[PATCH 1/1] doc: qemu-arm peripherials

[Heinrich Schuchardt]

* add description how to add RNG device
* for a disk specify format=raw to avoid a warning
* fix a typo

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 doc/board/emulation/qemu-arm.rst | 9 +++++++--
 drivers/tpm/tpm2_tis_mmio.c      | 5 ++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/doc/board/emulation/qemu-arm.rst b/doc/board/emulation/qemu-arm.rst
index 584ef0a7e1..7c24e29410 100644
--- a/doc/board/emulation/qemu-arm.rst
+++ b/doc/board/emulation/qemu-arm.rst
@@ -65,7 +65,8 @@ can be enabled with the following command line parameters:
 
 - To add a Serial ATA disk via an Intel ICH9 AHCI controller, pass e.g.::
 
-    -drive if=none,file=disk.img,id=mydisk -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0
+    -drive if=none,file=disk.img,format=raw,id=mydisk \
+    -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0
 
 - To add an Intel E1000 network adapter, pass e.g.::
 
@@ -75,10 +76,14 @@ can be enabled with the following command line parameters:
 
     -device usb-ehci,id=ehci
 
-- To add a NVMe disk, pass e.g.::
+- To add an NVMe disk, pass e.g.::
 
     -drive if=none,file=disk.img,id=mydisk -device nvme,drive=mydisk,serial=foo
 
+- To add a random number generator, pass e.g.::
+
+    -device virtio-rng-pci
+
 These have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well.
 
 Enabling TPMv2 support
diff --git a/drivers/tpm/tpm2_tis_mmio.c b/drivers/tpm/tpm2_tis_mmio.c
index 9cedff2225..f04aab2e6e 100644
--- a/drivers/tpm/tpm2_tis_mmio.c
+++ b/drivers/tpm/tpm2_tis_mmio.c
@@ -118,10 +118,13 @@ iounmap:
 static int tpm_tis_remove(struct udevice *dev)
 {
 	struct tpm_tis_chip_data *drv_data = (void *)dev_get_driver_data(dev);
+	int ret;
+
+	ret =  tpm_tis_cleanup(dev);
 
 	iounmap(drv_data->iobase);
 
-	return tpm_tis_cleanup(dev);
+	return ret;
 }
 
 static const struct tpm_ops tpm_tis_ops = {
-- 
2.32.0