samples: drivers: remove entropy sample

This sample doesn't do anything interesting and we have
tests/drivers/entropy to can show how to call the API.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

samples/drivers/entropy/CMakeLists.txt

@@ -1,8 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-cmake_minimum_required(VERSION 3.13.1)
-find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
-project(entropy)
-
-FILE(GLOB app_sources src/*.c)
-target_sources(app PRIVATE ${app_sources})

samples/drivers/entropy/README.rst

@@ -1,33 +0,0 @@
-.. _entropy_sample:
-
-Entropy
-#######
-
-Overview
-********
-Sample for the entropy gathering driver
-
-Building and Running
-********************
-
-This project writes an infinite series of random numbers to the
-console, 9 per second.
-
-It can be built and executed on frdm_k64f as follows:
-
-.. zephyr-app-commands::
-   :zephyr-app: samples/drivers/entropy
-   :host-os: unix
-   :board: frdm_k64f
-   :goals: run
-   :compact:
-
-Sample Output
-=============
-
-.. code-block:: console
-
-   Entropy Example! arm
-   entropy device is 0x2000008c, name is ENTROPY_0
-     0xd7  0x42  0xb0  0x7b  0x56  0x3b  0xc3  0x43  0x8a  0xa3
-     0xfa  0xec  0xd8  0xc3  0x36  0xf8  0x7b  0x82  0x2b  0x39

samples/drivers/entropy/prj.conf

@@ -1,2 +0,0 @@
-CONFIG_ENTROPY_GENERATOR=y
-CONFIG_STDOUT_CONSOLE=y

samples/drivers/entropy/sample.yaml

@@ -1,14 +0,0 @@
-sample:
-  name: Sample for the entropy gathering driver
-tests:
-  sample.drivers.entropy:
-    tags: crypto entropy
-    filter: CONFIG_ENTROPY_HAS_DRIVER
-    harness: console
-    harness_config:
-      type: multi_line
-      ordered: true
-      regex:
-        - "Entropy Example! (.*)"
-        - "entropy device is (.*), name is (.*)"
-        - "(\\s*0x([0-9a-f]){2}){9}"

samples/drivers/entropy/src/main.c

@@ -1,55 +0,0 @@
-/*
- * Copyright (c) 2016 ARM Ltd.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <zephyr.h>
-#include <drivers/entropy.h>
-#include <stdio.h>
-
-void main(void)
-{
-	const struct device *dev;
-
-	printf("Entropy Example! %s\n", CONFIG_ARCH);
-
-	dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_entropy));
-	if (!device_is_ready(dev)) {
-		printf("error: no entropy device\n");
-		return;
-	}
-
-	printf("entropy device is %p, name is %s\n",
-	       dev, dev->name);
-
-	while (1) {
-#define BUFFER_LENGTH 10
-		uint8_t buffer[BUFFER_LENGTH] = {0};
-		int r;
-
-		/* The BUFFER_LENGTH-1 is used so the driver will not
-		 * write the last byte of the buffer. If that last
-		 * byte is not 0 on return it means the driver wrote
-		 * outside the passed buffer, and that should never
-		 * happen.
-		 */
-		r = entropy_get_entropy(dev, buffer, BUFFER_LENGTH-1);
-		if (r) {
-			printf("entropy_get_entropy failed: %d\n", r);
-			break;
-		}
-
-		if (buffer[BUFFER_LENGTH-1] != 0U) {
-			printf("entropy_get_entropy buffer overflow\n");
-		}
-
-		for (int i = 0; i < BUFFER_LENGTH-1; i++) {
-			printf("  0x%02x", buffer[i]);
-		}
-
-		printf("\n");
-
-		k_sleep(K_MSEC(1000));
-	}
-}