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gerrit-public.fairphone.software / kernel / msm-4.19 / 32cfe344b002b4d6fe6852a006a9ef3c9ccdb545 / . / arch / arm / mach-pnx4008 / i2c.c
blob: 6f308827c4fe32382667aa8565a8d019abc32a4f [file] [log] [blame]
Vitaly Wool41561f22006-12-10 21:21:29 +0100[diff] [blame]1/*
2 * I2C initialization for PNX4008.
3 *
4 * Author: Vitaly Wool <vitalywool@gmail.com>
5 *
6 * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 */
11
12#include <linux/clk.h>
13#include <linux/i2c.h>
14#include <linux/i2c-pnx.h>
15#include <linux/platform_device.h>
16#include <linux/err.h>
17#include <asm/arch/platform.h>
18#include <asm/arch/i2c.h>
19
20static int set_clock_run(struct platform_device *pdev)
21{
22 struct clk *clk;
23 char name[10];
24 int retval = 0;
25
26 snprintf(name, 10, "i2c%d_ck", pdev->id);
27 clk = clk_get(&pdev->dev, name);
28 if (!IS_ERR(clk)) {
29 clk_set_rate(clk, 1);
30 clk_put(clk);
31 } else
32 retval = -ENOENT;
33
34 return retval;
35}
36
37static int set_clock_stop(struct platform_device *pdev)
38{
39 struct clk *clk;
40 char name[10];
41 int retval = 0;
42
43 snprintf(name, 10, "i2c%d_ck", pdev->id);
44 clk = clk_get(&pdev->dev, name);
45 if (!IS_ERR(clk)) {
46 clk_set_rate(clk, 0);
47 clk_put(clk);
48 } else
49 retval = -ENOENT;
50
51 return retval;
52}
53
54static int i2c_pnx_suspend(struct platform_device *pdev, pm_message_t state)
55{
56 int retval = 0;
57#ifdef CONFIG_PM
58 retval = set_clock_run(pdev);
59#endif
60 return retval;
61}
62
63static int i2c_pnx_resume(struct platform_device *pdev)
64{
65 int retval = 0;
66#ifdef CONFIG_PM
67 retval = set_clock_run(pdev);
68#endif
69 return retval;
70}
71
72static u32 calculate_input_freq(struct platform_device *pdev)
73{
74 return HCLK_MHZ;
75}
76
77
78static struct i2c_pnx_algo_data pnx_algo_data0 = {
79 .base = PNX4008_I2C1_BASE,
80 .irq = I2C_1_INT,
81};
82
83static struct i2c_pnx_algo_data pnx_algo_data1 = {
84 .base = PNX4008_I2C2_BASE,
85 .irq = I2C_2_INT,
86};
87
88static struct i2c_pnx_algo_data pnx_algo_data2 = {
89 .base = (PNX4008_USB_CONFIG_BASE + 0x300),
90 .irq = USB_I2C_INT,
91};
92
93static struct i2c_adapter pnx_adapter0 = {
94 .name = I2C_CHIP_NAME "0",
95 .algo_data = &pnx_algo_data0,
96};
97static struct i2c_adapter pnx_adapter1 = {
98 .name = I2C_CHIP_NAME "1",
99 .algo_data = &pnx_algo_data1,
100};
101
102static struct i2c_adapter pnx_adapter2 = {
103 .name = "USB-I2C",
104 .algo_data = &pnx_algo_data2,
105};
106
107static struct i2c_pnx_data i2c0_data = {
108 .suspend = i2c_pnx_suspend,
109 .resume = i2c_pnx_resume,
110 .calculate_input_freq = calculate_input_freq,
111 .set_clock_run = set_clock_run,
112 .set_clock_stop = set_clock_stop,
113 .adapter = &pnx_adapter0,
114};
115
116static struct i2c_pnx_data i2c1_data = {
117 .suspend = i2c_pnx_suspend,
118 .resume = i2c_pnx_resume,
119 .calculate_input_freq = calculate_input_freq,
120 .set_clock_run = set_clock_run,
121 .set_clock_stop = set_clock_stop,
122 .adapter = &pnx_adapter1,
123};
124
125static struct i2c_pnx_data i2c2_data = {
126 .suspend = i2c_pnx_suspend,
127 .resume = i2c_pnx_resume,
128 .calculate_input_freq = calculate_input_freq,
129 .set_clock_run = set_clock_run,
130 .set_clock_stop = set_clock_stop,
131 .adapter = &pnx_adapter2,
132};
133
134static struct platform_device i2c0_device = {
135 .name = "pnx-i2c",
136 .id = 0,
137 .dev = {
138 .platform_data = &i2c0_data,
139 },
140};
141
142static struct platform_device i2c1_device = {
143 .name = "pnx-i2c",
144 .id = 1,
145 .dev = {
146 .platform_data = &i2c1_data,
147 },
148};
149
150static struct platform_device i2c2_device = {
151 .name = "pnx-i2c",
152 .id = 2,
153 .dev = {
154 .platform_data = &i2c2_data,
155 },
156};
157
158static struct platform_device *devices[] __initdata = {
159 &i2c0_device,
160 &i2c1_device,
161 &i2c2_device,
162};
163
164void __init pnx4008_register_i2c_devices(void)
165{
166 platform_add_devices(devices, ARRAY_SIZE(devices));
167}