diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-pxa.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-pxa.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 14e83d0aac8..873544ab598 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -539,6 +539,18 @@ static inline void i2c_pxa_start_message(struct pxa_i2c *i2c) writel(icr | ICR_START | ICR_TB, _ICR(i2c)); } +static inline void i2c_pxa_stop_message(struct pxa_i2c *i2c) +{ + u32 icr; + + /* + * Clear the STOP and ACK flags + */ + icr = readl(_ICR(i2c)); + icr &= ~(ICR_STOP | ICR_ACKNAK); + writel(icr, _IRC(i2c)); +} + /* * We are protected by the adapter bus mutex. */ @@ -581,6 +593,7 @@ static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num) * The rest of the processing occurs in the interrupt handler. */ timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); + i2c_pxa_stop_message(i2c); /* * We place the return code in i2c->msg_idx. @@ -825,7 +838,7 @@ static const struct i2c_algorithm i2c_pxa_algorithm = { }; static struct pxa_i2c i2c_pxa = { - .lock = SPIN_LOCK_UNLOCKED, + .lock = __SPIN_LOCK_UNLOCKED(i2c_pxa.lock), .adap = { .owner = THIS_MODULE, .algo = &i2c_pxa_algorithm, @@ -839,9 +852,7 @@ static int i2c_pxa_probe(struct platform_device *dev) { struct pxa_i2c *i2c = &i2c_pxa; struct resource *res; -#ifdef CONFIG_I2C_PXA_SLAVE struct i2c_pxa_platform_data *plat = dev->dev.platform_data; -#endif int ret; int irq; @@ -889,14 +900,14 @@ static int i2c_pxa_probe(struct platform_device *dev) pxa_gpio_mode(GPIO117_I2CSCL_MD); pxa_gpio_mode(GPIO118_I2CSDA_MD); #endif - pxa_set_cken(CKEN14_I2C, 1); + pxa_set_cken(CKEN_I2C, 1); break; #ifdef CONFIG_PXA27x case 1: local_irq_disable(); PCFR |= PCFR_PI2CEN; local_irq_enable(); - pxa_set_cken(CKEN15_PWRI2C, 1); + pxa_set_cken(CKEN_PWRI2C, 1); #endif } @@ -911,6 +922,10 @@ static int i2c_pxa_probe(struct platform_device *dev) i2c->adap.algo_data = i2c; i2c->adap.dev.parent = &dev->dev; + if (plat) { + i2c->adap.class = plat->class; + } + ret = i2c_add_adapter(&i2c->adap); if (ret < 0) { printk(KERN_INFO "I2C: Failed to add bus\n"); @@ -933,11 +948,11 @@ eadapt: ereqirq: switch (dev->id) { case 0: - pxa_set_cken(CKEN14_I2C, 0); + pxa_set_cken(CKEN_I2C, 0); break; #ifdef CONFIG_PXA27x case 1: - pxa_set_cken(CKEN15_PWRI2C, 0); + pxa_set_cken(CKEN_PWRI2C, 0); local_irq_disable(); PCFR &= ~PCFR_PI2CEN; local_irq_enable(); @@ -960,11 +975,11 @@ static int i2c_pxa_remove(struct platform_device *dev) free_irq(i2c->irq, i2c); switch (dev->id) { case 0: - pxa_set_cken(CKEN14_I2C, 0); + pxa_set_cken(CKEN_I2C, 0); break; #ifdef CONFIG_PXA27x case 1: - pxa_set_cken(CKEN15_PWRI2C, 0); + pxa_set_cken(CKEN_PWRI2C, 0); local_irq_disable(); PCFR &= ~PCFR_PI2CEN; local_irq_enable(); |