From patchwork Tue Aug 16 08:27:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eliav Farber X-Patchwork-Id: 12944543 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 6B7FDC2BB41 for ; Tue, 16 Aug 2022 09:50:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233926AbiHPJut (ORCPT ); Tue, 16 Aug 2022 05:50:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234094AbiHPJu0 (ORCPT ); Tue, 16 Aug 2022 05:50:26 -0400 Received: from smtp-fw-2101.amazon.com (smtp-fw-2101.amazon.com [72.21.196.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BD2BF139D93; Tue, 16 Aug 2022 01:28:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1660638501; x=1692174501; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4O85Ywpsk0CWX8vVdYh3wJcHjYPaTGC/6XL8TPAGJOE=; b=oY6AdOURKu2wtaB8asLWGrTpXSq5hWNp7FQx+nWXbbMFCajnthtdnbbC rSHKiBHAW5Bu4YEzmk6SSAK+43mxqLH/QbITRF5Jtws6Lp+dWSVKlcthO mMXP2Ghi8t97y2uUwwqDt2zkmG0vQdfVJEJ/AQL1mV6ergZkfAdVBRj2v Y=; X-IronPort-AV: E=Sophos;i="5.93,240,1654560000"; d="scan'208";a="230105355" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-pdx-2c-b09ea7fa.us-west-2.amazon.com) ([10.43.8.6]) by smtp-border-fw-2101.iad2.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Aug 2022 08:28:20 +0000 Received: from EX13MTAUEE002.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-pdx-2c-b09ea7fa.us-west-2.amazon.com (Postfix) with ESMTPS id 46F4744ABC; Tue, 16 Aug 2022 08:28:18 +0000 (UTC) Received: from EX13D08UEE002.ant.amazon.com (10.43.62.92) by EX13MTAUEE002.ant.amazon.com (10.43.62.24) with Microsoft SMTP Server (TLS) id 15.0.1497.38; Tue, 16 Aug 2022 08:27:59 +0000 Received: from EX13MTAUEE002.ant.amazon.com (10.43.62.24) by EX13D08UEE002.ant.amazon.com (10.43.62.92) with Microsoft SMTP Server (TLS) id 15.0.1497.38; Tue, 16 Aug 2022 08:27:59 +0000 Received: from dev-dsk-farbere-1a-46ecabed.eu-west-1.amazon.com (172.19.116.181) by mail-relay.amazon.com (10.43.62.224) with Microsoft SMTP Server id 15.0.1497.38 via Frontend Transport; Tue, 16 Aug 2022 08:27:59 +0000 Received: by dev-dsk-farbere-1a-46ecabed.eu-west-1.amazon.com (Postfix, from userid 14301484) id 626CA4B60; Tue, 16 Aug 2022 08:27:57 +0000 (UTC) From: Eliav Farber To: , , , , , , CC: , , , , , , , , , , , , Subject: [PATCH 14/16] hwmon: (mr75203) parse thermal coefficients from device-tree Date: Tue, 16 Aug 2022 08:27:55 +0000 Message-ID: <20220816082757.11990-15-farbere@amazon.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220816082757.11990-1-farbere@amazon.com> References: <20220816082757.11990-1-farbere@amazon.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Use thermal coefficients from the device tree if they exist. Otherwise, use default values. The equation used in the driver is: T = G + H * (n / cal5 - 0.5) + J * F With this change we can support also Mode 1 Conversion, which uses A instead of G, and B instead of H. We can also support the series 6 equation that has different coefficients and has a slightly different format: T = G + H * (n / cal5 - 0.5) by setting J to 0. Signed-off-by: Eliav Farber --- drivers/hwmon/mr75203.c | 44 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 40 insertions(+), 4 deletions(-) diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c index 59e2dc8fa333..79831a0d5dca 100644 --- a/drivers/hwmon/mr75203.c +++ b/drivers/hwmon/mr75203.c @@ -129,6 +129,10 @@ struct pvt_device { u32 p_num; u32 v_num; u32 ip_freq; + u32 ts_coeff_h; + u32 ts_coeff_g; + s32 ts_coeff_j; + u32 ts_coeff_cal5; u8 vm_ch_max; u8 vm_ch_total; }; @@ -177,10 +181,10 @@ static int pvt_read_temp(struct device *dev, u32 attr, int channel, long *val) * Convert the register value to degrees centigrade temperature: * T = G + H * (n / cal5 - 0.5) + J * F */ - *val = PVT_G_CONST; - *val += PVT_H_CONST * nbs / PVT_CAL5_CONST; - *val -= PVT_H_CONST / 2; - *val += PVT_J_CONST * pvt->ip_freq / HZ_PER_MHZ; + *val = pvt->ts_coeff_g; + *val += pvt->ts_coeff_h * nbs / pvt->ts_coeff_cal5; + *val -= pvt->ts_coeff_h / 2; + *val += pvt->ts_coeff_j * pvt->ip_freq / HZ_PER_MHZ; return 0; default: @@ -617,6 +621,38 @@ static int mr75203_probe(struct platform_device *pdev) memset32(temp_config, HWMON_T_INPUT, ts_num); pvt_temp.config = temp_config; pvt_info[index++] = &pvt_temp; + + /* + * Incase ts-coeff-h/g/j/cal5 property is not defined, use + * default value. + */ + ret = of_property_read_u32(np, "ts-coeff-h", &pvt->ts_coeff_h); + if (ret) + pvt->ts_coeff_h = PVT_H_CONST; + + ret = of_property_read_u32(np, "ts-coeff-g", &pvt->ts_coeff_g); + if (ret) + pvt->ts_coeff_g = PVT_G_CONST; + + ret = of_property_read_s32(np, "ts-coeff-j", &pvt->ts_coeff_j); + if (ret) + pvt->ts_coeff_j = PVT_J_CONST; + + ret = of_property_read_u32(np, "ts-coeff-cal5", + &pvt->ts_coeff_cal5); + if (ret) { + pvt->ts_coeff_cal5 = PVT_CAL5_CONST; + } else { + if (pvt->ts_coeff_cal5 == 0) { + dev_err(dev, "invalid ts-coeff-cal5 (%u)\n", + pvt->ts_coeff_cal5); + return -EINVAL; + } + } + + dev_dbg(dev, "ts-coeff: h = %u, g = %u, j = %d, cal5 = %u\n", + pvt->ts_coeff_h, pvt->ts_coeff_g, pvt->ts_coeff_j, + pvt->ts_coeff_cal5); } if (pd_num) {