linux-toradex.git/drivers/pinctrl/pxa, branch v5.0

pinctrl: pxa: pxa2xx: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE

2017-11-30T13:42:04+00:00

This change resolves a new compile-time warning
when built as a loadable module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/pinctrl/pxa/pinctrl-pxa2xx.o
see include/linux/module.h for more information

This adds the license as "GPL v2", which matches the header of the file.

MODULE_DESCRIPTION and MODULE_AUTHOR are also added.

Signed-off-by: Jesse Chan 
Signed-off-by: Linus Walleij

pinctrl: pxa: Use devm_pinctrl_register() for pinctrl registration

2016-04-20T22:03:04+00:00

Use devm_pinctrl_register() for pin control registration and clean
the error path.

Signed-off-by: Laxman Dewangan 
Cc: Daniel Mack 
Cc: Haojian Zhuang 
Cc: Robert Jarzmik 
Cc: linux-arm-kernel@lists.infradead.org
Acked-by: Robert Jarzmik 
Signed-off-by: Linus Walleij

pinctrl: pxa: add pxa25x architecture

2016-04-14T12:08:29+00:00

Add the pxa25x architecture, which is a pxa2xx with 85 pins. The
registers spacing, and pins logic is common to pxa2xx, only the pins and
their alternate function are specific to pxa25x.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Linus Walleij

pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map

2016-04-01T13:06:36+00:00

Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map, since
it does not depend on device tree despite the current name. This
will enforce a consistent naming in pinctr-utils.c and will make
it clear it can be called from outside device tree (e.g. from
ACPI handling code).

Signed-off-by: Irina Tirdea 
Signed-off-by: Linus Walleij

pinctrl: pxa2xx: export symbols

2016-03-09T02:10:02+00:00

The pxa2xxx fails some automated builds because of unexported
symbols.

Reported-by: kbuild test robot 
Signed-off-by: Linus Walleij

pinctrl: pxa: pxa2xx: add pin control skeleton

2015-12-15T13:07:06+00:00

The wrong free functions were used to release temporary buffers.

This didn't show up in the normal driver's life. Yet in suspend to RAM,
the managed resource list is walked, and as memory was released, the
list is corrupted and make the kernel Oops.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Linus Walleij

pinctrl: pxa: add pxa27x architecture

2015-12-10T15:13:09+00:00

Add the pxa27x architecture, which is a pxa2xx with 128 pins. The
registers spacing, and pins logic is common to pxa2xx, only the pins and
their alternate function are specific to pxa27x.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Linus Walleij

pinctrl: pxa: pxa2xx: add pin configuration support

2015-12-10T15:12:35+00:00

Add pin configuration for pxa2xx architectures. PXA doesn't provide any
bias, push, pull capabilities. The only capability is to set a state for
the pins when the platform enter sleep or deep sleep mode.

The state of a pin is set by :
 - whether the GPIO direction was input or output
 - if it is output, a register set programs whether the pin should be
   held to ground or VccIO

Signed-off-by: Robert Jarzmik 
Signed-off-by: Linus Walleij

pinctrl: pxa: pxa2xx: add pin muxing

2015-12-10T15:11:35+00:00

The driver is inspired from the sunxi driver. The pxa architecture
specificities leading to the driver are :
 - each pin has 8 possible alternate functions
 - 4 of these are output kind
 - 4 of these are input kind
 - there is always a "gpio input" and "gpio output" function
 - the function matrix is very scattered :
   - some functions can be found on 5 different pads
   - the number of functions is greater than the number of pins
   - there is no "topology" grouping of pins (such as all SPI in one
     corner of the die)

Signed-off-by: Robert Jarzmik 
Signed-off-by: Linus Walleij

pinctrl: pxa: pxa2xx: add pin control skeleton

2015-12-10T15:10:16+00:00

Add a pincontrol driver for pxa2xx architecture, encompassing all pxa25x
and pxa27x variants. This is only the pin muxing part of the driver.

One specific consideration is also the memory space (MMIO), which is
intertwined with the GPIO registers. To make things worse, the GPIO
direction register also affect pin muxing, as it chooses the "kind" of
pin, ie. the 4 output functions or 4 input functions.

The mapping between pinctrl notions and PXA Technical Reference Manual
is as follows :
 - a pin is obviously a pin
 - a group is also a pin, ie. group P101 is the pin 101
 - a mux function is an alternate function
   (ie. gpio-in, gpio-out, MMCLK, BTRTS, etc ...)

The individual architecture (pxa27x, pxa25x) instantiate a pin control
by providing a table of pins, each pin being provided a list of
PXA_FUNCTION (alternate functions).

Signed-off-by: Robert Jarzmik 
Signed-off-by: Linus Walleij