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dev_err_probe() can reduce code size, uniform error handling and record the
defer probe reason etc., use it to simplify the code.
Signed-off-by: Anson Huang <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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Gcc report warning as follows:
drivers/irqchip/irq-imx-intmux.c:316:29: warning:
variable 'irqchip_data' set but not used [-Wunused-but-set-variable]
316 | struct intmux_irqchip_data irqchip_data;
| ^~~~~~~~~~~~
irqdata regs is stored to this variable on the stack in
imx_intmux_runtime_suspend(), which means a nop. this commit
fix to save regs to the right place.
Fixes: bb403111e017 ("irqchip/imx-intmux: Implement intmux runtime power management")
Reported-by: Hulk Robot <[email protected]>
Signed-off-by: Wei Yongjun <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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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 <[email protected]>
[maz: revamped commit message]
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.
This code was detected with the help of Coccinelle and, audited and
fixed manually.
Signed-off-by: Gustavo A. R. Silva <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/20200616230923.GA24937@embeddedor
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The Interrupt Multiplexer (INTMUX) expands the number of peripherals
that can interrupt the core:
* The INTMUX has 8 channels that are assigned to 8 NVIC interrupt slots.
* Each INTMUX channel can receive up to 32 interrupt sources and has 1
interrupt output.
* The INTMUX routes the interrupt sources to the interrupt outputs.
Signed-off-by: Shengjiu Wang <[email protected]>
Signed-off-by: Joakim Zhang <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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