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Diffstat (limited to 'drivers/i2c/busses')
-rw-r--r--drivers/i2c/busses/i2c-designware-core.c14
-rw-r--r--drivers/i2c/busses/i2c-designware-core.h2
-rw-r--r--drivers/i2c/busses/i2c-designware-platdrv.c1
-rw-r--r--drivers/i2c/busses/i2c-i801.c6
-rw-r--r--drivers/i2c/busses/i2c-mv64xxx.c8
-rw-r--r--drivers/i2c/busses/i2c-s3c2410.c5
-rw-r--r--drivers/i2c/busses/i2c-sirf.c6
-rw-r--r--drivers/i2c/busses/i2c-tegra.c5
8 files changed, 24 insertions, 23 deletions
diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index 21fbb340ad66..c41ca6354fc5 100644
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -383,7 +383,8 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev)
/* Enable the adapter */
__i2c_dw_enable(dev, true);
- /* Enable interrupts */
+ /* Clear and enable interrupts */
+ i2c_dw_clear_int(dev);
dw_writel(dev, DW_IC_INTR_DEFAULT_MASK, DW_IC_INTR_MASK);
}
@@ -448,8 +449,14 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
cmd |= BIT(9);
if (msgs[dev->msg_write_idx].flags & I2C_M_RD) {
+
+ /* avoid rx buffer overrun */
+ if (rx_limit - dev->rx_outstanding <= 0)
+ break;
+
dw_writel(dev, cmd | 0x100, DW_IC_DATA_CMD);
rx_limit--;
+ dev->rx_outstanding++;
} else
dw_writel(dev, cmd | *buf++, DW_IC_DATA_CMD);
tx_limit--; buf_len--;
@@ -502,8 +509,10 @@ i2c_dw_read(struct dw_i2c_dev *dev)
rx_valid = dw_readl(dev, DW_IC_RXFLR);
- for (; len > 0 && rx_valid > 0; len--, rx_valid--)
+ for (; len > 0 && rx_valid > 0; len--, rx_valid--) {
*buf++ = dw_readl(dev, DW_IC_DATA_CMD);
+ dev->rx_outstanding--;
+ }
if (len > 0) {
dev->status |= STATUS_READ_IN_PROGRESS;
@@ -561,6 +570,7 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
dev->msg_err = 0;
dev->status = STATUS_IDLE;
dev->abort_source = 0;
+ dev->rx_outstanding = 0;
ret = i2c_dw_wait_bus_not_busy(dev);
if (ret < 0)
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 9c1840ee09c7..e761ad18dd61 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -60,6 +60,7 @@
* @adapter: i2c subsystem adapter node
* @tx_fifo_depth: depth of the hardware tx fifo
* @rx_fifo_depth: depth of the hardware rx fifo
+ * @rx_outstanding: current master-rx elements in tx fifo
*/
struct dw_i2c_dev {
struct device *dev;
@@ -88,6 +89,7 @@ struct dw_i2c_dev {
u32 master_cfg;
unsigned int tx_fifo_depth;
unsigned int rx_fifo_depth;
+ int rx_outstanding;
};
#define ACCESS_SWAP 0x00000001
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 8ec91335d95a..35b70a1edf57 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -69,6 +69,7 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
static const struct acpi_device_id dw_i2c_acpi_match[] = {
{ "INT33C2", 0 },
{ "INT33C3", 0 },
+ { "80860F41", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match);
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index e1cf2e0e1f23..3a6903f63913 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -231,7 +231,11 @@ static const char *i801_feature_names[] = {
static unsigned int disable_features;
module_param(disable_features, uint, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(disable_features, "Disable selected driver features");
+MODULE_PARM_DESC(disable_features, "Disable selected driver features:\n"
+ "\t\t 0x01 disable SMBus PEC\n"
+ "\t\t 0x02 disable the block buffer\n"
+ "\t\t 0x08 disable the I2C block read functionality\n"
+ "\t\t 0x10 don't use interrupts ");
/* Make sure the SMBus host is ready to start transmitting.
Return 0 if it is, -EBUSY if it is not. */
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 3bbd65d35a5e..1a3abd6a0bfc 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -252,7 +252,7 @@ mv64xxx_i2c_do_action(struct mv64xxx_i2c_data *drv_data)
writel(drv_data->cntl_bits,
drv_data->reg_base + MV64XXX_I2C_REG_CONTROL);
drv_data->block = 0;
- wake_up_interruptible(&drv_data->waitq);
+ wake_up(&drv_data->waitq);
break;
case MV64XXX_I2C_ACTION_CONTINUE:
@@ -300,7 +300,7 @@ mv64xxx_i2c_do_action(struct mv64xxx_i2c_data *drv_data)
writel(drv_data->cntl_bits | MV64XXX_I2C_REG_CONTROL_STOP,
drv_data->reg_base + MV64XXX_I2C_REG_CONTROL);
drv_data->block = 0;
- wake_up_interruptible(&drv_data->waitq);
+ wake_up(&drv_data->waitq);
break;
case MV64XXX_I2C_ACTION_INVALID:
@@ -315,7 +315,7 @@ mv64xxx_i2c_do_action(struct mv64xxx_i2c_data *drv_data)
writel(drv_data->cntl_bits | MV64XXX_I2C_REG_CONTROL_STOP,
drv_data->reg_base + MV64XXX_I2C_REG_CONTROL);
drv_data->block = 0;
- wake_up_interruptible(&drv_data->waitq);
+ wake_up(&drv_data->waitq);
break;
}
}
@@ -381,7 +381,7 @@ mv64xxx_i2c_wait_for_completion(struct mv64xxx_i2c_data *drv_data)
unsigned long flags;
char abort = 0;
- time_left = wait_event_interruptible_timeout(drv_data->waitq,
+ time_left = wait_event_timeout(drv_data->waitq,
!drv_data->block, drv_data->adapter.timeout);
spin_lock_irqsave(&drv_data->lock, flags);
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 6e8ee92ab553..cab1c91b75a3 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -1082,11 +1082,6 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
/* map the registers */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- dev_err(&pdev->dev, "cannot find IO resource\n");
- return -ENOENT;
- }
-
i2c->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(i2c->regs))
diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c
index 5a7ad240bd26..a63c7d506836 100644
--- a/drivers/i2c/busses/i2c-sirf.c
+++ b/drivers/i2c/busses/i2c-sirf.c
@@ -303,12 +303,6 @@ static int i2c_sirfsoc_probe(struct platform_device *pdev)
adap->class = I2C_CLASS_HWMON;
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (mem_res == NULL) {
- dev_err(&pdev->dev, "Unable to get MEM resource\n");
- err = -EINVAL;
- goto out;
- }
-
siic->base = devm_ioremap_resource(&pdev->dev, mem_res);
if (IS_ERR(siic->base)) {
err = PTR_ERR(siic->base);
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index b60ff90adc39..9aa1b60f7fdd 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -714,11 +714,6 @@ static int tegra_i2c_probe(struct platform_device *pdev)
int ret = 0;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no mem resource\n");
- return -EINVAL;
- }
-
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-06 23:53:03 +0300