diff options
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-common.c | 12 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-master.c | 6 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c index bf2a4920638a..9f8574320eb2 100644 --- a/drivers/i2c/busses/i2c-designware-common.c +++ b/drivers/i2c/busses/i2c-designware-common.c @@ -578,7 +578,12 @@ int i2c_dw_set_fifo_size(struct dw_i2c_dev *dev) * Try to detect the FIFO depth if not set by interface driver, * the depth could be from 2 to 256 from HW spec. */ + ret = i2c_dw_acquire_lock(dev); + if (ret) + return ret; + ret = regmap_read(dev->map, DW_IC_COMP_PARAM_1, ¶m); + i2c_dw_release_lock(dev); if (ret) return ret; @@ -607,6 +612,11 @@ u32 i2c_dw_func(struct i2c_adapter *adap) void i2c_dw_disable(struct dw_i2c_dev *dev) { u32 dummy; + int ret; + + ret = i2c_dw_acquire_lock(dev); + if (ret) + return; /* Disable controller */ __i2c_dw_disable(dev); @@ -614,6 +624,8 @@ void i2c_dw_disable(struct dw_i2c_dev *dev) /* Disable all interrupts */ regmap_write(dev->map, DW_IC_INTR_MASK, 0); regmap_read(dev->map, DW_IC_CLR_INTR, &dummy); + + i2c_dw_release_lock(dev); } void i2c_dw_disable_int(struct dw_i2c_dev *dev) diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c index 9177463c2cbb..1a4b23556db3 100644 --- a/drivers/i2c/busses/i2c-designware-master.c +++ b/drivers/i2c/busses/i2c-designware-master.c @@ -905,7 +905,13 @@ int i2c_dw_probe_master(struct dw_i2c_dev *dev) irq_flags = IRQF_SHARED | IRQF_COND_SUSPEND; } + ret = i2c_dw_acquire_lock(dev); + if (ret) + return ret; + i2c_dw_disable_int(dev); + i2c_dw_release_lock(dev); + ret = devm_request_irq(dev->dev, dev->irq, i2c_dw_isr, irq_flags, dev_name(dev->dev), dev); if (ret) { |