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i2c: rcar: make sure irq is not threaded on Gen2 and earlier

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[ Upstream commit 24c6d4bc56 ]

Ensure this irq runs as fast as possible.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wolfram Sang 2020-12-23 18:21:53 +01:00 committed by Greg Kroah-Hartman
parent f41d2bfef5
commit 11e2b2b6f6
1 changed files with 5 additions and 1 deletions
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6
drivers/i2c/busses/i2c-rcar.c
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@ -928,6 +928,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
struct rcar_i2c_priv *priv; struct rcar_i2c_priv *priv;
struct i2c_adapter *adap; struct i2c_adapter *adap;
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
unsigned long irqflags = 0;
int ret; int ret;
/* Otherwise logic will break because some bytes must always use PIO */ /* Otherwise logic will break because some bytes must always use PIO */
@ -976,6 +977,9 @@ static int rcar_i2c_probe(struct platform_device *pdev)
rcar_i2c_write(priv, ICSAR, 0); /* Gen2: must be 0 if not using slave */ rcar_i2c_write(priv, ICSAR, 0); /* Gen2: must be 0 if not using slave */
if (priv->devtype < I2C_RCAR_GEN3)
irqflags |= IRQF_NO_THREAD;
if (priv->devtype == I2C_RCAR_GEN3) { if (priv->devtype == I2C_RCAR_GEN3) {
priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (!IS_ERR(priv->rstc)) { if (!IS_ERR(priv->rstc)) {
@ -995,7 +999,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
priv->flags |= ID_P_HOST_NOTIFY; priv->flags |= ID_P_HOST_NOTIFY;
priv->irq = platform_get_irq(pdev, 0); priv->irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, 0, dev_name(dev), priv); ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, irqflags, dev_name(dev), priv);
if (ret < 0) { if (ret < 0) {
dev_err(dev, "cannot get irq %d\n", priv->irq); dev_err(dev, "cannot get irq %d\n", priv->irq);
goto out_pm_disable; goto out_pm_disable;