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, 204 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/pcm037_eet.c b/arch/arm/mach-mx3/pcm037_eet.c
new file mode 100644
index 0000000..fe52fb1
--- /dev/null
+++ b/arch/arm/mach-mx3/pcm037_eet.c
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2009
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/gpio.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+
+#include <mach/common.h>
+#if defined(CONFIG_SPI_IMX) || defined(CONFIG_SPI_IMX_MODULE)
+#include <mach/spi.h>
+#endif
+#include <mach/iomux-mx3.h>
+
+#include <asm/mach-types.h>
+
+#include "pcm037.h"
+#include "devices.h"
+
+static unsigned int pcm037_eet_pins[] = {
+	/* SPI #1 */
+	MX31_PIN_CSPI1_MISO__MISO,
+	MX31_PIN_CSPI1_MOSI__MOSI,
+	MX31_PIN_CSPI1_SCLK__SCLK,
+	MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
+	MX31_PIN_CSPI1_SS0__SS0,
+	MX31_PIN_CSPI1_SS1__SS1,
+	MX31_PIN_CSPI1_SS2__SS2,
+
+	/* Reserve and hardwire GPIO 57 high - S6E63D6 chipselect */
+	IOMUX_MODE(MX31_PIN_KEY_COL7, IOMUX_CONFIG_GPIO),
+	/* GPIO keys */
+	IOMUX_MODE(MX31_PIN_GPIO1_0,	IOMUX_CONFIG_GPIO), /* 0 */
+	IOMUX_MODE(MX31_PIN_GPIO1_1,	IOMUX_CONFIG_GPIO), /* 1 */
+	IOMUX_MODE(MX31_PIN_GPIO1_2,	IOMUX_CONFIG_GPIO), /* 2 */
+	IOMUX_MODE(MX31_PIN_GPIO1_3,	IOMUX_CONFIG_GPIO), /* 3 */
+	IOMUX_MODE(MX31_PIN_SVEN0,	IOMUX_CONFIG_GPIO), /* 32 */
+	IOMUX_MODE(MX31_PIN_STX0,	IOMUX_CONFIG_GPIO), /* 33 */
+	IOMUX_MODE(MX31_PIN_SRX0,	IOMUX_CONFIG_GPIO), /* 34 */
+	IOMUX_MODE(MX31_PIN_SIMPD0,	IOMUX_CONFIG_GPIO), /* 35 */
+	IOMUX_MODE(MX31_PIN_RTS1,	IOMUX_CONFIG_GPIO), /* 38 */
+	IOMUX_MODE(MX31_PIN_CTS1,	IOMUX_CONFIG_GPIO), /* 39 */
+	IOMUX_MODE(MX31_PIN_KEY_ROW4,	IOMUX_CONFIG_GPIO), /* 50 */
+	IOMUX_MODE(MX31_PIN_KEY_ROW5,	IOMUX_CONFIG_GPIO), /* 51 */
+	IOMUX_MODE(MX31_PIN_KEY_ROW6,	IOMUX_CONFIG_GPIO), /* 52 */
+	IOMUX_MODE(MX31_PIN_KEY_ROW7,	IOMUX_CONFIG_GPIO), /* 53 */
+
+	/* LEDs */
+	IOMUX_MODE(MX31_PIN_DTR_DTE1,	IOMUX_CONFIG_GPIO), /* 44 */
+	IOMUX_MODE(MX31_PIN_DSR_DTE1,	IOMUX_CONFIG_GPIO), /* 45 */
+	IOMUX_MODE(MX31_PIN_KEY_COL5,	IOMUX_CONFIG_GPIO), /* 55 */
+	IOMUX_MODE(MX31_PIN_KEY_COL6,	IOMUX_CONFIG_GPIO), /* 56 */
+};
+
+/* SPI */
+static struct spi_board_info pcm037_spi_dev[] = {
+	{
+		.modalias	= "dac124s085",
+		.max_speed_hz	= 400000,
+		.bus_num	= 0,
+		.chip_select	= 0,		/* Index in pcm037_spi1_cs[] */
+		.mode		= SPI_CPHA,
+	},
+};
+
+/* Platform Data for MXC CSPI */
+#if defined(CONFIG_SPI_IMX) || defined(CONFIG_SPI_IMX_MODULE)
+static int pcm037_spi1_cs[] = {MXC_SPI_CS(1), IOMUX_TO_GPIO(MX31_PIN_KEY_COL7)};
+
+struct spi_imx_master pcm037_spi1_master = {
+	.chipselect = pcm037_spi1_cs,
+	.num_chipselect = ARRAY_SIZE(pcm037_spi1_cs),
+};
+#endif
+
+/* GPIO-keys input device */
+static struct gpio_keys_button pcm037_gpio_keys[] = {
+	{
+		.type	= EV_KEY,
+		.code	= KEY_L,
+		.gpio	= 0,
+		.desc	= "Wheel Manual",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_A,
+		.gpio	= 1,
+		.desc	= "Wheel AF",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_V,
+		.gpio	= 2,
+		.desc	= "Wheel View",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_M,
+		.gpio	= 3,
+		.desc	= "Wheel Menu",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_UP,
+		.gpio	= 32,
+		.desc	= "Nav Pad Up",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_RIGHT,
+		.gpio	= 33,
+		.desc	= "Nav Pad Right",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_DOWN,
+		.gpio	= 34,
+		.desc	= "Nav Pad Down",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_LEFT,
+		.gpio	= 35,
+		.desc	= "Nav Pad Left",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_ENTER,
+		.gpio	= 38,
+		.desc	= "Nav Pad Ok",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= KEY_O,
+		.gpio	= 39,
+		.desc	= "Wheel Off",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= BTN_FORWARD,
+		.gpio	= 50,
+		.desc	= "Focus Forward",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= BTN_BACK,
+		.gpio	= 51,
+		.desc	= "Focus Backward",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= BTN_MIDDLE,
+		.gpio	= 52,
+		.desc	= "Release Half",
+		.wakeup	= 0,
+	}, {
+		.type	= EV_KEY,
+		.code	= BTN_EXTRA,
+		.gpio	= 53,
+		.desc	= "Release Full",
+		.wakeup	= 0,
+	},
+};
+
+static struct gpio_keys_platform_data pcm037_gpio_keys_platform_data = {
+	.buttons	= pcm037_gpio_keys,
+	.nbuttons	= ARRAY_SIZE(pcm037_gpio_keys),
+	.rep		= 0, /* No auto-repeat */
+};
+
+static struct platform_device pcm037_gpio_keys_device = {
+	.name	= "gpio-keys",
+	.id	= -1,
+	.dev	= {
+		.platform_data	= &pcm037_gpio_keys_platform_data,
+	},
+};
+
+static int eet_init_devices(void)
+{
+	if (!machine_is_pcm037() || pcm037_variant() != PCM037_EET)
+		return 0;
+
+	mxc_iomux_setup_multiple_pins(pcm037_eet_pins,
+				ARRAY_SIZE(pcm037_eet_pins), "pcm037_eet");
+
+	/* SPI */
+	spi_register_board_info(pcm037_spi_dev, ARRAY_SIZE(pcm037_spi_dev));
+#if defined(CONFIG_SPI_IMX) || defined(CONFIG_SPI_IMX_MODULE)
+	mxc_register_device(&mxc_spi_device0, &pcm037_spi1_master);
+#endif
+
+	platform_device_register(&pcm037_gpio_keys_device);
+
+	return 0;
+}
+
+late_initcall(eet_init_devices);