*_count()
routines, which returns the number of available selection for SoC
driver. pinctrl layer will use this value to check the range it can
choose.
This patch fixes all user drivers for this change. There are other
routines in user drivers, which have checks to check validity of
selector passed to them. It is also no more required and hence
removed.
Documentation updated as well.
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
[Folded in fix and fixed a minor merge artifact manually]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This adds a driver for the Tegra pinmux, and required parameterization
data for Tegra20 and Tegra30.
The driver is initially added with driver name and device tree compatible
value that won't cause this driver to be used. A later change will switch
the pinctrl driver to use the correct values, switch the old pinmux
driver to be disabled, and update all code that uses the old pinmux APIs
to use the new pinctrl APIs.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
[squashed "fix case of Tegra30's foo_groups[] arrays"]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Devendra Naga