xref: /openbmc/u-boot/drivers/clk/sunxi/clk_a80.c (revision 1a68faac)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2018 Amarula Solutions.
4  * Author: Jagan Teki <jagan@amarulasolutions.com>
5  */
6 
7 #include <common.h>
8 #include <clk-uclass.h>
9 #include <dm.h>
10 #include <errno.h>
11 #include <asm/arch/ccu.h>
12 #include <dt-bindings/clock/sun9i-a80-ccu.h>
13 #include <dt-bindings/reset/sun9i-a80-ccu.h>
14 
15 static const struct ccu_clk_gate a80_gates[] = {
16 	[CLK_SPI0]		= GATE(0x430, BIT(31)),
17 	[CLK_SPI1]		= GATE(0x434, BIT(31)),
18 	[CLK_SPI2]		= GATE(0x438, BIT(31)),
19 	[CLK_SPI3]		= GATE(0x43c, BIT(31)),
20 
21 	[CLK_BUS_MMC]		= GATE(0x580, BIT(8)),
22 	[CLK_BUS_SPI0]		= GATE(0x580, BIT(20)),
23 	[CLK_BUS_SPI1]		= GATE(0x580, BIT(21)),
24 	[CLK_BUS_SPI2]		= GATE(0x580, BIT(22)),
25 	[CLK_BUS_SPI3]		= GATE(0x580, BIT(23)),
26 
27 	[CLK_BUS_UART0]		= GATE(0x594, BIT(16)),
28 	[CLK_BUS_UART1]		= GATE(0x594, BIT(17)),
29 	[CLK_BUS_UART2]		= GATE(0x594, BIT(18)),
30 	[CLK_BUS_UART3]		= GATE(0x594, BIT(19)),
31 	[CLK_BUS_UART4]		= GATE(0x594, BIT(20)),
32 	[CLK_BUS_UART5]		= GATE(0x594, BIT(21)),
33 };
34 
35 static const struct ccu_reset a80_resets[] = {
36 	[RST_BUS_MMC]		= RESET(0x5a0, BIT(8)),
37 	[RST_BUS_SPI0]		= RESET(0x5a0, BIT(20)),
38 	[RST_BUS_SPI1]		= RESET(0x5a0, BIT(21)),
39 	[RST_BUS_SPI2]		= RESET(0x5a0, BIT(22)),
40 	[RST_BUS_SPI3]		= RESET(0x5a0, BIT(23)),
41 
42 	[RST_BUS_UART0]		= RESET(0x5b4, BIT(16)),
43 	[RST_BUS_UART1]		= RESET(0x5b4, BIT(17)),
44 	[RST_BUS_UART2]		= RESET(0x5b4, BIT(18)),
45 	[RST_BUS_UART3]		= RESET(0x5b4, BIT(19)),
46 	[RST_BUS_UART4]		= RESET(0x5b4, BIT(20)),
47 	[RST_BUS_UART5]		= RESET(0x5b4, BIT(21)),
48 };
49 
50 static const struct ccu_clk_gate a80_mmc_gates[] = {
51 	[0]			= GATE(0x0, BIT(16)),
52 	[1]			= GATE(0x4, BIT(16)),
53 	[2]			= GATE(0x8, BIT(16)),
54 	[3]			= GATE(0xc, BIT(16)),
55 };
56 
57 static const struct ccu_reset a80_mmc_resets[] = {
58 	[0]			= GATE(0x0, BIT(18)),
59 	[1]			= GATE(0x4, BIT(18)),
60 	[2]			= GATE(0x8, BIT(18)),
61 	[3]			= GATE(0xc, BIT(18)),
62 };
63 
64 static const struct ccu_desc a80_ccu_desc = {
65 	.gates = a80_gates,
66 	.resets = a80_resets,
67 };
68 
69 static const struct ccu_desc a80_mmc_clk_desc = {
70 	.gates = a80_mmc_gates,
71 	.resets = a80_mmc_resets,
72 };
73 
74 static int a80_clk_bind(struct udevice *dev)
75 {
76 	ulong count = ARRAY_SIZE(a80_resets);
77 
78 	if (device_is_compatible(dev, "allwinner,sun9i-a80-mmc-config-clk"))
79 		count = ARRAY_SIZE(a80_mmc_resets);
80 
81 	return sunxi_reset_bind(dev, count);
82 }
83 
84 static const struct udevice_id a80_ccu_ids[] = {
85 	{ .compatible = "allwinner,sun9i-a80-ccu",
86 	  .data = (ulong)&a80_ccu_desc },
87 	{ .compatible = "allwinner,sun9i-a80-mmc-config-clk",
88 	  .data = (ulong)&a80_mmc_clk_desc },
89 	{ }
90 };
91 
92 U_BOOT_DRIVER(clk_sun9i_a80) = {
93 	.name		= "sun9i_a80_ccu",
94 	.id		= UCLASS_CLK,
95 	.of_match	= a80_ccu_ids,
96 	.priv_auto_alloc_size	= sizeof(struct ccu_priv),
97 	.ops		= &sunxi_clk_ops,
98 	.probe		= sunxi_clk_probe,
99 	.bind		= a80_clk_bind,
100 };
101