| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 |