From patchwork Mon Jun 16 11:23:03 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: R Sricharan X-Patchwork-Id: 4358321 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AA6469F26E for ; Mon, 16 Jun 2014 11:31:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EE7F220260 for ; Mon, 16 Jun 2014 11:31:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BC152020E for ; Mon, 16 Jun 2014 11:31:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753717AbaFPLZ5 (ORCPT ); Mon, 16 Jun 2014 07:25:57 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:43230 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752613AbaFPLZy (ORCPT ); Mon, 16 Jun 2014 07:25:54 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id s5GBPNbq018635; Mon, 16 Jun 2014 06:25:23 -0500 Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s5GBPNYQ025870; Mon, 16 Jun 2014 06:25:23 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.174.1; Mon, 16 Jun 2014 06:25:23 -0500 Received: from uda0393807.india.ti.com. (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s5GBOx40008965; Mon, 16 Jun 2014 06:25:18 -0500 From: Sricharan R To: , , , CC: , , , , , , , , Subject: [PATCH V3 03/16] irqchip: crossbar: introduce ti,irqs-skip to skip Date: Mon, 16 Jun 2014 16:53:03 +0530 Message-ID: <1402917796-31574-4-git-send-email-r.sricharan@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1402917796-31574-1-git-send-email-r.sricharan@ti.com> References: <1402917796-31574-1-git-send-email-r.sricharan@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Nishanth Menon When, in the system due to varied reasons, interrupts might be unusable due to hardware behavior, but register maps do exist, then those interrupts should be skipped while mapping irq to crossbars. Signed-off-by: Nishanth Menon Signed-off-by: Sricharan R --- [V3] introduced ti,irqs-skip dt property to list the irqs to be skipped. .../devicetree/bindings/arm/omap/crossbar.txt | 4 ++++ drivers/irqchip/irq-crossbar.c | 20 ++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/omap/crossbar.txt b/Documentation/devicetree/bindings/arm/omap/crossbar.txt index fb88585..cfcbd52 100644 --- a/Documentation/devicetree/bindings/arm/omap/crossbar.txt +++ b/Documentation/devicetree/bindings/arm/omap/crossbar.txt @@ -17,6 +17,10 @@ Required properties: so crossbar bar driver should not consider them as free lines. +Optional properties: +- ti,irqs-skip: This is similar to "ti,irqs-reserved", but are irq mappings + which are not supposed to be used for errata or other reasons(virtualization). + Examples: crossbar_mpu: @4a020000 { compatible = "ti,irq-crossbar"; diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c index 51d4b87..27049de 100644 --- a/drivers/irqchip/irq-crossbar.c +++ b/drivers/irqchip/irq-crossbar.c @@ -18,6 +18,7 @@ #define IRQ_FREE -1 #define IRQ_RESERVED -2 +#define IRQ_SKIP -3 #define GIC_IRQ_START 32 /* @@ -160,6 +161,25 @@ static int __init crossbar_of_init(struct device_node *node) } } + /* Skip the ones marked as skip */ + irqsr = of_get_property(node, "ti,irqs-skip", &size); + if (irqsr) { + size /= sizeof(__be32); + + for (i = 0; i < size; i++) { + of_property_read_u32_index(node, + "ti,irqs-skip", + i, &entry); + if (entry > max) { + pr_err("Invalid skip entry\n"); + ret = -EINVAL; + goto err3; + } + cb->irq_map[entry] = IRQ_SKIP; + } + } + + cb->register_offsets = kzalloc(max * sizeof(int), GFP_KERNEL); if (!cb->register_offsets) goto err3;