From: Jens Taprogge <jens.taprogge@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@xxxxxxxxxx>
---
drivers/staging/ipack/ipack.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/ipack/ipack.c b/drivers/staging/ipack/ipack.c
index 6895426..e2f819c 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) {
--
1.7.10.4
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