From patchwork Sat Sep 7 06:56:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H. Nikolaus Schaller" X-Patchwork-Id: 11136239 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C037D14ED for ; Sat, 7 Sep 2019 06:56:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A78021835 for ; Sat, 7 Sep 2019 06:56:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=goldelico.com header.i=@goldelico.com header.b="qNvPhg8Y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406508AbfIGG4l (ORCPT ); Sat, 7 Sep 2019 02:56:41 -0400 Received: from mo4-p02-ob.smtp.rzone.de ([85.215.255.82]:23277 "EHLO mo4-p02-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404387AbfIGG4k (ORCPT ); Sat, 7 Sep 2019 02:56:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1567839396; s=strato-dkim-0002; d=goldelico.com; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=AqD/iPQEOInFz2Pgsnu5OkcHusIVOg4mimADn66JWVw=; b=qNvPhg8YfGRkpb1VqA1JyW3aRkREYEzagtDpQa8bRWB4dlPX78ml0pXgY7XbDaej+9 A9EOpOthesggN/hMrciKQNN3mxx1jfLqhVbjXcWYyNdlF2QqH5LxoWzunMQa6mQf5AOq 7i9RudUvZnWj49N41nsnoG3lHcHQCAMCofVCNpn3bD97HiKfvrbRT/09EBDwTqrkT7gC GEsdnwcfPoTqZTjYL93CjSmNEToTd1UdBtk+CsRIU+3OaOuHgR18StUyEwPMu1EIHhpw W9UJECPiP93Uctx1QM4d7Qi/QyPhklnjrBsOMIEx95TG0yA43leXL6xHhNxvw/yhr3CH obBg== X-RZG-AUTH: ":JGIXVUS7cutRB/49FwqZ7WcJeFKiMhflhwDubTJ9o1mfYzBGHXL8GTntuxg=" X-RZG-CLASS-ID: mo00 Received: from iMac.fritz.box by smtp.strato.de (RZmta 44.27.0 DYNA|AUTH) with ESMTPSA id u036f9v876uIqXE (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Sat, 7 Sep 2019 08:56:18 +0200 (CEST) From: "H. Nikolaus Schaller" To: =?utf-8?q?Beno=C3=AEt_Cousson?= , Tony Lindgren , Rob Herring , Adam Ford , =?utf-8?q?Andr=C3=A9_Roth?= , Mark Rutland , "Rafael J. Wysocki" , Viresh Kumar , Enric Balletbo i Serra , Javier Martinez Canillas , Roger Quadros , Teresa Remmet , "H. Nikolaus Schaller" Cc: linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, letux-kernel@openphoenux.org, kernel@pyra-handheld.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/4] cpufreq: ti-cpufreq: add support for omap34xx and omap36xx Date: Sat, 7 Sep 2019 08:56:12 +0200 Message-Id: <0eb7129f6148faac0150d6299ac97347484c7125.1567839375.git.hns@goldelico.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This adds code and tables to read the silicon revision and eFuse (speed binned / 720 MHz grade) bits for selecting opp-v2 table entries. Since these bits are not always part of the syscon register range (like for am33xx, am43, dra7), we add code to directly read the register values using ioremap() if syscon access fails. The format of the opp-supported-hw entries is that it has two 32 bit bitfields. E.g.: opp-supported-hw = <0xffffffff 3> The first value is matched against the bit position of the silicon revision which is (see TRM) omap34xx: BIT(0) ES1.0 BIT(1) ES2.0 BIT(2) ES2.1 BIT(3) ES3.0 BIT(4) ES3.1 BIT(7) ES3.1.2 omap36xx: BIT(0) ES1.0 BIT(1) ES1.1 BIT(2) ES1.2 The second value is matched against the speed grade eFuse: BIT(0) no high speed OPP BIT(1) high speed OPP This means for the example above that it is always enabled while e.g. opp-supported-hw = <0x1 2> enables the OPP only for ES1.0 BIT(0) and if the high speed eFuse is set BIT(1). Signed-off-by: H. Nikolaus Schaller Reviewed-by: Tony Lindgren --- drivers/cpufreq/ti-cpufreq.c | 91 +++++++++++++++++++++++++++++++++++- 1 file changed, 89 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c index 2ad1ae17932d..f2f58d689320 100644 --- a/drivers/cpufreq/ti-cpufreq.c +++ b/drivers/cpufreq/ti-cpufreq.c @@ -31,6 +31,11 @@ #define DRA7_EFUSE_OD_MPU_OPP BIT(1) #define DRA7_EFUSE_HIGH_MPU_OPP BIT(2) +#define OMAP3_CONTROL_DEVICE_STATUS 0x4800244C +#define OMAP3_CONTROL_IDCODE 0x4830A204 +#define OMAP34xx_ProdID_SKUID 0x4830A20C +#define OMAP3_SYSCON_BASE (0x48000000 + 0x2000 + 0x270) + #define VERSION_COUNT 2 struct ti_cpufreq_data; @@ -84,6 +89,13 @@ static unsigned long dra7_efuse_xlate(struct ti_cpufreq_data *opp_data, return calculated_efuse; } +static unsigned long omap3_efuse_xlate(struct ti_cpufreq_data *opp_data, + unsigned long efuse) +{ + /* OPP enable bit ("Speed Binned") */ + return BIT(efuse); +} + static struct ti_cpufreq_soc_data am3x_soc_data = { .efuse_xlate = amx3_efuse_xlate, .efuse_fallback = AM33XX_800M_ARM_MPU_MAX_FREQ, @@ -111,6 +123,56 @@ static struct ti_cpufreq_soc_data dra7_soc_data = { .multi_regulator = true, }; +/* + * OMAP35x TRM (SPRUF98K): + * CONTROL_IDCODE (0x4830 A204) describes Silicon revisions. + * Control OMAP Status Register 15:0 (Address 0x4800 244C) + * to separate between omap3503, omap3515, omap3525, omap3530 + * and feature presence. + * There are encodings for versions limited to 400/266MHz + * but we ignore. + * Not clear if this also holds for omap34xx. + * some eFuse values e.g. CONTROL_FUSE_OPP1_VDD1 + * are stored in the SYSCON register range + * Register 0x4830A20C [ProdID.SKUID] [0:3] + * 0x0 for normal 600/430MHz device. + * 0x8 for 720/520MHz device. + * Not clear what omap34xx value is. + */ + +static struct ti_cpufreq_soc_data omap34xx_soc_data = { + .efuse_xlate = omap3_efuse_xlate, + .efuse_offset = OMAP34xx_ProdID_SKUID - OMAP3_SYSCON_BASE, + .efuse_shift = 3, + .efuse_mask = BIT(3), + .rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE, + .multi_regulator = false, +}; + +/* + * AM/DM37x TRM (SPRUGN4M) + * CONTROL_IDCODE (0x4830 A204) describes Silicon revisions. + * Control Device Status Register 15:0 (Address 0x4800 244C) + * to separate between am3703, am3715, dm3725, dm3730 + * and feature presence. + * Speed Binned = Bit 9 + * 0 800/600 MHz + * 1 1000/800 MHz + * some eFuse values e.g. CONTROL_FUSE_OPP 1G_VDD1 + * are stored in the SYSCON register range. + * There is no 0x4830A20C [ProdID.SKUID] register (exists but + * seems to always read as 0). + */ + +static struct ti_cpufreq_soc_data omap36xx_soc_data = { + .efuse_xlate = omap3_efuse_xlate, + .efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE, + .efuse_shift = 9, + .efuse_mask = BIT(9), + .rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE, + .multi_regulator = false, +}; + /** * ti_cpufreq_get_efuse() - Parse and return efuse value present on SoC * @opp_data: pointer to ti_cpufreq_data context @@ -127,7 +189,17 @@ static int ti_cpufreq_get_efuse(struct ti_cpufreq_data *opp_data, ret = regmap_read(opp_data->syscon, opp_data->soc_data->efuse_offset, &efuse); - if (ret) { + if (ret == -EIO) { + /* not a syscon register! */ + void __iomem *regs = ioremap(OMAP3_SYSCON_BASE + + opp_data->soc_data->efuse_offset, 4); + + if (!regs) + return -ENOMEM; + efuse = readl(regs); + iounmap(regs); + } + else if (ret) { dev_err(dev, "Failed to read the efuse value from syscon: %d\n", ret); @@ -158,7 +230,17 @@ static int ti_cpufreq_get_rev(struct ti_cpufreq_data *opp_data, ret = regmap_read(opp_data->syscon, opp_data->soc_data->rev_offset, &revision); - if (ret) { + if (ret == -EIO) { + /* not a syscon register! */ + void __iomem *regs = ioremap(OMAP3_SYSCON_BASE + + opp_data->soc_data->rev_offset, 4); + + if (!regs) + return -ENOMEM; + revision = readl(regs); + iounmap(regs); + } + else if (ret) { dev_err(dev, "Failed to read the revision number from syscon: %d\n", ret); @@ -190,6 +272,11 @@ static const struct of_device_id ti_cpufreq_of_match[] = { { .compatible = "ti,am33xx", .data = &am3x_soc_data, }, { .compatible = "ti,am43", .data = &am4x_soc_data, }, { .compatible = "ti,dra7", .data = &dra7_soc_data }, + { .compatible = "ti,omap34xx", .data = &omap34xx_soc_data, }, + { .compatible = "ti,omap36xx", .data = &omap36xx_soc_data, }, + /* legacy */ + { .compatible = "ti,omap3430", .data = &omap34xx_soc_data, }, + { .compatible = "ti,omap3630", .data = &omap36xx_soc_data, }, {}, };