From f5c4eaba978cfc4ed76fa05f8ce49d7e2b05781e Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jackpot51@gmail.com>
Date: Wed, 10 May 2023 19:06:46 -0600
Subject: [PATCH] lemp12: hack to drain LDO_3V3 capacitors

---
 src/board/system76/lemp12/board.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/board/system76/lemp12/board.c b/src/board/system76/lemp12/board.c
index 7a154ac..dbd93df 100644
--- a/src/board/system76/lemp12/board.c
+++ b/src/board/system76/lemp12/board.c
@@ -28,4 +28,15 @@ void board_event(void) {
     espi_event();
 
     ec_read_post_codes();
+
+    // Hack to drain LDO_3V3 capacitors
+    if (!gpio_get(&XLP_OUT)) {
+        // These are pulled up by LDO_3V3, pull them low
+        // SMB_CLK_EC
+        GPCRC1 = GPIO_OUT;
+        // SMB_DATA_EC
+        GPCRC2 = GPIO_OUT;
+        // SMB_CLK_EC, SMB_DATA_EC
+        GPDRC &= ~(BIT(1) | BIT(2));
+    }
 }