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arm/tegra: Use bus notifiers to trigger pinmux setup
[karo-tx-linux.git] / arch / arm / mach-tegra / board-dt.c
1 /*
2  * nVidia Tegra device tree board support
3  *
4  * Copyright (C) 2010 Secret Lab Technologies, Ltd.
5  * Copyright (C) 2010 Google, Inc.
6  *
7  * This software is licensed under the terms of the GNU General Public
8  * License version 2, as published by the Free Software Foundation, and
9  * may be copied, distributed, and modified under those terms.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  */
17
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/platform_device.h>
21 #include <linux/serial_8250.h>
22 #include <linux/clk.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/irqdomain.h>
25 #include <linux/of.h>
26 #include <linux/of_address.h>
27 #include <linux/of_fdt.h>
28 #include <linux/of_irq.h>
29 #include <linux/of_platform.h>
30 #include <linux/pda_power.h>
31 #include <linux/io.h>
32 #include <linux/i2c.h>
33 #include <linux/i2c-tegra.h>
34
35 #include <asm/mach-types.h>
36 #include <asm/mach/arch.h>
37 #include <asm/mach/time.h>
38 #include <asm/setup.h>
39
40 #include <mach/iomap.h>
41 #include <mach/irqs.h>
42
43 #include "board.h"
44 #include "board-harmony.h"
45 #include "clock.h"
46 #include "devices.h"
47
48 void harmony_pinmux_init(void);
49 void seaboard_pinmux_init(void);
50 void ventana_pinmux_init(void);
51
52 struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
53         OF_DEV_AUXDATA("nvidia,tegra20-pinmux", TEGRA_APB_MISC_BASE + 0x14, "tegra-pinmux", NULL),
54         OF_DEV_AUXDATA("nvidia,tegra20-gpio", TEGRA_GPIO_BASE, "tegra-gpio", NULL),
55         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC1_BASE, "sdhci-tegra.0", NULL),
56         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC2_BASE, "sdhci-tegra.1", NULL),
57         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC3_BASE, "sdhci-tegra.2", NULL),
58         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC4_BASE, "sdhci-tegra.3", NULL),
59         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C_BASE, "tegra-i2c.0", NULL),
60         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C2_BASE, "tegra-i2c.1", NULL),
61         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C3_BASE, "tegra-i2c.2", NULL),
62         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_DVC_BASE, "tegra-i2c.3", NULL),
63         OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.0", NULL),
64         OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.1", NULL),
65         OF_DEV_AUXDATA("nvidia,tegra20-das", TEGRA_APB_MISC_DAS_BASE, "tegra-das", NULL),
66         {}
67 };
68
69 static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
70         /* name         parent          rate            enabled */
71         { "uartd",      "pll_p",        216000000,      true },
72         { NULL,         NULL,           0,              0},
73 };
74
75 static struct of_device_id tegra_dt_match_table[] __initdata = {
76         { .compatible = "simple-bus", },
77         {}
78 };
79
80 static struct of_device_id tegra_dt_gic_match[] __initdata = {
81         { .compatible = "nvidia,tegra20-gic", },
82         {}
83 };
84
85 static struct {
86         char *machine;
87         void (*init)(void);
88 } pinmux_configs[] = {
89         { "nvidia,harmony", harmony_pinmux_init },
90         { "nvidia,seaboard", seaboard_pinmux_init },
91         { "nvidia,ventana", ventana_pinmux_init },
92 };
93
94 static void __init tegra_dt_init(void)
95 {
96         struct device_node *node;
97         int i;
98
99         node = of_find_matching_node_by_address(NULL, tegra_dt_gic_match,
100                                                 TEGRA_ARM_INT_DIST_BASE);
101         if (node)
102                 irq_domain_add_simple(node, INT_GIC_BASE);
103
104         tegra_clk_init_from_table(tegra_dt_clk_init_table);
105
106         for (i = 0; i < ARRAY_SIZE(pinmux_configs); i++) {
107                 if (of_machine_is_compatible(pinmux_configs[i].machine)) {
108                         pinmux_configs[i].init();
109                         break;
110                 }
111         }
112
113         WARN(i == ARRAY_SIZE(pinmux_configs),
114                 "Unknown platform! Pinmuxing not initialized\n");
115
116         /*
117          * Finished with the static registrations now; fill in the missing
118          * devices
119          */
120         of_platform_populate(NULL, tegra_dt_match_table,
121                                 tegra20_auxdata_lookup, NULL);
122 }
123
124 static const char * tegra_dt_board_compat[] = {
125         "nvidia,harmony",
126         "nvidia,seaboard",
127         "nvidia,ventana",
128         NULL
129 };
130
131 DT_MACHINE_START(TEGRA_DT, "nVidia Tegra (Flattened Device Tree)")
132         .map_io         = tegra_map_common_io,
133         .init_early     = tegra_init_early,
134         .init_irq       = tegra_init_irq,
135         .timer          = &tegra_timer,
136         .init_machine   = tegra_dt_init,
137         .dt_compat      = tegra_dt_board_compat,
138 MACHINE_END