diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-sprd.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-sprd.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index 25fcc3c1e32b..2fdad63a23a1 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -86,6 +86,7 @@ struct sprd_i2c { u32 count; int irq; int err; + bool is_suspended; }; static void sprd_i2c_set_count(struct sprd_i2c *i2c_dev, u32 count) @@ -283,6 +284,9 @@ static int sprd_i2c_master_xfer(struct i2c_adapter *i2c_adap, struct sprd_i2c *i2c_dev = i2c_adap->algo_data; int im, ret; + if (i2c_dev->is_suspended) + return -EBUSY; + ret = pm_runtime_get_sync(i2c_dev->dev); if (ret < 0) return ret; @@ -586,11 +590,23 @@ static int sprd_i2c_remove(struct platform_device *pdev) static int __maybe_unused sprd_i2c_suspend_noirq(struct device *pdev) { + struct sprd_i2c *i2c_dev = dev_get_drvdata(pdev); + + i2c_lock_adapter(&i2c_dev->adap); + i2c_dev->is_suspended = true; + i2c_unlock_adapter(&i2c_dev->adap); + return pm_runtime_force_suspend(pdev); } static int __maybe_unused sprd_i2c_resume_noirq(struct device *pdev) { + struct sprd_i2c *i2c_dev = dev_get_drvdata(pdev); + + i2c_lock_adapter(&i2c_dev->adap); + i2c_dev->is_suspended = false; + i2c_unlock_adapter(&i2c_dev->adap); + return pm_runtime_force_resume(pdev); } |