ARM: mxs: Add initial mx28evk support

/*

 * 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