From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753478Ab3JRLY3 (ORCPT ); Fri, 18 Oct 2013 07:24:29 -0400 Received: from jacques.telenet-ops.be ([195.130.132.50]:46144 "EHLO jacques.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753424Ab3JRLY0 (ORCPT ); Fri, 18 Oct 2013 07:24:26 -0400 From: Geert Uytterhoeven To: linux-m68k@vger.kernel.org Cc: "Theodore Ts'o" , linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v2 2/2] m68k/amiga: Provide mach_random_get_entropy() Date: Fri, 18 Oct 2013 13:24:13 +0200 Message-Id: <1382095453-24086-2-git-send-email-geert@linux-m68k.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1382095453-24086-1-git-send-email-geert@linux-m68k.org> References: <1382095453-24086-1-git-send-email-geert@linux-m68k.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the beam position registers, which provide at least 17 bits of data changing at 1.79 MHz. Signed-off-by: Geert Uytterhoeven --- v2: - Use beam position registers (which provide a faster rate but less bits) instead of 24-bit Time-Of-Day clock in CIA B running at HSYNC. arch/m68k/amiga/config.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c index f78361bff623..0b46d32a345f 100644 --- a/arch/m68k/amiga/config.c +++ b/arch/m68k/amiga/config.c @@ -354,6 +354,14 @@ static void __init amiga_identify(void) #undef AMIGAHW_ANNOUNCE } + +static unsigned long amiga_random_get_entropy(void) +{ + /* VPOSR/VHPOSR provide at least 17 bits of data changing at 1.79 MHz */ + return *(unsigned long *)&amiga_custom.vposr; +} + + /* * Setup the Amiga configuration info */ @@ -391,6 +399,8 @@ void __init config_amiga(void) mach_heartbeat = amiga_heartbeat; #endif + mach_random_get_entropy = amiga_random_get_entropy; + /* Fill in the clock value (based on the 700 kHz E-Clock) */ amiga_colorclock = 5*amiga_eclock; /* 3.5 MHz */ -- 1.7.9.5