src/patches/kernel/omap/panda/0011-panda-spidev-setup-pinmux.patch

   1 From 9f5066a898b77f2fe2b1f0946bb6afebe3d08f6d Mon Sep 17 00:00:00 2001
   2 From: Yann <yann.wanwanscappel@free.fr>
   3 Date: Sat, 8 Jun 2013 13:06:37 -0500
   4 Subject: [PATCH 7/7] panda: spidev: setup pinmux
   5
   6 It works fine on my board, I've been able to perform data transfers using the spidev_test program provided in kernel documentation
   7 (shortcut between SIMO and SOMI to perform an hardware loopback). I also checked that CS0 and CS1 and CLK are properly driven using my scope.
   8
   9 The clock is strangely configured as input, but it is also the case for omap3 beagle board, so I guess this is fine.
  10
  11 Signed-off-by: Yann <yann.wanwanscappel@free.fr>
  12 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
  13 ---
  14  arch/arm/mach-omap2/board-omap4panda.c |   13 ++++++++++++-
  15  1 file changed, 12 insertions(+), 1 deletion(-)
  16
  17 diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
  18 index 3563f86..10bb576 100644
  19 --- a/arch/arm/mach-omap2/board-omap4panda.c
  20 +++ b/arch/arm/mach-omap2/board-omap4panda.c
  21 @@ -103,6 +103,16 @@ static struct platform_device leds_gpio = {
  22         },
  23  };
  24
  25 +static void __init omap4_panda_config_mcspi1_mux(void)
  26 +{
  27 +       /* NOTE: Clock pins need to be in input mode */
  28 +       omap_mux_init_signal("mcspi1_clk", OMAP_PIN_INPUT);
  29 +       omap_mux_init_signal("mcspi1_simo", OMAP_PIN_OUTPUT);
  30 +       omap_mux_init_signal("mcspi1_somi", OMAP_PIN_INPUT_PULLUP);
  31 +       omap_mux_init_signal("mcspi1_cs0", OMAP_PIN_OUTPUT);
  32 +       omap_mux_init_signal("mcspi1_cs1", OMAP_PIN_OUTPUT);
  33 +}
  34 +
  35  static struct spi_board_info panda_mcspi_board_info[] = {
  36         /* spi 1.0 */
  37         {
  38 @@ -472,7 +482,8 @@ static void __init omap4_panda_init(void)
  39         omap4_ehci_init();
  40         if (!strcmp(expboard_name, "spidev")) {
  41         #if IS_ENABLED(CONFIG_SPI_SPIDEV)
  42 -               pr_info("Panda expansionboard: spidev: enabling spi3/spi4\n");
  43 +               pr_info("Panda expansionboard: spidev: enabling spi1.0 and spi1.1\n");
  44 +               omap4_panda_config_mcspi1_mux();
  45                 spi_register_board_info(panda_mcspi_board_info, ARRAY_SIZE(panda_mcspi_board_info));
  46         #endif
  47         }
  48 --
  49 1.7.10.4
  50