From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C7D2C433F5 for ; Thu, 21 Oct 2021 13:27:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50BD560EE2 for ; Thu, 21 Oct 2021 13:27:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231524AbhJUN35 (ORCPT ); Thu, 21 Oct 2021 09:29:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231424AbhJUN3y (ORCPT ); Thu, 21 Oct 2021 09:29:54 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B305C0613B9 for ; Thu, 21 Oct 2021 06:27:38 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: tonyk) with ESMTPSA id 913B01F44AAD From: =?UTF-8?q?Andr=C3=A9=20Almeida?= To: Mark Brown , Greg Kroah-Hartman , "Rafael J . Wysocki" Cc: linux-kernel@vger.kernel.org, kernel@collabora.com, Lucas Tanure , Charles Keepax , =?UTF-8?q?Andr=C3=A9=20Almeida?= Subject: [PATCH v3] regmap: spi: Set regmap max raw r/w from max_transfer_size Date: Thu, 21 Oct 2021 10:27:21 -0300 Message-Id: <20211021132721.13669-1-andrealmeid@collabora.com> X-Mailer: git-send-email 2.33.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lucas Tanure Set regmap raw read/write from spi max_transfer_size so regmap_raw_read/write can split the access into chunks Signed-off-by: Lucas Tanure Reviewed-by: Charles Keepax [AndrĂ©: fix build warning] Signed-off-by: AndrĂ© Almeida --- Changes from v2: - Fix build warning v2: https://lore.kernel.org/lkml/20210913130101.1577964-1-tanureal@opensource.cirrus.com/ drivers/base/regmap/regmap-spi.c | 36 ++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c index c1894e93c378..719323bc6c7f 100644 --- a/drivers/base/regmap/regmap-spi.c +++ b/drivers/base/regmap/regmap-spi.c @@ -109,13 +109,37 @@ static const struct regmap_bus regmap_spi = { .val_format_endian_default = REGMAP_ENDIAN_BIG, }; +static const struct regmap_bus *regmap_get_spi_bus(struct spi_device *spi, + const struct regmap_config *config) +{ + size_t max_size = spi_max_transfer_size(spi); + struct regmap_bus *bus; + + if (max_size != SIZE_MAX) { + bus = kmemdup(®map_spi, sizeof(*bus), GFP_KERNEL); + if (!bus) + return ERR_PTR(-ENOMEM); + + bus->free_on_exit = true; + bus->max_raw_read = max_size; + bus->max_raw_write = max_size; + return bus; + } + + return ®map_spi; +} + struct regmap *__regmap_init_spi(struct spi_device *spi, const struct regmap_config *config, struct lock_class_key *lock_key, const char *lock_name) { - return __regmap_init(&spi->dev, ®map_spi, &spi->dev, config, - lock_key, lock_name); + const struct regmap_bus *bus = regmap_get_spi_bus(spi, config); + + if (IS_ERR(bus)) + return ERR_CAST(bus); + + return __regmap_init(&spi->dev, bus, &spi->dev, config, lock_key, lock_name); } EXPORT_SYMBOL_GPL(__regmap_init_spi); @@ -124,8 +148,12 @@ struct regmap *__devm_regmap_init_spi(struct spi_device *spi, struct lock_class_key *lock_key, const char *lock_name) { - return __devm_regmap_init(&spi->dev, ®map_spi, &spi->dev, config, - lock_key, lock_name); + const struct regmap_bus *bus = regmap_get_spi_bus(spi, config); + + if (IS_ERR(bus)) + return ERR_CAST(bus); + + return __devm_regmap_init(&spi->dev, bus, &spi->dev, config, lock_key, lock_name); } EXPORT_SYMBOL_GPL(__devm_regmap_init_spi); -- 2.33.1