From c053723cc5a73781a4954e6c93d280436623e3d6 Mon Sep 17 00:00:00 2001 From: Jason Kridner Date: Wed, 21 Jul 2010 07:41:25 -0500 Subject: [PATCH] BeagleBoard: Added userbutton command Based on commit f1099c7c43caf5bac3bf6a65aa266fade4747072 Author: Greg Turner 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 #include #include "beagle.h" +#include 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