ARM: mach-imx/mx31_3ds: Fix IOMUX for SPI1 signals

Original code was assuming that the CSPI1 pins on the
MX31PDK were the primary pin function, which is incorrect.

On MX31PDK board these are the pins that provide CSPI1 functionality:

DSR_DCE1 (ALT mode 1) --> CSPI1_CLK
RI_DCE1 (ALT mode 1) --> CSPI1_RDY

DTR_DTE1  -->CSI1_MOSI
DSR_DTE1 --> CSPI1_MISO
DTR_DCE2 ---> CSPI1_SS2

The 3 IOMUX settings above are done via GPR as per Table A-1 of the MX31RM.

This patch fixes the CSPI1 IOMUX and makes the LCD to be functional.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/mach-imx/mach-mx31_3ds.c b/arch/arm/mach-imx/mach-mx31_3ds.c
index ab2a6268b50ba73095547e55a53f580f17a0078c..1446b353af056c1824fc3a19a86514875631d5cd 100644 (file)
--- a/arch/arm/mach-imx/mach-mx31_3ds.c
+++ b/arch/arm/mach-imx/mach-mx31_3ds.c
@@ -53,11 +53,8 @@ static int mx31_3ds_pins[] = {
        MX31_PIN_RXD1__RXD1,
        IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO),
        /*SPI0*/
-       MX31_PIN_CSPI1_SCLK__SCLK,
-       MX31_PIN_CSPI1_MOSI__MOSI,
-       MX31_PIN_CSPI1_MISO__MISO,
-       MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
-       MX31_PIN_CSPI1_SS2__SS2, /* CS for LCD */
+       IOMUX_MODE(MX31_PIN_DSR_DCE1, IOMUX_CONFIG_ALT1),
+       IOMUX_MODE(MX31_PIN_RI_DCE1, IOMUX_CONFIG_ALT1),
        /* SPI 1 */
        MX31_PIN_CSPI2_SCLK__SCLK,
        MX31_PIN_CSPI2_MOSI__MOSI,
@@ -691,6 +688,9 @@ static void __init mx31_3ds_init(void)
 
        imx31_soc_init();
 
+       /* Configure SPI1 IOMUX */
+       mxc_iomux_set_gpr(MUX_PGP_CSPI_BB, true);
+
        mxc_iomux_setup_multiple_pins(mx31_3ds_pins, ARRAY_SIZE(mx31_3ds_pins),
                                      "mx31_3ds");