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/irq.h>
14 #include <linux/irqdomain.h>
15 #include <linux/of_irq.h>
16 #include <linux/of_platform.h>
17 #include <asm/mach/arch.h>
18 #include <asm/mach/time.h>
19 #include <mach/common.h>
20 #include <mach/mx51.h>
21
22 /*
23 * Lookup table for attaching a specific name and platform_data pointer to
24 * devices as they get created by of_platform_populate(). Ideally this table
25 * would not exist, but the current clock implementation depends on some devices
26 * having a specific name.
27 */
28 static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = {
29 OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART1_BASE_ADDR, "imx21-uart.0", NULL),
30 OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART2_BASE_ADDR, "imx21-uart.1", NULL),
31 OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART3_BASE_ADDR, "imx21-uart.2", NULL),
32 OF_DEV_AUXDATA("fsl,imx51-fec", MX51_FEC_BASE_ADDR, "imx27-fec.0", NULL),
33 OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx51.0", NULL),
34 OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx51.1", NULL),
35 OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx51.2", NULL),
36 OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx51.3", NULL),
37 OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
38 OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
39 OF_DEV_AUXDATA("fsl,imx51-cspi", MX51_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
40 OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
41 OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
42 OF_DEV_AUXDATA("fsl,imx51-sdma", MX51_SDMA_BASE_ADDR, "imx35-sdma", NULL),
43 OF_DEV_AUXDATA("fsl,imx51-wdt", MX51_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
44 { /* sentinel */ }
45 };
46
imx51_tzic_add_irq_domain(struct device_node * np,struct device_node * interrupt_parent)47 static int __init imx51_tzic_add_irq_domain(struct device_node *np,
48 struct device_node *interrupt_parent)
49 {
50 irq_domain_add_simple(np, 0);
51 return 0;
52 }
53
imx51_gpio_add_irq_domain(struct device_node * np,struct device_node * interrupt_parent)54 static int __init imx51_gpio_add_irq_domain(struct device_node *np,
55 struct device_node *interrupt_parent)
56 {
57 static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
58
59 gpio_irq_base -= 32;
60 irq_domain_add_simple(np, gpio_irq_base);
61
62 return 0;
63 }
64
65 static const struct of_device_id imx51_irq_match[] __initconst = {
66 { .compatible = "fsl,imx51-tzic", .data = imx51_tzic_add_irq_domain, },
67 { .compatible = "fsl,imx51-gpio", .data = imx51_gpio_add_irq_domain, },
68 { /* sentinel */ }
69 };
70
71 static const struct of_device_id imx51_iomuxc_of_match[] __initconst = {
72 { .compatible = "fsl,imx51-iomuxc-babbage", .data = imx51_babbage_common_init, },
73 { /* sentinel */ }
74 };
75
imx51_dt_init(void)76 static void __init imx51_dt_init(void)
77 {
78 struct device_node *node;
79 const struct of_device_id *of_id;
80 void (*func)(void);
81
82 of_irq_init(imx51_irq_match);
83
84 node = of_find_matching_node(NULL, imx51_iomuxc_of_match);
85 if (node) {
86 of_id = of_match_node(imx51_iomuxc_of_match, node);
87 func = of_id->data;
88 func();
89 of_node_put(node);
90 }
91
92 of_platform_populate(NULL, of_default_bus_match_table,
93 imx51_auxdata_lookup, NULL);
94 }
95
imx51_timer_init(void)96 static void __init imx51_timer_init(void)
97 {
98 mx51_clocks_init_dt();
99 }
100
101 static struct sys_timer imx51_timer = {
102 .init = imx51_timer_init,
103 };
104
105 static const char *imx51_dt_board_compat[] __initdata = {
106 "fsl,imx51-babbage",
107 NULL
108 };
109
110 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
111 .map_io = mx51_map_io,
112 .init_early = imx51_init_early,
113 .init_irq = mx51_init_irq,
114 .handle_irq = imx51_handle_irq,
115 .timer = &imx51_timer,
116 .init_machine = imx51_dt_init,
117 .dt_compat = imx51_dt_board_compat,
118 .restart = mxc_restart,
119 MACHINE_END
120