From c553484f2e5a74af00a669ea4d049c0b35751d0f Mon Sep 17 00:00:00 2001
From: gtxaspec <gtxent@gmail.com>
Date: Sun, 21 Jan 2024 04:00:03 -0800
Subject: [PATCH] add env to disable sd card operations at boot

---
 arch/mips/lib/board.c         | 10 ++++++++++
 include/configs/isvp_common.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/arch/mips/lib/board.c b/arch/mips/lib/board.c
index 28313cee..42bcf33d 100644
--- a/arch/mips/lib/board.c
+++ b/arch/mips/lib/board.c
@@ -405,6 +405,12 @@ handle_gpio_settings("gpio_user");
 handle_gpio_settings("gpio_motor_v");
 handle_gpio_settings("gpio_motor_h");
 
+// Try to get the value of the 'sd_present' environment variable
+char* sd_present = getenv("sd_present");
+
+// Check if 'sd_present' was found and compare its value
+if (sd_present != NULL && strcmp(sd_present, "true") == 0) {
+	// The environment variable 'sd_present' exists and its value is "true"
 #ifdef CONFIG_AUTO_UPDATE
 	printf("Autoupdate... \n");
 	run_command("sdupdate",0);
@@ -412,6 +418,10 @@ handle_gpio_settings("gpio_motor_h");
 #ifdef CONFIG_CMD_SDSTART
 	run_command("sdstart",0);
 #endif
+} else {
+	// 'sd_present' does not exist or is not "true"
+	printf("SD card disabled\n");
+}
 
 	/* main_loop() can return to retry autoboot, if so just run it again. */
 	for (;;)
diff --git a/include/configs/isvp_common.h b/include/configs/isvp_common.h
index e6eb7595..8cc84cc0 100644
--- a/include/configs/isvp_common.h
+++ b/include/configs/isvp_common.h
@@ -265,6 +265,7 @@
 "panic_timeout=10\0" \
 "serialport=ttyS1\0" \
 "restore=n\0" \
+"sd_present=true\0" \
 "soc="CONFIG_SOC"\0" \
 CONFIG_EXTRA_SETTINGS \
 CONFIG_GPIO_SETTINGS \