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b5db0a068a
gpio_free() should not have the side effect of setting the line to input since this prevents the gpio command from being able to set a line as output. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Cc: Joe Hershberger <joe.hershberger@gmail.com> Cc: Sandeep Paulraj <s-paulraj@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* Copyright (c) 2009 Wind River Systems, Inc.
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* Tom Rix <Tom.Rix@windriver.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <asm/arch/cpu.h>
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#include <asm/io.h>
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#include <asm/arch/mux.h>
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#include <asm/gpio.h>
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#define DEBUG_BOARD_CONNECTED 1
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#define DEBUG_BOARD_NOT_CONNECTED 0
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static int debug_board_connected = DEBUG_BOARD_CONNECTED;
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static void zoom2_debug_board_detect (void)
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{
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int val = 0;
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if (!gpio_request(158, "")) {
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/*
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* GPIO to query for debug board
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* 158 db board query
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*/
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gpio_direction_input(158);
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val = gpio_get_value(158);
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}
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if (!val)
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debug_board_connected = DEBUG_BOARD_NOT_CONNECTED;
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}
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int zoom2_debug_board_connected (void)
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{
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static int first_time = 1;
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if (first_time) {
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zoom2_debug_board_detect ();
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first_time = 0;
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}
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return debug_board_connected;
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}
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