From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Sun, 24 Jul 2022 08:08:37 +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 1oFUn7-001iKq-Tt for lore@lore.pengutronix.de; Sun, 24 Jul 2022 08:08:37 +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 1oFUn5-0006Rh-JO for lore@pengutronix.de; Sun, 24 Jul 2022 08:08:36 +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: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:In-Reply-To:References:List-Owner; bh=AjaH+DMNBxHyIdhF0tL3oNmw4vQo7dpfX8kyTvXRk+4=; b=qZkGgOPL22mPEHLcG4/2kXbV80 nzGixRxhd9h/32OHJzXhTQyb47sFm0GTxk3PA+FrN2JCHkUZKk5Lgs0S19uGfysmAfzpbFFipbCXY zv3YrWRm+phxe1/g2ppK4vPDsfNDizfZdEFrYgaMZuWlcAE8yQPnsfc2H2taLK1ln7HjPc2UzqE/+ wMfam8N/x6QDly1LmR4MfDHMcWYnW3OCM/EAkpT3DX5hsDeKUbXdHKitmKdepDXPi5J7FZAomULqx KPsLypRwrZeCSSfFzuQyW7lI1ZswQgdnhrGg95m3hZAs7ZRDP6T60BLCnpaE0CB8bs5WnNzLkslhW AaeXNW0g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oFUlZ-00GzsS-Jf; Sun, 24 Jul 2022 06:07:01 +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 1oFUlG-00Gzij-7k for barebox@lists.infradead.org; Sun, 24 Jul 2022 06:06:46 +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 1oFUlB-00065N-3W; Sun, 24 Jul 2022 08:06:37 +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 1oFUlA-002rUH-CL; Sun, 24 Jul 2022 08:06:36 +0200 Received: from afa by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oFUl9-007R2d-3Z; Sun, 24 Jul 2022 08:06:35 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Frank Wunderlich , Ahmad Fatoum Date: Sun, 24 Jul 2022 08:06:24 +0200 Message-Id: <20220724060629.1772193-1-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220723_230642_350641_B72D108E X-CRM114-Status: GOOD ( 19.78 ) 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=-4.1 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 autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v2 1/6] mfd: implement mfd_add_devices 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) This makes it easier to port Linux drivers like PMICs, where a device tree probed MFD node exists and the driver matching against it then registers a number of MFD cell devices, which don't have their own DT compatibles. Signed-off-by: Ahmad Fatoum --- v1 -> v2: - no change v0 (before folding into series) -> v1: - call device_add_data before platform_device_register, which may immediately probe (Sascha) --- drivers/base/resource.c | 2 +- drivers/mfd/Makefile | 2 ++ drivers/mfd/core.c | 25 +++++++++++++++++++++++++ include/driver.h | 2 +- include/linux/mfd/core.h | 23 +++++++++++++++++++++++ 5 files changed, 52 insertions(+), 2 deletions(-) create mode 100644 drivers/mfd/core.c create mode 100644 include/linux/mfd/core.h diff --git a/drivers/base/resource.c b/drivers/base/resource.c index d0d39620772e..0134456ffac2 100644 --- a/drivers/base/resource.c +++ b/drivers/base/resource.c @@ -20,7 +20,7 @@ struct device_d *device_alloc(const char *devname, int id) return dev; } -int device_add_data(struct device_d *dev, void *data, size_t size) +int device_add_data(struct device_d *dev, const void *data, size_t size) { free(dev->platform_data); diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 50f54cfcf21c..2b988bdc9a3d 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -1,4 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only +obj-y += core.o + obj-$(CONFIG_MFD_ACT8846) += act8846.o obj-$(CONFIG_MFD_DA9053) += da9053.o obj-$(CONFIG_MFD_DA9063) += da9063.o diff --git a/drivers/mfd/core.c b/drivers/mfd/core.c new file mode 100644 index 000000000000..495427ae9c87 --- /dev/null +++ b/drivers/mfd/core.c @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include + +int mfd_add_devices(struct device_d *parent, const struct mfd_cell *cells, int n_devs) +{ + struct device_d *dev; + int ret, i; + + for (i = 0; i < n_devs; i++) { + dev = device_alloc(cells[i].name, DEVICE_ID_DYNAMIC); + dev->parent = parent; + + ret = device_add_data(dev, &cells[i], sizeof(cells[i])); + if (ret) + return ret; + + ret = platform_device_register(dev); + if (ret) + return ret; + } + + return 0; +} diff --git a/include/driver.h b/include/driver.h index a89ce7af9ddd..67ffbba6be80 100644 --- a/include/driver.h +++ b/include/driver.h @@ -243,7 +243,7 @@ int device_add_resources(struct device_d *dev, const struct resource *res, int n int device_add_resource(struct device_d *dev, const char *resname, resource_size_t start, resource_size_t size, unsigned int flags); -int device_add_data(struct device_d *dev, void *data, size_t size); +int device_add_data(struct device_d *dev, const void *data, size_t size); /* * register a generic device diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h new file mode 100644 index 000000000000..2b3b51c69e5f --- /dev/null +++ b/include/linux/mfd/core.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2006 Ian Molton + * Copyright (c) 2007 Dmitry Baryshkov + */ + +#ifndef MFD_CORE_H +#define MFD_CORE_H + +struct device_d; + +/* + * This struct describes the MFD part ("cell"). + * After registration the copy of this structure will become the platform data + * of the resulting device_d + */ +struct mfd_cell { + const char *name; +}; + +int mfd_add_devices(struct device_d *parent, const struct mfd_cell *cells, int n_devs); + +#endif -- 2.30.2