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hwrng: imx-rngc - simplify the power management definitions

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Use the SIMPLE_DEV_PM_OPS() macro instead of populating a struct
dev_pm_ops directly. The suspend and resume functions will now be used
for both hibernation and suspend to ram.

If power management is disabled, SIMPLE_DEV_PM_OPS() evaluates to
nothing, The two functions won't be used and won't be included in the
kernel. Mark them as __maybe_unused to clarify that this is intended
behaviour.

With these modifications in place, we don't need the #ifdefs for power
management any more.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Martin Kaiser 2018-01-11 22:06:39 +01:00 committed by Herbert Xu
parent e1a018e607
commit cd0bb67f21
1 changed files with 3 additions and 10 deletions
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13
drivers/char/hw_random/imx-rngc.c
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@ -282,8 +282,7 @@ static int __exit imx_rngc_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int imx_rngc_suspend(struct device *dev)
static int __maybe_unused imx_rngc_suspend(struct device *dev)
{
struct imx_rngc *rngc = dev_get_drvdata(dev);
@ -292,7 +291,7 @@ static int imx_rngc_suspend(struct device *dev)
return 0;
}
static int imx_rngc_resume(struct device *dev)
static int __maybe_unused imx_rngc_resume(struct device *dev)
{
struct imx_rngc *rngc = dev_get_drvdata(dev);
@ -301,11 +300,7 @@ static int imx_rngc_resume(struct device *dev)
return 0;
}
static const struct dev_pm_ops imx_rngc_pm_ops = {
.suspend = imx_rngc_suspend,
.resume = imx_rngc_resume,
};
#endif
SIMPLE_DEV_PM_OPS(imx_rngc_pm_ops, imx_rngc_suspend, imx_rngc_resume);
static const struct of_device_id imx_rngc_dt_ids[] = {
{ .compatible = "fsl,imx25-rngb", .data = NULL, },
@ -316,9 +311,7 @@ MODULE_DEVICE_TABLE(of, imx_rngc_dt_ids);
static struct platform_driver imx_rngc_driver = {
.driver = {
.name = "imx_rngc",
#ifdef CONFIG_PM
.pm = &imx_rngc_pm_ops,
#endif
.of_match_table = imx_rngc_dt_ids,
},
.remove = __exit_p(imx_rngc_remove),