arch/arm/mach-mxs/mach-mxs.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright 2012 Freescale Semiconductor, Inc.
  * Copyright 2012 Linaro Ltd.
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
  * Version 2 or later at the following locations:
  *
  * http://www.opensource.org/licenses/gpl-license.html
  * http://www.gnu.org/copyleft/gpl.html
  */

 #include <linux/clk.h>
 #include <linux/clkdev.h>
 #include <linux/can/platform/flexcan.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/micrel_phy.h>
 #include <linux/mxsfb.h>
 #include <linux/of_platform.h>
 #include <linux/phy.h>
 #include <linux/pinctrl/consumer.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 #include <mach/common.h>
 #include <mach/digctl.h>
 #include <mach/mxs.h>

 static struct fb_videomode mx23evk_video_modes[] = {
 	{
 		.name		= "Samsung-LMS430HF02",
 		.refresh	= 60,
 		.xres		= 480,
 		.yres		= 272,
 		.pixclock	= 108096, /* picosecond (9.2 MHz) */
 		.left_margin	= 15,
 		.right_margin	= 8,
 		.upper_margin	= 12,
 		.lower_margin	= 4,
 		.hsync_len	= 1,
 		.vsync_len	= 1,
 		.sync		= FB_SYNC_DATA_ENABLE_HIGH_ACT |
 				  FB_SYNC_DOTCLK_FAILING_ACT,
 	},
 };

 static struct fb_videomode mx28evk_video_modes[] = {
 	{
 		.name		= "Seiko-43WVF1G",
 		.refresh	= 60,
 		.xres		= 800,
 		.yres		= 480,
 		.pixclock	= 29851, /* picosecond (33.5 MHz) */
 		.left_margin	= 89,
 		.right_margin	= 164,
 		.upper_margin	= 23,
 		.lower_margin	= 10,
 		.hsync_len	= 10,
 		.vsync_len	= 10,
 		.sync		= FB_SYNC_DATA_ENABLE_HIGH_ACT |
 				  FB_SYNC_DOTCLK_FAILING_ACT,
 	},
 };

 static struct fb_videomode m28evk_video_modes[] = {
 	{
 		.name		= "Ampire AM-800480R2TMQW-T01H",
 		.refresh	= 60,
 		.xres		= 800,
 		.yres		= 480,
 		.pixclock	= 30066, /* picosecond (33.26 MHz) */
 		.left_margin	= 0,
 		.right_margin	= 256,
 		.upper_margin	= 0,
 		.lower_margin	= 45,
 		.hsync_len	= 1,
 		.vsync_len	= 1,
 		.sync		= FB_SYNC_DATA_ENABLE_HIGH_ACT,
 	},
 };

 static struct fb_videomode apx4devkit_video_modes[] = {
 	{
 		.name		= "HannStar PJ70112A",
 		.refresh	= 60,
 		.xres		= 800,
 		.yres		= 480,
 		.pixclock	= 33333, /* picosecond (30.00 MHz) */
 		.left_margin	= 88,
 		.right_margin	= 40,
 		.upper_margin	= 32,
 		.lower_margin	= 13,
 		.hsync_len	= 48,
 		.vsync_len	= 3,
 		.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT |
 				  FB_SYNC_DATA_ENABLE_HIGH_ACT |
 				  FB_SYNC_DOTCLK_FAILING_ACT,
 	},
 };

 static struct mxsfb_platform_data mxsfb_pdata __initdata;

 /*
  * MX28EVK_FLEXCAN_SWITCH is shared between both flexcan controllers
  */
 #define MX28EVK_FLEXCAN_SWITCH	MXS_GPIO_NR(2, 13)

 static int flexcan0_en, flexcan1_en;

 static void mx28evk_flexcan_switch(void)
 {
 	if (flexcan0_en || flexcan1_en)
 		gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 1);
 	else
 		gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 0);
 }

 static void mx28evk_flexcan0_switch(int enable)
 {
 	flexcan0_en = enable;
 	mx28evk_flexcan_switch();
 }

 static void mx28evk_flexcan1_switch(int enable)
 {
 	flexcan1_en = enable;
 	mx28evk_flexcan_switch();
 }

 static struct flexcan_platform_data flexcan_pdata[2];

 static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
 	OF_DEV_AUXDATA("fsl,imx23-lcdif", 0x80030000, NULL, &mxsfb_pdata),
 	OF_DEV_AUXDATA("fsl,imx28-lcdif", 0x80030000, NULL, &mxsfb_pdata),
 	OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80032000, NULL, &flexcan_pdata[0]),
 	OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80034000, NULL, &flexcan_pdata[1]),
 	{ /* sentinel */ }
 };

 static void __init imx23_timer_init(void)
 {
 	mx23_clocks_init();
 }

 static struct sys_timer imx23_timer = {
 	.init = imx23_timer_init,
 };

 static void __init imx28_timer_init(void)
 {
 	mx28_clocks_init();
 }

 static struct sys_timer imx28_timer = {
 	.init = imx28_timer_init,
 };

 enum mac_oui {
 	OUI_FSL,
 	OUI_DENX,
 };

 static void __init update_fec_mac_prop(enum mac_oui oui)
 {
 	struct device_node *np, *from = NULL;
 	struct property *newmac;
 	const u32 *ocotp = mxs_get_ocotp();
 	u8 *macaddr;
 	u32 val;
 	int i;

 	for (i = 0; i < 2; i++) {
 		np = of_find_compatible_node(from, NULL, "fsl,imx28-fec");
 		if (!np)
 			return;
 		from = np;

 		newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL);
 		if (!newmac)
 			return;
 		newmac->value = newmac + 1;
 		newmac->length = 6;

 		newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
 		if (!newmac->name) {
 			kfree(newmac);
 			return;
 		}

 		/*
 		 * OCOTP only stores the last 4 octets for each mac address,
 		 * so hard-code OUI here.
 		 */
 		macaddr = newmac->value;
 		switch (oui) {
 		case OUI_FSL:
 			macaddr[0] = 0x00;
 			macaddr[1] = 0x04;
 			macaddr[2] = 0x9f;
 			break;
 		case OUI_DENX:
 			macaddr[0] = 0xc0;
 			macaddr[1] = 0xe5;
 			macaddr[2] = 0x4e;
 			break;
 		}
 		val = ocotp[i];
 		macaddr[3] = (val >> 16) & 0xff;
 		macaddr[4] = (val >> 8) & 0xff;
 		macaddr[5] = (val >> 0) & 0xff;

 		prom_update_property(np, newmac);
 	}
 }

 static void __init imx23_evk_init(void)
 {
 	mxsfb_pdata.mode_list = mx23evk_video_modes;
 	mxsfb_pdata.mode_count = ARRAY_SIZE(mx23evk_video_modes);
 	mxsfb_pdata.default_bpp = 32;
 	mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
 }

 static inline void enable_clk_enet_out(void)
 {
 	struct clk *clk = clk_get_sys("enet_out", NULL);

 	if (!IS_ERR(clk))
 		clk_prepare_enable(clk);
 }

 static void __init imx28_evk_init(void)
 {
 	enable_clk_enet_out();
 	update_fec_mac_prop(OUI_FSL);

 	mxsfb_pdata.mode_list = mx28evk_video_modes;
 	mxsfb_pdata.mode_count = ARRAY_SIZE(mx28evk_video_modes);
 	mxsfb_pdata.default_bpp = 32;
 	mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;

 	mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
 }

 static void __init imx28_evk_post_init(void)
 {
 	if (!gpio_request_one(MX28EVK_FLEXCAN_SWITCH, GPIOF_DIR_OUT,
 			      "flexcan-switch")) {
 		flexcan_pdata[0].transceiver_switch = mx28evk_flexcan0_switch;
 		flexcan_pdata[1].transceiver_switch = mx28evk_flexcan1_switch;
 	}
 }

 static void __init m28evk_init(void)
 {
 	mxsfb_pdata.mode_list = m28evk_video_modes;
 	mxsfb_pdata.mode_count = ARRAY_SIZE(m28evk_video_modes);
 	mxsfb_pdata.default_bpp = 16;
 	mxsfb_pdata.ld_intf_width = STMLCDIF_18BIT;
 }

 static int apx4devkit_phy_fixup(struct phy_device *phy)
 {
 	phy->dev_flags |= MICREL_PHY_50MHZ_CLK;
 	return 0;
 }

 static void __init apx4devkit_init(void)
 {
 	enable_clk_enet_out();

 	if (IS_BUILTIN(CONFIG_PHYLIB))
 		phy_register_fixup_for_uid(PHY_ID_KSZ8051, MICREL_PHY_ID_MASK,
 					   apx4devkit_phy_fixup);

 	mxsfb_pdata.mode_list = apx4devkit_video_modes;
 	mxsfb_pdata.mode_count = ARRAY_SIZE(apx4devkit_video_modes);
 	mxsfb_pdata.default_bpp = 32;
 	mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
 }

 #define ENET0_MDC__GPIO_4_0	MXS_GPIO_NR(4, 0)
 #define ENET0_MDIO__GPIO_4_1	MXS_GPIO_NR(4, 1)
 #define ENET0_RX_EN__GPIO_4_2	MXS_GPIO_NR(4, 2)
 #define ENET0_RXD0__GPIO_4_3	MXS_GPIO_NR(4, 3)
 #define ENET0_RXD1__GPIO_4_4	MXS_GPIO_NR(4, 4)
 #define ENET0_TX_EN__GPIO_4_6	MXS_GPIO_NR(4, 6)
 #define ENET0_TXD0__GPIO_4_7	MXS_GPIO_NR(4, 7)
 #define ENET0_TXD1__GPIO_4_8	MXS_GPIO_NR(4, 8)
 #define ENET_CLK__GPIO_4_16	MXS_GPIO_NR(4, 16)

 #define TX28_FEC_PHY_POWER	MXS_GPIO_NR(3, 29)
 #define TX28_FEC_PHY_RESET	MXS_GPIO_NR(4, 13)
 #define TX28_FEC_nINT		MXS_GPIO_NR(4, 5)

 static const struct gpio tx28_gpios[] __initconst = {
 	{ ENET0_MDC__GPIO_4_0, GPIOF_OUT_INIT_LOW, "GPIO_4_0" },
 	{ ENET0_MDIO__GPIO_4_1, GPIOF_OUT_INIT_LOW, "GPIO_4_1" },
 	{ ENET0_RX_EN__GPIO_4_2, GPIOF_OUT_INIT_LOW, "GPIO_4_2" },
 	{ ENET0_RXD0__GPIO_4_3, GPIOF_OUT_INIT_LOW, "GPIO_4_3" },
 	{ ENET0_RXD1__GPIO_4_4, GPIOF_OUT_INIT_LOW, "GPIO_4_4" },
 	{ ENET0_TX_EN__GPIO_4_6, GPIOF_OUT_INIT_LOW, "GPIO_4_6" },
 	{ ENET0_TXD0__GPIO_4_7, GPIOF_OUT_INIT_LOW, "GPIO_4_7" },
 	{ ENET0_TXD1__GPIO_4_8, GPIOF_OUT_INIT_LOW, "GPIO_4_8" },
 	{ ENET_CLK__GPIO_4_16, GPIOF_OUT_INIT_LOW, "GPIO_4_16" },
 	{ TX28_FEC_PHY_POWER, GPIOF_OUT_INIT_LOW, "fec-phy-power" },
 	{ TX28_FEC_PHY_RESET, GPIOF_OUT_INIT_LOW, "fec-phy-reset" },
 	{ TX28_FEC_nINT, GPIOF_DIR_IN, "fec-int" },
 };

 static void __init tx28_post_init(void)
 {
 	struct device_node *np;
 	struct platform_device *pdev;
 	struct pinctrl *pctl;
 	int ret;

 	enable_clk_enet_out();

 	np = of_find_compatible_node(NULL, NULL, "fsl,imx28-fec");
 	pdev = of_find_device_by_node(np);
 	if (!pdev) {
 		pr_err("%s: failed to find fec device\n", __func__);
 		return;
 	}

 	pctl = pinctrl_get_select(&pdev->dev, "gpio_mode");
 	if (IS_ERR(pctl)) {
 		pr_err("%s: failed to get pinctrl state\n", __func__);
 		return;
 	}

 	ret = gpio_request_array(tx28_gpios, ARRAY_SIZE(tx28_gpios));
 	if (ret) {
 		pr_err("%s: failed to request gpios: %d\n", __func__, ret);
 		return;
 	}

 	/* Power up fec phy */
 	gpio_set_value(TX28_FEC_PHY_POWER, 1);
 	msleep(26); /* 25ms according to data sheet */

 	/* Mode strap pins */
 	gpio_set_value(ENET0_RX_EN__GPIO_4_2, 1);
 	gpio_set_value(ENET0_RXD0__GPIO_4_3, 1);
 	gpio_set_value(ENET0_RXD1__GPIO_4_4, 1);

 	udelay(100); /* minimum assertion time for nRST */

 	/* Deasserting FEC PHY RESET */
 	gpio_set_value(TX28_FEC_PHY_RESET, 1);

 	pinctrl_put(pctl);
 }

 static void __init mxs_machine_init(void)
 {
 	if (of_machine_is_compatible("fsl,imx28-evk"))
 		imx28_evk_init();
 	else if (of_machine_is_compatible("fsl,imx23-evk"))
 		imx23_evk_init();
 	else if (of_machine_is_compatible("denx,m28evk"))
 		m28evk_init();
 	else if (of_machine_is_compatible("bluegiga,apx4devkit"))
 		apx4devkit_init();

 	of_platform_populate(NULL, of_default_bus_match_table,
 			     mxs_auxdata_lookup, NULL);

 	if (of_machine_is_compatible("karo,tx28"))
 		tx28_post_init();

 	if (of_machine_is_compatible("fsl,imx28-evk"))
 		imx28_evk_post_init();
 }

 static const char *imx23_dt_compat[] __initdata = {
 	"fsl,imx23",
 	NULL,
 };

 static const char *imx28_dt_compat[] __initdata = {
 	"fsl,imx28",
 	NULL,
 };

 DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
 	.map_io		= mx23_map_io,
 	.init_irq	= icoll_init_irq,
 	.handle_irq	= icoll_handle_irq,
 	.timer		= &imx23_timer,
 	.init_machine	= mxs_machine_init,
 	.dt_compat	= imx23_dt_compat,
 	.restart	= mxs_restart,
 MACHINE_END

 DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
 	.map_io		= mx28_map_io,
 	.init_irq	= icoll_init_irq,
 	.handle_irq	= icoll_handle_irq,
 	.timer		= &imx28_timer,
 	.init_machine	= mxs_machine_init,
 	.dt_compat	= imx28_dt_compat,
 	.restart	= mxs_restart,
 MACHINE_END
	/*
	* Copyright 2012 Freescale Semiconductor, Inc.
	* Copyright 2012 Linaro Ltd.
	*
	* The code contained herein is licensed under the GNU General Public
	* License. You may obtain a copy of the GNU General Public License
	* Version 2 or later at the following locations:
	*
	* http://www.opensource.org/licenses/gpl-license.html
	* http://www.gnu.org/copyleft/gpl.html
	*/

	#include <linux/clk.h>
	#include <linux/clkdev.h>
	#include <linux/can/platform/flexcan.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/gpio.h>
	#include <linux/init.h>
	#include <linux/micrel_phy.h>
	#include <linux/mxsfb.h>
	#include <linux/of_platform.h>
	#include <linux/phy.h>
	#include <linux/pinctrl/consumer.h>
	#include <asm/mach/arch.h>
	#include <asm/mach/time.h>
	#include <mach/common.h>
	#include <mach/digctl.h>
	#include <mach/mxs.h>

	static struct fb_videomode mx23evk_video_modes[] = {
	{
	.name = "Samsung-LMS430HF02",
	.refresh = 60,
	.xres = 480,
	.yres = 272,
	.pixclock = 108096, /* picosecond (9.2 MHz) */
	.left_margin = 15,
	.right_margin = 8,
	.upper_margin = 12,
	.lower_margin = 4,
	.hsync_len = 1,
	.vsync_len = 1,
	.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT \|
	FB_SYNC_DOTCLK_FAILING_ACT,
	},
	};

	static struct fb_videomode mx28evk_video_modes[] = {
	{
	.name = "Seiko-43WVF1G",
	.refresh = 60,
	.xres = 800,
	.yres = 480,
	.pixclock = 29851, /* picosecond (33.5 MHz) */
	.left_margin = 89,
	.right_margin = 164,
	.upper_margin = 23,
	.lower_margin = 10,
	.hsync_len = 10,
	.vsync_len = 10,
	.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT \|
	FB_SYNC_DOTCLK_FAILING_ACT,
	},
	};

	static struct fb_videomode m28evk_video_modes[] = {
	{
	.name = "Ampire AM-800480R2TMQW-T01H",
	.refresh = 60,
	.xres = 800,
	.yres = 480,
	.pixclock = 30066, /* picosecond (33.26 MHz) */
	.left_margin = 0,
	.right_margin = 256,
	.upper_margin = 0,
	.lower_margin = 45,
	.hsync_len = 1,
	.vsync_len = 1,
	.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT,
	},
	};

	static struct fb_videomode apx4devkit_video_modes[] = {
	{
	.name = "HannStar PJ70112A",
	.refresh = 60,
	.xres = 800,
	.yres = 480,
	.pixclock = 33333, /* picosecond (30.00 MHz) */
	.left_margin = 88,
	.right_margin = 40,
	.upper_margin = 32,
	.lower_margin = 13,
	.hsync_len = 48,
	.vsync_len = 3,
	.sync = FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT \|
	FB_SYNC_DATA_ENABLE_HIGH_ACT \|
	FB_SYNC_DOTCLK_FAILING_ACT,
	},
	};

	static struct mxsfb_platform_data mxsfb_pdata __initdata;

	/*
	* MX28EVK_FLEXCAN_SWITCH is shared between both flexcan controllers
	*/
	#define MX28EVK_FLEXCAN_SWITCH MXS_GPIO_NR(2, 13)

	static int flexcan0_en, flexcan1_en;

	static void mx28evk_flexcan_switch(void)
	{
	if (flexcan0_en \|\| flexcan1_en)
	gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 1);
	else
	gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 0);
	}

	static void mx28evk_flexcan0_switch(int enable)
	{
	flexcan0_en = enable;
	mx28evk_flexcan_switch();
	}

	static void mx28evk_flexcan1_switch(int enable)
	{
	flexcan1_en = enable;
	mx28evk_flexcan_switch();
	}

	static struct flexcan_platform_data flexcan_pdata[2];

	static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
	OF_DEV_AUXDATA("fsl,imx23-lcdif", 0x80030000, NULL, &mxsfb_pdata),
	OF_DEV_AUXDATA("fsl,imx28-lcdif", 0x80030000, NULL, &mxsfb_pdata),
	OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80032000, NULL, &flexcan_pdata[0]),
	OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80034000, NULL, &flexcan_pdata[1]),
	{ /* sentinel */ }
	};

	static void __init imx23_timer_init(void)
	{
	mx23_clocks_init();
	}

	static struct sys_timer imx23_timer = {
	.init = imx23_timer_init,
	};

	static void __init imx28_timer_init(void)
	{
	mx28_clocks_init();
	}

	static struct sys_timer imx28_timer = {
	.init = imx28_timer_init,
	};

	enum mac_oui {
	OUI_FSL,
	OUI_DENX,
	};

	static void __init update_fec_mac_prop(enum mac_oui oui)
	{
	struct device_node np, from = NULL;
	struct property *newmac;
	const u32 *ocotp = mxs_get_ocotp();
	u8 *macaddr;
	u32 val;
	int i;

	for (i = 0; i < 2; i++) {
	np = of_find_compatible_node(from, NULL, "fsl,imx28-fec");
	if (!np)
	return;
	from = np;

	newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL);
	if (!newmac)
	return;
	newmac->value = newmac + 1;
	newmac->length = 6;

	newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
	if (!newmac->name) {
	kfree(newmac);
	return;
	}

	/*
	* OCOTP only stores the last 4 octets for each mac address,
	* so hard-code OUI here.
	*/
	macaddr = newmac->value;
	switch (oui) {
	case OUI_FSL:
	macaddr[0] = 0x00;
	macaddr[1] = 0x04;
	macaddr[2] = 0x9f;
	break;
	case OUI_DENX:
	macaddr[0] = 0xc0;
	macaddr[1] = 0xe5;
	macaddr[2] = 0x4e;
	break;
	}
	val = ocotp[i];
	macaddr[3] = (val >> 16) & 0xff;
	macaddr[4] = (val >> 8) & 0xff;
	macaddr[5] = (val >> 0) & 0xff;

	prom_update_property(np, newmac);
	}
	}

	static void __init imx23_evk_init(void)
	{
	mxsfb_pdata.mode_list = mx23evk_video_modes;
	mxsfb_pdata.mode_count = ARRAY_SIZE(mx23evk_video_modes);
	mxsfb_pdata.default_bpp = 32;
	mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
	}

	static inline void enable_clk_enet_out(void)
	{
	struct clk *clk = clk_get_sys("enet_out", NULL);

	if (!IS_ERR(clk))
	clk_prepare_enable(clk);
	}

	static void __init imx28_evk_init(void)
	{
	enable_clk_enet_out();
	update_fec_mac_prop(OUI_FSL);

	mxsfb_pdata.mode_list = mx28evk_video_modes;
	mxsfb_pdata.mode_count = ARRAY_SIZE(mx28evk_video_modes);
	mxsfb_pdata.default_bpp = 32;
	mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;

	mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
	}

	static void __init imx28_evk_post_init(void)
	{
	if (!gpio_request_one(MX28EVK_FLEXCAN_SWITCH, GPIOF_DIR_OUT,
	"flexcan-switch")) {
	flexcan_pdata[0].transceiver_switch = mx28evk_flexcan0_switch;
	flexcan_pdata[1].transceiver_switch = mx28evk_flexcan1_switch;
	}
	}

	static void __init m28evk_init(void)
	{
	mxsfb_pdata.mode_list = m28evk_video_modes;
	mxsfb_pdata.mode_count = ARRAY_SIZE(m28evk_video_modes);
	mxsfb_pdata.default_bpp = 16;
	mxsfb_pdata.ld_intf_width = STMLCDIF_18BIT;
	}

	static int apx4devkit_phy_fixup(struct phy_device *phy)
	{
	phy->dev_flags \|= MICREL_PHY_50MHZ_CLK;
	return 0;
	}

	static void __init apx4devkit_init(void)
	{
	enable_clk_enet_out();

	if (IS_BUILTIN(CONFIG_PHYLIB))
	phy_register_fixup_for_uid(PHY_ID_KSZ8051, MICREL_PHY_ID_MASK,
	apx4devkit_phy_fixup);

	mxsfb_pdata.mode_list = apx4devkit_video_modes;
	mxsfb_pdata.mode_count = ARRAY_SIZE(apx4devkit_video_modes);
	mxsfb_pdata.default_bpp = 32;
	mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
	}

	#define ENET0_MDC__GPIO_4_0 MXS_GPIO_NR(4, 0)
	#define ENET0_MDIO__GPIO_4_1 MXS_GPIO_NR(4, 1)
	#define ENET0_RX_EN__GPIO_4_2 MXS_GPIO_NR(4, 2)
	#define ENET0_RXD0__GPIO_4_3 MXS_GPIO_NR(4, 3)
	#define ENET0_RXD1__GPIO_4_4 MXS_GPIO_NR(4, 4)
	#define ENET0_TX_EN__GPIO_4_6 MXS_GPIO_NR(4, 6)
	#define ENET0_TXD0__GPIO_4_7 MXS_GPIO_NR(4, 7)
	#define ENET0_TXD1__GPIO_4_8 MXS_GPIO_NR(4, 8)
	#define ENET_CLK__GPIO_4_16 MXS_GPIO_NR(4, 16)

	#define TX28_FEC_PHY_POWER MXS_GPIO_NR(3, 29)
	#define TX28_FEC_PHY_RESET MXS_GPIO_NR(4, 13)
	#define TX28_FEC_nINT MXS_GPIO_NR(4, 5)

	static const struct gpio tx28_gpios[] __initconst = {
	{ ENET0_MDC__GPIO_4_0, GPIOF_OUT_INIT_LOW, "GPIO_4_0" },
	{ ENET0_MDIO__GPIO_4_1, GPIOF_OUT_INIT_LOW, "GPIO_4_1" },
	{ ENET0_RX_EN__GPIO_4_2, GPIOF_OUT_INIT_LOW, "GPIO_4_2" },
	{ ENET0_RXD0__GPIO_4_3, GPIOF_OUT_INIT_LOW, "GPIO_4_3" },
	{ ENET0_RXD1__GPIO_4_4, GPIOF_OUT_INIT_LOW, "GPIO_4_4" },
	{ ENET0_TX_EN__GPIO_4_6, GPIOF_OUT_INIT_LOW, "GPIO_4_6" },
	{ ENET0_TXD0__GPIO_4_7, GPIOF_OUT_INIT_LOW, "GPIO_4_7" },
	{ ENET0_TXD1__GPIO_4_8, GPIOF_OUT_INIT_LOW, "GPIO_4_8" },
	{ ENET_CLK__GPIO_4_16, GPIOF_OUT_INIT_LOW, "GPIO_4_16" },
	{ TX28_FEC_PHY_POWER, GPIOF_OUT_INIT_LOW, "fec-phy-power" },
	{ TX28_FEC_PHY_RESET, GPIOF_OUT_INIT_LOW, "fec-phy-reset" },
	{ TX28_FEC_nINT, GPIOF_DIR_IN, "fec-int" },
	};

	static void __init tx28_post_init(void)
	{
	struct device_node *np;
	struct platform_device *pdev;
	struct pinctrl *pctl;
	int ret;

	enable_clk_enet_out();

	np = of_find_compatible_node(NULL, NULL, "fsl,imx28-fec");
	pdev = of_find_device_by_node(np);
	if (!pdev) {
	pr_err("%s: failed to find fec device\n", __func__);
	return;
	}

	pctl = pinctrl_get_select(&pdev->dev, "gpio_mode");
	if (IS_ERR(pctl)) {
	pr_err("%s: failed to get pinctrl state\n", __func__);
	return;
	}

	ret = gpio_request_array(tx28_gpios, ARRAY_SIZE(tx28_gpios));
	if (ret) {
	pr_err("%s: failed to request gpios: %d\n", __func__, ret);
	return;
	}

	/* Power up fec phy */
	gpio_set_value(TX28_FEC_PHY_POWER, 1);
	msleep(26); /* 25ms according to data sheet */

	/* Mode strap pins */
	gpio_set_value(ENET0_RX_EN__GPIO_4_2, 1);
	gpio_set_value(ENET0_RXD0__GPIO_4_3, 1);
	gpio_set_value(ENET0_RXD1__GPIO_4_4, 1);

	udelay(100); /* minimum assertion time for nRST */

	/* Deasserting FEC PHY RESET */
	gpio_set_value(TX28_FEC_PHY_RESET, 1);

	pinctrl_put(pctl);
	}

	static void __init mxs_machine_init(void)
	{
	if (of_machine_is_compatible("fsl,imx28-evk"))
	imx28_evk_init();
	else if (of_machine_is_compatible("fsl,imx23-evk"))
	imx23_evk_init();
	else if (of_machine_is_compatible("denx,m28evk"))
	m28evk_init();
	else if (of_machine_is_compatible("bluegiga,apx4devkit"))
	apx4devkit_init();

	of_platform_populate(NULL, of_default_bus_match_table,
	mxs_auxdata_lookup, NULL);

	if (of_machine_is_compatible("karo,tx28"))
	tx28_post_init();

	if (of_machine_is_compatible("fsl,imx28-evk"))
	imx28_evk_post_init();
	}

	static const char *imx23_dt_compat[] __initdata = {
	"fsl,imx23",
	NULL,
	};

	static const char *imx28_dt_compat[] __initdata = {
	"fsl,imx28",
	NULL,
	};

	DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
	.map_io = mx23_map_io,
	.init_irq = icoll_init_irq,
	.handle_irq = icoll_handle_irq,
	.timer = &imx23_timer,
	.init_machine = mxs_machine_init,
	.dt_compat = imx23_dt_compat,
	.restart = mxs_restart,
	MACHINE_END

	DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
	.map_io = mx28_map_io,
	.init_irq = icoll_init_irq,
	.handle_irq = icoll_handle_irq,
	.timer = &imx28_timer,
	.init_machine = mxs_machine_init,
	.dt_compat = imx28_dt_compat,
	.restart = mxs_restart,
	MACHINE_END