From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 18 Aug 2022 07:22:20 +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 1oOXz3-002dTR-1c for lore@lore.pengutronix.de; Thu, 18 Aug 2022 07:22:20 +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 1oOXz0-0000wJ-6h for lore@pengutronix.de; Thu, 18 Aug 2022 07:22:19 +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=tdEiE7VBgh7pqnvqlkl8BGDLesVMvddLD5QVLPFtEd8=; b=cRtvPyqeGW/iieEBg+8bdHkPhR kM9s/KJfWwiKWVx5riYYZozj2PTUfRNRdjQJ0CRxKQckJjnQDiRtTHr+gTDNXzZbruaDjFE3sgymG RIyZrzmZGvN7OaggZH0WHTnjGEfpW+B4GywdyvAOq897ybt7TZnUG/FDyFXb283Mn6CicWnJ2+crD AxH9jPSg77GjhNpNupTQPm9+HpO1K34Vtn3ZXE5WlIk2B1zU4jKUAGbmDPwNcA9gUkB3HawoNKytt UolZzzJY1fzfBqwwTaXCbvPVKmz8OFbpodug0fscNNZ/GxSXcywbbc0djaMrlyt9YwTi7EtblKTmD myCQvsfg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOXxh-00Fotn-Ng; Thu, 18 Aug 2022 05:20:57 +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 1oOXwv-00FnND-5a for barebox@lists.infradead.org; Thu, 18 Aug 2022 05:20:11 +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-0008Hq-Ed; 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-000S3h-Lm; 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-008lHh-Mh; 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 07:19:51 +0200 Message-Id: <20220818051955.2088238-7-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_222009_256075_ADFB3EDF X-CRM114-Status: GOOD ( 12.57 ) 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 06/10] nvmem: import Linux nvmem_cell_read_variable_le_u32 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) We already have nvmem_cell_get_and_read(), so add its Linux sibling nvmem_cell_read_variable_le_u32 as well, which additionally takes care of conversion to little-endian. Signed-off-by: Ahmad Fatoum --- drivers/nvmem/core.c | 33 +++++++++++++++++++++++++++++++++ include/linux/nvmem-consumer.h | 9 +++++++++ 2 files changed, 42 insertions(+) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index fed387c43a26..c5fe5f6b767a 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -803,3 +803,36 @@ void *nvmem_cell_get_and_read(struct device_node *np, const char *cell_name, return value; } EXPORT_SYMBOL_GPL(nvmem_cell_get_and_read); + +/** + * nvmem_cell_read_variable_le_u32() - Read up to 32-bits of data as a little endian number. + * + * @dev: Device that requests the nvmem cell. + * @cell_id: Name of nvmem cell to read. + * @val: pointer to output value. + * + * Return: 0 on success or negative errno. + */ +int nvmem_cell_read_variable_le_u32(struct device_d *dev, const char *cell_id, + u32 *val) +{ + size_t len; + const u8 *buf; + int i; + + len = sizeof(*val); + + buf = nvmem_cell_get_and_read(dev->device_node, cell_id, len); + if (IS_ERR(buf)) + return PTR_ERR(buf); + + /* Copy w/ implicit endian conversion */ + *val = 0; + for (i = 0; i < len; i++) + *val |= buf[i] << (8 * i); + + kfree(buf); + + return 0; +} +EXPORT_SYMBOL_GPL(nvmem_cell_read_variable_le_u32); diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h index b979f23372a6..b461f840957e 100644 --- a/include/linux/nvmem-consumer.h +++ b/include/linux/nvmem-consumer.h @@ -34,6 +34,8 @@ void nvmem_cell_put(struct nvmem_cell *cell); void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len); void *nvmem_cell_get_and_read(struct device_node *np, const char *cell_name, size_t bytes); +int nvmem_cell_read_variable_le_u32(struct device_d *dev, const char *cell_id, + u32 *val); int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len); @@ -75,6 +77,13 @@ static inline void *nvmem_cell_get_and_read(struct device_node *np, return ERR_PTR(-EOPNOTSUPP); } +static inline int nvmem_cell_read_variable_le_u32(struct device_d *dev, + const char *cell_id, + u32 *val) +{ + return ERR_PTR(-EOPNOTSUPP); +} + static inline int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len) { -- 2.30.2