Hello David,
>>i.MX7ULP is it possible to access the PMU interrupts?
yes, it is possible.
>>How should this be done?
On i.MX7ULP EVK schematic, PMIC_INT is connected ot PTB11(Port B No.11 pin), see below, please!
The pin has been defined GPIO in imx7ulp-pinfunc.h
#define IMX7ULP_PAD_PTB11__PTB11 0x00AC 0x0000 0x1 0x0
If you want A7 to response it's interrupt in linux BSP, you should use the "Table 3-2. A7 interrupt assignments"
68 is IRQ number.
For detailed information on how to : Referring to interrupt of MIPI_DSI to HDMI .
pinctrl_dsi_hdmi: dsi_hdmi_grp {
fsl,pins = <
IMX7ULP_PAD_PTC18__PTC18 0x10003 /* DSI_HDMI_INT */
>;
};
};
--------------Reminder-----------
[Comment] Pay attention to configurations on PORT A/B/C/D..., voltage range is a little difference.
See reference manual, please!
31.4 GPIO pads operating range configuration
......
GPIO pads can operate in 3 ranges of I/O supply:
• 1.8 V range (1.71 V ~ 1.89 V)
• 3.3 V range (3.00 V ~ 3.60 V)
• Continuous range (1.71 V ~ 3.60 V)
• Ports A, C, E, F GPIO pads must be configured to operate in one of the 3 possible
operating ranges.
• Port B GPIO pads must be configured to operate in either "Continuous range" or in
"1.8 V range".
• Port D GPIO pads are not configurable and can operate in "1.8 V range" or "3.3 V
range".
• Each GPIO port can be individually configured in the SIM_DGO_GP11 register
according to the values shown in the following table.
• Operating in the "Continuous range" turns on a voltage detection circuitry resulting
in additional power consumption. If this additional power consumption is not
desired, for example in low power modes, it's recommended to configure either Low
or High range.
......--------------------------
Have a nice day!
BR,
Weidong
Hi again Weidong,
I'm familiar with the kernel configuration options needed and the device tree entries, my question is regarding the missing interrupt parameters in the PMU section of the device tree source file provided for the i.MX7ULP.
In the article you linked the device tree entry is:
But in arch/arm/boot/dts/imx7ulp.dtsi:
No interrupts are specified, as I said in my original question, I have tried to find information in the reference manual for the i.MX7ULP - the PMU IRQ doesn't seem to be available at the GIC (Generic Interrupt Controller) as it is on other i.MX platforms, but I saw some information that it might be possible to route the PMU interrupt to the CTI interrupt (which is connected to the GIC)?
Would this be possible, and is this the way it should be done to get access to the PMU IRQs or are they exposed in some other way?
Best Regards,
David
