linux.git/drivers/pinctrl/sirf, branch v4.2

pinctrl: make pinctrl_register() return proper error code

2015-06-10T12:49:52+00:00

Currently, pinctrl_register() just returns NULL on error, so the
callers can not know the exact reason of the failure.

Some of the pinctrl drivers return -EINVAL, some -ENODEV, and some
-ENOMEM on error of pinctrl_register(), although the error code
might be different from the real cause of the error.

This commit reworks pinctrl_register() to return the appropriate
error code and modifies all of the pinctrl drivers to use IS_ERR()
for the error checking and PTR_ERR() for getting the error code.

Signed-off-by: Masahiro Yamada 
Acked-by: Patrice Chotard 
Acked-by: Thierry Reding 
Acked-by: Heiko Stuebner 
Tested-by: Mika Westerberg 
Acked-by: Mika Westerberg 
Acked-by: Lee Jones 
Acked-by: Sören Brinkmann 
Acked-by: Laurent Pinchart 
Acked-by: Ray Jui 
Acked-by: Antoine Tenart 
Acked-by: Hongzhou Yang 
Acked-by: Wei Chen 
Signed-off-by: Linus Walleij

pinctrl: Remove .owner field

2015-06-04T08:12:42+00:00

platform_driver does not need to set the owner field, as it will be
populated by the driver core, so just remove it.

The semantic patch that makes this change is available
in scripts/coccinelle/api/platform_no_drv_owner.cocci.

Signed-off-by: Fabio Estevam 
Signed-off-by: Linus Walleij

pinctrl: sirf: add sirf atlas7 pinctrl and gpio support

2015-05-19T14:01:30+00:00

The Pinctrl module (ioc) controls the Pad's function select
(each pad can have 8 functions), Pad's Drive Strength, Pad's
Pull Select and Pad's Input Disable status.

The ioc has two modules, ioc_top & ioc_rtc. Both of these two
modules have function select/clear, Pull select and Drive
Strength registers. But only ioc_rtc has input-disable
registers. The Pads on ioc_top have to access ioc_rtc to set
their input-disable status and intpu-disable-value.

So have to use one ioc driver instance to drive these two
ioc modules at the same time, and each ioc module will be
treat as one bank on the "IOC Device".

The GPIO Controller controls the GPIO status if the Pad has
been config as GPIO by Pinctrl already. Includes the GPIO
Input/output, Interrupt type, Interrupt Status, and Set/Get
Values.
The GPIO pull up/down are controlled by Pinctrl.

There are 7 GPIO Groups and splited into 3 MACROs in atlas7.
The GPIO Groups in one MACRO share one GPIO controllers, each
GPIO Group are treated as one GPIO bank.

For example:
In VDIFM macro, there is one GPIO Controller, it has 3 banks
to control 3 gpio groups. Its gpio name space is from 0 to 95.

The Device Tree can be written as following:

gpio-ranges = <&pinctrl 0 0 0>,
<&pinctrl 32 0 0>,
<&pinctrl 64 0 0>;

gpio-ranges-group-names = "gnss_gpio_grp",
"lcd_vip_gpio_grp",
"sdio_i2s_gpio_grp";

bank#0 is from 0~31, the pins are from pinctrl's "gnss_gpio_grp".
bank#2 is from 32~63, the pins are from pinctrl's "lcd_vip_gpio_grp".
bank#3 is from 64~95, the pins are from pinctrl's "sdio_i2s_gpio_grp".

Signed-off-by: Wei Chen 
Signed-off-by: Barry Song 
Signed-off-by: Linus Walleij

pinctrl: sirf: move sgpio lock into state container

2015-04-09T08:16:13+00:00

Instead of referring to a global static variable for the sgpio
locking, use the state container to contain the lock.

Signed-off-by: Linus Walleij

pinctrl: sirf: fix typo in kernel warning on a bad interrupt

2015-03-09T17:10:59+00:00

Fix typo, "flaged" -> "flagged"

Signed-off-by: Colin Ian King 
Signed-off-by: Linus Walleij

pinctrl: sirf: drop marco support

2015-01-14T13:21:54+00:00

marco chip has been dropped, clear its support.

Signed-off-by: Barry Song 
Signed-off-by: Linus Walleij

pinctrl: sirf: drop owner assignment from platform_drivers

2014-10-20T14:21:24+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

Merge tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

2014-10-09T18:58:15+00:00

Pull GPIO changes from Linus Walleij:
 "This is the bulk of GPIO changes for the v3.18 development cycle:

   - Increase the default ARCH_NR_GPIO from 256 to 512.  This was done
     to avoid having a custom  header for the x86
     architecture - GPIO is custom and complicated enough as it is
     already! We want to move to a radix to store the descriptors going
     forward, and finally get rid of this fixed array size altogether.

   - Endgame patching of the gpio_remove() semantics initiated by
     Abdoulaye Berthe.  It is not accepted by the system that the
     removal of a GPIO chip fails during eg reboot or shutdown, and
     therefore the return value has now painfully been refactored away.
     For special cases like GPIO expanders on a hot-pluggable bus like
     USB, we may later add some gpiochip_try_remove() call, but for the
     cases we have now, return values are moot.

   - Some incremental refactoring of the gpiolib core and ACPI GPIO
     library for more descriptor usage.

   - Refactor the chained IRQ handler set-up method to handle also
     threaded, nested interrupts and set up the parent IRQ correctly.
     Switch STMPE and TC3589x drivers to use this registration method.

   - Add a .irq_not_threaded flag to the struct gpio_chip, so that also
     GPIO expanders that block but are still not using threaded IRQ
     handlers.

   - New drivers for the ARM64 X-Gene SoC GPIO controller.

   - The syscon GPIO driver has been improved to handle the "DSP GPIO"
     found on the TI Keystone 2 SoC:s.

   - ADNP driver switched to use gpiolib irqchip helpers.

   - Refactor the DWAPB driver to support being instantiated from and
     MFD cell (platform device).

   - Incremental feature improvement in the Zynq, MCP23S08, DWAPB, OMAP,
     Xilinx and Crystalcove drivers.

   - Various minor fixes"

* tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (52 commits)
  gpio: pch: Build context save/restore only for PM
  pinctrl: abx500: get rid of unused variable
  gpio: ks8695: fix 'else should follow close brace '}''
  gpio: stmpe: add verbose debug code
  gpio: stmpe: fix up interrupt enable logic
  gpio: staticize xway_stp_init()
  gpio: handle also nested irqchips in the chained handler set-up
  gpio: set parent irq on chained handlers
  gpiolib: irqchip: use irq_find_mapping while removing irqchip
  gpio: crystalcove: support virtual GPIO
  pinctrl: bcm281xx: make Kconfig dependency more strict
  gpio: kona: enable only on BCM_MOBILE or for compile testing
  gpio, bcm-kona, LLVMLinux: Remove use of __initconst
  gpio: Fix ngpio in gpio-xilinx driver
  gpio: dwapb: fix pointer to integer cast
  gpio: xgene: Remove unneeded #ifdef CONFIG_OF guard
  gpio: xgene: Remove unneeded forward declation for struct xgene_gpio
  gpio: xgene: Fix missing spin_lock_init()
  gpio: ks8695: fix switch case indentation
  gpiolib: add irq_not_threaded flag to gpio_chip
  ...

pinctrl: remove remaining users of gpiochip_remove() retval

2014-09-23T15:51:12+00:00

Some drivers accidentally still use the return value from
gpiochip_remove(). Get rid of them so we can simplify this function
and get rid of the return value.

Cc: Abdoulaye Berthe 
Signed-off-by: Linus Walleij

pinctrl: prima2: add I2S 2ch, 6ch, nodin, mclk groups

2014-09-04T17:07:19+00:00

we have done that for atlas6 in commit ed36c1a, 086b8904 etc. here we
do same things for prima2.

Signed-off-by: Rongjun Ying 
Signed-off-by: Barry Song 
Signed-off-by: Linus Walleij