From patchwork Wed Sep 11 11:14:07 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yadwinder Singh Brar X-Patchwork-Id: 2872241 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9DD34BF43F for ; Wed, 11 Sep 2013 11:16:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DBEF22026C for ; Wed, 11 Sep 2013 11:16:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8A90A20249 for ; Wed, 11 Sep 2013 11:16:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754837Ab3IKLQA (ORCPT ); Wed, 11 Sep 2013 07:16:00 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:26181 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754459Ab3IKLOz (ORCPT ); Wed, 11 Sep 2013 07:14:55 -0400 Received: from epcpsbgr2.samsung.com (u142.gpu120.samsung.co.kr [203.254.230.142]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MSY007YRKJV56N0@mailout4.samsung.com>; Wed, 11 Sep 2013 20:14:54 +0900 (KST) Received: from epcpsbgm1.samsung.com ( [172.20.52.125]) by epcpsbgr2.samsung.com (EPCPMTA) with SMTP id 66.F2.17682.DA050325; Wed, 11 Sep 2013 20:14:54 +0900 (KST) X-AuditID: cbfee68e-b7f756d000004512-7b-523050adbb8a Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id B3.62.09055.DA050325; Wed, 11 Sep 2013 20:14:53 +0900 (KST) Received: from localhost.localdomain ([107.108.83.81]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0MSY008QSKKGRQ20@mmp2.samsung.com>; Wed, 11 Sep 2013 20:14:53 +0900 (KST) From: Yadwinder Singh Brar To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, "Rafael J. Wysocki" , Viresh Kumar , MyungJoo Ham , Kukjin Kim , Thomas Abraham , Tomasz Figa , Yadwinder Singh Brar Subject: [RFC 3/4] power: asv: Add support for exynos5250 Date: Wed, 11 Sep 2013 16:44:07 +0530 Message-id: <1378898048-25205-4-git-send-email-yadi.brar@samsung.com> X-Mailer: git-send-email 1.7.0.4 In-reply-to: <1378898048-25205-1-git-send-email-yadi.brar@samsung.com> References: <1378898048-25205-1-git-send-email-yadi.brar@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpikeLIzCtJLcpLzFFi42JZI2JSq7suwCDIYEI7m0XvgqtsFpseX2O1 uLxrDpvFjPP7mCxuN65gs+hf2MtksX7GaxaLYzOWMFps/OphMWf6OyYHLo871/aweWxeUu/R t2UVo8ejxS2MHp83yQWwRnHZpKTmZJalFunbJXBlTGh5yFqwwLLi0BK7BsaPel2MnBwSAiYS P9e/Y4WwxSQu3FvP1sXIxSEksJRRYvbfWSwwRa/P7WCESExnlHh5+jkrhNPGJLHywjKgDAcH m4CRxKtjdiANIgIKEpt7n4HVMAs8Z5L4umcuG0hCWMBSYuKVBWA2i4CqxKtba8A28Aq4Siz8 vQtqm4JE67JD7CAzOQXcJNZMsQcJCwGV3N58ihlkpoTAJnaJzvcnWSHmCEh8m3yIBaReQkBW YtMBZogxkhIHV9xgmcAovICRYRWjaGpBckFxUnqRkV5xYm5xaV66XnJ+7iZGYPif/vesbwfj zQPWhxiTgcZNZJYSTc4Hxk9eSbyhsZmRhamJqbGRuaUZacJK4rxqLdaBQgLpiSWp2ampBalF 8UWlOanFhxiZODilGhgn1uwLLHLm0Jl6+5ITt+nsj9d8T0YlB8wL/pEZLOwmof1Y7XdaiIeL q3O507IFPg7FB72UnvgU712zp/2PYkbjV0/ZQ4oW56aHBXY8WbD9Y8/MF3NsX9r+uZVwivVN jMLp7UFTBD//6Q2c8f6JjqfHX+Gq6gJt98T/W6oOJhZl/VZjPf7nfaUSS3FGoqEWc1FxIgAB hsKGlQIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrPIsWRmVeSWpSXmKPExsVy+t9jQd21AQZBBl17LC16F1xls9j0+Bqr xeVdc9gsZpzfx2Rxu3EFm0X/wl4mi/UzXrNYHJuxhNFi41cPiznT3zE5cHncubaHzWPzknqP vi2rGD0eLW5h9Pi8SS6ANaqB0SYjNTEltUghNS85PyUzL91WyTs43jne1MzAUNfQ0sJcSSEv MTfVVsnFJ0DXLTMH6CglhbLEnFKgUEBicbGSvh2mCaEhbroWMI0Rur4hQXA9RgZoIGENY8aE loesBQssKw4tsWtg/KjXxcjJISFgIvH63A5GCFtM4sK99WxdjFwcQgLTGSVenn7OCuG0MUms vLAMqIqDg03ASOLVMTuQBhEBBYnNvc/AapgFnjNJfN0zlw0kISxgKTHxygIwm0VAVeLVrTUs IDavgKvEwt+7WCC2KUi0LjvEDjKTU8BNYs0Ue5CwEFDJ7c2nmCcw8i5gZFjFKJpakFxQnJSe a6hXnJhbXJqXrpecn7uJERxdz6R2MK5ssDjEKMDBqMTDe0NOP0iINbGsuDL3EKMEB7OSCO8D U4MgId6UxMqq1KL8+KLSnNTiQ4zJQEdNZJYSTc4HRn5eSbyhsYm5qbGppYmFiZklacJK4rwH Wq0DhQTSE0tSs1NTC1KLYLYwcXBKNTCKKuyXEdordqbJ5PbseZfe5a5her4maoNtQqVFRjn3 160Sr2ZEb/wqZL89Izewuvm/8nwe+6imy1N5t666+lc87EbUk63/FbcqaSRN2B/7nOWb2IyP 4uE1jfLrHB+tKDm5n1dT3la7Mz+n7ESh/yRLOf9nm65EfOvNf3xX3nODyvdVau4PeK2UWIoz Eg21mIuKEwEKuak/8gIAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.7 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 This patch adds basic support (only for ARM ASV) for exynos5250 chips which have fused ASV group. Signed-off-by: Yadwinder Singh Brar --- drivers/power/asv/Makefile | 2 +- drivers/power/asv/exynos-asv.c | 9 +++ drivers/power/asv/exynos-asv.h | 1 + drivers/power/asv/exynos5250-asv.c | 141 ++++++++++++++++++++++++++++++++++++ 4 files changed, 152 insertions(+), 1 deletions(-) create mode 100644 drivers/power/asv/exynos5250-asv.c diff --git a/drivers/power/asv/Makefile b/drivers/power/asv/Makefile index 9a94868..a471c8e 100644 --- a/drivers/power/asv/Makefile +++ b/drivers/power/asv/Makefile @@ -1,2 +1,2 @@ obj-$(CONFIG_POWER_ASV) += asv.o -obj-$(CONFIG_POWER_EXYNOS_ASV) += exynos-asv.o +obj-$(CONFIG_POWER_EXYNOS_ASV) += exynos-asv.o exynos5250-asv.o diff --git a/drivers/power/asv/exynos-asv.c b/drivers/power/asv/exynos-asv.c index d3f43a4..7449b55 100644 --- a/drivers/power/asv/exynos-asv.c +++ b/drivers/power/asv/exynos-asv.c @@ -46,9 +46,18 @@ static int exynos_asv_probe(struct platform_device *pdev) exynos_asv_info->base = base; /* call SoC specific intialisation routine */ + if (of_machine_is_compatible("samsung,exynos5250")) { + ret = exynos5250_asv_init(exynos_asv_info); + if (ret) { + pr_err("%s: exynos5250_asv_init failed : %d\n", + __func__, ret); + goto err; + } + } register_asv_member(exynos_asv_info->asv_list, exynos_asv_info->nr_mem); +err: iounmap(base); err_map: of_node_put(chip_id); diff --git a/drivers/power/asv/exynos-asv.h b/drivers/power/asv/exynos-asv.h index 89a1ae8..a31becb 100644 --- a/drivers/power/asv/exynos-asv.h +++ b/drivers/power/asv/exynos-asv.h @@ -18,4 +18,5 @@ struct exynos_asv_common { void __iomem *base; }; +extern int exynos5250_asv_init(struct exynos_asv_common *exynos_info); #endif /* __EXYNOS_ASV_D_H */ diff --git a/drivers/power/asv/exynos5250-asv.c b/drivers/power/asv/exynos5250-asv.c new file mode 100644 index 0000000..293b3f1 --- /dev/null +++ b/drivers/power/asv/exynos5250-asv.c @@ -0,0 +1,141 @@ +/* exynos5250 - ASV(Adaptive Supply Voltage) + * + * Copyright (c) 2013 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include +#include +#include +#include +#include "exynos-asv.h" + +#define FUSED_SG_OFFSET 3 +#define ORIG_SG_OFFSET 17 +#define ORIG_SG_MASK 0xF +#define MOD_SG_OFFSET 21 +#define MOD_SG_MASK 0x7 + +#define ARM_LEVEL_NR 16 +#define ARM_GRP_NR 12 + +#define CHIP_ID_OFFSET 0x4 + +struct exynos5250_asv_info { + unsigned int package_id; + /* we may need more info as global data */ +}; + +static struct exynos5250_asv_info asv_group __initdata; + +static unsigned int asv_voltage[ARM_LEVEL_NR][ARM_GRP_NR + 1] __initdata = { + { 1700000, 1300000, 1275000, 1275000, 1262500, 1250000, 1225000, + 1212500, 1200000, 1187500, 1175000, 1150000, 1125000 }, /* L0 */ + { 1600000, 1250000, 1225000, 1225000, 1212500, 1200000, 1187500, + 1175000, 1162500, 1150000, 1137500, 1112500, 1100000 }, /* L1 */ + { 1500000, 1225000, 1187500, 1175000, 1162500, 1150000, 1137500, + 1125000, 1112500, 1100000, 1087500, 1075000, 1062500 }, /* L2 */ + { 1400000, 1200000, 1125000, 1125000, 1125000, 1112500, 1100000, + 1087500, 1075000, 1062500, 1050000, 1037500, 1025000 }, /* L3 */ + { 1300000, 1150000, 1100000, 1100000, 1100000, 1087500, 1075000, + 1062500, 1050000, 1037500, 1025000, 1012500, 1000000 }, /* L4 */ + { 1200000, 1125000, 1075000, 1075000, 1062500, 1050000, 1037500, + 1025000, 1012500, 1000000, 987500, 975000, 975000 }, /* L5 */ + { 1100000, 1100000, 1050000, 1050000, 1037500, 1025000, 1012500, + 1000000, 987500, 975000, 962500, 950000, 925000 }, /* L6 */ + { 1000000, 1075000, 1037500, 1037500, 1012500, 1000000, 987500, + 975000, 962500, 950000, 937500, 925000, 912500 }, /* L7 */ + { 900000, 1050000, 1025000, 1012500, 987500, 975000, 962500, + 950000, 937500, 925000, 912500, 912500, 900000 }, /* L8 */ + { 800000, 1025000, 1000000, 987500, 975000, 962500, 950000, + 937500, 925000, 912500, 900000, 900000, 900000 }, /* L9 */ + { 700000, 1012500, 975000, 962500, 950000, 937500, 925000, + 912500, 900000, 900000, 900000, 900000, 900000 }, /* L10 */ + { 600000, 1000000, 962500, 950000, 937500, 925000, 912500, + 900000, 900000, 900000, 900000, 900000, 900000 }, /* L11 */ + { 500000, 975000, 950000, 937500, 925000, 912500, 900000, + 900000, 900000, 900000, 900000, 900000, 887500 }, /* L12 */ + { 400000, 950000, 937500, 925000, 912500, 900000, 900000, + 900000, 900000, 900000, 900000, 887500, 887500 }, /* L13 */ + { 300000, 937500, 925000, 912500, 900000, 900000, 900000, + 900000, 900000, 900000, 887500, 887500, 875000 }, /* L14 */ + { 200000, 925000, 912500, 900000, 900000, 900000, 900000, + 900000, 900000, 887500, 887500, 875000, 875000 }, /* L15 */ +}; + +static int __init exynos5250_get_asv_group(struct asv_info *asv_info) +{ + int exynos_asv_grp; + u32 exynos_orig_sp; + u32 exynos_mod_sp; + u32 package_id = asv_group.package_id; + + /* If ASV group is fused then retrieve it */ + if ((package_id >> FUSED_SG_OFFSET) & 0x1) { + exynos_orig_sp = (package_id >> ORIG_SG_OFFSET) & ORIG_SG_MASK; + exynos_mod_sp = (package_id >> MOD_SG_OFFSET) & MOD_SG_MASK; + + exynos_asv_grp = exynos_orig_sp - exynos_mod_sp; + if (exynos_asv_grp < 0) { + pr_warn("%s: Invalid ASV group: %d\n", __func__, + exynos_asv_grp); + exynos_asv_grp = 0; /* go for default */ + } + } else { + pr_warn("%s: ASV group not fused for : %s\n", __func__, + asv_info->name); + exynos_asv_grp = 0; /* go for default */ + } + + asv_info->asv_grp = exynos_asv_grp; + return 0; +} + +static int __init exynos5250_init_arm_asv_table(struct asv_info *asv_info) +{ + struct asv_freq_table *dvfs_table; + int i, asv_grp = asv_info->asv_grp; + + dvfs_table = kzalloc(sizeof(struct asv_freq_table) * ARM_LEVEL_NR, + GFP_KERNEL); + if (!dvfs_table) + return -ENOMEM; + + for (i = 0; i < ARM_LEVEL_NR; i++) { + dvfs_table[i].freq = asv_voltage[i][0]; + dvfs_table[i].volt = asv_voltage[i][asv_grp + 1]; + } + + asv_info->dvfs_table = dvfs_table; + return 0; +} + +/* TODO: Implement .init_asv callback to set ABB value */ + +static struct asv_ops exynos5250_arm_asv_ops __initdata = { + .get_asv_group = exynos5250_get_asv_group, + .init_asv_table = exynos5250_init_arm_asv_table, +}; + +static struct asv_info exynos5250_asv_member[] __initdata = { + { + .type = ASV_ARM, + .name = "VDD_ARM", + .ops = &exynos5250_arm_asv_ops, + .nr_dvfs_level = ARM_LEVEL_NR, + }, +}; + +int __init exynos5250_asv_init(struct exynos_asv_common *exynos_info) +{ + asv_group.package_id = readl(exynos_info->base + CHIP_ID_OFFSET); + + exynos_info->asv_list = exynos5250_asv_member; + exynos_info->nr_mem = ARRAY_SIZE(exynos5250_asv_member); + + return 0; +}