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From c053723cc5a73781a4954e6c93d280436623e3d6 Mon Sep 17 00:00:00 2001
From: Jason Kridner <jkridner@beagleboard.org>
Date: Wed, 21 Jul 2010 07:41:25 -0500
Subject: [PATCH] BeagleBoard: Added userbutton command
Based on commit f1099c7c43caf5bac3bf6a65aa266fade4747072
Author: Greg Turner <gregturner@ti.com>
Date: Tue May 25 09:19:06 2010 -0500
New u-boot command for status of USER button on BeagleBoard-xM
Modified bootcmd to check the staus at boot time and set
filename of the boot script.
* Moved to a BeagleBoard specific file.
* Removed changes to default boot command from adding userbutton
command.
* Made to handle pre-xM boards.
* Flipped polarity of the return value to avoid confusion. Success (0)
is when the button is pressed. Failure (1) is when the button is NOT
pressed.
---
board/ti/beagle/beagle.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 54 insertions(+), 0 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index a6a4961..66df719 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -40,6 +40,7 @@
#include <asm/arch/gpio.h>
#include <asm/mach-types.h>
#include "beagle.h"
+#include <command.h>
static struct {
unsigned int device_vendor;
@@ -290,3 +291,56 @@ void set_muxconf_regs(void)
MUX_BEAGLE();
}
+/*
+ * This command returns the status of the user button on beagle xM
+ * Input - none
+ * Returns - 1 if button is held down
+ * 0 if button is not held down
+ */
+int do_userbutton (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ int button = 0;
+ int gpio;
+
+ /*
+ * pass address parameter as argv[0] (aka command name),
+ * and all remaining args
+ */
+ switch (beagle_revision) {
+ case REVISION_AXBX:
+ case REVISION_CX:
+ case REVISION_C4:
+ gpio = 7;
+ break;
+ case REVISION_XM:
+ default:
+ gpio = 4;
+ break;
+ }
+ omap_request_gpio(gpio);
+ omap_set_gpio_direction(gpio, 1);
+ printf("The user button is currently ");
+ if(omap_get_gpio_datain(gpio))
+ {
+ button = 1;
+ printf("PRESSED.\n");
+ }
+ else
+ {
+ button = 0;
+ printf("NOT pressed.\n");
+ }
+
+ omap_free_gpio(gpio);
+
+ return !button;
+}
+
+/* -------------------------------------------------------------------- */
+
+U_BOOT_CMD(
+ userbutton, CONFIG_SYS_MAXARGS, 1, do_userbutton,
+ "Return the status of the BeagleBoard USER button",
+ ""
+);
+
--
1.6.1
|
