diff options
| author | Jens Taprogge <jens.taprogge@taprogge.org> | 2012-09-11 11:35:01 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-11 19:16:35 (GMT) |
| commit | 07766ab0256c0870746dae2362625e64e8968fc7 (patch) | |
| tree | 59c53be2fa476a49d40282ce1533f8581450c3ae /drivers/staging/ipack | |
| parent | 939c37a3c9da8bc23edbbfc01674c1c472a3ad1d (diff) | |
| download | linux-07766ab0256c0870746dae2362625e64e8968fc7.tar.xz | |
Staging: ipack: Switch to 8MHz operation before reading ID.
Reading the ID space at 8 MHz is always supported. Most carriers will
boot up in 8MHz mode. Still, play it safe and ensure we are operating at
8Mhz.
Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/ipack')
| -rw-r--r-- | drivers/staging/ipack/ipack.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/staging/ipack/ipack.c b/drivers/staging/ipack/ipack.c index 6895426..e2f819ca 100644 --- a/drivers/staging/ipack/ipack.c +++ b/drivers/staging/ipack/ipack.c @@ -377,6 +377,9 @@ struct ipack_device *ipack_device_register(struct ipack_bus_device *bus, dev_set_name(&dev->dev, "ipack-dev.%u.%u", dev->bus_nr, dev->slot); + if (bus->ops->set_clockrate(dev, 8)) + dev_warn(&dev->dev, "failed to switch to 8 MHz operation for reading of device ID.\n"); + ret = ipack_device_read_id(dev); if (ret < 0) { dev_err(&dev->dev, "error reading device id section.\n"); @@ -385,9 +388,11 @@ struct ipack_device *ipack_device_register(struct ipack_bus_device *bus, } /* if the device supports 32 MHz operation, use it. */ - ret = bus->ops->set_clockrate(dev, dev->speed_32mhz ? 32 : 8); - if (ret < 0) - dev_err(&dev->dev, "failed to perform set_clock_rate operation.\n"); + if (dev->speed_32mhz) { + ret = bus->ops->set_clockrate(dev, 32); + if (ret < 0) + dev_err(&dev->dev, "failed to switch to 32 MHz operation.\n"); + } ret = device_register(&dev->dev); if (ret < 0) { |