Commit Graph

5 Commits

Author SHA1 Message Date
Maxime Ripard 1bee963db9 pinctrl: sunxi: Add spinlocks
The current code use no locking at all, which is obviously not that
great and can lead to concurrency issues, especially with the newer SMP
SoCs from Allwinner.

Add some locking where it's needed.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2013-08-07 21:57:17 +02:00
Maxime Ripard 60242db1a7 pinctrl: sunxi: Add external interrupts support
The port controller IP found in the Allwinner A10 and A13 can use few of
the pins it manage as an interrupt source, called external interrupts in
the datasheet.

The number of these external interrupts are SoCs specific, but the
current upper limit is 32. In order to work, the external interrupts'
pins have to be muxed to a specific function to generate an interrupt.

This patch adds the irqchip and the needed logic to use the PIO
controller as an interrupt controller.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-16 11:57:31 +02:00
Maxime Ripard 9f5b6b30f9 ARM: pinctrl: sunxi: Add the pinctrl pin set for Allwinner A10
Since the Allwinner SoCs variants don't have the same set of pins to
handle, we need to declare the pin ranges available.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-02-01 10:45:34 +01:00
Maxime Ripard 08e9e614ca ARM: sunxi: gpio: Add Allwinner SoCs GPIO drivers
The IP responsible for the muxing on the Allwinner SoCs are also
handling the GPIOs on the system. This patch adds the needed driver that
relies on the pinctrl driver for most of its operations.

The number of pins available for GPIOs operations are already declared
in the pinctrl driver, we only need to probe a generic driver to handle
the banks available for each SoC.

This driver has been tested on a A13-Olinuxino.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-01-29 23:37:16 +01:00
Maxime Ripard 0e37f88d9a ARM: sunxi: Add pinctrl driver for Allwinner SoCs
The Allwinner SoCs have an IP module that handle both the muxing and the
GPIOs.

This IP has 8 banks of 32 bits, with a number of pins actually useful
for each of these banks varying from one to another, and depending on
the SoC used on the board.

This driver only implements the pinctrl part, the gpio part will come
eventually.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-01-22 13:51:15 +01:00