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d006af40 AF |
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 |