ARM: imx6q: register phy fixup only when CONFIG_PHYLIB is enabled
[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-imx / mach-imx6q.c
1 /*
2  * Copyright 2011 Freescale Semiconductor, Inc.
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/delay.h>
14 #include <linux/init.h>
15 #include <linux/io.h>
16 #include <linux/irq.h>
17 #include <linux/irqdomain.h>
18 #include <linux/of.h>
19 #include <linux/of_address.h>
20 #include <linux/of_irq.h>
21 #include <linux/of_platform.h>
22 #include <linux/phy.h>
23 #include <linux/micrel_phy.h>
24 #include <asm/smp_twd.h>
25 #include <asm/hardware/cache-l2x0.h>
26 #include <asm/hardware/gic.h>
27 #include <asm/mach/arch.h>
28 #include <asm/mach/time.h>
29 #include <asm/system_misc.h>
30 #include <mach/common.h>
31 #include <mach/hardware.h>
32
33 void imx6q_restart(char mode, const char *cmd)
34 {
35         struct device_node *np;
36         void __iomem *wdog_base;
37
38         np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt");
39         wdog_base = of_iomap(np, 0);
40         if (!wdog_base)
41                 goto soft;
42
43         imx_src_prepare_restart();
44
45         /* enable wdog */
46         writew_relaxed(1 << 2, wdog_base);
47         /* write twice to ensure the request will not get ignored */
48         writew_relaxed(1 << 2, wdog_base);
49
50         /* wait for reset to assert ... */
51         mdelay(500);
52
53         pr_err("Watchdog reset failed to assert reset\n");
54
55         /* delay to allow the serial port to show the message */
56         mdelay(50);
57
58 soft:
59         /* we'll take a jump through zero as a poor second */
60         soft_restart(0);
61 }
62
63 /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
64 static int ksz9021rn_phy_fixup(struct phy_device *phydev)
65 {
66         if (IS_ENABLED(CONFIG_PHYLIB)) {
67                 /* min rx data delay */
68                 phy_write(phydev, 0x0b, 0x8105);
69                 phy_write(phydev, 0x0c, 0x0000);
70
71                 /* max rx/tx clock delay, min rx/tx control delay */
72                 phy_write(phydev, 0x0b, 0x8104);
73                 phy_write(phydev, 0x0c, 0xf0f0);
74                 phy_write(phydev, 0x0b, 0x104);
75         }
76
77         return 0;
78 }
79
80 static void __init imx6q_sabrelite_init(void)
81 {
82         if (IS_ENABLED(CONFIG_PHYLIB))
83                 phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
84                                 ksz9021rn_phy_fixup);
85 }
86
87 static void __init imx6q_init_machine(void)
88 {
89         if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
90                 imx6q_sabrelite_init();
91
92         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
93
94         imx6q_pm_init();
95 }
96
97 static void __init imx6q_map_io(void)
98 {
99         imx_lluart_map_io();
100         imx_scu_map_io();
101         imx6q_clock_map_io();
102 }
103
104 static int __init imx6q_gpio_add_irq_domain(struct device_node *np,
105                                 struct device_node *interrupt_parent)
106 {
107         static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
108
109         gpio_irq_base -= 32;
110         irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops,
111                               NULL);
112
113         return 0;
114 }
115
116 static const struct of_device_id imx6q_irq_match[] __initconst = {
117         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
118         { .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, },
119         { /* sentinel */ }
120 };
121
122 static void __init imx6q_init_irq(void)
123 {
124         l2x0_of_init(0, ~0UL);
125         imx_src_init();
126         imx_gpc_init();
127         of_irq_init(imx6q_irq_match);
128 }
129
130 static void __init imx6q_timer_init(void)
131 {
132         mx6q_clocks_init();
133         twd_local_timer_of_register();
134 }
135
136 static struct sys_timer imx6q_timer = {
137         .init = imx6q_timer_init,
138 };
139
140 static const char *imx6q_dt_compat[] __initdata = {
141         "fsl,imx6q-arm2",
142         "fsl,imx6q-sabrelite",
143         "fsl,imx6q-sabresd",
144         "fsl,imx6q",
145         NULL,
146 };
147
148 DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)")
149         .map_io         = imx6q_map_io,
150         .init_irq       = imx6q_init_irq,
151         .handle_irq     = imx6q_handle_irq,
152         .timer          = &imx6q_timer,
153         .init_machine   = imx6q_init_machine,
154         .dt_compat      = imx6q_dt_compat,
155         .restart        = imx6q_restart,
156 MACHINE_END