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authorVitaly Wool <vitalywool@gmail.com>2006-12-10 15:21:29 -0500
committerJean Delvare <khali@arrakis.delvare>2006-12-10 15:21:29 -0500
commit41561f28e76a47dc6de0a954da85d0b5c42874eb (patch)
tree0113700403e5fffb57ee41b564ea68bcaab311d9 /arch/arm/mach-pnx4008
parent51fd554b6547b74c7e6d1f52885ba8532b531023 (diff)
i2c: New Philips PNX bus driver
New I2C bus driver for Philips ARM boards (Philips IP3204 I2C IP block). This I2C controller can be found on (at least) PNX010x, PNX52xx and PNX4008 Philips boards. Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'arch/arm/mach-pnx4008')
-rw-r--r--arch/arm/mach-pnx4008/Makefile2
-rw-r--r--arch/arm/mach-pnx4008/i2c.c167
2 files changed, 168 insertions, 1 deletions
diff --git a/arch/arm/mach-pnx4008/Makefile b/arch/arm/mach-pnx4008/Makefile
index b457ca0a431a..777564c90a12 100644
--- a/arch/arm/mach-pnx4008/Makefile
+++ b/arch/arm/mach-pnx4008/Makefile
@@ -2,7 +2,7 @@
2# Makefile for the linux kernel. 2# Makefile for the linux kernel.
3# 3#
4 4
5obj-y := core.o irq.o time.o clock.o gpio.o serial.o dma.o 5obj-y := core.o irq.o time.o clock.o gpio.o serial.o dma.o i2c.o
6obj-m := 6obj-m :=
7obj-n := 7obj-n :=
8obj- := 8obj- :=
diff --git a/arch/arm/mach-pnx4008/i2c.c b/arch/arm/mach-pnx4008/i2c.c
new file mode 100644
index 000000000000..6f308827c4fe
--- /dev/null
+++ b/arch/arm/mach-pnx4008/i2c.c
@@ -0,0 +1,167 @@
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}