1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved. 4 */ 5 6 #include <linux/clk.h> 7 #include <linux/clk-provider.h> 8 #include <linux/of_address.h> 9 #include <linux/platform_device.h> 10 11 #include "ccu_common.h" 12 #include "ccu_gate.h" 13 #include "ccu_reset.h" 14 15 #include "ccu-sun9i-a80-usb.h" 16 17 static SUNXI_CCU_GATE(bus_hci0_clk, "bus-hci0", "bus-usb", 0x0, BIT(1), 0); 18 static SUNXI_CCU_GATE(usb_ohci0_clk, "usb-ohci0", "osc24M", 0x0, BIT(2), 0); 19 static SUNXI_CCU_GATE(bus_hci1_clk, "bus-hci1", "bus-usb", 0x0, BIT(3), 0); 20 static SUNXI_CCU_GATE(bus_hci2_clk, "bus-hci2", "bus-usb", 0x0, BIT(5), 0); 21 static SUNXI_CCU_GATE(usb_ohci2_clk, "usb-ohci2", "osc24M", 0x0, BIT(6), 0); 22 23 static SUNXI_CCU_GATE(usb0_phy_clk, "usb0-phy", "osc24M", 0x4, BIT(1), 0); 24 static SUNXI_CCU_GATE(usb1_hsic_clk, "usb1-hsic", "osc24M", 0x4, BIT(2), 0); 25 static SUNXI_CCU_GATE(usb1_phy_clk, "usb1-phy", "osc24M", 0x4, BIT(3), 0); 26 static SUNXI_CCU_GATE(usb2_hsic_clk, "usb2-hsic", "osc24M", 0x4, BIT(4), 0); 27 static SUNXI_CCU_GATE(usb2_phy_clk, "usb2-phy", "osc24M", 0x4, BIT(5), 0); 28 static SUNXI_CCU_GATE(usb_hsic_clk, "usb-hsic", "osc24M", 0x4, BIT(10), 0); 29 30 static struct ccu_common *sun9i_a80_usb_clks[] = { 31 &bus_hci0_clk.common, 32 &usb_ohci0_clk.common, 33 &bus_hci1_clk.common, 34 &bus_hci2_clk.common, 35 &usb_ohci2_clk.common, 36 37 &usb0_phy_clk.common, 38 &usb1_hsic_clk.common, 39 &usb1_phy_clk.common, 40 &usb2_hsic_clk.common, 41 &usb2_phy_clk.common, 42 &usb_hsic_clk.common, 43 }; 44 45 static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = { 46 .hws = { 47 [CLK_BUS_HCI0] = &bus_hci0_clk.common.hw, 48 [CLK_USB_OHCI0] = &usb_ohci0_clk.common.hw, 49 [CLK_BUS_HCI1] = &bus_hci1_clk.common.hw, 50 [CLK_BUS_HCI2] = &bus_hci2_clk.common.hw, 51 [CLK_USB_OHCI2] = &usb_ohci2_clk.common.hw, 52 53 [CLK_USB0_PHY] = &usb0_phy_clk.common.hw, 54 [CLK_USB1_HSIC] = &usb1_hsic_clk.common.hw, 55 [CLK_USB1_PHY] = &usb1_phy_clk.common.hw, 56 [CLK_USB2_HSIC] = &usb2_hsic_clk.common.hw, 57 [CLK_USB2_PHY] = &usb2_phy_clk.common.hw, 58 [CLK_USB_HSIC] = &usb_hsic_clk.common.hw, 59 }, 60 .num = CLK_NUMBER, 61 }; 62 63 static struct ccu_reset_map sun9i_a80_usb_resets[] = { 64 [RST_USB0_HCI] = { 0x0, BIT(17) }, 65 [RST_USB1_HCI] = { 0x0, BIT(18) }, 66 [RST_USB2_HCI] = { 0x0, BIT(19) }, 67 68 [RST_USB0_PHY] = { 0x4, BIT(17) }, 69 [RST_USB1_HSIC] = { 0x4, BIT(18) }, 70 [RST_USB1_PHY] = { 0x4, BIT(19) }, 71 [RST_USB2_HSIC] = { 0x4, BIT(20) }, 72 [RST_USB2_PHY] = { 0x4, BIT(21) }, 73 }; 74 75 static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = { 76 .ccu_clks = sun9i_a80_usb_clks, 77 .num_ccu_clks = ARRAY_SIZE(sun9i_a80_usb_clks), 78 79 .hw_clks = &sun9i_a80_usb_hw_clks, 80 81 .resets = sun9i_a80_usb_resets, 82 .num_resets = ARRAY_SIZE(sun9i_a80_usb_resets), 83 }; 84 85 static int sun9i_a80_usb_clk_probe(struct platform_device *pdev) 86 { 87 struct resource *res; 88 struct clk *bus_clk; 89 void __iomem *reg; 90 int ret; 91 92 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 93 reg = devm_ioremap_resource(&pdev->dev, res); 94 if (IS_ERR(reg)) 95 return PTR_ERR(reg); 96 97 bus_clk = devm_clk_get(&pdev->dev, "bus"); 98 if (IS_ERR(bus_clk)) { 99 ret = PTR_ERR(bus_clk); 100 if (ret != -EPROBE_DEFER) 101 dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret); 102 return ret; 103 } 104 105 /* The bus clock needs to be enabled for us to access the registers */ 106 ret = clk_prepare_enable(bus_clk); 107 if (ret) { 108 dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret); 109 return ret; 110 } 111 112 ret = sunxi_ccu_probe(pdev->dev.of_node, reg, 113 &sun9i_a80_usb_clk_desc); 114 if (ret) 115 goto err_disable_clk; 116 117 return 0; 118 119 err_disable_clk: 120 clk_disable_unprepare(bus_clk); 121 return ret; 122 } 123 124 static const struct of_device_id sun9i_a80_usb_clk_ids[] = { 125 { .compatible = "allwinner,sun9i-a80-usb-clks" }, 126 { } 127 }; 128 129 static struct platform_driver sun9i_a80_usb_clk_driver = { 130 .probe = sun9i_a80_usb_clk_probe, 131 .driver = { 132 .name = "sun9i-a80-usb-clks", 133 .of_match_table = sun9i_a80_usb_clk_ids, 134 }, 135 }; 136 builtin_platform_driver(sun9i_a80_usb_clk_driver); 137