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/arch/arm/mach-imx/imx53-dt.c

https://github.com/AICP/kernel_google_msm
C | 130 lines | 97 code | 16 blank | 17 comment | 1 complexity | 6e43b9e6de21e33ea5199e235e765608 MD5 | raw file
  1/*
  2 * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
  3 * Copyright 2011 Linaro Ltd.
  4 *
  5 * The code contained herein is licensed under the GNU General Public
  6 * License. You may obtain a copy of the GNU General Public License
  7 * Version 2 or later at the following locations:
  8 *
  9 * http://www.opensource.org/licenses/gpl-license.html
 10 * http://www.gnu.org/copyleft/gpl.html
 11 */
 12
 13#include <linux/io.h>
 14#include <linux/irq.h>
 15#include <linux/irqdomain.h>
 16#include <linux/of_irq.h>
 17#include <linux/of_platform.h>
 18#include <asm/mach/arch.h>
 19#include <asm/mach/time.h>
 20#include <mach/common.h>
 21#include <mach/mx53.h>
 22
 23/*
 24 * Lookup table for attaching a specific name and platform_data pointer to
 25 * devices as they get created by of_platform_populate().  Ideally this table
 26 * would not exist, but the current clock implementation depends on some devices
 27 * having a specific name.
 28 */
 29static const struct of_dev_auxdata imx53_auxdata_lookup[] __initconst = {
 30	OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART1_BASE_ADDR, "imx21-uart.0", NULL),
 31	OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART2_BASE_ADDR, "imx21-uart.1", NULL),
 32	OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART3_BASE_ADDR, "imx21-uart.2", NULL),
 33	OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART4_BASE_ADDR, "imx21-uart.3", NULL),
 34	OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART5_BASE_ADDR, "imx21-uart.4", NULL),
 35	OF_DEV_AUXDATA("fsl,imx53-fec", MX53_FEC_BASE_ADDR, "imx25-fec.0", NULL),
 36	OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx53.0", NULL),
 37	OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx53.1", NULL),
 38	OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx53.2", NULL),
 39	OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx53.3", NULL),
 40	OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
 41	OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
 42	OF_DEV_AUXDATA("fsl,imx53-cspi", MX53_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
 43	OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
 44	OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
 45	OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C3_BASE_ADDR, "imx-i2c.2", NULL),
 46	OF_DEV_AUXDATA("fsl,imx53-sdma", MX53_SDMA_BASE_ADDR, "imx35-sdma", NULL),
 47	OF_DEV_AUXDATA("fsl,imx53-wdt", MX53_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
 48	{ /* sentinel */ }
 49};
 50
 51static int __init imx53_tzic_add_irq_domain(struct device_node *np,
 52				struct device_node *interrupt_parent)
 53{
 54	irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
 55	return 0;
 56}
 57
 58static int __init imx53_gpio_add_irq_domain(struct device_node *np,
 59				struct device_node *interrupt_parent)
 60{
 61	static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
 62
 63	gpio_irq_base -= 32;
 64	irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
 65
 66	return 0;
 67}
 68
 69static const struct of_device_id imx53_irq_match[] __initconst = {
 70	{ .compatible = "fsl,imx53-tzic", .data = imx53_tzic_add_irq_domain, },
 71	{ .compatible = "fsl,imx53-gpio", .data = imx53_gpio_add_irq_domain, },
 72	{ /* sentinel */ }
 73};
 74
 75static const struct of_device_id imx53_iomuxc_of_match[] __initconst = {
 76	{ .compatible = "fsl,imx53-iomuxc-ard", .data = imx53_ard_common_init, },
 77	{ .compatible = "fsl,imx53-iomuxc-evk", .data = imx53_evk_common_init, },
 78	{ .compatible = "fsl,imx53-iomuxc-qsb", .data = imx53_qsb_common_init, },
 79	{ .compatible = "fsl,imx53-iomuxc-smd", .data = imx53_smd_common_init, },
 80	{ /* sentinel */ }
 81};
 82
 83static void __init imx53_dt_init(void)
 84{
 85	struct device_node *node;
 86	const struct of_device_id *of_id;
 87	void (*func)(void);
 88
 89	of_irq_init(imx53_irq_match);
 90
 91	node = of_find_matching_node(NULL, imx53_iomuxc_of_match);
 92	if (node) {
 93		of_id = of_match_node(imx53_iomuxc_of_match, node);
 94		func = of_id->data;
 95		func();
 96		of_node_put(node);
 97	}
 98
 99	of_platform_populate(NULL, of_default_bus_match_table,
100			     imx53_auxdata_lookup, NULL);
101}
102
103static void __init imx53_timer_init(void)
104{
105	mx53_clocks_init_dt();
106}
107
108static struct sys_timer imx53_timer = {
109	.init = imx53_timer_init,
110};
111
112static const char *imx53_dt_board_compat[] __initdata = {
113	"fsl,imx53-ard",
114	"fsl,imx53-evk",
115	"fsl,imx53-qsb",
116	"fsl,imx53-smd",
117	"fsl,imx53",
118	NULL
119};
120
121DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
122	.map_io		= mx53_map_io,
123	.init_early	= imx53_init_early,
124	.init_irq	= mx53_init_irq,
125	.handle_irq	= imx53_handle_irq,
126	.timer		= &imx53_timer,
127	.init_machine	= imx53_dt_init,
128	.dt_compat	= imx53_dt_board_compat,
129	.restart	= mxc_restart,
130MACHINE_END