arch/arm/include/asm/arch-tegra20/uart-spi-switch.h

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  * See file CREDITS for list of people who contributed to this
   4  * project.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  19  * MA 02111-1307 USA
  20  */
  21
  22 #ifndef _UART_SPI_SWITCH_H
  23 #define _UART_SPI_SWITCH_H
  24
  25 #if defined(CONFIG_SPI_UART_SWITCH)
  26 /*
  27  * Signal that we are about to use the UART. This unfortunate hack is
  28  * required by Seaboard, which cannot use its console and SPI at the same
  29  * time! If the board file provides this, the board config will declare it.
  30  * Let this be a lesson for others.
  31  */
  32 void pinmux_select_uart(void);
  33
  34 /*
  35  * Signal that we are about the use the SPI bus.
  36  */
  37 void pinmux_select_spi(void);
  38
  39 #else /* not CONFIG_SPI_UART_SWITCH */
  40
  41 static inline void pinmux_select_uart(void) {}
  42 static inline void pinmux_select_spi(void) {}
  43
  44 #endif
  45
  46 #endif