commit 05e8ea8e3c834f2bd029647930dd8c139486bada
author Renze Nicolai <renze@rnplus.nl> Thu Jul 04 00:46:16 2024 +0200
committer Jason M. Bills <jason.m.bills@linux.intel.com> Fri Oct 25 13:20:10 2024 -0700
tree 9302bce066d05d03409ca4ebe28be78ea6871b0c
parent c6d756565e5e88656ac58d518347d43f1052ed58

x86-power-control: add passthrough option

Add a power and reset button passthrough option
for emulating button behavior by directly controlling
the control output pin.

Change-Id: I50df3e604401b4afd43fa89a0709466bbf01638b
Signed-off-by: Renze Nicolai <renze@rnplus.nl>

meson.build

diff --git a/meson.build b/meson.build
index 6117245..80eeed6 100644
--- a/meson.build
+++ b/meson.build
@@ -35,6 +35,9 @@
 if get_option('ignore-soft-resets-during-post').allowed()
   cpp_args += '-DIGNORE_SOFT_RESETS_DURING_POST'
 endif
+if get_option('button-passthrough').allowed()
+  cpp_args += '-DUSE_BUTTON_PASSTHROUGH'
+endif
 
 deps = [
   dependency('libgpiodcxx', default_options: ['bindings=cxx']),

meson.options

diff --git a/meson.options b/meson.options
index c32fd30..07adb15 100644
--- a/meson.options
+++ b/meson.options
@@ -6,3 +6,5 @@
        description: 'Use hardware Reset Reason to control Power Restore. Note: this only works with Intel-BMC')
 option('ignore-soft-resets-during-post', type: 'feature', value : 'disabled',
        description: 'Ignore soft resets from host during POST')
+option('button-passthrough', type: 'feature', value : 'disabled',
+       description: 'Directly couple through power and reset buttons')

src/power_control.cpp

diff --git a/src/power_control.cpp b/src/power_control.cpp
index b020309..0fd422d 100644
--- a/src/power_control.cpp
+++ b/src/power_control.cpp
@@ -2067,6 +2067,16 @@
             lg2::info("power button press masked");
         }
     }
+#if USE_BUTTON_PASSTHROUGH
+    gpiod::line gpioLine;
+    bool outputState =
+        asserted ? powerOutConfig.polarity : (!powerOutConfig.polarity);
+    if (!setGPIOOutput(powerOutConfig.lineName, outputState, gpioLine))
+    {
+        lg2::error("{GPIO_NAME} power button passthrough failed", "GPIO_NAME",
+                   powerOutConfig.lineName);
+    }
+#endif
 }
 
 static void resetButtonHandler(bool state)
@@ -2086,6 +2096,16 @@
             lg2::info("reset button press masked");
         }
     }
+#if USE_BUTTON_PASSTHROUGH
+    gpiod::line gpioLine;
+    bool outputState =
+        asserted ? resetOutConfig.polarity : (!resetOutConfig.polarity);
+    if (!setGPIOOutput(resetOutConfig.lineName, outputState, gpioLine))
+    {
+        lg2::error("{GPIO_NAME} reset button passthrough failed", "GPIO_NAME",
+                   resetOutConfig.lineName);
+    }
+#endif
 }
 
 #ifdef CHASSIS_SYSTEM_RESET