From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756510Ab3GVOiG (ORCPT ); Mon, 22 Jul 2013 10:38:06 -0400 Received: from mail-qe0-f53.google.com ([209.85.128.53]:62596 "EHLO mail-qe0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756180Ab3GVOiC (ORCPT ); Mon, 22 Jul 2013 10:38:02 -0400 Date: Mon, 22 Jul 2013 10:37:59 -0400 (EDT) From: Nicolas Pitre To: Sudeep KarkadaNagesha cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, Russell King , Shawn Guo , Gregory Clement , Greg Kroah-Hartman , Viresh Kumar , "Rafael J. Wysocki" , Grant Likely , Rob Herring , Lorenzo Pieralisi , Olof Johansson , Arnd Bergmann Subject: Re: [PATCH v3 06/16] drivers/bus: arm-cci: avoid parsing DT for cpu device nodes In-Reply-To: <1374492747-13879-7-git-send-email-Sudeep.KarkadaNagesha@arm.com> Message-ID: References: <1374069984-20567-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> <1374492747-13879-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> <1374492747-13879-7-git-send-email-Sudeep.KarkadaNagesha@arm.com> User-Agent: Alpine 2.03 (LFD 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 22 Jul 2013, Sudeep KarkadaNagesha wrote: > From: Sudeep KarkadaNagesha > > Since the CPU device nodes can be retrieved using arch_of_get_cpu_node, > we can use it to avoid parsing the cpus node searching the cpu nodes and > mapping to logical index. > > This patch removes parsing DT for cpu nodes by using of_get_cpu_node. > > Cc: Lorenzo Pieralisi > Signed-off-by: Sudeep KarkadaNagesha Acked-by: Nicolas Pitre > --- > drivers/bus/arm-cci.c | 28 +++++++--------------------- > 1 file changed, 7 insertions(+), 21 deletions(-) > > diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c > index 7332889..7dd891c 100644 > --- a/drivers/bus/arm-cci.c > +++ b/drivers/bus/arm-cci.c > @@ -122,17 +122,8 @@ EXPORT_SYMBOL_GPL(cci_ace_get_port); > > static void __init cci_ace_init_ports(void) > { > - int port, ac, cpu; > - u64 hwid; > - const u32 *cell; > - struct device_node *cpun, *cpus; > - > - cpus = of_find_node_by_path("/cpus"); > - if (WARN(!cpus, "Missing cpus node, bailing out\n")) > - return; > - > - if (WARN_ON(of_property_read_u32(cpus, "#address-cells", &ac))) > - ac = of_n_addr_cells(cpus); > + int port, cpu; > + struct device_node *cpun; > > /* > * Port index look-up speeds up the function disabling ports by CPU, > @@ -141,18 +132,13 @@ static void __init cci_ace_init_ports(void) > * The stashed index array is initialized for all possible CPUs > * at probe time. > */ > - for_each_child_of_node(cpus, cpun) { > - if (of_node_cmp(cpun->type, "cpu")) > - continue; > - cell = of_get_property(cpun, "reg", NULL); > - if (WARN(!cell, "%s: missing reg property\n", cpun->full_name)) > - continue; > - > - hwid = of_read_number(cell, ac); > - cpu = get_logical_index(hwid & MPIDR_HWID_BITMASK); > + for_each_possible_cpu(cpu) { > + /* too early to use cpu->of_node */ > + cpun = of_get_cpu_node(cpu); > > - if (cpu < 0 || !cpu_possible(cpu)) > + if (WARN(!cpun, "Missing cpu device node\n")) > continue; > + > port = __cci_ace_get_port(cpun, ACE_PORT); > if (port < 0) > continue; > -- > 1.8.1.2 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >