From patchwork Tue Feb 6 16:34:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter De Schrijver X-Patchwork-Id: 10203351 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 92F7D60327 for ; Tue, 6 Feb 2018 16:37:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8B90C28C9E for ; Tue, 6 Feb 2018 16:37:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7EA4F28CB5; Tue, 6 Feb 2018 16:37:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C750F28C9E for ; Tue, 6 Feb 2018 16:37:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752528AbeBFQek (ORCPT ); Tue, 6 Feb 2018 11:34:40 -0500 Received: from hqemgate14.nvidia.com ([216.228.121.143]:2233 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752236AbeBFQei (ORCPT ); Tue, 6 Feb 2018 11:34:38 -0500 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com id ; Tue, 06 Feb 2018 08:34:45 -0800 Received: from HQMAIL108.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Tue, 06 Feb 2018 08:35:21 -0800 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Tue, 06 Feb 2018 08:35:21 -0800 Received: from UKMAIL101.nvidia.com (10.26.138.13) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 6 Feb 2018 16:34:37 +0000 Received: from tbergstrom-lnx.Nvidia.com (10.21.24.170) by UKMAIL101.nvidia.com (10.26.138.13) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 6 Feb 2018 16:34:34 +0000 Received: from tbergstrom-lnx.nvidia.com (localhost [127.0.0.1]) by tbergstrom-lnx.Nvidia.com (Postfix) with ESMTP id 5C77FF80F4A; Tue, 6 Feb 2018 18:34:33 +0200 (EET) From: Peter De Schrijver To: , , , , , , , , , CC: Peter De Schrijver Subject: [PATCH v3 02/11] clk: tegra: retrieve regulator info from framework Date: Tue, 6 Feb 2018 18:34:03 +0200 Message-ID: <1517934852-23255-3-git-send-email-pdeschrijver@nvidia.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1517934852-23255-1-git-send-email-pdeschrijver@nvidia.com> References: <1517934852-23255-1-git-send-email-pdeschrijver@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-Originating-IP: [10.21.24.170] X-ClientProxiedBy: UKMAIL101.nvidia.com (10.26.138.13) To UKMAIL101.nvidia.com (10.26.138.13) Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The CVB table contains calibration data for the CPU DFLL based on process charaterization. The regulator step and offset parameters depend on the regulator supplying vdd-cpu , not on the specific Tegra SKU. Hence than hardcoding those regulator parameters in the CVB table, retrieve them from the regulator framework and store them as part of the tegra_dfll_soc_data struct. Signed-off-by: Peter De Schrijver --- drivers/clk/tegra/clk-dfll.h | 2 ++ drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 42 +++++++++++++++++++++++++----- drivers/clk/tegra/cvb.c | 16 +++++++++--- drivers/clk/tegra/cvb.h | 6 ++--- 4 files changed, 53 insertions(+), 13 deletions(-) diff --git a/drivers/clk/tegra/clk-dfll.h b/drivers/clk/tegra/clk-dfll.h index 83352c8..e7cbc5b 100644 --- a/drivers/clk/tegra/clk-dfll.h +++ b/drivers/clk/tegra/clk-dfll.h @@ -21,6 +21,7 @@ #include #include #include +#include "cvb.h" /** * struct tegra_dfll_soc_data - SoC-specific hooks/integration for the DFLL driver @@ -35,6 +36,7 @@ struct tegra_dfll_soc_data { struct device *dev; unsigned long max_freq; const struct cvb_table *cvb; + struct rail_alignment alignment; void (*init_clock_trimmers)(void); void (*set_clock_trimmers_high)(void); diff --git a/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c b/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c index 269d359..e2dbb79 100644 --- a/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c +++ b/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include "clk.h" @@ -42,9 +43,6 @@ .process_id = -1, .min_millivolts = 900, .max_millivolts = 1260, - .alignment = { - .step_uv = 10000, /* 10mV */ - }, .speedo_scale = 100, .voltage_scale = 1000, .entries = { @@ -82,6 +80,34 @@ }, }; +static int get_alignment_from_regulator(struct device *dev, + struct rail_alignment *align) +{ + int min_uV, max_uV, n_voltages, ret; + struct regulator *reg; + + reg = devm_regulator_get(dev, "vdd-cpu"); + if (IS_ERR(reg)) + return PTR_ERR(reg); + + ret = regulator_get_constraint_voltages(reg, &min_uV, &max_uV); + if (!ret) + align->offset_uv = min_uV; + else + return ret; + + align->step_uv = regulator_get_linear_step(reg); + if (!align->step_uv && !ret) { + n_voltages = regulator_count_voltages(reg); + if (n_voltages > 1) + align->step_uv = (max_uV - min_uV) / (n_voltages - 1); + } + + devm_regulator_put(reg); + + return 0; +} + static int tegra124_dfll_fcpu_probe(struct platform_device *pdev) { int process_id, speedo_id, speedo_value, err; @@ -108,10 +134,14 @@ static int tegra124_dfll_fcpu_probe(struct platform_device *pdev) } soc->max_freq = cpu_max_freq_table[speedo_id]; + err = get_alignment_from_regulator(&pdev->dev, &soc->alignment); + if (err < 0) + return err; - soc->cvb = tegra_cvb_add_opp_table(soc->dev, tegra124_cpu_cvb_tables, - ARRAY_SIZE(tegra124_cpu_cvb_tables), - process_id, speedo_id, speedo_value, + soc->cvb = tegra_cvb_add_opp_table(soc->dev, fcpu_data->cpu_cvb_tables, + fcpu_data->cpu_cvb_tables_size, + &soc->alignment, process_id, + speedo_id, speedo_value, soc->max_freq); if (IS_ERR(soc->cvb)) { dev_err(&pdev->dev, "couldn't add OPP table: %ld\n", diff --git a/drivers/clk/tegra/cvb.c b/drivers/clk/tegra/cvb.c index da9e8e7..2aa9639 100644 --- a/drivers/clk/tegra/cvb.c +++ b/drivers/clk/tegra/cvb.c @@ -62,11 +62,17 @@ static int round_voltage(int mv, const struct rail_alignment *align, int up) } static int build_opp_table(struct device *dev, const struct cvb_table *table, + struct rail_alignment *align, int speedo_value, unsigned long max_freq) { - const struct rail_alignment *align = &table->alignment; int i, ret, dfll_mv, min_mv, max_mv; + if (!align->step_uv) + return -EINVAL; + + if (!align->offset_uv) + return -EINVAL; + min_mv = round_voltage(table->min_millivolts, align, UP); max_mv = round_voltage(table->max_millivolts, align, DOWN); @@ -109,8 +115,9 @@ static int build_opp_table(struct device *dev, const struct cvb_table *table, */ const struct cvb_table * tegra_cvb_add_opp_table(struct device *dev, const struct cvb_table *tables, - size_t count, int process_id, int speedo_id, - int speedo_value, unsigned long max_freq) + size_t count, struct rail_alignment *align, + int process_id, int speedo_id, int speedo_value, + unsigned long max_freq) { size_t i; int ret; @@ -124,7 +131,8 @@ static int build_opp_table(struct device *dev, const struct cvb_table *table, if (table->process_id != -1 && table->process_id != process_id) continue; - ret = build_opp_table(dev, table, speedo_value, max_freq); + ret = build_opp_table(dev, table, align, speedo_value, + max_freq); return ret ? ERR_PTR(ret) : table; } diff --git a/drivers/clk/tegra/cvb.h b/drivers/clk/tegra/cvb.h index c1f0779..bcf15a0 100644 --- a/drivers/clk/tegra/cvb.h +++ b/drivers/clk/tegra/cvb.h @@ -49,7 +49,6 @@ struct cvb_table { int min_millivolts; int max_millivolts; - struct rail_alignment alignment; int speedo_scale; int voltage_scale; @@ -59,8 +58,9 @@ struct cvb_table { const struct cvb_table * tegra_cvb_add_opp_table(struct device *dev, const struct cvb_table *cvb_tables, - size_t count, int process_id, int speedo_id, - int speedo_value, unsigned long max_freq); + size_t count, struct rail_alignment *align, + int process_id, int speedo_id, int speedo_value, + unsigned long max_freq); void tegra_cvb_remove_opp_table(struct device *dev, const struct cvb_table *table, unsigned long max_freq);