Difference between revisions of "Jetson/FAQ/BSP/Xavier Wakeup Pin"
(Created page with "= Environment = == Hardware == * Jetson Xavier == Software == * JetPack 4.4 (32.4.3) = Use case = Set GPIO(STB_REQ_N/Pin L11) as wake up source to trigger OS resume. = Steps =...") |
(→Create GPIO key to trigger wake up signal) |
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| Line 11: | Line 11: | ||
== Create GPIO key to trigger wake up signal == | == Create GPIO key to trigger wake up signal == | ||
Add following node to hardware/nvidia/platform/t19x/galen/kernel-dts/common/tegra194-p2822-0000-a00.dtsi. | Add following node to hardware/nvidia/platform/t19x/galen/kernel-dts/common/tegra194-p2822-0000-a00.dtsi. | ||
| − | @@ -16,7 +16,7 @@ | + | * @@ -16,7 +16,7 @@ |
| − | #include "dt-bindings/input/input.h" | + | * #include "dt-bindings/input/input.h" |
| − | #include "tegra194-audio-p2822-0000.dtsi" | + | * #include "tegra194-audio-p2822-0000.dtsi" |
| − | #include "tegra194-p2822-disp.dtsi" | + | * #include "tegra194-p2822-disp.dtsi" |
| − | - | + | * - |
| − | +#include <dt-bindings/soc/tegra-pmc.h> | + | * +#include <dt-bindings/soc/tegra-pmc.h> |
| − | / { | + | * / { |
| − | sdhci@3400000 { | + | * sdhci@3400000 { |
| − | mmc-ocr-mask = <0x0>; | + | * mmc-ocr-mask = <0x0>; |
| − | @@ -43,4 +43,16 @@ | + | * @@ -43,4 +43,16 @@ |
| − | gpio-key,wakeup; | + | * gpio-key,wakeup; |
| − | }; | + | * }; |
| − | }; | + | * }; |
| − | + | + | * + |
| − | + gpio-keys { | + | * + gpio-keys { |
| − | + wakeup_key { | + | * + wakeup_key { |
| − | + label = "WakeupKey"; | + | * + label = "WakeupKey"; |
| − | + gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(G, 1) GPIO_ACTIVE_LOW>; | + | * + gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(G, 1) GPIO_ACTIVE_LOW>; |
| − | + linux,code = <KEY_SUSPEND>; | + | * + linux,code = <KEY_SUSPEND>; |
| − | + gpio-key,wakeup; | + | * + gpio-key,wakeup; |
| − | + debounce-interval = <30>; | + | * + debounce-interval = <30>; |
| − | + nvidia,pmc-wakeup = <&tegra_pmc | + | * + nvidia,pmc-wakeup = <&tegra_pmc |
| − | + PMC_WAKE_TYPE_GPIO 68 PMC_TRIGGER_TYPE_HIGH>; | + | * + PMC_WAKE_TYPE_GPIO 68 PMC_TRIGGER_TYPE_HIGH>; |
| − | + }; | + | * + }; |
| − | + }; | + | * + }; |
| − | }; | + | * }; |
Note:<br> | Note:<br> | ||
Revision as of 18:29, 24 January 2021
Contents
Environment
Hardware
- Jetson Xavier
Software
- JetPack 4.4 (32.4.3)
Use case
Set GPIO(STB_REQ_N/Pin L11) as wake up source to trigger OS resume.
Steps
Note: All changes are in kernel device tree.
Create GPIO key to trigger wake up signal
Add following node to hardware/nvidia/platform/t19x/galen/kernel-dts/common/tegra194-p2822-0000-a00.dtsi.
- @@ -16,7 +16,7 @@
- #include "dt-bindings/input/input.h"
- #include "tegra194-audio-p2822-0000.dtsi"
- #include "tegra194-p2822-disp.dtsi"
- -
- +#include <dt-bindings/soc/tegra-pmc.h>
- / {
- sdhci@3400000 {
- mmc-ocr-mask = <0x0>;
- @@ -43,4 +43,16 @@
- gpio-key,wakeup;
- };
- };
- +
- + gpio-keys {
- + wakeup_key {
- + label = "WakeupKey";
- + gpios = <&tegra_main_gpio TEGRA194_MAIN_GPIO(G, 1) GPIO_ACTIVE_LOW>;
- + linux,code = <KEY_SUSPEND>;
- + gpio-key,wakeup;
- + debounce-interval = <30>;
- + nvidia,pmc-wakeup = <&tegra_pmc
- + PMC_WAKE_TYPE_GPIO 68 PMC_TRIGGER_TYPE_HIGH>;
- + };
- + };
- };
Note:
(1) Pay attention of nvidia,pmc-wakeup property, the number 68 means wake up ID of Nano. You can find this ID from Column Y of Xavier_Module_Pinmux_Config file which comes from Jetson Download Center.
(2) If you want a key for suspend purpose, please modify linux,code propriety's value as <KEY_SUSPEND>.
Verification
Re-build device tree and re-flash to Xavier. After boot completed, exec "sudo systemctl suspend" to suspend OS. Connect that Pin and debug STB_REQ_N/Pin L11 via Dupont wire to wake up OS.
