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rockchip: board: Add board_rng_seed() for all Rockchip devices

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Allow all rockchip devices to use the hardware RNG to seed Linux
RNG.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Chris Morgan 2024-01-02 09:46:52 -06:00 • committed by Kever Yang
parent 4913ce37c4
commit d2048bafae
2 changed files with 32 additions and 29 deletions
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32
arch/arm/mach-rockchip/board.c
View file

@ -320,3 +320,35 @@ __weak int misc_init_r(void)
return ret;
}
#endif
#if IS_ENABLED(CONFIG_BOARD_RNG_SEED) && IS_ENABLED(CONFIG_RNG_ROCKCHIP)
#include <rng.h>
/* Use hardware rng to seed Linux random. */
__weak int board_rng_seed(struct abuf *buf)
{
struct udevice *dev;
size_t len = 0x8;
u64 *data;
data = malloc(len);
if (!data) {
printf("Out of memory\n");
return -ENOMEM;
}
if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
printf("No RNG device\n");
return -ENODEV;
}
if (dm_rng_read(dev, data, len)) {
printf("Reading RNG failed\n");
return -EIO;
}
abuf_init_set(buf, data, len);
return 0;
}
#endif

29
board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
View file

@ -16,7 +16,6 @@
#include <mmc.h>
#include <panel.h>
#include <pwm.h>
#include <rng.h>
#include <stdlib.h>
#include <video_bridge.h>
@ -133,34 +132,6 @@ void spl_board_init(void)
(GPIO0_BASE + GPIO_SWPORT_DR_H));
}
/* Use hardware rng to seed Linux random. */
int board_rng_seed(struct abuf *buf)
{
struct udevice *dev;
size_t len = 0x8;
u64 *data;
data = malloc(len);
if (!data) {
printf("Out of memory\n");
return -ENOMEM;
}
if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
printf("No RNG device\n");
return -ENODEV;
}
if (dm_rng_read(dev, data, len)) {
printf("Reading RNG failed\n");
return -EIO;
}
abuf_init_set(buf, data, len);
return 0;
}
/*
* Buzz the buzzer so the user knows something is going on. Make it
* optional in case PWM is disabled.