ARM: add support for the EET board, based on the i.MX31 pcm037 module

The "EET" variant of the pcm037 board has an OLED display, using a S6E63D6
display controller on the first SPI interface, using GPIO57 as a chip-select
for it. S6E63D6 is initialised in the boot-loader, so we only have to take care
of the LCD. EET also adds several buttons and LEDs on GPIOs. This patch adds a
"pcm037_variant=" kernel command line parameter to specify at boot-time which
board the kernel is running on, default is "pcm970", specify "eet" for the EET
board.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 59 insertions, 6 deletions

diff --git a/arch/arm/mach-mx3/pcm037.c b/arch/arm/mach-mx3/pcm037.c
index d7b29b724a61..840cfda341d0 100644
--- a/arch/arm/mach-mx3/pcm037.c
+++ b/arch/arm/mach-mx3/pcm037.c
@@ -52,6 +52,41 @@
 #include <mach/mxc_nand.h>
 
 #include "devices.h"
+#include "pcm037.h"
+
+static enum pcm037_board_variant pcm037_instance = PCM037_PCM970;
+
+static int __init pcm037_variant_setup(char *str)
+{
+        if (!strcmp("eet", str))
+                pcm037_instance = PCM037_EET;
+        else if (strcmp("pcm970", str))
+                pr_warning("Unknown pcm037 baseboard variant %s\n", str);
+
+        return 1;
+}
+
+/* Supported values: "pcm970" (default) and "eet" */
+__setup("pcm037_variant=", pcm037_variant_setup);
+
+enum pcm037_board_variant pcm037_variant(void)
+{
+        return pcm037_instance;
+}
+
+/* UART1 with RTS/CTS handshake signals */
+static unsigned int pcm037_uart1_handshake_pins[] = {
+        MX31_PIN_CTS1__CTS1,
+        MX31_PIN_RTS1__RTS1,
+        MX31_PIN_TXD1__TXD1,
+        MX31_PIN_RXD1__RXD1,
+};
+
+/* UART1 without RTS/CTS handshake signals */
+static unsigned int pcm037_uart1_pins[] = {
+        MX31_PIN_TXD1__TXD1,
+        MX31_PIN_RXD1__RXD1,
+};
 
 static unsigned int pcm037_pins[] = {
         /* I2C */
@@ -76,11 +111,6 @@ static unsigned int pcm037_pins[] = {
         MX31_PIN_CSPI1_SS0__SS0,
         MX31_PIN_CSPI1_SS1__SS1,
         MX31_PIN_CSPI1_SS2__SS2,
-        /* UART1 */
-        MX31_PIN_CTS1__CTS1,
-        MX31_PIN_RTS1__RTS1,
-        MX31_PIN_TXD1__TXD1,
-        MX31_PIN_RXD1__RXD1,
         /* UART2 */
         MX31_PIN_TXD2__TXD2,
         MX31_PIN_RXD2__RXD2,
@@ -459,6 +489,22 @@ static const struct fb_videomode fb_modedb[] = {
                 .sync           = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
                 .vmode          = FB_VMODE_NONINTERLACED,
                 .flag           = 0,
+        }, {
+                /* 240x320 @ 60 Hz */
+                .name           = "CMEL-OLED",
+                .refresh        = 60,
+                .xres           = 240,
+                .yres           = 320,
+                .pixclock       = 185925,
+                .left_margin    = 9,
+                .right_margin   = 16,
+                .upper_margin   = 7,
+                .lower_margin   = 9,
+                .hsync_len      = 1,
+                .vsync_len      = 1,
+                .sync           = FB_SYNC_OE_ACT_HIGH | FB_SYNC_CLK_INVERT,
+                .vmode          = FB_VMODE_NONINTERLACED,
+                .flag           = 0,
         },
 };
 
@@ -479,6 +525,14 @@ static void __init mxc_board_init(void)
         mxc_iomux_setup_multiple_pins(pcm037_pins, ARRAY_SIZE(pcm037_pins),
                         "pcm037");
 
+        if (pcm037_variant() == PCM037_EET)
+                mxc_iomux_setup_multiple_pins(pcm037_uart1_pins,
+                        ARRAY_SIZE(pcm037_uart1_pins), "pcm037_uart1");
+        else
+                mxc_iomux_setup_multiple_pins(pcm037_uart1_handshake_pins,
+                        ARRAY_SIZE(pcm037_uart1_handshake_pins),
+                        "pcm037_uart1");
+
         platform_add_devices(devices, ARRAY_SIZE(devices));
 
         mxc_register_device(&mxc_uart_device0, &uart_pdata);
@@ -542,4 +596,3 @@ MACHINE_START(PCM037, "Phytec Phycore pcm037")
         .init_machine   = mxc_board_init,
         .timer          = &pcm037_timer,
 MACHINE_END
-