Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756003AbbGFU1t (ORCPT ); Mon, 6 Jul 2015 16:27:49 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:33656 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753484AbbGFU0o (ORCPT ); Mon, 6 Jul 2015 16:26:44 -0400 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= To: Russell King , Laura Abbott , Grant Likely , Rob Herring , Will Deacon , Ivaylo Dimitrov , Sebastian Reichel , Pavel Machek , Tony Lindgren , =?UTF-8?q?Andreas=20F=C3=A4rber?= Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, =?UTF-8?q?Pali=20Roh=C3=A1r?= Subject: [PATCH 1/5] arm: devtree: Set system_rev from DT "/revision" Date: Mon, 6 Jul 2015 22:26:09 +0200 Message-Id: <1436214373-12969-2-git-send-email-pali.rohar@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1436214373-12969-1-git-send-email-pali.rohar@gmail.com> References: <1436214373-12969-1-git-send-email-pali.rohar@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2399 Lines: 77 With this patch "/revision" DT entry is used to set global system_rev variable. DT "/revision" is expected to be u32 numeric value. TODO: add documentation Signed-off-by: Pali Rohár --- arch/arm/kernel/devtree.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c index 11c54de..7d82749 100644 --- a/arch/arm/kernel/devtree.c +++ b/arch/arm/kernel/devtree.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -26,6 +27,7 @@ #include #include #include +#include #ifdef CONFIG_SMP @@ -204,6 +206,8 @@ static const void * __init arch_get_next_mach(const char *const **match) const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys) { const struct machine_desc *mdesc, *mdesc_best = NULL; + unsigned long dt_root; + const u32 *rev; #ifdef CONFIG_ARCH_MULTIPLATFORM DT_MACHINE_START(GENERIC_DT, "Generic DT based system") @@ -215,17 +219,16 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys) if (!dt_phys || !early_init_dt_verify(phys_to_virt(dt_phys))) return NULL; + dt_root = of_get_flat_dt_root(); mdesc = of_flat_dt_match_machine(mdesc_best, arch_get_next_mach); if (!mdesc) { const char *prop; int size; - unsigned long dt_root; early_print("\nError: unrecognized/unsupported " "device tree compatible list:\n[ "); - dt_root = of_get_flat_dt_root(); prop = of_get_flat_dt_prop(dt_root, "compatible", &size); while (size > 0) { early_print("'%s' ", prop); @@ -246,5 +249,10 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys) /* Change machine number to match the mdesc we're using */ __machine_arch_type = mdesc->nr; + /* Set system revision from DT */ + rev = of_get_flat_dt_prop(dt_root, "revision", NULL); + if (rev) + system_rev = fdt32_to_cpu(*rev); + return mdesc; } -- 1.7.9.5 -- 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/