ARM: OMAP2xxx: hwmod/CM: add RNG integration data

Add integration data for the hardware random number generator IP block
on some OMAP SoCs.  This appears to be present on at least OMAP2xxx
and OMAP3xxx SoCs, although it is not so easy to tell.  It may also be
present on other OMAP2+ SoCs.

Signed-off-by: Paul Walmsley <paul@pwsan.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c b/arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c
index 3c009069f2f..32c778bf8f0 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c
@@ -792,3 +792,47 @@ struct omap_hwmod omap2xxx_gpmc_hwmod = {
 		},
 	},
 };
+
+/* RNG */
+
+static struct omap_hwmod_class_sysconfig omap2_rng_sysc = {
+	.rev_offs	= 0x3c,
+	.sysc_offs	= 0x40,
+	.syss_offs	= 0x44,
+	.sysc_flags	= (SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE |
+			   SYSS_HAS_RESET_STATUS),
+	.sysc_fields	= &omap_hwmod_sysc_type1,
+};
+
+static struct omap_hwmod_class omap2_rng_hwmod_class = {
+	.name		= "rng",
+	.sysc		= &omap2_rng_sysc,
+};
+
+static struct omap_hwmod_irq_info omap2_rng_mpu_irqs[] = {
+	{ .irq = 52 },
+	{ .irq = -1 }
+};
+
+struct omap_hwmod omap2xxx_rng_hwmod = {
+	.name		= "rng",
+	.mpu_irqs	= omap2_rng_mpu_irqs,
+	.main_clk	= "l4_ck",
+	.prcm		= {
+		.omap2 = {
+			.module_offs = CORE_MOD,
+			.prcm_reg_id = 4,
+			.module_bit = OMAP24XX_EN_RNG_SHIFT,
+			.idlest_reg_id = 4,
+			.idlest_idle_bit = OMAP24XX_ST_RNG_SHIFT,
+		},
+	},
+	/*
+	 * XXX The first read from the SYSSTATUS register of the RNG
+	 * after the SYSCONFIG SOFTRESET bit is set triggers an
+	 * imprecise external abort.  It's unclear why this happens.
+	 * Until this is analyzed, skip the IP block reset.
+	 */
+	.flags		= HWMOD_INIT_NO_RESET,
+	.class		= &omap2_rng_hwmod_class,
+};