/*
* I2C initialization for PNX4008.
*
* Author: Vitaly Wool <vitalywool@gmail.com>
*
* 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/i2c-pnx.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <asm/arch/platform.h>
#include <asm/arch/i2c.h>
static int set_clock_run(struct platform_device *pdev)
{
struct clk *clk;
char name[10];
int retval = 0;
snprintf(name, 10, "i2c%d_ck", pdev->id);
clk = clk_get(&pdev->dev, name);
if (!IS_ERR(clk)) {
clk_set_rate(clk, 1);
clk_put(clk);
} else
retval = -ENOENT;
return retval;
}
static int set_clock_stop(struct platform_device *pdev)
{
struct clk *clk;
char name[10];
int retval = 0;
snprintf(name, 10, "i2c%d_ck", pdev->id);
clk = clk_get(&pdev->dev, name);
if (!IS_ERR(clk)) {
clk_set_rate(clk, 0);
clk_put(clk);
} else
retval = -ENOENT;
return retval;
}
static int i2c_pnx_suspend(struct platform_device *pdev, pm_message_t state)
{
int retval = 0;
#ifdef CONFIG_PM
retval = set_clock_run(pdev);
#endif
return retval;
}
static int i2c_pnx_resume(struct platform_device *pdev)
{
int retval = 0;
#ifdef CONFIG_PM
retval = set_clock_run(pdev);
#endif
return retval;
}
static u32 calculate_input_freq(struct platform_device *pdev)
{
return HCLK_MHZ;
}
static struct i2c_pnx_algo_data pnx_algo_data0 = {
.base = PNX4008_I2C1_BASE,
.irq = I2C_1_INT,
};
static struct i2c_pnx_algo_data pnx_algo_data1 = {
.base = PNX4008_I2C2_BASE,
.irq = I2C_2_INT,
};
static struct i2c_pnx_algo_data pnx_algo_data2 = {
.base = (PNX4008_USB_CONFIG_BASE + 0x300),
.irq = USB_I2C_INT,
};
static struct i2c_adapter pnx_adapter0 = {
.name = I2C_CHIP_NAME "0",
.algo_data = &pnx_algo_data0,
};
static struct i2c_adapter pnx_adapter1 = {
.name = I2C_CHIP_NAME "1",
.algo_data = &pnx_algo_data1,
};
static struct i2c_adapter pnx_adapter2 = {
.name = "USB-I2C",
.algo_data = &pnx_algo_data2,
};
static struct i2c_pnx_data i2c0_data = {
.suspend = i2c_pnx_suspend,
.resume = i2c_pnx_resume,
.calculate_input_freq = calculate_input_freq,
.set_clock_run = set_clock_run,
.set_clock_stop = set_clock_stop,
.adapter = &pnx_adapter0,
};
static struct i2c_pnx_data i2c1_data = {
.suspend = i2c_pnx_suspend,
.resume = i2c_pnx_resume,
.calculate_input_freq = calculate_input_freq,
.set_clock_run = set_clock_run,
.set_clock_stop = set_clock_stop,
.adapter = &pnx_adapter1,
};
static struct i2c_pnx_data i2c2_data = {
.suspend = i2c_pnx_suspend,
.resume = i2c_pnx_resume,
.calculate_input_freq = calculate_input_freq,
.set_clock_run = set_clock_run,
.set_clock_stop = set_clock_stop,
.adapter = &pnx_adapter2,
};
static struct platform_device i2c0_device = {
.name = "pnx-i2c",
.id = 0,
.dev = {
.platform_data = &i2c0_data,
},
};
static struct platform_device i2c1_device = {
.name = "pnx-i2c",
.id = 1,
.dev = {
.platform_data = &i2c1_data,
},
};
static struct platform_device i2c2_device = {
.name = "pnx-i2c",
.id = 2,
.dev = {
.platform_data = &i2c2_data,
},
};
static struct platform_device *devices[] __initdata = {
&i2c0_device,
&i2c1_device,
&i2c2_device,
};
void __init pnx4008_register_i2c_devices(void)
{
platform_add_devices(devices, ARRAY_SIZE(devices));
}
