Merge remote-tracking branches 'regulator/fix/88pm800', 'regulator/fix/max8973',...
[linux-drm-fsl-dcu.git] / arch / arm / mach-imx / mach-imx6sx.c
1 /*
2  * Copyright 2014 Freescale Semiconductor, Inc.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8
9 #include <linux/irqchip.h>
10 #include <linux/of_platform.h>
11 #include <linux/phy.h>
12 #include <linux/regmap.h>
13 #include <linux/mfd/syscon.h>
14 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
15 #include <asm/mach/arch.h>
16 #include <asm/mach/map.h>
17
18 #include "common.h"
19 #include "cpuidle.h"
20
21 static int ar8031_phy_fixup(struct phy_device *dev)
22 {
23         u16 val;
24
25         /* Set RGMII IO voltage to 1.8V */
26         phy_write(dev, 0x1d, 0x1f);
27         phy_write(dev, 0x1e, 0x8);
28
29         /* introduce tx clock delay */
30         phy_write(dev, 0x1d, 0x5);
31         val = phy_read(dev, 0x1e);
32         val |= 0x0100;
33         phy_write(dev, 0x1e, val);
34
35         return 0;
36 }
37
38 #define PHY_ID_AR8031   0x004dd074
39 static void __init imx6sx_enet_phy_init(void)
40 {
41         if (IS_BUILTIN(CONFIG_PHYLIB))
42                 phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
43                                            ar8031_phy_fixup);
44 }
45
46 static void __init imx6sx_enet_clk_sel(void)
47 {
48         struct regmap *gpr;
49
50         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sx-iomuxc-gpr");
51         if (!IS_ERR(gpr)) {
52                 regmap_update_bits(gpr, IOMUXC_GPR1,
53                                    IMX6SX_GPR1_FEC_CLOCK_MUX_SEL_MASK, 0);
54                 regmap_update_bits(gpr, IOMUXC_GPR1,
55                                    IMX6SX_GPR1_FEC_CLOCK_PAD_DIR_MASK, 0);
56         } else {
57                 pr_err("failed to find fsl,imx6sx-iomux-gpr regmap\n");
58         }
59 }
60
61 static inline void imx6sx_enet_init(void)
62 {
63         imx6sx_enet_phy_init();
64         imx6sx_enet_clk_sel();
65 }
66
67 static void __init imx6sx_init_machine(void)
68 {
69         struct device *parent;
70
71         parent = imx_soc_device_init();
72         if (parent == NULL)
73                 pr_warn("failed to initialize soc device\n");
74
75         of_platform_populate(NULL, of_default_bus_match_table, NULL, parent);
76
77         imx6sx_enet_init();
78         imx_anatop_init();
79         imx6sx_pm_init();
80 }
81
82 static void __init imx6sx_init_irq(void)
83 {
84         imx_gpc_check_dt();
85         imx_init_revision_from_anatop();
86         imx_init_l2cache();
87         imx_src_init();
88         irqchip_init();
89         imx6_pm_ccm_init("fsl,imx6sx-ccm");
90 }
91
92 static void __init imx6sx_init_late(void)
93 {
94         imx6sx_cpuidle_init();
95
96         if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
97                 platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
98 }
99
100 static const char * const imx6sx_dt_compat[] __initconst = {
101         "fsl,imx6sx",
102         NULL,
103 };
104
105 DT_MACHINE_START(IMX6SX, "Freescale i.MX6 SoloX (Device Tree)")
106         .init_irq       = imx6sx_init_irq,
107         .init_machine   = imx6sx_init_machine,
108         .dt_compat      = imx6sx_dt_compat,
109         .init_late      = imx6sx_init_late,
110 MACHINE_END