ARM: mxs: Add initial mx28evk support

Add initial mx28evk support with duart and fec0.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

arch/arm/mach-mxs/mach-mx28evk.c

+/*
+ * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include <mach/common.h>
+#include <mach/iomux-mx28.h>
+
+#include "devices-mx28.h"
+#include "gpio.h"
+
+#define MX28EVK_FEC_PHY_POWER	MXS_GPIO_NR(2, 15)
+#define MX28EVK_FEC_PHY_RESET	MXS_GPIO_NR(4, 13)
+
+static const iomux_cfg_t mx28evk_pads[] __initconst = {
+	/* duart */
+	MX28_PAD_PWM0__DUART_RX |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	MX28_PAD_PWM1__DUART_TX |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+
+	/* fec0 */
+	MX28_PAD_ENET0_MDC__ENET0_MDC |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_MDIO__ENET0_MDIO |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_RX_EN__ENET0_RX_EN |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_RXD0__ENET0_RXD0 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_RXD1__ENET0_RXD1 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_TX_EN__ENET0_TX_EN |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_TXD0__ENET0_TXD0 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET0_TXD1__ENET0_TXD1 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_ENET_CLK__CLKCTRL_ENET |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	/* phy power line */
+	MX28_PAD_SSP1_DATA3__GPIO_2_15 |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	/* phy reset line */
+	MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+};
+
+/* fec */
+static void __init mx28evk_fec_reset(void)
+{
+	int ret;
+	struct clk *clk;
+
+	/* Enable fec phy clock */
+	clk = clk_get_sys("pll2", NULL);
+	if (!IS_ERR(clk))
+		clk_enable(clk);
+
+	/* Power up fec phy */
+	ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
+	if (ret) {
+		pr_err("Failed to request gpio fec-phy-%s: %d\n", "power", ret);
+		return;
+	}
+
+	ret = gpio_direction_output(MX28EVK_FEC_PHY_POWER, 0);
+	if (ret) {
+		pr_err("Failed to drive gpio fec-phy-%s: %d\n", "power", ret);
+		return;
+	}
+
+	/* Reset fec phy */
+	ret = gpio_request(MX28EVK_FEC_PHY_RESET, "fec-phy-reset");
+	if (ret) {
+		pr_err("Failed to request gpio fec-phy-%s: %d\n", "reset", ret);
+		return;
+	}
+
+	gpio_direction_output(MX28EVK_FEC_PHY_RESET, 0);
+	if (ret) {
+		pr_err("Failed to drive gpio fec-phy-%s: %d\n", "reset", ret);
+		return;
+	}
+
+	mdelay(1);
+	gpio_set_value(MX28EVK_FEC_PHY_RESET, 1);
+}
+
+static const struct fec_platform_data mx28_fec_pdata __initconst = {
+	.phy = PHY_INTERFACE_MODE_RMII,
+};
+
+static void __init mx28evk_init(void)
+{
+	mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
+
+	mx28_add_duart();
+
+	mx28evk_fec_reset();
+	mx28_add_fec(0, &mx28_fec_pdata);
+}
+
+static void __init mx28evk_timer_init(void)
+{
+	mx28_clocks_init();
+}
+
+static struct sys_timer mx28evk_timer = {
+	.init	= mx28evk_timer_init,
+};
+
+MACHINE_START(MX28EVK, "Freescale MX28 EVK")
+	/* Maintainer: Freescale Semiconductor, Inc. */
+	.map_io		= mx28_map_io,
+	.init_irq	= mx28_init_irq,
+	.init_machine	= mx28evk_init,
+	.timer		= &mx28evk_timer,
+MACHINE_END