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mach-exynos4-dt.c
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1 /*
2  * Samsung's EXYNOS4 flattened device tree enabled machine
3  *
4  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
5  * http://www.samsung.com
6  * Copyright (c) 2010-2011 Linaro Ltd.
7  * www.linaro.org
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12 */
13 
14 #include <linux/of_platform.h>
15 #include <linux/serial_core.h>
16 
17 #include <asm/mach/arch.h>
18 #include <asm/hardware/gic.h>
19 #include <mach/map.h>
20 
21 #include <plat/cpu.h>
22 #include <plat/regs-serial.h>
23 
24 #include "common.h"
25 
26 /*
27  * The following lookup table is used to override device names when devices
28  * are registered from device tree. This is temporarily added to enable
29  * device tree support addition for the Exynos4 architecture.
30  *
31  * For drivers that require platform data to be provided from the machine
32  * file, a platform data pointer can also be supplied along with the
33  * devices names. Usually, the platform data elements that cannot be parsed
34  * from the device tree by the drivers (example: function pointers) are
35  * supplied. But it should be noted that this is a temporary mechanism and
36  * at some point, the drivers should be capable of parsing all the platform
37  * data from the device tree.
38  */
39 static const struct of_dev_auxdata exynos4_auxdata_lookup[] __initconst = {
40  OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART0,
41  "exynos4210-uart.0", NULL),
42  OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART1,
43  "exynos4210-uart.1", NULL),
44  OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART2,
45  "exynos4210-uart.2", NULL),
46  OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS4_PA_UART3,
47  "exynos4210-uart.3", NULL),
48  OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(0),
49  "exynos4-sdhci.0", NULL),
50  OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(1),
51  "exynos4-sdhci.1", NULL),
52  OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(2),
53  "exynos4-sdhci.2", NULL),
54  OF_DEV_AUXDATA("samsung,exynos4210-sdhci", EXYNOS4_PA_HSMMC(3),
55  "exynos4-sdhci.3", NULL),
56  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(0),
57  "s3c2440-i2c.0", NULL),
58  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(1),
59  "s3c2440-i2c.1", NULL),
60  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(2),
61  "s3c2440-i2c.2", NULL),
62  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(3),
63  "s3c2440-i2c.3", NULL),
64  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(4),
65  "s3c2440-i2c.4", NULL),
66  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(5),
67  "s3c2440-i2c.5", NULL),
68  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(6),
69  "s3c2440-i2c.6", NULL),
70  OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS4_PA_IIC(7),
71  "s3c2440-i2c.7", NULL),
72  OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS4_PA_SPI0,
73  "exynos4210-spi.0", NULL),
74  OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS4_PA_SPI1,
75  "exynos4210-spi.1", NULL),
76  OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS4_PA_SPI2,
77  "exynos4210-spi.2", NULL),
78  OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA0, "dma-pl330.0", NULL),
79  OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA1, "dma-pl330.1", NULL),
80  {},
81 };
82 
83 static void __init exynos4_dt_map_io(void)
84 {
85  exynos_init_io(NULL, 0);
86  s3c24xx_init_clocks(24000000);
87 }
88 
89 static void __init exynos4_dt_machine_init(void)
90 {
91  of_platform_populate(NULL, of_default_bus_match_table,
92  exynos4_auxdata_lookup, NULL);
93 }
94 
95 static char const *exynos4_dt_compat[] __initdata = {
96  "samsung,exynos4210",
97  NULL
98 };
99 
100 DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
101  /* Maintainer: Thomas Abraham <[email protected]> */
102  .smp = smp_ops(exynos_smp_ops),
103  .init_irq = exynos4_init_irq,
104  .map_io = exynos4_dt_map_io,
105  .handle_irq = gic_handle_irq,
106  .init_machine = exynos4_dt_machine_init,
107  .init_late = exynos_init_late,
108  .timer = &exynos4_timer,
109  .dt_compat = exynos4_dt_compat,
110  .restart = exynos4_restart,