static int __init i2c_davinci_init(void)
{
int status;
struct device *dev = NULL;
DEB0("%s %s", __TIME__, __DATE__);
DEB1("i2c_davinci_init()\n");
davinci_i2c_fix_ths7353_lockup( );
#if 0
if (i2c_davinci_busFreq > 200)
i2c_davinci_busFreq = 400; /*Fast mode */
else
i2c_davinci_busFreq = 100; /*Standard mode */
#endif
i2c_clock = clk_get (dev, "I2CCLK");
if (i2c_clock == NULL)
return -1;
clk_use (i2c_clock);
clk_enable (i2c_clock);
i2c_davinci_inputClock = clk_get_rate (i2c_clock);
DEB1 ("IP CLOCK = %ld\n", i2c_davinci_inputClock);
memset(&i2c_davinci_dev, 0, sizeof(i2c_davinci_dev));
i2c_davinci_dev.regs = (davinci_i2cregsovly)I2C_BASE;
status = (int)request_region(I2C_BASE, I2C_IOSIZE, MODULE_NAME);
if (!status) {
i2c_err("I2C is already in use\n");
return -ENODEV;
}
status = request_irq(IRQ_I2C, i2c_davinci_isr, 0, MODULE_NAME,
&i2c_davinci_dev);
if (status) {
i2c_err("failed to request I2C IRQ");
goto do_release_region;
}
i2c_set_adapdata(&i2c_davinci_adap, &i2c_davinci_dev);
status = i2c_add_adapter(&i2c_davinci_adap);
if (status) {
i2c_err("failed to add adapter");
goto do_free_irq;
return status;
}
i2c_davinci_reset(&i2c_davinci_dev);
if (driver_register(&davinci_i2c_driver) != 0)
printk(KERN_ERR "Driver register failed for davinci_i2c\n");
if (platform_device_register(&davinci_i2c_device) != 0) {
printk(KERN_ERR "Device register failed for i2c\n");
driver_unregister(&davinci_i2c_driver);
}
return 0;
do_free_irq:
free_irq(IRQ_I2C, &i2c_davinci_dev);
do_release_region:
release_region(I2C_BASE, I2C_IOSIZE);
return status;
}
static int __init i2c_davinci_init(void)
{
int status;
struct device *dev = NULL;
DEB0("%s %s", __TIME__, __DATE__);
DEB1("i2c_davinci_init()");
if (cpu_is_davinci_dm6467())
davinci_i2c_expander_op (0x3A, I2C_INT_DM646X, 0);
/*
* NOTE: On DaVinci EVM, the i2c bus frequency is set to 20kHz
* so that the MSP430, which is doing software i2c, has
* some extra processing time
*/
if (machine_is_davinci_evm())
i2c_davinci_busFreq = 20;
else if (machine_is_davinci_dm6467_evm())
i2c_davinci_busFreq = 100;
else if (i2c_davinci_busFreq > 200)
i2c_davinci_busFreq = 400; /*Fast mode */
else
i2c_davinci_busFreq = 100; /*Standard mode */
i2c_clock = clk_get (dev, "I2CCLK");
if (IS_ERR(i2c_clock))
return -1;
clk_use (i2c_clock);
clk_enable (i2c_clock);
i2c_davinci_inputClock = clk_get_rate (i2c_clock);
DEB1 ("IP CLOCK = %ld", i2c_davinci_inputClock);
memset(&i2c_davinci_dev, 0, sizeof(i2c_davinci_dev));
init_waitqueue_head(&i2c_davinci_dev.cmd_wait);
i2c_davinci_dev.regs = (davinci_i2cregsovly)I2C_BASE;
status = (int)request_region(I2C_BASE, I2C_IOSIZE, MODULE_NAME);
if (!status) {
i2c_err("I2C is already in use\n");
return -ENODEV;
}
status = request_irq(IRQ_I2C, i2c_davinci_isr, 0, "i2c",
&i2c_davinci_dev);
if (status) {
i2c_err("failed to request I2C IRQ");
goto do_release_region;
}
i2c_set_adapdata(&i2c_davinci_adap, &i2c_davinci_dev);
status = i2c_add_adapter(&i2c_davinci_adap);
if (status) {
i2c_err("failed to add adapter");
goto do_free_irq;
}
i2c_davinci_reset(&i2c_davinci_dev);
if (driver_register(&davinci_i2c_driver) != 0)
printk(KERN_ERR "Driver register failed for davinci_i2c\n");
if (platform_device_register(&davinci_i2c_device) != 0) {
printk(KERN_ERR "Device register failed for i2c\n");
driver_unregister(&davinci_i2c_driver);
}
return 0;
do_free_irq:
free_irq(IRQ_I2C, &i2c_davinci_dev);
do_release_region:
release_region(I2C_BASE, I2C_IOSIZE);
return status;
}