Based on commit f1099c7c43caf5bac3bf6a65aa266fade4747072
Author: Greg Turner <gregtur...@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.
* Used latest revision getting function.
* Used latest macros for board revision.
--
v2 update:
* Added xM-C revision definition (optional, since it was default)
Signed-off-by: Jason Kridner <jkrid...@beagleboard.org>
---
board/ti/beagle/beagle.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 56 insertions(+), 0 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index 7768901..2e27aef 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -50,6 +50,7 @@ extern struct ehci_hccr *hccr;
extern volatile struct ehci_hcor *hcor;
#endif
#include "beagle.h"
+#include <command.h>
#define pr_debug(fmt, args...) debug(fmt, ##args)
@@ -440,3 +441,58 @@ int ehci_hcd_init(void)
}
#endif /* CONFIG_USB_EHCI */
+
+/*
+ * 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 (get_board_revision()) {
+ case REVISION_AXBX:
+ case REVISION_CX:
+ case REVISION_C4:
+ gpio = 7;
+ break;
+ case REVISION_XM_A:
+ case REVISION_XM_B:
+ case REVISION_XM_C:
+ 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",
+ ""
+);
--
1.5.6.4
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