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a=openpgp-sha256; l=1157; i=mkl@pengutronix.de; h=from:subject:message-id; bh=Z+m4Zn/N5R1A+bUH1sPmhVayWtQdZscU/f5TuH2fv0A=; b=owEBbQGS/pANAwAKAb5QHEoqigToAcsmYgBkfw9dAOoYN/rcxkktg4PrartfwZdxzXI0nVZH/ k2ZqdR5HTGJATMEAAEKAB0WIQQOzYG9qPI0qV/1MlC+UBxKKooE6AUCZH8PXQAKCRC+UBxKKooE 6L2bB/wMPvZsNdi4SXHQlLMW8TCG+ft3jdsXIFvY9SklH3WAISQOl7kuOh/r8RtgNwGxpEPnobC Dab2bOezSbvu/rQbnZA13woHqvKWAaScv8Er7Y3k3ObinvrJKxAjBU+z3MCLVuJfi1z2rr7cfMH JUUKAx1RQ+SrmIMurgEsu+fHoPLOTTHkeR5bA84pNxHRIszHSReLJg/tNBJeu9YoKyeZQt6JDCP 1NvbXElwggZJnECiW7glCwW8eXbBO9DmJeHcZACJ9QkJFAnz9fRF+z+9qZcIKQLcaPi694ZvIbc WiFou2OdZLltpae2SX83vxWdeJrPBaMMgeNcNhWMf1DW/o1c 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_035024_105943_5E8C851C X-CRM114-Status: GOOD ( 14.66 ) 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_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 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..b713cf154c99 --- /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->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