tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
17static const struct clk_parent_data clk_parent_hosc[] = {
18 { .fw_name = "hosc" },
19};
20
21static const struct clk_parent_data clk_parent_bus[] = {
22 { .fw_name = "bus" },
23};
24
25static SUNXI_CCU_GATE_DATA(bus_hci0_clk, "bus-hci0", clk_parent_bus, 0x0, BIT(1), 0);
26static SUNXI_CCU_GATE_DATA(usb_ohci0_clk, "usb-ohci0", clk_parent_hosc, 0x0, BIT(2), 0);
27static SUNXI_CCU_GATE_DATA(bus_hci1_clk, "bus-hci1", clk_parent_bus, 0x0, BIT(3), 0);
28static SUNXI_CCU_GATE_DATA(bus_hci2_clk, "bus-hci2", clk_parent_bus, 0x0, BIT(5), 0);
29static SUNXI_CCU_GATE_DATA(usb_ohci2_clk, "usb-ohci2", clk_parent_hosc, 0x0, BIT(6), 0);
30
31static SUNXI_CCU_GATE_DATA(usb0_phy_clk, "usb0-phy", clk_parent_hosc, 0x4, BIT(1), 0);
32static SUNXI_CCU_GATE_DATA(usb1_hsic_clk, "usb1-hsic", clk_parent_hosc, 0x4, BIT(2), 0);
33static SUNXI_CCU_GATE_DATA(usb1_phy_clk, "usb1-phy", clk_parent_hosc, 0x4, BIT(3), 0);
34static SUNXI_CCU_GATE_DATA(usb2_hsic_clk, "usb2-hsic", clk_parent_hosc, 0x4, BIT(4), 0);
35static SUNXI_CCU_GATE_DATA(usb2_phy_clk, "usb2-phy", clk_parent_hosc, 0x4, BIT(5), 0);
36static SUNXI_CCU_GATE_DATA(usb_hsic_clk, "usb-hsic", clk_parent_hosc, 0x4, BIT(10), 0);
37
38static struct ccu_common *sun9i_a80_usb_clks[] = {
39 &bus_hci0_clk.common,
40 &usb_ohci0_clk.common,
41 &bus_hci1_clk.common,
42 &bus_hci2_clk.common,
43 &usb_ohci2_clk.common,
44
45 &usb0_phy_clk.common,
46 &usb1_hsic_clk.common,
47 &usb1_phy_clk.common,
48 &usb2_hsic_clk.common,
49 &usb2_phy_clk.common,
50 &usb_hsic_clk.common,
51};
52
53static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = {
54 .hws = {
55 [CLK_BUS_HCI0] = &bus_hci0_clk.common.hw,
56 [CLK_USB_OHCI0] = &usb_ohci0_clk.common.hw,
57 [CLK_BUS_HCI1] = &bus_hci1_clk.common.hw,
58 [CLK_BUS_HCI2] = &bus_hci2_clk.common.hw,
59 [CLK_USB_OHCI2] = &usb_ohci2_clk.common.hw,
60
61 [CLK_USB0_PHY] = &usb0_phy_clk.common.hw,
62 [CLK_USB1_HSIC] = &usb1_hsic_clk.common.hw,
63 [CLK_USB1_PHY] = &usb1_phy_clk.common.hw,
64 [CLK_USB2_HSIC] = &usb2_hsic_clk.common.hw,
65 [CLK_USB2_PHY] = &usb2_phy_clk.common.hw,
66 [CLK_USB_HSIC] = &usb_hsic_clk.common.hw,
67 },
68 .num = CLK_NUMBER,
69};
70
71static struct ccu_reset_map sun9i_a80_usb_resets[] = {
72 [RST_USB0_HCI] = { 0x0, BIT(17) },
73 [RST_USB1_HCI] = { 0x0, BIT(18) },
74 [RST_USB2_HCI] = { 0x0, BIT(19) },
75
76 [RST_USB0_PHY] = { 0x4, BIT(17) },
77 [RST_USB1_HSIC] = { 0x4, BIT(18) },
78 [RST_USB1_PHY] = { 0x4, BIT(19) },
79 [RST_USB2_HSIC] = { 0x4, BIT(20) },
80 [RST_USB2_PHY] = { 0x4, BIT(21) },
81};
82
83static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = {
84 .ccu_clks = sun9i_a80_usb_clks,
85 .num_ccu_clks = ARRAY_SIZE(sun9i_a80_usb_clks),
86
87 .hw_clks = &sun9i_a80_usb_hw_clks,
88
89 .resets = sun9i_a80_usb_resets,
90 .num_resets = ARRAY_SIZE(sun9i_a80_usb_resets),
91};
92
93static int sun9i_a80_usb_clk_probe(struct platform_device *pdev)
94{
95 struct resource *res;
96 struct clk *bus_clk;
97 void __iomem *reg;
98 int ret;
99
100 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
101 reg = devm_ioremap_resource(&pdev->dev, res);
102 if (IS_ERR(reg))
103 return PTR_ERR(reg);
104
105 bus_clk = devm_clk_get(&pdev->dev, "bus");
106 if (IS_ERR(bus_clk)) {
107 ret = PTR_ERR(bus_clk);
108 if (ret != -EPROBE_DEFER)
109 dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
110 return ret;
111 }
112
113 /* The bus clock needs to be enabled for us to access the registers */
114 ret = clk_prepare_enable(bus_clk);
115 if (ret) {
116 dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
117 return ret;
118 }
119
120 ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
121 &sun9i_a80_usb_clk_desc);
122 if (ret)
123 goto err_disable_clk;
124
125 return 0;
126
127err_disable_clk:
128 clk_disable_unprepare(bus_clk);
129 return ret;
130}
131
132static const struct of_device_id sun9i_a80_usb_clk_ids[] = {
133 { .compatible = "allwinner,sun9i-a80-usb-clks" },
134 { }
135};
136
137static struct platform_driver sun9i_a80_usb_clk_driver = {
138 .probe = sun9i_a80_usb_clk_probe,
139 .driver = {
140 .name = "sun9i-a80-usb-clks",
141 .of_match_table = sun9i_a80_usb_clk_ids,
142 },
143};
144builtin_platform_driver(sun9i_a80_usb_clk_driver);