mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
i2c: rcar: disable PM in multi-master mode
In multi master mode, the IP core needs to be always active for arbitration reasons. Get the config from DT and set up PM depending on the config. Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
parent
42c0783b89
commit
7ee24eb508
1 changed files with 14 additions and 3 deletions
|
@ -96,6 +96,9 @@
|
|||
#define ID_DONE (1 << 2)
|
||||
#define ID_ARBLOST (1 << 3)
|
||||
#define ID_NACK (1 << 4)
|
||||
/* persistent flags */
|
||||
#define ID_P_PM_BLOCKED (1 << 31)
|
||||
#define ID_P_MASK ID_P_PM_BLOCKED
|
||||
|
||||
enum rcar_i2c_type {
|
||||
I2C_RCAR_GEN1,
|
||||
|
@ -277,7 +280,7 @@ static void rcar_i2c_next_msg(struct rcar_i2c_priv *priv)
|
|||
{
|
||||
priv->msg++;
|
||||
priv->msgs_left--;
|
||||
priv->flags = 0;
|
||||
priv->flags &= ID_P_MASK;
|
||||
rcar_i2c_prepare_msg(priv);
|
||||
}
|
||||
|
||||
|
@ -495,7 +498,7 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
|
|||
/* init first message */
|
||||
priv->msg = msgs;
|
||||
priv->msgs_left = num;
|
||||
priv->flags = ID_FIRST_MSG;
|
||||
priv->flags = (priv->flags & ID_P_MASK) | ID_FIRST_MSG;
|
||||
rcar_i2c_prepare_msg(priv);
|
||||
|
||||
time_left = wait_event_timeout(priv->wait, priv->flags & ID_DONE,
|
||||
|
@ -630,7 +633,13 @@ static int rcar_i2c_probe(struct platform_device *pdev)
|
|||
goto out_pm_put;
|
||||
|
||||
rcar_i2c_init(priv);
|
||||
pm_runtime_put(dev);
|
||||
|
||||
/* Don't suspend when multi-master to keep arbitration working */
|
||||
if (of_property_read_bool(dev->of_node, "multi-master"))
|
||||
priv->flags |= ID_P_PM_BLOCKED;
|
||||
else
|
||||
pm_runtime_put(dev);
|
||||
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
ret = devm_request_irq(dev, irq, rcar_i2c_irq, 0, dev_name(dev), priv);
|
||||
|
@ -664,6 +673,8 @@ static int rcar_i2c_remove(struct platform_device *pdev)
|
|||
struct device *dev = &pdev->dev;
|
||||
|
||||
i2c_del_adapter(&priv->adap);
|
||||
if (priv->flags & ID_P_PM_BLOCKED)
|
||||
pm_runtime_put(dev);
|
||||
pm_runtime_disable(dev);
|
||||
|
||||
return 0;
|
||||
|
|
Loading…
Reference in a new issue