1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2014 Freescale Semiconductor, Inc. 4 */ 5 6 #include <linux/irqchip.h> 7 #include <linux/of_platform.h> 8 #include <linux/phy.h> 9 #include <linux/regmap.h> 10 #include <linux/mfd/syscon.h> 11 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> 12 #include <asm/mach/arch.h> 13 #include <asm/mach/map.h> 14 15 #include "common.h" 16 #include "cpuidle.h" 17 18 static int ar8031_phy_fixup(struct phy_device *dev) 19 { 20 u16 val; 21 22 /* Set RGMII IO voltage to 1.8V */ 23 phy_write(dev, 0x1d, 0x1f); 24 phy_write(dev, 0x1e, 0x8); 25 26 /* introduce tx clock delay */ 27 phy_write(dev, 0x1d, 0x5); 28 val = phy_read(dev, 0x1e); 29 val |= 0x0100; 30 phy_write(dev, 0x1e, val); 31 32 return 0; 33 } 34 35 #define PHY_ID_AR8031 0x004dd074 36 static void __init imx6sx_enet_phy_init(void) 37 { 38 if (IS_BUILTIN(CONFIG_PHYLIB)) 39 phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff, 40 ar8031_phy_fixup); 41 } 42 43 static void __init imx6sx_enet_clk_sel(void) 44 { 45 struct regmap *gpr; 46 47 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sx-iomuxc-gpr"); 48 if (!IS_ERR(gpr)) { 49 regmap_update_bits(gpr, IOMUXC_GPR1, 50 IMX6SX_GPR1_FEC_CLOCK_MUX_SEL_MASK, 0); 51 regmap_update_bits(gpr, IOMUXC_GPR1, 52 IMX6SX_GPR1_FEC_CLOCK_PAD_DIR_MASK, 0); 53 } else { 54 pr_err("failed to find fsl,imx6sx-iomux-gpr regmap\n"); 55 } 56 } 57 58 static inline void imx6sx_enet_init(void) 59 { 60 imx6sx_enet_phy_init(); 61 imx6sx_enet_clk_sel(); 62 } 63 64 static void __init imx6sx_init_machine(void) 65 { 66 struct device *parent; 67 68 parent = imx_soc_device_init(); 69 if (parent == NULL) 70 pr_warn("failed to initialize soc device\n"); 71 72 of_platform_default_populate(NULL, NULL, parent); 73 74 imx6sx_enet_init(); 75 imx_anatop_init(); 76 imx6sx_pm_init(); 77 } 78 79 static void __init imx6sx_init_irq(void) 80 { 81 imx_gpc_check_dt(); 82 imx_init_revision_from_anatop(); 83 imx_init_l2cache(); 84 imx_src_init(); 85 irqchip_init(); 86 imx6_pm_ccm_init("fsl,imx6sx-ccm"); 87 } 88 89 static void __init imx6sx_init_late(void) 90 { 91 imx6sx_cpuidle_init(); 92 93 if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) 94 platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0); 95 } 96 97 static const char * const imx6sx_dt_compat[] __initconst = { 98 "fsl,imx6sx", 99 NULL, 100 }; 101 102 DT_MACHINE_START(IMX6SX, "Freescale i.MX6 SoloX (Device Tree)") 103 .l2c_aux_val = 0, 104 .l2c_aux_mask = ~0, 105 .init_irq = imx6sx_init_irq, 106 .init_machine = imx6sx_init_machine, 107 .dt_compat = imx6sx_dt_compat, 108 .init_late = imx6sx_init_late, 109 MACHINE_END 110