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hwrng: iproc-rng200 - Implement suspend and resume calls
Chips such as BCM7278 support system wide suspend/resume which will
cause the HWRNG block to lose its state and reset to its power on reset
register values. We need to cleanup and re-initialize the HWRNG for it
to be functional coming out of a system suspend cycle.
Fixes: c3577f6100
("hwrng: iproc-rng200 - Add support for BCM7278")
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
parent
d88bdbd96d
commit
8e03dd62e5
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@ -181,6 +181,8 @@ static int iproc_rng200_probe(struct platform_device *pdev)
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return PTR_ERR(priv->base);
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return PTR_ERR(priv->base);
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}
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}
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dev_set_drvdata(dev, priv);
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priv->rng.name = "iproc-rng200";
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priv->rng.name = "iproc-rng200";
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priv->rng.read = iproc_rng200_read;
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priv->rng.read = iproc_rng200_read;
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priv->rng.init = iproc_rng200_init;
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priv->rng.init = iproc_rng200_init;
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@ -198,6 +200,28 @@ static int iproc_rng200_probe(struct platform_device *pdev)
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return 0;
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return 0;
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}
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}
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static int __maybe_unused iproc_rng200_suspend(struct device *dev)
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{
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struct iproc_rng200_dev *priv = dev_get_drvdata(dev);
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iproc_rng200_cleanup(&priv->rng);
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return 0;
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}
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static int __maybe_unused iproc_rng200_resume(struct device *dev)
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{
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struct iproc_rng200_dev *priv = dev_get_drvdata(dev);
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iproc_rng200_init(&priv->rng);
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return 0;
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}
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static const struct dev_pm_ops iproc_rng200_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(iproc_rng200_suspend, iproc_rng200_resume)
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};
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static const struct of_device_id iproc_rng200_of_match[] = {
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static const struct of_device_id iproc_rng200_of_match[] = {
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{ .compatible = "brcm,bcm2711-rng200", },
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{ .compatible = "brcm,bcm2711-rng200", },
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{ .compatible = "brcm,bcm7211-rng200", },
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{ .compatible = "brcm,bcm7211-rng200", },
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@ -211,6 +235,7 @@ static struct platform_driver iproc_rng200_driver = {
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.driver = {
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.driver = {
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.name = "iproc-rng200",
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.name = "iproc-rng200",
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.of_match_table = iproc_rng200_of_match,
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.of_match_table = iproc_rng200_of_match,
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.pm = &iproc_rng200_pm_ops,
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},
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},
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.probe = iproc_rng200_probe,
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.probe = iproc_rng200_probe,
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};
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};
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