]> git.baikalelectronics.ru Git - kernel.git/commit
irqchip/imx-intmux: Implement intmux runtime power management
authorJoakim Zhang <qiangqing.zhang@nxp.com>
Mon, 27 Jul 2020 14:17:34 +0000 (22:17 +0800)
committerMarc Zyngier <maz@kernel.org>
Mon, 27 Jul 2020 07:55:05 +0000 (08:55 +0100)
commit64552b6419599cdfd06f6b281fe27155a2f6162a
treecfb34ea100b0f12182c7be577cc2eca8e8510125
parent6286cc0703e5fe6880cebd6a0dd6c343fd89f83d
irqchip/imx-intmux: Implement intmux runtime power management

When the system is suspended, we can explicitly disable clock to save
power. To achieve this, we need save registers' state since it could be
lost after power off.

Implement power management which will:
- Turn the clock off after probing
- Disable clock and save registers' state on system suspend, as
  well as enable clock and restore registers' state on resume
- Rely on the Power Domain framework to shutdown the intmux
  power domain

Without CONFIG_PM, the clock is always on after probe stage.

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
[maz: revamped commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200727141734.24890-2-qiangqing.zhang@nxp.com
drivers/irqchip/irq-imx-intmux.c