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Tue, 06 Jun 2023 16:53:42 +0200 Received: from dspam.blackshift.org (localhost [127.0.0.1]) by bjornoya.blackshift.org (Postfix) with SMTP id 367211D354D for ; Tue, 6 Jun 2023 14:53:40 +0000 (UTC) Received: from hardanger.blackshift.org (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by bjornoya.blackshift.org (Postfix) with ESMTPS id 05F411D3549; Tue, 6 Jun 2023 14:53:40 +0000 (UTC) Received: from [172.20.34.65] (localhost [::1]) by hardanger.blackshift.org (OpenSMTPD) with ESMTP id b06d55d8; Tue, 6 Jun 2023 14:53:39 +0000 (UTC) From: Marc Kleine-Budde Date: Tue, 06 Jun 2023 16:53:25 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20230606-phytec-som-imx8mm-v2-1-8c9368c8b4f9@pengutronix.de> References: <20230606-phytec-som-imx8mm-v2-0-8c9368c8b4f9@pengutronix.de> In-Reply-To: <20230606-phytec-som-imx8mm-v2-0-8c9368c8b4f9@pengutronix.de> To: barebox@lists.infradead.org X-Mailer: b4 0.13-dev-c6835 X-Developer-Signature: v=1; a=openpgp-sha256; l=1159; i=mkl@pengutronix.de; h=from:subject:message-id; bh=4xqu61lf3xCW17MQCgsj3DT9z/EaNHu0O2KgKHsN+HE=; b=owGbwMvMwMW4L0DGS6uL5QXjabUkhpR6j0z/LV3pUva1MS4GYkVMYfUcJ6V7PFTYjC82tujdX Nfg4tbJaMzCwMjFICumyMJ3tnHvik8mK+O/GgXADGJlApnCwMUpABNp38X+P15tfu0v//NqHHPu 6u/z09GL/jAhfK6F8+K81ZXcWroza37I8xd5Z1vJHdG+/unvMfYNcld3Pj+vsV5HVdLl5aMrHKZ zHJKnnOr5phx352zgo+6csp2bu8v5/JNVuz77F/7avKpat8hLdNmHWfYa3ffPHYiKuhA88bfKUv Ofun1pPNMcK/uX/Ly8bjJHxe1Qlp3OHl9UlSuTjebc1SyO4trMek2ax8I0wvjY7gVFKzRvKbM5C B4O2LMykLM3uyJxd9T69/aTGTaYTXwiqTRT1NYnUeyi2hMR06u79x2turLwvd2a5a6S8as8pGML 278+9xdsnfTh9R3fYO7Ps0WyksTeSBoxlbEeNxE3dTMAAA== X-Developer-Key: i=mkl@pengutronix.de; a=openpgp; fpr=C1400BA0B3989E6FBC7D5B5C2B5EE211C58AEA54 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230606_075343_271387_18A3095D X-CRM114-Status: GOOD ( 14.67 ) 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=-4.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v2 1/3] i2c: add for PBL use 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) Add a small helper to read a single page of EEPROM data. Signed-off-by: Marc Kleine-Budde --- include/pbl/eeprom.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/include/pbl/eeprom.h b/include/pbl/eeprom.h new file mode 100644 index 000000000000..df868b1a37fb --- /dev/null +++ b/include/pbl/eeprom.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PBL_EEPROM_H_ +#define __PBL_EEPROM_H_ + +#include +#include + +static inline void eeprom_read(struct pbl_i2c *i2c, u16 client_addr, u32 addr, void *buf, u16 count) +{ + u8 msgbuf[2]; + struct i2c_msg msg[] = { + { + .addr = client_addr, + .buf = msgbuf, + }, { + .addr = client_addr, + .flags = I2C_M_RD, + .buf = buf, + .len = count, + }, + }; + int ret, i = 0; + + if (addr & I2C_ADDR_16_BIT) + msgbuf[i++] = addr >> 8; + msgbuf[i++] = addr; + msg[0].len = i; + + ret = pbl_i2c_xfer(i2c, msg, ARRAY_SIZE(msg)); + if (ret != ARRAY_SIZE(msg)) + pr_err("Failed to read from eeprom@%x: %d\n", client_addr, ret); +} + +#endif -- 2.39.2