[PATCH 5/5] tests/functional/aarch64: add raspi4b RNG200/thermal test

Add test_arm_raspi4_rng_thermal, exercising the raspi4b RNG200 and
thermal sensor devices added in this series: boot, confirm the
RNG200 driver probes it ("hwrng registered" in the kernel log),
reach a shell, and confirm the thermal zone reports the expected
fixed reading and /dev/hwrng actually yields data rather than just
existing.

Verified locally against this series with the exact kernel/initrd
assets this file already pins.

Signed-off-by: Marcelo Manzo <[email protected]>
---
 tests/functional/aarch64/test_raspi4.py | 32 +++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/tests/functional/aarch64/test_raspi4.py b/tests/functional/aarch64/test_raspi4.py
index 0e254a20..69748ce5 100755
--- a/tests/functional/aarch64/test_raspi4.py
+++ b/tests/functional/aarch64/test_raspi4.py
@@ -122,5 +122,37 @@ def test_arm_raspi4_genet(self):
         exec_command_and_wait_for_pattern(self, 'halt', 'reboot: System halted')
 
 
+    def test_arm_raspi4_rng_thermal(self):
+        kernel_path = self.archive_extract(self.ASSET_KERNEL_20190215,
+                                           member='boot/kernel8.img')
+        dtb_path = self.archive_extract(self.ASSET_KERNEL_20190215,
+                                        member='boot/bcm2711-rpi-4-b.dtb')
+        initrd_path = self.uncompress(self.ASSET_INITRD)
+
+        self.set_machine('raspi4b')
+        self.vm.set_console()
+        kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
+                               'earlycon=pl011,mmio32,0xfe201000 ' +
+                               'console=ttyAMA0,115200 ' +
+                               'panic=-1 noreboot ' +
+                               'dwc_otg.fiq_fsm_enable=0')
+        self.vm.add_args('-kernel', kernel_path,
+                         '-dtb', dtb_path,
+                         '-initrd', initrd_path,
+                         '-append', kernel_command_line,
+                         '-no-reboot')
+        self.vm.launch()
+        self.wait_for_console_pattern(
+            'iproc-rng200 fe104000.rng: hwrng registered')
+        self.wait_for_console_pattern('Boot successful.')
+
+        exec_command_and_wait_for_pattern(
+            self, 'cat /sys/devices/virtual/thermal/thermal_zone0/temp',
+            '25310')
+        exec_command_and_wait_for_pattern(self, 'head -c 8 /dev/hwrng | xxd',
+                                                '00000000:')
+        exec_command_and_wait_for_pattern(self, 'halt', 'reboot: System halted')
+
+
 if __name__ == '__main__':
     LinuxKernelTest.main()
-- 
2.47.1