From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 18 Aug 2022 07:21:35 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oOXyK-002dP0-E0 for lore@lore.pengutronix.de; Thu, 18 Aug 2022 07:21:35 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oOXyH-0000ez-MU for lore@pengutronix.de; Thu, 18 Aug 2022 07:21:35 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zjHB7BQ31dpP1iwtKPiivBGt5EXD+uFJQY4Dkev4MdY=; b=PlC5tdL4Fx8VpT3O/YIeV+Doye iVU/bvhLz39AlfOterSR71aY6NcrB7lqdvNhz9x9LLJa1dBSsGx3Xxz0/+kMEFdodQD4+79XG7P7W QW9uEzlgYveQFJdBnJE0j+5gP4jp5tmG32DlpQ1fJTXNvDo+dpmFH3u3+XbIQBrHDgM/y+YmJ+wFO jmgo37qVIrpR2TThm+poRIaCd4fNwGdcj7sXLN1PVyuf0hAGqZ6VfbivpgKFHRd8skO8xHFjr9FBx x2KIcFb+smvTlQWRsT/calqYbOhtsUCTqzWCEW9HyavNL/brm7X3VopaiXVCMWsPihDhY483qM+1q 1hr4w5qA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOXwv-00FnIn-VO; Thu, 18 Aug 2022 05:20:10 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOXwm-00Fn3O-S3 for barebox@lists.infradead.org; Thu, 18 Aug 2022 05:20:02 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oOXwl-0008HC-0B; Thu, 18 Aug 2022 07:19:59 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oOXwk-000S3R-6a; Thu, 18 Aug 2022 07:19:58 +0200 Received: from afa by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oOXwi-008lHe-MM; Thu, 18 Aug 2022 07:19:56 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: lst@pengutronix.de, ukl@pengutronix.de, Ahmad Fatoum Date: Thu, 18 Aug 2022 07:19:50 +0200 Message-Id: <20220818051955.2088238-6-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220818051955.2088238-1-a.fatoum@pengutronix.de> References: <20220818051955.2088238-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220817_222001_022895_68613463 X-CRM114-Status: GOOD ( 18.65 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 05/10] soc: imx: add i.MX8M feature controller driver X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) The tester4 fuse bank of the i.MX8M is a 32-bit collection of fuses, apaprently fused during test, which contains information about the available IPs: How many cores are available and whether a VPU and GPU is available an usable. Add a imx8m_feat_ctrl_init() function that initializes a bitmap of supported features using tester4's value and registers a feature controller with a check callback that just looks up the relevant bit. This function can then be called from a standalone driver or from the fuse bank (ocotp) driver itself. Signed-off-by: Ahmad Fatoum --- drivers/soc/imx/Kconfig | 6 +++ drivers/soc/imx/Makefile | 1 + drivers/soc/imx/imx8m-featctrl.c | 64 ++++++++++++++++++++++++++++++++ include/soc/imx8m/featctrl.h | 25 +++++++++++++ 4 files changed, 96 insertions(+) create mode 100644 drivers/soc/imx/imx8m-featctrl.c create mode 100644 include/soc/imx8m/featctrl.h diff --git a/drivers/soc/imx/Kconfig b/drivers/soc/imx/Kconfig index 742d13c4f5d7..eabe4a06d22c 100644 --- a/drivers/soc/imx/Kconfig +++ b/drivers/soc/imx/Kconfig @@ -7,4 +7,10 @@ config IMX_GPCV2_PM_DOMAINS select PM_GENERIC_DOMAINS default y if ARCH_IMX7 || ARCH_IMX8MQ +config IMX8M_FEATCTRL + bool "i.MX8M feature controller" + depends on ARCH_IMX8M + select FEATURE_CONTROLLER + default y + endmenu diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile index 3a8a8d0b00db..bd1717b03883 100644 --- a/drivers/soc/imx/Makefile +++ b/drivers/soc/imx/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o +obj-$(CONFIG_IMX8M_FEATCTRL) += imx8m-featctrl.o diff --git a/drivers/soc/imx/imx8m-featctrl.c b/drivers/soc/imx/imx8m-featctrl.c new file mode 100644 index 000000000000..480c80e6c1d9 --- /dev/null +++ b/drivers/soc/imx/imx8m-featctrl.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-only +// SPDX-FileCopyrightText: 2022 Ahmad Fatoum, Pengutronix + +#include +#include +#include +#include + +#include + +struct imx_feat { + struct feature_controller feat; + unsigned long features[BITS_TO_LONGS(IMX8M_FEAT_END)]; +}; + +static struct imx_feat *to_imx_feat(struct feature_controller *feat) +{ + return container_of(feat, struct imx_feat, feat); +} + +static int imx8m_feat_check(struct feature_controller *feat, int idx) +{ + struct imx_feat *priv = to_imx_feat(feat); + + if (idx > IMX8M_FEAT_END) + return -EINVAL; + + return test_bit(idx, priv->features) ? FEATCTRL_OKAY : FEATCTRL_GATED; +} + +int imx8m_feat_ctrl_init(struct device_d *dev, u32 tester4, + const struct imx8m_featctrl_data *data) +{ + unsigned long *features; + struct imx_feat *priv; + + if (!dev || !data) + return -ENODEV; + + dev_dbg(dev, "tester4 = 0x%08x\n", tester4); + + priv = xzalloc(sizeof(*priv)); + features = priv->features; + + bitmap_fill(features, IMX8M_FEAT_END); + + if (tester4 & data->vpu_bitmask) + clear_bit(IMX8M_FEAT_VPU, features); + if (tester4 & data->gpu_bitmask) + clear_bit(IMX8M_FEAT_GPU, features); + + switch (tester4 & 3) { + case 0b11: + clear_bit(IMX8M_FEAT_CPU_DUAL, features); + fallthrough; + case 0b10: + clear_bit(IMX8M_FEAT_CPU_QUAD, features); + } + + priv->feat.dev = dev; + priv->feat.check = imx8m_feat_check; + + return feature_controller_register(&priv->feat); +} diff --git a/include/soc/imx8m/featctrl.h b/include/soc/imx8m/featctrl.h new file mode 100644 index 000000000000..af94995a916a --- /dev/null +++ b/include/soc/imx8m/featctrl.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* SPDX-FileCopyrightText: 2022 Ahmad Fatoum, Pengutronix */ + +#ifndef __IMX8M_FEATCTRL_H_ +#define __IMX8M_FEATCTRL_H_ + +#include + +struct imx8m_featctrl_data { + u32 vpu_bitmask; + u32 gpu_bitmask; +}; + +#ifdef CONFIG_IMX8M_FEATCTRL +int imx8m_feat_ctrl_init(struct device_d *dev, u32 tester4, + const struct imx8m_featctrl_data *data); +#else +static inline int imx8m_feat_ctrl_init(struct device_d *dev, u32 tester4, + const struct imx8m_featctrl_data *data) +{ + return -ENODEV; +} +#endif + +#endif -- 2.30.2