GNU Linux-libre 4.19.314-gnu1
[releases.git] / drivers / clk / meson / gxbb-aoclk.c
1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 /*
3  * Copyright (c) 2016 BayLibre, SAS.
4  * Author: Neil Armstrong <narmstrong@baylibre.com>
5  */
6 #include <linux/platform_device.h>
7 #include <linux/mfd/syscon.h>
8 #include "clk-regmap.h"
9 #include "meson-aoclk.h"
10 #include "gxbb-aoclk.h"
11
12 #define GXBB_AO_GATE(_name, _bit)                                       \
13 static struct clk_regmap _name##_ao = {                                 \
14         .data = &(struct clk_regmap_gate_data) {                        \
15                 .offset = AO_RTI_GEN_CNTL_REG0,                         \
16                 .bit_idx = (_bit),                                      \
17         },                                                              \
18         .hw.init = &(struct clk_init_data) {                            \
19                 .name = #_name "_ao",                                   \
20                 .ops = &clk_regmap_gate_ops,                            \
21                 .parent_names = (const char *[]){ "clk81" },            \
22                 .num_parents = 1,                                       \
23                 .flags = CLK_IGNORE_UNUSED,                             \
24         },                                                              \
25 }
26
27 GXBB_AO_GATE(remote, 0);
28 GXBB_AO_GATE(i2c_master, 1);
29 GXBB_AO_GATE(i2c_slave, 2);
30 GXBB_AO_GATE(uart1, 3);
31 GXBB_AO_GATE(uart2, 5);
32 GXBB_AO_GATE(ir_blaster, 6);
33
34 static struct aoclk_cec_32k cec_32k_ao = {
35         .hw.init = &(struct clk_init_data) {
36                 .name = "cec_32k_ao",
37                 .ops = &meson_aoclk_cec_32k_ops,
38                 .parent_names = (const char *[]){ "xtal" },
39                 .num_parents = 1,
40                 .flags = CLK_IGNORE_UNUSED,
41         },
42 };
43
44 static const unsigned int gxbb_aoclk_reset[] = {
45         [RESET_AO_REMOTE] = 16,
46         [RESET_AO_I2C_MASTER] = 18,
47         [RESET_AO_I2C_SLAVE] = 19,
48         [RESET_AO_UART1] = 17,
49         [RESET_AO_UART2] = 22,
50         [RESET_AO_IR_BLASTER] = 23,
51 };
52
53 static struct clk_regmap *gxbb_aoclk_gate[] = {
54         [CLKID_AO_REMOTE] = &remote_ao,
55         [CLKID_AO_I2C_MASTER] = &i2c_master_ao,
56         [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao,
57         [CLKID_AO_UART1] = &uart1_ao,
58         [CLKID_AO_UART2] = &uart2_ao,
59         [CLKID_AO_IR_BLASTER] = &ir_blaster_ao,
60 };
61
62 static const struct clk_hw_onecell_data gxbb_aoclk_onecell_data = {
63         .hws = {
64                 [CLKID_AO_REMOTE] = &remote_ao.hw,
65                 [CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw,
66                 [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao.hw,
67                 [CLKID_AO_UART1] = &uart1_ao.hw,
68                 [CLKID_AO_UART2] = &uart2_ao.hw,
69                 [CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw,
70                 [CLKID_AO_CEC_32K] = &cec_32k_ao.hw,
71         },
72         .num = NR_CLKS,
73 };
74
75 static int gxbb_register_cec_ao_32k(struct platform_device *pdev)
76 {
77         struct device *dev = &pdev->dev;
78         struct regmap *regmap;
79         int ret;
80
81         regmap = syscon_node_to_regmap(of_get_parent(dev->of_node));
82         if (IS_ERR(regmap)) {
83                 dev_err(dev, "failed to get regmap\n");
84                 return PTR_ERR(regmap);
85         }
86
87         /* Specific clocks */
88         cec_32k_ao.regmap = regmap;
89         ret = devm_clk_hw_register(dev, &cec_32k_ao.hw);
90         if (ret) {
91                 dev_err(&pdev->dev, "clk cec_32k_ao register failed.\n");
92                 return ret;
93         }
94
95         return 0;
96 }
97
98 static const struct meson_aoclk_data gxbb_aoclkc_data = {
99         .reset_reg      = AO_RTI_GEN_CNTL_REG0,
100         .num_reset      = ARRAY_SIZE(gxbb_aoclk_reset),
101         .reset          = gxbb_aoclk_reset,
102         .num_clks       = ARRAY_SIZE(gxbb_aoclk_gate),
103         .clks           = gxbb_aoclk_gate,
104         .hw_data        = &gxbb_aoclk_onecell_data,
105 };
106
107 static int gxbb_aoclkc_probe(struct platform_device *pdev)
108 {
109         int ret = gxbb_register_cec_ao_32k(pdev);
110         if (ret)
111                 return ret;
112
113         return meson_aoclkc_probe(pdev);
114 }
115
116 static const struct of_device_id gxbb_aoclkc_match_table[] = {
117         {
118                 .compatible     = "amlogic,meson-gx-aoclkc",
119                 .data           = &gxbb_aoclkc_data,
120         },
121         { }
122 };
123
124 static struct platform_driver gxbb_aoclkc_driver = {
125         .probe          = gxbb_aoclkc_probe,
126         .driver         = {
127                 .name   = "gxbb-aoclkc",
128                 .of_match_table = gxbb_aoclkc_match_table,
129         },
130 };
131 builtin_platform_driver(gxbb_aoclkc_driver);