Add RK3576 support.

ok dlg@

sys/dev/fdt/rkclock.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: rkclock.c,v 1.98 2026/05/04 08:00:27 kettenis Exp $	*/
+/*	$OpenBSD: rkclock.c,v 1.99 2026/05/05 10:23:27 kettenis Exp $	*/
 /*
  * Copyright (c) 2017, 2018 Mark Kettenis <kettenis@openbsd.org>
  *
@@ -4494,6 +4494,10 @@ rk3576_reset(void *cookie, uint32_t *cells, int on)
 		reg = RK3576_PHPTOPCRU_SOFTRST_CON(1);
 		bit = 8;
 		break;
+	case RK3576_SRST_H_TRNG_NS:
+		reg = RK3576_SECURECRU_SOFTRST_CON(0);
+		bit = 4;
+		break;
 	case RK3576_SRST_P_OTPC_NS:
 		reg = RK3576_SECURECRU_SOFTRST_CON(0);
 		bit = 8;

sys/dev/fdt/rkclock_clocks.h

@@ -494,6 +494,7 @@
 #define RK3576_SRST_P_PCIE2_COMBOPHY1	419
 #define RK3576_SRST_PCIE0_PIPE_PHY	421
 #define RK3576_SRST_PCIE1_PIPE_PHY	422
+#define RK3576_SRST_H_TRNG_NS		424
 #define RK3576_SRST_P_OTPC_NS		425
 #define RK3576_SRST_OTPC_NS		426
 

sys/dev/fdt/rkrng.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: rkrng.c,v 1.8 2025/10/09 19:25:37 kettenis Exp $	*/
+/*	$OpenBSD: rkrng.c,v 1.9 2026/05/05 10:23:27 kettenis Exp $	*/
 /*
  * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
  *
@@ -56,6 +56,14 @@
 #define TRNG_SAMPLE_CNT			0x0404
 #define TRNG_DOUT_BASE			0x0410
 
+/* RK3576 TRNG */
+#define RKRNG_CFG			0x0000
+#define RKRNG_CTRL			0x0010
+#define  RKRNG_CTRL_REQ_TRNG		((1U << 4) << 16 | (1U << 4))
+#define RKRNG_STATE			0x0014
+#define  RKRNG_STATE_TRNG_RDY		(1U << 4)
+#define RKRNG_TRNG_DATA0		0x0050
+
 /* RK3588 TRNG */
 #define TRNG_V1_CTRL			0x0000
 #define  TRNG_V1_CTRL_NOP		0x00
@@ -135,13 +143,23 @@ static const struct rkrng_v rkrnv_v2 = {
 	.dout		= TRNG_DOUT_BASE,
 };
 
+void	rkrng_rk3576_start(struct rkrng_softc *);
+int	rkrng_rk3576_starting(struct rkrng_softc *);
+void	rkrng_rk3576_stop(struct rkrng_softc *);
+
+static const struct rkrng_v rkrnv_rk3576 = {
+	.start		= rkrng_rk3576_start,
+	.starting	= rkrng_rk3576_starting,
+	.stop		= rkrng_rk3576_stop,
+	.dout		= RKRNG_TRNG_DATA0,
+};
+
 int	rkrng_rk3588_init(struct rkrng_softc *);
 void	rkrng_rk3588_start(struct rkrng_softc *);
 int	rkrng_rk3588_starting(struct rkrng_softc *);
 void	rkrng_rk3588_stop(struct rkrng_softc *);
 
 static const struct rkrng_v rkrnv_rk3588 = {
-	.version	= 3,
 	.init		= rkrng_rk3588_init,
 	.start		= rkrng_rk3588_start,
 	.starting	= rkrng_rk3588_starting,
@@ -160,6 +178,7 @@ rkrng_match(struct device *parent, void *match, void *aux)
 	    OF_is_compatible(faa->fa_node, "rockchip,rk3399-crypto") ||
 	    OF_is_compatible(faa->fa_node, "rockchip,cryptov2-rng") ||
 	    OF_is_compatible(faa->fa_node, "rockchip,rk3568-rng") ||
+	    OF_is_compatible(faa->fa_node, "rockchip,rk3576-rng") ||
 	    OF_is_compatible(faa->fa_node, "rockchip,rk3588-rng");
 }
 
@@ -177,6 +196,8 @@ rkrng_attach(struct device *parent, struct device *self, void *aux)
 	else if (OF_is_compatible(faa->fa_node, "rockchip,cryptov2-rng") ||
 		 OF_is_compatible(faa->fa_node, "rockchip,rk3568-rng"))
 		sc->sc_v = &rkrnv_v2;
+	else if (OF_is_compatible(faa->fa_node, "rockchip,rk3576-rng"))
+		sc->sc_v = &rkrnv_rk3576;
 	else if (OF_is_compatible(faa->fa_node, "rockchip,rk3588-rng"))
 		sc->sc_v = &rkrnv_rk3588;
 	else {
@@ -196,7 +217,13 @@ rkrng_attach(struct device *parent, struct device *self, void *aux)
 		return;
 	}
 
-	printf(": ver %u\n", sc->sc_v->version);
+	if (sc->sc_v->version > 0)
+		printf(": ver %u", sc->sc_v->version);
+	printf("\n");
+
+	reset_assert_all(faa->fa_node);
+	delay(2);
+	reset_deassert_all(faa->fa_node);
 
 	clock_set_assigned(faa->fa_node);
 	clock_enable_all(faa->fa_node);
@@ -256,6 +283,27 @@ rkrng_v2_stop(struct rkrng_softc *sc)
 	HWRITE4(sc, TRNG_CTL, (ctl_m << 16) | 0);
 }
 
+void
+rkrng_rk3576_start(struct rkrng_softc *sc)
+{
+	HWRITE4(sc, RKRNG_CTRL, RKRNG_CTRL_REQ_TRNG);
+}
+
+int
+rkrng_rk3576_starting(struct rkrng_softc *sc)
+{
+	if ((HREAD4(sc, RKRNG_STATE) & RKRNG_STATE_TRNG_RDY) == 0)
+		return 1;
+
+	HWRITE4(sc, RKRNG_STATE, RKRNG_STATE_TRNG_RDY);
+	return 0;
+}
+
+void
+rkrng_rk3576_stop(struct rkrng_softc *sc)
+{
+}
+
 int
 rkrng_rk3588_init(struct rkrng_softc *sc)
 {