From patchwork Tue Dec 19 13:57:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 10123337 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 1C0CE603B5 for ; Tue, 19 Dec 2017 14:03:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0A8B2293CB for ; Tue, 19 Dec 2017 14:03:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0925A29408; Tue, 19 Dec 2017 14:03:05 +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=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8126A29414 for ; Tue, 19 Dec 2017 14:03:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=UBjowlorpb5Di4IbITMQbgN9rmIwqI0gSickDbfYnAY=; b=EpHW27tgqPcmRnxhs6meEGDkHS IzgvqjSOHyWJk9BEon/JHHjfPe18uHthcuKLOiPKeLQavyzvOLLm4UorHsEZ2jqhNsw1bODu6GPmp wUTsq4THMV7zV50QLin5TuG03W1ysFjd9p30XdVuGiDPsTqwGpvl/qTeptzCdKIFT25GL7XkbFdWJ +hSgY0dWsh9/URE6rTXZYnE1ALC58ASa3q2GsD51xz10u1eBJOD/SSzgX4pMA3FRzhscTc2ZU2HBX 1JF3w0WbwWwWFVi2/D2tKqRGlJKlRE6XcILeRKHcYale1o11ByrOqMvaV/ukfvBx/tH0/d8alQ55/ CSyX7e0Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1eRITy-0007GP-Q7; Tue, 19 Dec 2017 14:02:58 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1eRIPA-0002gt-AR for linux-arm-kernel@lists.infradead.org; Tue, 19 Dec 2017 13:58:13 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 6089C207A8; Tue, 19 Dec 2017 14:57:43 +0100 (CET) Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 8BE6D207C8; Tue, 19 Dec 2017 14:57:24 +0100 (CET) From: Miquel Raynal To: Zhang Rui , Eduardo Valentin , Rob Herring , Mark Rutland Subject: [PATCH v5 06/11] thermal: armada: Add support for Armada AP806 Date: Tue, 19 Dec 2017 14:57:14 +0100 Message-Id: <20171219135719.9531-7-miquel.raynal@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171219135719.9531-1-miquel.raynal@free-electrons.com> References: <20171219135719.9531-1-miquel.raynal@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171219_055801_428482_C69B86A8 X-CRM114-Status: GOOD ( 17.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Petazzoni , devicetree@vger.kernel.org, Baruch Siach , linux-pm@vger.kernel.org, Antoine Tenart , Nadav Haklai , David Sniatkiwicz , Miquel Raynal , Gregory Clement , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Baruch Siach The AP806 component is integrated in the Armada 8K and 7K lines of processors. The thermal sensor sample field on the status register is a signed value. Extend armada_get_temp() and the driver structure to handle signed values. Signed-off-by: Baruch Siach [: Changes when applying over the previous patches, including the register names changes, also switched the coefficients values to s64 instead of unsigned long to deal with negative values and used do_div instead of the traditionnal '/'] Signed-off-by: Miquel Raynal Reviewed-by: Gregory CLEMENT Tested-by: Gregory CLEMENT --- drivers/thermal/armada_thermal.c | 74 ++++++++++++++++++++++++++++++++-------- 1 file changed, 59 insertions(+), 15 deletions(-) diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c index ceebabf45c53..c7dcac39cbf9 100644 --- a/drivers/thermal/armada_thermal.c +++ b/drivers/thermal/armada_thermal.c @@ -47,6 +47,11 @@ #define CONTROL0_OFFSET 0x0 #define CONTROL1_OFFSET 0x4 +/* TSEN refers to the temperature sensors within the AP */ +#define CONTROL0_TSEN_START BIT(0) +#define CONTROL0_TSEN_RESET BIT(1) +#define CONTROL0_TSEN_ENABLE BIT(2) + struct armada_thermal_data; /* Marvell EBU Thermal Sensor Dev Structure */ @@ -66,10 +71,11 @@ struct armada_thermal_data { bool (*is_valid)(struct armada_thermal_priv *); /* Formula coeficients: temp = (b - m * reg) / div */ - unsigned long coef_b; - unsigned long coef_m; - unsigned long coef_div; + s64 coef_b; + s64 coef_m; + u32 coef_div; bool inverted; + bool signed_sample; /* Register shift and mask to access the sensor temperature */ unsigned int temp_shift; @@ -155,6 +161,18 @@ static void armada380_init_sensor(struct platform_device *pdev, } } +static void armada_ap806_init_sensor(struct platform_device *pdev, + struct armada_thermal_priv *priv) +{ + u32 reg; + + reg = readl_relaxed(priv->control0); + reg &= ~CONTROL0_TSEN_RESET; + reg |= CONTROL0_TSEN_START | CONTROL0_TSEN_ENABLE; + writel(reg, priv->control0); + msleep(10); +} + static bool armada_is_valid(struct armada_thermal_priv *priv) { u32 reg = readl_relaxed(priv->status); @@ -166,8 +184,8 @@ static int armada_get_temp(struct thermal_zone_device *thermal, int *temp) { struct armada_thermal_priv *priv = thermal->devdata; - unsigned long reg; - unsigned long m, b, div; + u32 reg, div; + s64 sample, b, m; /* Valid check */ if (priv->data->is_valid && !priv->data->is_valid(priv)) { @@ -178,6 +196,11 @@ static int armada_get_temp(struct thermal_zone_device *thermal, reg = readl_relaxed(priv->status); reg = (reg >> priv->data->temp_shift) & priv->data->temp_mask; + if (priv->data->signed_sample) + /* The most significant bit is the sign bit */ + sample = sign_extend32(reg, fls(priv->data->temp_mask) - 1); + else + sample = reg; /* Get formula coeficients */ b = priv->data->coef_b; @@ -185,9 +208,12 @@ static int armada_get_temp(struct thermal_zone_device *thermal, div = priv->data->coef_div; if (priv->data->inverted) - *temp = ((m * reg) - b) / div; + *temp = (m * sample) - b; else - *temp = (b - (m * reg)) / div; + *temp = b - (m * sample); + + do_div(*temp, div); + return 0; } @@ -199,8 +225,8 @@ static const struct armada_thermal_data armadaxp_data = { .init_sensor = armadaxp_init_sensor, .temp_shift = 10, .temp_mask = 0x1ff, - .coef_b = 3153000000UL, - .coef_m = 10000000UL, + .coef_b = 3153000000ULL, + .coef_m = 10000000ULL, .coef_div = 13825, }; @@ -210,8 +236,8 @@ static const struct armada_thermal_data armada370_data = { .is_valid_bit = BIT(9), .temp_shift = 10, .temp_mask = 0x1ff, - .coef_b = 3153000000UL, - .coef_m = 10000000UL, + .coef_b = 3153000000ULL, + .coef_m = 10000000ULL, .coef_div = 13825, }; @@ -221,8 +247,8 @@ static const struct armada_thermal_data armada375_data = { .is_valid_bit = BIT(10), .temp_shift = 0, .temp_mask = 0x1ff, - .coef_b = 3171900000UL, - .coef_m = 10000000UL, + .coef_b = 3171900000ULL, + .coef_m = 10000000ULL, .coef_div = 13616, .needs_control0 = true, }; @@ -233,12 +259,26 @@ static const struct armada_thermal_data armada380_data = { .is_valid_bit = BIT(10), .temp_shift = 0, .temp_mask = 0x3ff, - .coef_b = 1172499100UL, - .coef_m = 2000096UL, + .coef_b = 1172499100ULL, + .coef_m = 2000096ULL, .coef_div = 4201, .inverted = true, }; +static const struct armada_thermal_data armada_ap806_data = { + .is_valid = armada_is_valid, + .init_sensor = armada_ap806_init_sensor, + .is_valid_bit = BIT(16), + .temp_shift = 0, + .temp_mask = 0x3ff, + .coef_b = -150000LL, + .coef_m = 423ULL, + .coef_div = 1, + .inverted = true, + .signed_sample = true, + .needs_control0 = true, +}; + static const struct of_device_id armada_thermal_id_table[] = { { .compatible = "marvell,armadaxp-thermal", @@ -257,6 +297,10 @@ static const struct of_device_id armada_thermal_id_table[] = { .data = &armada380_data, }, { + .compatible = "marvell,armada-ap806-thermal", + .data = &armada_ap806_data, + }, + { /* sentinel */ }, };