rng: Introduce SPL_DM_RNG

Add SPL variant of DM_RNG so that the DM_RNG can be disabled in SPL
if necessary. This may be necessary due to e.g. size constraints of
the SPL.

Signed-off-by: Marek Vasut <marex@denx.de>

9 files changed, 16 insertions, 11 deletions

diff --git a/boot/pxe_utils.c b/boot/pxe_utils.c
index 9620562675..5c1c962ff4 100644
--- a/boot/pxe_utils.c
+++ b/boot/pxe_utils.c
@@ -21,9 +21,7 @@
 #include <errno.h>
 #include <linux/list.h>
 
-#ifdef CONFIG_DM_RNG
 #include <rng.h>
-#endif
 
 #include <splash.h>
 #include <asm/io.h>
@@ -323,7 +321,7 @@ static int label_localboot(struct pxe_label *label)
 
 static void label_boot_kaslrseed(void)
 {
-#ifdef CONFIG_DM_RNG
+#if CONFIG_IS_ENABLED(DM_RNG)
 	ulong fdt_addr;
 	struct fdt_header *working_fdt;
 	size_t n = 0x8;
diff --git a/boot/vbe_request.c b/boot/vbe_request.c
index 917251afa1..0293ac6c86 100644
--- a/boot/vbe_request.c
+++ b/boot/vbe_request.c
@@ -36,7 +36,7 @@ static int handle_random_req(ofnode node, int default_size,
 	u32 size;
 	int ret;
 
-	if (!IS_ENABLED(CONFIG_DM_RNG))
+	if (!CONFIG_IS_ENABLED(DM_RNG))
 		return -ENOTSUPP;
 
 	if (ofnode_read_u32(node, "vbe,size", &size)) {
diff --git a/drivers/Makefile b/drivers/Makefile
index bf73b7718c..9195dafd37 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -126,7 +126,7 @@ obj-$(CONFIG_W1_EEPROM) += w1-eeprom/
 obj-$(CONFIG_MACH_PIC32) += ddr/microchip/
 obj-$(CONFIG_FUZZ) += fuzz/
 obj-$(CONFIG_DM_HWSPINLOCK) += hwspinlock/
-obj-$(CONFIG_DM_RNG) += rng/
+obj-$(CONFIG_$(SPL_TPL_)DM_RNG) += rng/
 endif
 
 obj-y += soc/
diff --git a/drivers/crypto/fsl/jr.c b/drivers/crypto/fsl/jr.c
index 203f162521..8ae5c434bd 100644
--- a/drivers/crypto/fsl/jr.c
+++ b/drivers/crypto/fsl/jr.c
@@ -787,7 +787,7 @@ init:
 	}
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 	if (ofnode_valid(scu_node)) {
-		if (IS_ENABLED(CONFIG_DM_RNG)) {
+		if (CONFIG_IS_ENABLED(DM_RNG)) {
 			ret = device_bind_driver(NULL, "caam-rng", "caam-rng", NULL);
 			if (ret)
 				printf("Couldn't bind rng driver (%d)\n", ret);
@@ -810,7 +810,7 @@ init:
 			return -1;
 		}
 
-		if (IS_ENABLED(CONFIG_DM_RNG)) {
+		if (CONFIG_IS_ENABLED(DM_RNG)) {
 			ret = device_bind_driver(NULL, "caam-rng", "caam-rng",
 						 NULL);
 			if (ret)
diff --git a/drivers/rng/Kconfig b/drivers/rng/Kconfig
index cd72852a47..5758ae192a 100644
--- a/drivers/rng/Kconfig
+++ b/drivers/rng/Kconfig
@@ -6,6 +6,13 @@ config DM_RNG
 	  This interface is used to initialise the rng device and to
 	  read the random seed from the device.
 
+config SPL_DM_RNG
+	bool "Driver support for Random Number Generator devices in SPL"
+	depends on SPL_DM
+	help
+	  This option is an SPL-variant of the DM_RNG option.
+	  See the help of DM_RNG for details.
+
 if DM_RNG
 
 config RNG_MESON
diff --git a/drivers/rng/Makefile b/drivers/rng/Makefile
index ecae1a3da3..c1f1c616e0 100644
--- a/drivers/rng/Makefile
+++ b/drivers/rng/Makefile
@@ -3,7 +3,7 @@
 # Copyright (c) 2019, Linaro Limited
 #
 
-obj-$(CONFIG_DM_RNG) += rng-uclass.o
+obj-$(CONFIG_$(SPL_TPL_)DM_RNG) += rng-uclass.o
 obj-$(CONFIG_RNG_MESON) += meson-rng.o
 obj-$(CONFIG_RNG_SANDBOX) += sandbox_rng.o
 obj-$(CONFIG_RNG_MSM) += msm_rng.o
diff --git a/lib/uuid.c b/lib/uuid.c
index 2d7d99535e..dfa2320ba2 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -378,7 +378,7 @@ void gen_rand_uuid(unsigned char *uuid_bin)
 	struct udevice *devp;
 	u32 randv = 0;
 
-	if (IS_ENABLED(CONFIG_DM_RNG)) {
+	if (CONFIG_IS_ENABLED(DM_RNG)) {
 		ret = uclass_get_device(UCLASS_RNG, 0, &devp);
 		if (!ret) {
 			ret = dm_rng_read(devp, &randv, sizeof(randv));
diff --git a/net/net_rand.h b/net/net_rand.h
index d3c5559adf..686e85f2b5 100644
--- a/net/net_rand.h
+++ b/net/net_rand.h
@@ -42,7 +42,7 @@ static inline void srand_mac(void)
 	struct udevice *devp;
 	u32 randv = 0;
 
-	if (IS_ENABLED(CONFIG_DM_RNG)) {
+	if (CONFIG_IS_ENABLED(DM_RNG)) {
 		ret = uclass_get_device(UCLASS_RNG, 0, &devp);
 		if (ret) {
 			ret = dm_rng_read(devp, &randv, sizeof(randv));
diff --git a/test/dm/Makefile b/test/dm/Makefile
index a3ce7b3889..c12589d487 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -102,7 +102,7 @@ obj-$(CONFIG_DM_RESET) += reset.o
 obj-$(CONFIG_SYSRESET) += sysreset.o
 obj-$(CONFIG_DM_REGULATOR) += regulator.o
 obj-$(CONFIG_CMD_RKMTD) += rkmtd.o
-obj-$(CONFIG_DM_RNG) += rng.o
+obj-$(CONFIG_$(SPL_TPL_)DM_RNG) += rng.o
 obj-$(CONFIG_DM_RTC) += rtc.o
 obj-$(CONFIG_SCMI_FIRMWARE) += scmi.o
 obj-$(CONFIG_SCSI) += scsi.o