reset: add reset controller driver for STM32 RCC ...

On the STM32MP, reset of the I2C, SPI and USB IPs occurs over the RCC.
This driver adds support for the controller, so it may be reused by
other drivers.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

reset: Add i.MX7 SRC reset driver ...

Port of a Linux commit abf9775

  Add reset controller driver exposing various reset faculties,
  implemented by System Reset Controller IP block.

  Cc: Lucas Stach <l.stach@pengutronix.de>
  Cc: Mark Rutland <mark.rutland@arm.com>
  Cc: devicetree@vger.kernel.org
  Cc: linux-kernel@vger.kernel.org
  Cc: linux-arm-kernel@lists.infradead.org
  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  Acked-by: Rob Herring <robh@kernel.org>
  Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Linux commit 26fce05 was squashed
here as well:

  reset: imx7: Fix always writing bits as 0

  Right now the only user of reset-imx7 is pci-imx6 and the
  reset_control_assert and deassert calls on pciephy_reset don't toggle
  the PCIEPHY_BTN and PCIEPHY_G_RST bits as expected. Fix this by writing
  1 or 0 respectively.

  The reference manual is not very clear regarding SRC_PCIEPHY_RCR but for
  other registers like MIPIPHY and HSICPHY the bits are explicitly
  documented as "1 means assert, 0 means deassert".

  The values are still reversed for IMX7_RESET_PCIE_CTRL_APPS_EN.

  Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
  Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

reset: import socfpga-reset driver from linux ...

Port the linux v4.8-rc1 reset-socfpga driver to barebox.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

reset: add reset controller framework ...

Add stripped sown version of the reset controller
framework from the Linux kernel.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>