diff options
| author | Sean Wang <[email protected]> | 2018-07-09 23:56:58 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2018-07-15 12:23:53 +0200 |
| commit | 76d8ca245c721c12f79779679699b229e361f4ac (patch) | |
| tree | 3bd60e45570a97bfce04edf946edff7a6c0cfc64 | |
| parent | 819abf294a381499a177a660805bf0b8a329700b (diff) | |
serdev: add dev_pm_domain_attach|detach()
In order to open up the required power gate before any operation can be
effectively performed over the serial bus between CPU and serdev, it's
clearly essential to add common attach functions for PM domains to serdev
at the probe phase.
Similarly, the relevant dettach function for the PM domains should be
properly and reversely added at the remove phase.
Signed-off-by: Sean Wang <[email protected]>
Reviewed-by: Ulf Hansson <[email protected]>
Reviewed-by: Johan Hovold <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Ulf Hansson <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
| -rw-r--r-- | drivers/tty/serdev/core.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index bd47c46ec993..9db93f500b4e 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/pm_domain.h> #include <linux/pm_runtime.h> #include <linux/serdev.h> #include <linux/slab.h> @@ -350,8 +351,17 @@ EXPORT_SYMBOL_GPL(serdev_device_set_tiocm); static int serdev_drv_probe(struct device *dev) { const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver); + int ret; - return sdrv->probe(to_serdev_device(dev)); + ret = dev_pm_domain_attach(dev, true); + if (ret) + return ret; + + ret = sdrv->probe(to_serdev_device(dev)); + if (ret) + dev_pm_domain_detach(dev, true); + + return ret; } static int serdev_drv_remove(struct device *dev) @@ -359,6 +369,9 @@ static int serdev_drv_remove(struct device *dev) const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver); if (sdrv->remove) sdrv->remove(to_serdev_device(dev)); + + dev_pm_domain_detach(dev, true); + return 0; } |