*
* History:
* Apr 2002: Initial version [CS]
- * Jun 2002: Properly seperated algo/adap [FB]
+ * Jun 2002: Properly separated algo/adap [FB]
* Jan 2003: Fixed several bugs concerning interrupt handling [Kai-Uwe Bloem]
* Jan 2003: added limited signal handling [Kai-Uwe Bloem]
* Sep 2004: Major rework to ensure efficient bus handling [RMK]
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/clk.h>
+#include <linux/slab.h>
-#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <mach/i2c.h>
+#include <plat/i2c.h>
+
+/*
+ * I2C register offsets will be shifted 0 or 1 bit left, depending on
+ * different SoCs
+ */
+#define REG_SHIFT_0 (0 << 0)
+#define REG_SHIFT_1 (1 << 0)
+#define REG_SHIFT(d) ((d) & 0x1)
+
+static const struct platform_device_id i2c_pxa_id_table[] = {
+ { "pxa2xx-i2c", REG_SHIFT_1 },
+ { "pxa3xx-pwri2c", REG_SHIFT_0 },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
/*
* I2C registers and bit definitions
static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why)
{
unsigned int i;
- printk("i2c: error: %s\n", why);
- printk("i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n",
+ printk(KERN_ERR "i2c: error: %s\n", why);
+ printk(KERN_ERR "i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n",
i2c->msg_num, i2c->msg_idx, i2c->msg_ptr);
- printk("i2c: ICR: %08x ISR: %08x\n"
- "i2c: log: ", readl(_ICR(i2c)), readl(_ISR(i2c)));
+ printk(KERN_ERR "i2c: ICR: %08x ISR: %08x\n",
+ readl(_ICR(i2c)), readl(_ISR(i2c)));
+ printk(KERN_DEBUG "i2c: log: ");
for (i = 0; i < i2c->irqlogidx; i++)
printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]);
printk("\n");
show_state(i2c);
}
- if (timeout <= 0)
+ if (timeout < 0)
show_state(i2c);
- return timeout <= 0 ? I2C_RETRY : 0;
+ return timeout < 0 ? I2C_RETRY : 0;
}
static int i2c_pxa_wait_master(struct pxa_i2c *i2c)
show_state(i2c);
}
- if (timeout <= 0) {
+ if (timeout < 0) {
show_state(i2c);
dev_err(&i2c->adap.dev,
"i2c_pxa: timeout waiting for bus free\n");
i2c_pxa_start_message(i2c);
- while (timeout-- && i2c->msg_num > 0) {
+ while (i2c->msg_num > 0 && --timeout) {
i2c_pxa_handler(0, i2c);
udelay(10);
}
.functionality = i2c_pxa_functionality,
};
-#define res_len(r) ((r)->end - (r)->start + 1)
static int i2c_pxa_probe(struct platform_device *dev)
{
struct pxa_i2c *i2c;
struct resource *res;
struct i2c_pxa_platform_data *plat = dev->dev.platform_data;
+ struct platform_device_id *id = platform_get_device_id(dev);
int ret;
int irq;
if (res == NULL || irq < 0)
return -ENODEV;
- if (!request_mem_region(res->start, res_len(res), res->name))
+ if (!request_mem_region(res->start, resource_size(res), res->name))
return -ENOMEM;
i2c = kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL);
goto eclk;
}
- i2c->reg_base = ioremap(res->start, res_len(res));
+ i2c->reg_base = ioremap(res->start, resource_size(res));
if (!i2c->reg_base) {
ret = -EIO;
goto eremap;
}
- i2c->reg_shift = (cpu_is_pxa3xx() && (dev->id == 1)) ? 0 : 1;
+ i2c->reg_shift = REG_SHIFT(id->driver_data);
i2c->iobase = res->start;
- i2c->iosize = res_len(res);
+ i2c->iosize = resource_size(res);
i2c->irq = irq;
eclk:
kfree(i2c);
emalloc:
- release_mem_region(res->start, res_len(res));
+ release_mem_region(res->start, resource_size(res));
return ret;
}
}
#ifdef CONFIG_PM
-static int i2c_pxa_suspend_late(struct platform_device *dev, pm_message_t state)
+static int i2c_pxa_suspend_noirq(struct device *dev)
{
- struct pxa_i2c *i2c = platform_get_drvdata(dev);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct pxa_i2c *i2c = platform_get_drvdata(pdev);
+
clk_disable(i2c->clk);
+
return 0;
}
-static int i2c_pxa_resume_early(struct platform_device *dev)
+static int i2c_pxa_resume_noirq(struct device *dev)
{
- struct pxa_i2c *i2c = platform_get_drvdata(dev);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct pxa_i2c *i2c = platform_get_drvdata(pdev);
clk_enable(i2c->clk);
i2c_pxa_reset(i2c);
return 0;
}
+
+static const struct dev_pm_ops i2c_pxa_dev_pm_ops = {
+ .suspend_noirq = i2c_pxa_suspend_noirq,
+ .resume_noirq = i2c_pxa_resume_noirq,
+};
+
+#define I2C_PXA_DEV_PM_OPS (&i2c_pxa_dev_pm_ops)
#else
-#define i2c_pxa_suspend_late NULL
-#define i2c_pxa_resume_early NULL
+#define I2C_PXA_DEV_PM_OPS NULL
#endif
static struct platform_driver i2c_pxa_driver = {
.probe = i2c_pxa_probe,
.remove = __exit_p(i2c_pxa_remove),
- .suspend_late = i2c_pxa_suspend_late,
- .resume_early = i2c_pxa_resume_early,
.driver = {
.name = "pxa2xx-i2c",
.owner = THIS_MODULE,
+ .pm = I2C_PXA_DEV_PM_OPS,
},
+ .id_table = i2c_pxa_id_table,
};
static int __init i2c_adap_pxa_init(void)