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git01.mediatek.com / filogic / uboot / 10e4779db8ae6c2784392fa7a1f690645918662d / . / drivers / pinctrl / aspeed / pinctrl_ast2500.c
blob: ed333b9c5c6312f1b1bd32d12e38470ac4ed404f [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0+
maxims@google.com54651aa2017-04-17 12:00:27 -0700[diff] [blame]2/*
3 * Copyright 2017 Google, Inc
maxims@google.com54651aa2017-04-17 12:00:27 -0700[diff] [blame]4 */
5
6#include <common.h>
7#include <dm.h>
8#include <errno.h>
9#include <asm/io.h>
10#include <asm/arch/pinctrl.h>
11#include <asm/arch/scu_ast2500.h>
12#include <dm/pinctrl.h>
13
maxims@google.com54651aa2017-04-17 12:00:27 -0700[diff] [blame]14/*
15 * This driver works with very simple configuration that has the same name
16 * for group and function. This way it is compatible with the Linux Kernel
17 * driver.
18 */
19
20struct ast2500_pinctrl_priv {
21 struct ast2500_scu *scu;
22};
23
24static int ast2500_pinctrl_probe(struct udevice *dev)
25{
26 struct ast2500_pinctrl_priv *priv = dev_get_priv(dev);
27
28 priv->scu = ast_get_scu();
29
30 return 0;
31}
32
33struct ast2500_group_config {
34 char *group_name;
35 /* Control register number (1-10) */
36 unsigned reg_num;
37 /* The mask of control bits in the register */
38 u32 ctrl_bit_mask;
39};
40
41static const struct ast2500_group_config ast2500_groups[] = {
42 { "I2C1", 8, (1 << 13) | (1 << 12) },
43 { "I2C2", 8, (1 << 15) | (1 << 14) },
44 { "I2C3", 8, (1 << 16) },
45 { "I2C4", 5, (1 << 17) },
46 { "I2C4", 5, (1 << 17) },
47 { "I2C5", 5, (1 << 18) },
48 { "I2C6", 5, (1 << 19) },
49 { "I2C7", 5, (1 << 20) },
50 { "I2C8", 5, (1 << 21) },
51 { "I2C9", 5, (1 << 22) },
52 { "I2C10", 5, (1 << 23) },
53 { "I2C11", 5, (1 << 24) },
54 { "I2C12", 5, (1 << 25) },
55 { "I2C13", 5, (1 << 26) },
56 { "I2C14", 5, (1 << 27) },
57 { "MAC1LINK", 1, (1 << 0) },
58 { "MDIO1", 3, (1 << 31) | (1 << 30) },
59 { "MAC2LINK", 1, (1 << 1) },
60 { "MDIO2", 5, (1 << 2) },
61};
62
63static int ast2500_pinctrl_get_groups_count(struct udevice *dev)
64{
65 debug("PINCTRL: get_(functions/groups)_count\n");
66
67 return ARRAY_SIZE(ast2500_groups);
68}
69
70static const char *ast2500_pinctrl_get_group_name(struct udevice *dev,
71 unsigned selector)
72{
73 debug("PINCTRL: get_(function/group)_name %u\n", selector);
74
75 return ast2500_groups[selector].group_name;
76}
77
78static int ast2500_pinctrl_group_set(struct udevice *dev, unsigned selector,
79 unsigned func_selector)
80{
81 struct ast2500_pinctrl_priv *priv = dev_get_priv(dev);
82 const struct ast2500_group_config *config;
83 u32 *ctrl_reg;
84
85 debug("PINCTRL: group_set <%u, %u>\n", selector, func_selector);
86 if (selector >= ARRAY_SIZE(ast2500_groups))
87 return -EINVAL;
88
89 config = &ast2500_groups[selector];
90 if (config->reg_num > 6)
91 ctrl_reg = &priv->scu->pinmux_ctrl1[config->reg_num - 7];
92 else
93 ctrl_reg = &priv->scu->pinmux_ctrl[config->reg_num - 1];
94
95 ast_scu_unlock(priv->scu);
96 setbits_le32(ctrl_reg, config->ctrl_bit_mask);
97 ast_scu_lock(priv->scu);
98
99 return 0;
100}
101
102static struct pinctrl_ops ast2500_pinctrl_ops = {
103 .set_state = pinctrl_generic_set_state,
104 .get_groups_count = ast2500_pinctrl_get_groups_count,
105 .get_group_name = ast2500_pinctrl_get_group_name,
106 .get_functions_count = ast2500_pinctrl_get_groups_count,
107 .get_function_name = ast2500_pinctrl_get_group_name,
108 .pinmux_group_set = ast2500_pinctrl_group_set,
109};
110
111static const struct udevice_id ast2500_pinctrl_ids[] = {
112 { .compatible = "aspeed,ast2500-pinctrl" },
113 { .compatible = "aspeed,g5-pinctrl" },
114 { }
115};
116
117U_BOOT_DRIVER(pinctrl_ast2500) = {
118 .name = "aspeed_ast2500_pinctrl",
119 .id = UCLASS_PINCTRL,
120 .of_match = ast2500_pinctrl_ids,
121 .priv_auto_alloc_size = sizeof(struct ast2500_pinctrl_priv),
122 .ops = &ast2500_pinctrl_ops,
123 .probe = ast2500_pinctrl_probe,
124};