From patchwork Mon Apr 15 19:19:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitor Soares X-Patchwork-Id: 10902749 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E3CD01932 for ; Tue, 16 Apr 2019 11:12:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA1832898C for ; Tue, 16 Apr 2019 11:12:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B839C28999; Tue, 16 Apr 2019 11:12:29 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2A9952898C for ; Tue, 16 Apr 2019 11:12:28 +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=Wpsu3blSUKMkWwhsktfz/2v+Abihz1sX3r4die9VWrA=; b=CbDp8OrwG9FdiccDWD+pbvk87C Bq6cqy3Q7fHfKb8OEFFm91iLWuqxpodeS2l0MzXN0GvvaRvfuvzQslr3V9vDP07IxQDp7MjWxlg8Q A5+AqZcdJEf9VywnSq2CXkEa2m1JyrTATa+HdKCde9zXo0eIXJ1uVJ2BmHwwjHM+7eUY+OcYqiXVd VDFIdYyFRWT3n+p8oTTbds18DR1yolOQ4wVfazV2DeOtppFJaaa6Oc1BDOnHHA2reNZ5yOxRXFqrt LrwYXj6juPm8FtAI1ii3d8eDdkuMz8opCbuSIQuq1o0LyRgvCP2tEmPKu1gGiPBpI1MkzxAM30P1h iPBVTK1g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGM0p-0001FC-HE; Tue, 16 Apr 2019 11:12:27 +0000 Received: from us01smtprelay-2.synopsys.com ([198.182.60.111] helo=smtprelay.synopsys.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hG79T-0001QD-Sw for linux-i3c@lists.infradead.org; Mon, 15 Apr 2019 19:20:27 +0000 Received: from mailhost1.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id C502D10C12A7; Mon, 15 Apr 2019 12:20:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1555356023; bh=XE5KlxeBcaMGeU9oOTfynmEvKq//ui0hxk9gOzVB3Eg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=D5SdTRYtiO+kOXffAiHnBKZq2L2kxq2xUsZz2li1FdjcplgyPTEd87I7TlhHCMk89 tqcxVSlTmzqztL9wh7KaRnvGR0EBlKh75QCm69HOA8Rflgzig2ITRMyJZo0l7GivuD cB4HBTR4ipiiywbnE8V/Mpl/RvkcugKqWz8U+sUEI0bqTofQl3g4T2e5rAfIenL6i0 77tvlptykrj34xf9WpfKQHk3CybxmrBgZ+FdxJeOSuNnSY0JvMJgPu5R5RpCWzS3I9 ga1zt1udot3FD/PfqZElz3YjPNrS/GpRNqeSUTPpyPIjP8WEs6UfscVGNxoRVZhUnG mZM3b+zqwalYw== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost1.synopsys.com (Postfix) with ESMTP id DAA0B546A; Mon, 15 Apr 2019 12:19:50 -0700 (PDT) From: Vitor Soares To: linux-iio@vger.kernel.org, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] remap: Add I3C bus support Date: Mon, 15 Apr 2019 21:19:39 +0200 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190415_122023_936627_B10A9697 X-CRM114-Status: GOOD ( 14.86 ) X-Mailman-Approved-At: Tue, 16 Apr 2019 04:12:26 -0700 X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux I3C List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lars@metafoo.de, bbrezillon@kernel.org, gregkh@linuxfoundation.org, joao.pinto@synopsys.com, rafael@kernel.org, Vitor Soares , broonie@kernel.org, pmeerw@pmeerw.net, knaack.h@gmx.de, lorenzo.bianconi83@gmail.com, jic23@kernel.org MIME-Version: 1.0 Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add basic support for I3C bus. This is a simple implementation that only give support for Read and Write commands. Signed-off-by: Vitor Soares --- drivers/base/regmap/Kconfig | 6 +++- drivers/base/regmap/Makefile | 1 + drivers/base/regmap/regmap-i3c.c | 62 ++++++++++++++++++++++++++++++++++++++++ include/linux/regmap.h | 20 +++++++++++++ 4 files changed, 88 insertions(+), 1 deletion(-) create mode 100644 drivers/base/regmap/regmap-i3c.c diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index 6ad5ef4..c8bbf53 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -4,7 +4,7 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_I3C) select IRQ_DOMAIN if REGMAP_IRQ bool @@ -49,3 +49,7 @@ config REGMAP_SOUNDWIRE config REGMAP_SCCB tristate depends on I2C + +config REGMAP_I3C + tristate + depends on I3C diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile index f5b4e88..ff6c7d8 100644 --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile @@ -16,3 +16,4 @@ obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o obj-$(CONFIG_REGMAP_W1) += regmap-w1.o obj-$(CONFIG_REGMAP_SOUNDWIRE) += regmap-sdw.o obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o +obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o diff --git a/drivers/base/regmap/regmap-i3c.c b/drivers/base/regmap/regmap-i3c.c new file mode 100644 index 0000000..565997b --- /dev/null +++ b/drivers/base/regmap/regmap-i3c.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates. + * + * Author: Vitor Soares + */ + +#include +#include +#include +#include + +static int regmap_i3c_write(void *context, const void *data, size_t count) +{ + struct device *dev = context; + struct i3c_device *i3c = dev_to_i3cdev(dev); + struct i3c_priv_xfer xfers[] = { + { + .rnw = false, + .len = count, + .data.out = data, + }, + }; + + return i3c_device_do_priv_xfers(i3c, xfers, 1); +} + +static int regmap_i3c_read(void *context, + const void *reg, size_t reg_size, + void *val, size_t val_size) +{ + struct device *dev = context; + struct i3c_device *i3c = dev_to_i3cdev(dev); + struct i3c_priv_xfer xfers[2]; + + xfers[0].rnw = false; + xfers[0].len = reg_size; + xfers[0].data.out = reg; + + xfers[1].rnw = true; + xfers[1].len = val_size; + xfers[1].data.in = val; + + return i3c_device_do_priv_xfers(i3c, xfers, 2); +} + +static struct regmap_bus regmap_i3c = { + .write = regmap_i3c_write, + .read = regmap_i3c_read, +}; + +struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name) +{ + return __devm_regmap_init(&i3c->dev, ®map_i3c, &i3c->dev, config, + lock_key, lock_name); +} +EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c); + +MODULE_LICENSE("GPL"); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index daeec7d..f65984d 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -25,6 +25,7 @@ struct module; struct clk; struct device; struct i2c_client; +struct i3c_device; struct irq_domain; struct slim_device; struct spi_device; @@ -624,6 +625,10 @@ struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus, const struct regmap_config *config, struct lock_class_key *lock_key, const char *lock_name); +struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name); /* * Wrapper for regmap_init macros to include a unique lockdep key and name * for each call. No-op if CONFIG_LOCKDEP is not set. @@ -982,6 +987,21 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg); #define devm_regmap_init_slimbus(slimbus, config) \ __regmap_lockdep_wrapper(__devm_regmap_init_slimbus, #config, \ slimbus, config) + +/** + * devm_regmap_init_i3c() - Initialise managed register map + * + * @i3c: Device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap. The regmap will be automatically freed by the + * device management code. + */ +#define devm_regmap_init_i3c(i3c, config) \ + __regmap_lockdep_wrapper(__devm_regmap_init_i3c, #config, \ + i3c, config) + int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk); void regmap_mmio_detach_clk(struct regmap *map); void regmap_exit(struct regmap *map);