#include <linux/clk.h>
#include <linux/cpufreq.h>
-#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <mach/regs-gpio.h>
-#include <asm/plat-s3c/regs-iic.h>
-#include <asm/plat-s3c/iic.h>
+#include <plat/regs-iic.h>
+#include <plat/iic.h>
/* i2c controller state */
struct s3c24xx_i2c {
spinlock_t lock;
wait_queue_head_t wait;
+ unsigned int suspended:1;
struct i2c_msg *msg;
unsigned int msg_num;
unsigned int msg_ptr;
unsigned int tx_setup;
+ unsigned int irq;
enum s3c24xx_i2c_state state;
unsigned long clkrate;
void __iomem *regs;
struct clk *clk;
struct device *dev;
- struct resource *irq;
struct resource *ioarea;
struct i2c_adapter adap;
#endif
};
-/* default platform data to use if not supplied in the platform_device
-*/
-
-static struct s3c2410_platform_i2c s3c24xx_i2c_default_platform = {
- .flags = 0,
- .slave_addr = 0x10,
- .bus_freq = 100*1000,
- .max_freq = 400*1000,
- .sda_delay = S3C2410_IICLC_SDA_DELAY5 | S3C2410_IICLC_FILTER_ON,
-};
+/* default platform data removed, dev should always carry data. */
/* s3c24xx_i2c_is2440()
*
return !strcmp(pdev->name, "s3c2440-i2c");
}
-
-/* s3c24xx_i2c_get_platformdata
- *
- * get the platform data associated with the given device, or return
- * the default if there is none
-*/
-
-static inline struct s3c2410_platform_i2c *
-s3c24xx_i2c_get_platformdata(struct device *dev)
-{
- if (dev->platform_data != NULL)
- return (struct s3c2410_platform_i2c *)dev->platform_data;
-
- return &s3c24xx_i2c_default_platform;
-}
-
/* s3c24xx_i2c_master_complete
*
* complete the message and wake up the caller, using the given return code,
msleep(1);
}
- dev_dbg(i2c->dev, "timeout: GPEDAT is %08x\n",
- __raw_readl(S3C2410_GPEDAT));
-
return -ETIMEDOUT;
}
unsigned long timeout;
int ret;
- if (!(readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN))
+ if (i2c->suspended)
return -EIO;
ret = s3c24xx_i2c_set_master(i2c);
.functionality = s3c24xx_i2c_func,
};
-static struct s3c24xx_i2c s3c24xx_i2c = {
- .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_i2c.lock),
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER(s3c24xx_i2c.wait),
- .tx_setup = 50,
- .adap = {
- .name = "s3c2410-i2c",
- .owner = THIS_MODULE,
- .algo = &s3c24xx_i2c_algorithm,
- .retries = 2,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- },
-};
-
/* s3c24xx_i2c_calcdivisor
*
* return the divisor settings for a given frequency
static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got)
{
- struct s3c2410_platform_i2c *pdata;
+ struct s3c2410_platform_i2c *pdata = i2c->dev->platform_data;
unsigned long clkin = clk_get_rate(i2c->clk);
unsigned int divs, div1;
u32 iiccon;
int start, end;
i2c->clkrate = clkin;
-
- pdata = s3c24xx_i2c_get_platformdata(i2c->adap.dev.parent);
clkin /= 1000; /* clkin now in KHz */
dev_dbg(i2c->dev, "pdata %p, freq %lu %lu..%lu\n",
/* get the plafrom data */
- pdata = s3c24xx_i2c_get_platformdata(i2c->adap.dev.parent);
+ pdata = i2c->dev->platform_data;
/* inititalise the gpio */
- s3c2410_gpio_cfgpin(S3C2410_GPE15, S3C2410_GPE15_IICSDA);
- s3c2410_gpio_cfgpin(S3C2410_GPE14, S3C2410_GPE14_IICSCL);
+ if (pdata->cfg_gpio)
+ pdata->cfg_gpio(to_platform_device(i2c->dev));
/* write slave address */
static int s3c24xx_i2c_probe(struct platform_device *pdev)
{
- struct s3c24xx_i2c *i2c = &s3c24xx_i2c;
+ struct s3c24xx_i2c *i2c;
struct s3c2410_platform_i2c *pdata;
struct resource *res;
int ret;
- pdata = s3c24xx_i2c_get_platformdata(&pdev->dev);
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -EINVAL;
+ }
+
+ i2c = kzalloc(sizeof(struct s3c24xx_i2c), GFP_KERNEL);
+ if (!i2c) {
+ dev_err(&pdev->dev, "no memory for state\n");
+ return -ENOMEM;
+ }
+
+ strlcpy(i2c->adap.name, "s3c2410-i2c", sizeof(i2c->adap.name));
+ i2c->adap.owner = THIS_MODULE;
+ i2c->adap.algo = &s3c24xx_i2c_algorithm;
+ i2c->adap.retries = 2;
+ i2c->adap.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+ i2c->tx_setup = 50;
+
+ spin_lock_init(&i2c->lock);
+ init_waitqueue_head(&i2c->wait);
/* find the clock and enable it */
* ensure no current IRQs pending
*/
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (res == NULL) {
+ i2c->irq = ret = platform_get_irq(pdev, 0);
+ if (ret <= 0) {
dev_err(&pdev->dev, "cannot find IRQ\n");
- ret = -ENOENT;
goto err_iomap;
}
- ret = request_irq(res->start, s3c24xx_i2c_irq, IRQF_DISABLED,
- pdev->name, i2c);
+ ret = request_irq(i2c->irq, s3c24xx_i2c_irq, IRQF_DISABLED,
+ dev_name(&pdev->dev), i2c);
if (ret != 0) {
- dev_err(&pdev->dev, "cannot claim IRQ\n");
+ dev_err(&pdev->dev, "cannot claim IRQ %d\n", i2c->irq);
goto err_iomap;
}
- i2c->irq = res;
-
- dev_dbg(&pdev->dev, "irq resource %p (%lu)\n", res,
- (unsigned long)res->start);
-
ret = s3c24xx_i2c_register_cpufreq(i2c);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register cpufreq notifier\n");
s3c24xx_i2c_deregister_cpufreq(i2c);
err_irq:
- free_irq(i2c->irq->start, i2c);
+ free_irq(i2c->irq, i2c);
err_iomap:
iounmap(i2c->regs);
clk_put(i2c->clk);
err_noclk:
+ kfree(i2c);
return ret;
}
s3c24xx_i2c_deregister_cpufreq(i2c);
i2c_del_adapter(&i2c->adap);
- free_irq(i2c->irq->start, i2c);
+ free_irq(i2c->irq, i2c);
clk_disable(i2c->clk);
clk_put(i2c->clk);
release_resource(i2c->ioarea);
kfree(i2c->ioarea);
+ kfree(i2c);
return 0;
}
#ifdef CONFIG_PM
+static int s3c24xx_i2c_suspend_late(struct platform_device *dev,
+ pm_message_t msg)
+{
+ struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
+ i2c->suspended = 1;
+ return 0;
+}
+
static int s3c24xx_i2c_resume(struct platform_device *dev)
{
struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
- if (i2c != NULL)
- s3c24xx_i2c_init(i2c);
+ i2c->suspended = 0;
+ s3c24xx_i2c_init(i2c);
return 0;
}
#else
+#define s3c24xx_i2c_suspend_late NULL
#define s3c24xx_i2c_resume NULL
#endif
static struct platform_driver s3c2410_i2c_driver = {
.probe = s3c24xx_i2c_probe,
.remove = s3c24xx_i2c_remove,
+ .suspend_late = s3c24xx_i2c_suspend_late,
.resume = s3c24xx_i2c_resume,
.driver = {
.owner = THIS_MODULE,
static struct platform_driver s3c2440_i2c_driver = {
.probe = s3c24xx_i2c_probe,
.remove = s3c24xx_i2c_remove,
+ .suspend_late = s3c24xx_i2c_suspend_late,
.resume = s3c24xx_i2c_resume,
.driver = {
.owner = THIS_MODULE,
projects / linux-2.6-omap-h63xx.git / blobdiff