From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp6-v.fe.bosch.de ([139.15.237.11]:10018 "EHLO smtp6-v.fe.bosch.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754005AbcEYI6f (ORCPT ); Wed, 25 May 2016 04:58:35 -0400 Received: from vsmta12.fe.internet.bosch.com (unknown [10.4.98.52]) by imta24.fe.bosch.de (Postfix) with ESMTP id 9EDB7D80219 for ; Wed, 25 May 2016 10:58:33 +0200 (CEST) Received: from FE-HUB1001.de.bosch.com (vsgw23.fe.internet.bosch.com [10.4.98.23]) by vsmta12.fe.internet.bosch.com (Postfix) with ESMTP id 4F4111B803D9 for ; Wed, 25 May 2016 10:58:33 +0200 (CEST) From: Dirk Behme To: Geert Uytterhoeven , Simon Horman , , Koji Matsuoka CC: Dirk Behme Subject: [PATCH 1/4] ARM: Renesas: R-Car3: Add product register support Date: Wed, 25 May 2016 10:58:25 +0200 Message-ID: <1464166708-18320-2-git-send-email-dirk.behme@de.bosch.com> In-Reply-To: <1464166708-18320-1-git-send-email-dirk.behme@de.bosch.com> References: <1464166708-18320-1-git-send-email-dirk.behme@de.bosch.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-renesas-soc-owner@vger.kernel.org List-ID: The product register of the Renesas R-Car3 isn't part of any SoC module, but "just" a register at address 0xFFF00044. It provides some configuration information about the SoC itself, like the number of the CA57, CA53 and CR7 cores, the product description (R-Car H3, R-Car M3-W etc) and the sample revision. This information is needed by some drivers to enable or disable specific features which are present or not in the SoC. Signed-off-by: Dirk Behme --- drivers/soc/renesas/Makefile | 4 ++-- drivers/soc/renesas/rcar3-prr.c | 49 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+), 2 deletions(-) create mode 100644 drivers/soc/renesas/rcar3-prr.c diff --git a/drivers/soc/renesas/Makefile b/drivers/soc/renesas/Makefile index cd85cd5..d39990a 100644 --- a/drivers/soc/renesas/Makefile +++ b/drivers/soc/renesas/Makefile @@ -4,5 +4,5 @@ obj-$(CONFIG_ARCH_R8A7791) += rcar-sysc.o r8a7791-sysc.o # R-Car M2-N is identical to R-Car M2-W w.r.t. power domains. obj-$(CONFIG_ARCH_R8A7793) += rcar-sysc.o r8a7791-sysc.o obj-$(CONFIG_ARCH_R8A7794) += rcar-sysc.o r8a7794-sysc.o -obj-$(CONFIG_ARCH_R8A7795) += rcar-sysc.o r8a7795-sysc.o -obj-$(CONFIG_ARCH_R8A7796) += rcar-sysc.o r8a7796-sysc.o +obj-$(CONFIG_ARCH_R8A7795) += rcar-sysc.o r8a7795-sysc.o rcar3-prr.o +obj-$(CONFIG_ARCH_R8A7796) += rcar-sysc.o r8a7796-sysc.o rcar3-prr.o diff --git a/drivers/soc/renesas/rcar3-prr.c b/drivers/soc/renesas/rcar3-prr.c new file mode 100644 index 0000000..8fda1c2 --- /dev/null +++ b/drivers/soc/renesas/rcar3-prr.c @@ -0,0 +1,49 @@ +/* + * R-Car3 Product Register (PRR) support + * + * Copyright (C) 2016 Robert Bosch Car Multimedia GmbH + * Dirk Behme + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include + +unsigned int __rcar3_prr; +EXPORT_SYMBOL(__rcar3_prr); + +static const struct of_device_id rcar3_prr_ids[] __initconst = { + { .compatible = "renesas,rcar-gen3-prr" }, + {} +}; + +static int __init rcar3_read_prr(void) +{ + struct device_node *np; + void __iomem *prr; + + np = of_find_matching_node(NULL, rcar3_prr_ids); + if (!np) { + pr_err("can't find renesas,rcar-gen3-prr device node"); + return -ENOENT; + } + + prr = of_iomap(np, 0); + if (!prr) { + pr_err("failed to map product register"); + of_node_put(np); + return -ENOMEM; + } + + __rcar3_prr = ioread32(prr); + + iounmap(prr); + of_node_put(np); + + return 0; +} +early_initcall(rcar3_read_prr); -- 2.8.0