subsys: Add random subsystem

Some "random" drivers are not drivers at all: they just implement the
function `sys_rand32_get()`.  Move those to a random subsystem in
preparation for a reorganization.

Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>

arch/arc/soc/em11d/soc.h

@@ -31,7 +31,7 @@
 #ifndef _ASMLANGUAGE
 
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #define ARCV2_TIMER0_INT_LVL			IRQ_TIMER0
 #define ARCV2_TIMER0_INT_PRI			0

arch/arc/soc/em7d/soc.h

@@ -40,7 +40,7 @@
 #ifndef _ASMLANGUAGE
 
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #define ARCV2_TIMER0_INT_LVL			IRQ_TIMER0
 #define ARCV2_TIMER0_INT_PRI			0

arch/arc/soc/em9d/soc.h

@@ -31,7 +31,7 @@
 #ifndef _ASMLANGUAGE
 
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #define ARCV2_TIMER0_INT_LVL			IRQ_TIMER0
 #define ARCV2_TIMER0_INT_PRI			0

arch/arc/soc/quark_se_c1000_ss/soc.h

@@ -105,7 +105,7 @@
 #ifndef _ASMLANGUAGE
 
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <quark_se/shared_mem.h>
 
 #define INT_ENABLE_ARC					~(0x00000001 << 8)

arch/arm/soc/nordic_nrf5/nrf51/soc.h

@@ -17,7 +17,7 @@
 #include <nrf.h>
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #endif /* !_ASMLANGUAGE */
 

arch/arm/soc/nordic_nrf5/nrf52/soc.h

@@ -17,7 +17,7 @@
 #include <nrf.h>
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #endif /* !_ASMLANGUAGE */
 

arch/arm/soc/nxp_kinetis/k6x/soc.h

@@ -125,7 +125,7 @@ extern "C" {
 #include <fsl_common.h>
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 /* For IMG_MANAGER */
 #if defined(CONFIG_SOC_FLASH_MCUX)

arch/arm/soc/nxp_kinetis/kl2x/soc.h

@@ -54,7 +54,7 @@ extern "C" {
 
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #endif /* !_ASMLANGUAGE */
 

arch/arm/soc/nxp_kinetis/kwx/soc.h

@@ -127,7 +127,7 @@ extern "C" {
 #include <fsl_common.h>
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #endif /* !_ASMLANGUAGE */
 

arch/arm/soc/st_stm32/stm32f0/soc.h

@@ -26,7 +26,7 @@
 
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #include <stm32f0xx.h>
 

arch/arm/soc/st_stm32/stm32f1/soc.h

@@ -26,7 +26,7 @@
 
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #include <stm32f1xx.h>
 

arch/arm/soc/st_stm32/stm32f3/soc.h

@@ -27,7 +27,7 @@
 
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #include <stm32f3xx.h>
 

arch/arm/soc/st_stm32/stm32f4/soc.h

@@ -26,7 +26,7 @@
 
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 #include <stm32f4xx.h>
 

arch/arm/soc/ti_lm3s6965/soc.h

@@ -73,7 +73,7 @@ extern "C" {
 
 #include <device.h>
 #include <misc/util.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 /* uart configuration settings */
 #if defined(CONFIG_UART_STELLARIS)

arch/x86/soc/atom/soc.h

@@ -19,7 +19,7 @@
 
 #ifndef _ASMLANGUAGE
 #include <device.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #endif
 
 #define INT_VEC_IRQ0 0x20 /* vector number for IRQ0 */

arch/x86/soc/ia32/soc.h

@@ -19,7 +19,7 @@
 
 #ifndef _ASMLANGUAGE
 #include <device.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #endif
 
 /*

arch/x86/soc/intel_quark/quark_x1000/soc.h

@@ -19,7 +19,7 @@
 
 #ifndef _ASMLANGUAGE
 #include <device.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #endif
 
 #ifdef CONFIG_IOAPIC

drivers/ieee802154/ieee802154_cc2520.c

@@ -23,7 +23,7 @@
 
 #include <misc/byteorder.h>
 #include <string.h>
-#include <rand32.h>
+#include <random/rand32.h>
 
 #include <gpio.h>
 

drivers/ieee802154/ieee802154_kw41z.c

@@ -20,7 +20,7 @@
 #include <net/net_if.h>
 #include <net/net_pkt.h>
 #include <misc/byteorder.h>
-#include <rand32.h>
+#include <random/rand32.h>
 
 #include "fsl_xcvr.h"
 

drivers/ieee802154/ieee802154_mcr20a.c

@@ -23,7 +23,7 @@
 
 #include <misc/byteorder.h>
 #include <string.h>
-#include <rand32.h>
+#include <random/rand32.h>
 
 #include <gpio.h>
 

drivers/ieee802154/ieee802154_nrf5.c

@@ -23,7 +23,7 @@
 
 #include <misc/byteorder.h>
 #include <string.h>
-#include <rand32.h>
+#include <random/rand32.h>
 
 #include <net/ieee802154_radio.h>
 #include <drivers/clock_control/nrf5_clock_control.h>

drivers/random/Kconfig

@@ -17,7 +17,6 @@ if RANDOM_GENERATOR
 
 source "drivers/random/Kconfig.mcux"
 source "drivers/random/Kconfig.stm32"
-
 source "drivers/random/Kconfig.esp32"
 
 config RANDOM_HAS_DRIVER
@@ -48,35 +47,4 @@ config SYS_LOG_RANDOM_LEVEL
 	  - 3 INFO: write SYS_LOG_INF in addition to previous levels
 	  - 4 DEBUG: write SYS_LOG_DBG in addition to previous levels
 
-config TEST_RANDOM_GENERATOR
-	bool
-	prompt "Non-random number generator"
-	depends on RANDOM_GENERATOR && ! RANDOM_HAS_DRIVER
-	default n
-	help
-	  This option signifies that the kernel's random number APIs are
-	  permitted to return values that are not truly random.
-	  This capability is provided for testing purposes, when a truly random
-	  number generator is not available. The non-random number generator
-	  should not be used in a production environment.
-
-config X86_TSC_RANDOM_GENERATOR
-	bool
-	prompt "x86 timestamp counter based number generator"
-	depends on TEST_RANDOM_GENERATOR && X86
-	default y
-	help
-	  This options enables number generator based on timestamp counter
-	  of x86 boards, obtained with rdtsc instruction.
-
-config TIMER_RANDOM_GENERATOR
-	bool
-	prompt "System timer clock based number generator"
-	depends on TEST_RANDOM_GENERATOR && !X86_TSC_RANDOM_GENERATOR
-	default y
-	help
-	  This options enables number generator based on system timer
-	  clock. This number generator is not random and used for
-	  testing only.
-
 endif

drivers/random/Makefile

@@ -1,7 +1,5 @@
 obj-$(CONFIG_RANDOM_MCUX_RNGA) += random_mcux_rnga.o
 obj-$(CONFIG_RANDOM_MCUX_TRNG) += random_mcux_trng.o
-obj-$(CONFIG_TIMER_RANDOM_GENERATOR) = rand32_timer.o
-obj-$(CONFIG_X86_TSC_RANDOM_GENERATOR) += rand32_timestamp.o
 obj-$(CONFIG_RANDOM_STM32_RNG) += random_stm32_rng.o
 obj-$(CONFIG_RANDOM_ESP32_RNG) += random_esp32.o
 

drivers/random/random_mcux_rnga.c

@@ -6,7 +6,7 @@
 
 #include <device.h>
 #include <random.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <init.h>
 
 #include "fsl_rnga.h"

drivers/random/random_mcux_trng.c

@@ -6,7 +6,7 @@
 
 #include <device.h>
 #include <random.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <init.h>
 
 #include "fsl_trng.h"

drivers/random/random_stm32_rng.c

@@ -7,7 +7,7 @@
 #include <kernel.h>
 #include <device.h>
 #include <random.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <init.h>
 #include <misc/__assert.h>
 #include <misc/util.h>

include/kernel.h

@@ -26,7 +26,7 @@
 #include <misc/slist.h>
 #include <misc/util.h>
 #include <kernel_version.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <kernel_arch_thread.h>
 #include <syscall.h>
 

kernel/init.c

@@ -16,7 +16,7 @@
 #include <kernel.h>
 #include <misc/printk.h>
 #include <misc/stack.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <linker/sections.h>
 #include <toolchain.h>
 #include <kernel_structs.h>

samples/net/irc_bot/src/irc-bot.c

@@ -10,7 +10,7 @@
 #include <logging/sys_log.h>
 
 #include <board.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <errno.h>
 #include <gpio.h>
 #include <net/net_app.h>

subsys/Kconfig

@@ -26,3 +26,5 @@ source "subsys/shell/Kconfig"
 source "subsys/usb/Kconfig"
 
 source "subsys/dfu/Kconfig"
+
+source "subsys/random/Kconfig"

subsys/Makefile

@@ -6,6 +6,7 @@ obj-$(CONFIG_CONSOLE_SHELL) += shell/
 obj-$(CONFIG_CONSOLE_PULL) += console/
 obj-$(CONFIG_DISK_ACCESS) += disk/
 obj-$(CONFIG_CPLUSPLUS) += cpp/
+obj-$(CONFIG_MCUBOOT_IMG_MANAGER) += dfu/
 obj-y += logging/
 obj-y += debug/
-obj-$(CONFIG_MCUBOOT_IMG_MANAGER) += dfu/
+obj-y += random/

subsys/random/Kconfig

@@ -0,0 +1,35 @@
+# Kconfig - random configuration options
+#
+# Copyright (c) 2017 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config TEST_RANDOM_GENERATOR
+	bool
+	prompt "Non-random number generator"
+	depends on RANDOM_GENERATOR && ! RANDOM_HAS_DRIVER
+	default n
+	help
+	  This option signifies that the kernel's random number APIs are
+	  permitted to return values that are not truly random.
+	  This capability is provided for testing purposes, when a truly random
+	  number generator is not available. The non-random number generator
+	  should not be used in a production environment.
+
+config X86_TSC_RANDOM_GENERATOR
+	bool
+	prompt "x86 timestamp counter based number generator"
+	depends on TEST_RANDOM_GENERATOR && X86
+	help
+	  This options enables number generator based on timestamp counter
+	  of x86 boards, obtained with rdtsc instruction.
+
+config TIMER_RANDOM_GENERATOR
+	bool
+	prompt "System timer clock based number generator"
+	depends on TEST_RANDOM_GENERATOR
+	help
+	  This options enables number generator based on system timer
+	  clock. This number generator is not random and used for
+	  testing only.

subsys/random/Makefile

@@ -0,0 +1,2 @@
+obj-$(CONFIG_TIMER_RANDOM_GENERATOR) = rand32_timer.o
+obj-$(CONFIG_X86_TSC_RANDOM_GENERATOR) += rand32_timestamp.o

subsys/random/rand32_timer.c

@@ -14,7 +14,7 @@
  * provide a random number generator.
  */
 
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 #include <drivers/system_timer.h>
 #include <kernel.h>
 #include <atomic.h>

subsys/random/rand32_timestamp.c

@@ -16,7 +16,7 @@
 
 #include <kernel.h>
 #include <arch/cpu.h>
-#include <drivers/rand32.h>
+#include <random/rand32.h>
 
 /**
  *