From patchwork Mon Aug 16 14:36:41 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Nelson X-Patchwork-Id: 119712 X-Patchwork-Delegate: tony@atomide.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o7GEbbGu021835 for ; Mon, 16 Aug 2010 14:37:56 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754498Ab0HPOhQ (ORCPT ); Mon, 16 Aug 2010 10:37:16 -0400 Received: from mail-yx0-f174.google.com ([209.85.213.174]:60619 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754250Ab0HPOhO (ORCPT ); Mon, 16 Aug 2010 10:37:14 -0400 Received: by yxg6 with SMTP id 6so1902776yxg.19 for ; Mon, 16 Aug 2010 07:37:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:cc:subject:date :message-id:x-mailer; bh=Xae7hO5EuHy8t0qcMyrRaM4ion1gYKnPzntd4V4APq0=; b=xqWaTuUIHIurzFWsEEcG11u/CHL2ij7DGXZD2ZBf1eLY2XSYEIRnFFfyyJiayLtse6 RBzA3TUr2fmh/Pah8xlwLNGzZTk2GyfqlLgidZ1hIWGXqLTF+NwRykkrTjt+1KKLTXNg /Hm2LQ/or3uLXHsdzUKhcYFpSMSajjVP264es= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer; b=vYYlKmHGDsgWo31339/ZHbzoF75VwBS8NTeCOrNjLDqGF3RXpyn4VT64mnQtdn8p8o G4EkZDmBUYAjC93Uqwv3inY/KySvNDqLq6RWWjrcmdm9I+YA5gYoNXp7k8bmwyqrbFZA gwIHJiiq/KEt7gyl1V3xsy7rBeZts3gvtJyow= Received: by 10.100.215.13 with SMTP id n13mr5855008ang.229.1281969433872; Mon, 16 Aug 2010 07:37:13 -0700 (PDT) Received: from localhost.localdomain (thief-statics-245.mncable.net [64.77.213.245]) by mx.google.com with ESMTPS id 14sm10489967ant.21.2010.08.16.07.37.11 (version=TLSv1/SSLv3 cipher=RC4-MD5); Mon, 16 Aug 2010 07:37:12 -0700 (PDT) From: Robert Nelson To: tony@atomide.com Cc: linux-omap@vger.kernel.org, Robert Nelson , Jarkko Nikula Subject: [PATCH v4 1/3] ARM: OMAP: Beagle: revision detection Date: Mon, 16 Aug 2010 09:36:41 -0500 Message-Id: <1281969403-28312-1-git-send-email-robertcnelson@gmail.com> X-Mailer: git-send-email 1.7.0.4 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Mon, 16 Aug 2010 14:37:56 +0000 (UTC) diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c index 87969c7..01a288f 100644 --- a/arch/arm/mach-omap2/board-omap3beagle.c +++ b/arch/arm/mach-omap2/board-omap3beagle.c @@ -50,6 +50,84 @@ #define NAND_BLOCK_SIZE SZ_128K +/* + * OMAP3 Beagle revision + * Run time detection of Beagle revision is done by reading GPIO. + * GPIO ID - + * AXBX = GPIO173, GPIO172, GPIO171: 1 1 1 + * C1_3 = GPIO173, GPIO172, GPIO171: 1 1 0 + * C4 = GPIO173, GPIO172, GPIO171: 1 0 1 + * XM = GPIO173, GPIO172, GPIO171: 0 0 0 + */ +enum { + OMAP3BEAGLE_BOARD_AXBX = 0, + OMAP3BEAGLE_BOARD_C1_3, + OMAP3BEAGLE_BOARD_C4, + OMAP3BEAGLE_BOARD_XM, +}; + +static u8 omap3_beagle_version; + +u8 get_omap3_beagle_rev(void) +{ + return omap3_beagle_version; +} + +static void __init omap3_beagle_get_revision(void) +{ + int ret; + u16 beagle_rev = 0; + + omap_mux_init_gpio(171, OMAP_PIN_INPUT_PULLUP); + omap_mux_init_gpio(172, OMAP_PIN_INPUT_PULLUP); + omap_mux_init_gpio(173, OMAP_PIN_INPUT_PULLUP); + + ret = gpio_request(171, "rev_id_0"); + if (ret < 0) + goto fail; + + ret = gpio_request(172, "rev_id_1"); + if (ret < 0) + goto fail; + + ret = gpio_request(173, "rev_id_2"); + if (ret < 0) + goto fail; + + gpio_direction_input(171); + gpio_direction_input(172); + gpio_direction_input(173); + + beagle_rev = gpio_get_value(171) | (gpio_get_value(172) << 1) + | (gpio_get_value(173) << 2); + + switch (beagle_rev) { + case 7: + printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n"); + omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX; + break; + case 6: + printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n"); + omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3; + break; + case 5: + printk(KERN_INFO "OMAP3 Beagle Rev: C4\n"); + omap3_beagle_version = OMAP3BEAGLE_BOARD_C4; + break; + case 0: + printk(KERN_INFO "OMAP3 Beagle Rev: xM\n"); + omap3_beagle_version = OMAP3BEAGLE_BOARD_XM; + break; + default: + printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev); + omap3_beagle_version = OMAP3BEAGLE_BOARD_XM; + } + + return; +fail: + printk(KERN_ERR "Unable to get revision detection GPIO pins\n"); +} + static struct mtd_partition omap3beagle_nand_partitions[] = { /* All the partition sizes are listed in terms of NAND block size */ { @@ -464,6 +542,7 @@ static struct omap_musb_board_data musb_board_data = { static void __init omap3_beagle_init(void) { omap3_mux_init(board_mux, OMAP_PACKAGE_CBB); + omap3_beagle_get_revision(); omap3_beagle_i2c_init(); platform_add_devices(omap3_beagle_devices, ARRAY_SIZE(omap3_beagle_devices));