From patchwork Tue Aug 30 19:22:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Farber, Eliav" X-Patchwork-Id: 601164 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C256CECAAD8 for ; Tue, 30 Aug 2022 19:24:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231557AbiH3TYH (ORCPT ); Tue, 30 Aug 2022 15:24:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231685AbiH3TXh (ORCPT ); Tue, 30 Aug 2022 15:23:37 -0400 Received: from smtp-fw-33001.amazon.com (smtp-fw-33001.amazon.com [207.171.190.10]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED6D77B7A6; Tue, 30 Aug 2022 12:22:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1661887379; x=1693423379; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=o77vQ07d89glwBVV3yt+VAkiTa6XFTavUwgfAhgxg8E=; b=NerQXSoR3gsGvgRzhp5psBrMikXSmqYfnF/8umK2IhvKpwA6ZZEcn3Fc l2RfZtgjg9PYhOaTElmP0YQQy1ky03sHXKZb+5SbGReSKeq0nQ0Ilin9V znPna3N9597ZT2DVj2ymJ/WLRawN7ji/Mmn1PMcQZlX57sr1O0i7wjOUP g=; X-IronPort-AV: E=Sophos;i="5.93,275,1654560000"; d="scan'208";a="222136159" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-iad-1a-b27d4a00.us-east-1.amazon.com) ([10.43.8.6]) by smtp-border-fw-33001.sea14.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Aug 2022 19:22:42 +0000 Received: from EX13MTAUWA001.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan3.iad.amazon.com [10.40.163.38]) by email-inbound-relay-iad-1a-b27d4a00.us-east-1.amazon.com (Postfix) with ESMTPS id 44220811F5; Tue, 30 Aug 2022 19:22:39 +0000 (UTC) Received: from EX19D013UWA002.ant.amazon.com (10.13.138.210) by EX13MTAUWA001.ant.amazon.com (10.43.160.118) with Microsoft SMTP Server (TLS) id 15.0.1497.38; Tue, 30 Aug 2022 19:22:16 +0000 Received: from EX13MTAUWA001.ant.amazon.com (10.43.160.58) by EX19D013UWA002.ant.amazon.com (10.13.138.210) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1118.12; Tue, 30 Aug 2022 19:22:15 +0000 Received: from dev-dsk-farbere-1a-46ecabed.eu-west-1.amazon.com (172.19.116.181) by mail-relay.amazon.com (10.43.160.118) with Microsoft SMTP Server id 15.0.1497.38 via Frontend Transport; Tue, 30 Aug 2022 19:22:15 +0000 Received: by dev-dsk-farbere-1a-46ecabed.eu-west-1.amazon.com (Postfix, from userid 14301484) id 6C2ED4D4D; Tue, 30 Aug 2022 19:22:12 +0000 (UTC) From: Eliav Farber To: , , , , , , , CC: , , , , , , , , , , , , , Subject: [PATCH v3 15/19] hwmon: (mr75203) add support for series 6 temperature equation Date: Tue, 30 Aug 2022 19:22:08 +0000 Message-ID: <20220830192212.28570-16-farbere@amazon.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220830192212.28570-1-farbere@amazon.com> References: <20220830192212.28570-1-farbere@amazon.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The current equation used in code is aligned to series 5: T = G + H * (n / cal5 - 0.5) + J * F Where: G = 60, H = 200, cal5 = 4094, J = -0.1, F = frequency clock in MHz Series 6 has a slightly different equation: T = G + H * (n / cal5 - 0.5) and a different set of coefficients: G = 57.4, H = 249.4, cal5 = 4096 This change supports equation and coefficients for both series. (for series 6, J is set to 0). The series is determined according to “ts-series” property in device tree. If absent, series 5 is assumed to be the default. Signed-off-by: Eliav Farber --- V3 -> V2: - New patch to support temperature sensor series 6 instead of having to set all 4 coefficients. drivers/hwmon/mr75203.c | 69 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 63 insertions(+), 6 deletions(-) diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c index 5b8ca1ee4a54..6a035fd115ca 100644 --- a/drivers/hwmon/mr75203.c +++ b/drivers/hwmon/mr75203.c @@ -103,10 +103,6 @@ #define PVT_POLL_DELAY_US 20 #define PVT_POLL_TIMEOUT_US 20000 -#define PVT_H_CONST 200000 -#define PVT_G_CONST 60000 -#define PVT_J_CONST -100 -#define PVT_CAL5_CONST 4094 #define PVT_CONV_BITS 10 #define PVT_N_CONST 90 #define PVT_R_CONST 245805 @@ -114,9 +110,31 @@ #define PVT_TEMP_MIN -40000 #define PVT_TEMP_MAX 125000 +/* Temperature coefficients for series 5 */ +#define PVT_SERIES5_H_CONST 200000 +#define PVT_SERIES5_G_CONST 60000 +#define PVT_SERIES5_J_CONST -100 +#define PVT_SERIES5_CAL5_CONST 4094 + +/* Temperature coefficients for series 6 */ +#define PVT_SERIES6_H_CONST 249400 +#define PVT_SERIES6_G_CONST 57400 +#define PVT_SERIES6_J_CONST 0 +#define PVT_SERIES6_CAL5_CONST 4096 + +#define TEMPERATURE_SENSOR_SERIES_5 5 +#define TEMPERATURE_SENSOR_SERIES_6 6 + #define PRE_SCALER_X1 1 #define PRE_SCALER_X2 2 +struct temp_coeff { + u32 h; + u32 g; + u32 cal5; + s32 j; +}; + struct voltage_device { u32 vm_map; /* Map channel number to VM index */ u32 ch_map; /* Map channel number to channel index */ @@ -137,6 +155,7 @@ struct pvt_device { struct reset_control *rst; struct voltage_device *vd; struct voltage_channels vm_channels; + struct temp_coeff ts_coeff; u32 t_num; u32 p_num; u32 v_num; @@ -167,8 +186,9 @@ static long pvt_calc_temp(struct pvt_device *pvt, u32 nbs) * Convert the register value to degrees centigrade temperature: * T = G + H * (n / cal5 - 0.5) + J * F */ - s64 tmp = PVT_G_CONST + PVT_H_CONST * (s64)nbs / PVT_CAL5_CONST - - PVT_H_CONST / 2 + PVT_J_CONST * (s64)pvt->ip_freq / HZ_PER_MHZ; + struct temp_coeff *ts_coeff = &pvt->ts_coeff; + s64 tmp = ts_coeff->g + ts_coeff->h * (s64)nbs / ts_coeff->cal5 - + ts_coeff->h / 2 + ts_coeff->j * (s64)pvt->ip_freq / HZ_PER_MHZ; return clamp_val(tmp, PVT_TEMP_MIN, PVT_TEMP_MAX); } @@ -652,6 +672,39 @@ static int pvt_get_pre_scaler(struct device *dev, struct pvt_device *pvt) return ret; } +static int pvt_set_temp_coeff(struct device *dev, struct pvt_device *pvt) +{ + struct temp_coeff *ts_coeff = &pvt->ts_coeff; + const struct device_node *np = dev->of_node; + u32 series; + int ret; + + /* Incase ts-series property is not defined, use default 5. */ + ret = of_property_read_u32(np, "moortec,ts-series", &series); + if (ret) + series = TEMPERATURE_SENSOR_SERIES_5; + + if (series == TEMPERATURE_SENSOR_SERIES_5) { + ts_coeff->h = PVT_SERIES5_H_CONST; + ts_coeff->g = PVT_SERIES5_G_CONST; + ts_coeff->j = PVT_SERIES5_J_CONST; + ts_coeff->cal5 = PVT_SERIES5_CAL5_CONST; + } else if (series == TEMPERATURE_SENSOR_SERIES_6) { + ts_coeff->h = PVT_SERIES6_H_CONST; + ts_coeff->g = PVT_SERIES6_G_CONST; + ts_coeff->j = PVT_SERIES6_J_CONST; + ts_coeff->cal5 = PVT_SERIES6_CAL5_CONST; + } else { + dev_err(dev, "invalid temperature sensor series (%u)\n", + series); + return -EINVAL; + } + + dev_dbg(dev, "temperature sensor series = %u\n", series); + + return 0; +} + static int mr75203_probe(struct platform_device *pdev) { const struct hwmon_channel_info **pvt_info; @@ -722,6 +775,10 @@ static int mr75203_probe(struct platform_device *pdev) if (ret) return ret; + ret = pvt_set_temp_coeff(dev, pvt); + if (ret) + return ret; + temp_config = devm_kcalloc(dev, ts_num + 1, sizeof(*temp_config), GFP_KERNEL); if (!temp_config)